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QWidget
- 概要
  - 函数
  - 虚函数
  - 槽
  - 信号
  - 静态函数
- 详细描述

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QWidget ¶

QWidget 类是所有用户界面对象的基类。更多 …

继承者： QtCharts.QChartView , QHelpContentWidget , QHelpFilterSettingsWidget , QHelpIndexWidget , QHelpSearchQueryWidget , QHelpSearchResultWidget , QCameraViewfinder , QVideoWidget , QGLWidget , QAbstractPrintDialog , QPageSetupDialog , QPrintDialog , QPrintPreviewDialog , QPrintPreviewWidget , QQuickWidget , QSvgWidget , QWebEngineView , QAbstractButton , QAbstractItemView , QAbstractScrollArea , QAbstractSlider , QAbstractSpinBox , QCalendarWidget , QCheckBox , QColorDialog , QColumnView , QComboBox , QCommandLinkButton , QDateEdit , QDateTimeEdit , QDesktopWidget , QDial , QDialog , QDialogButtonBox , QDockWidget , QDoubleSpinBox , QErrorMessage , QFileDialog , QFocusFrame , QFontComboBox , QFontDialog , QFrame , QGraphicsView , QGroupBox , QHeaderView , QInputDialog , QKeySequenceEdit , QLCDNumber , QLabel , QLineEdit , QListView , QListWidget , QMainWindow , QMdiArea , QMdiSubWindow , QMenu , QMenuBar , QMessageBox , QOpenGLWidget , QPlainTextEdit , QProgressBar , QProgressDialog , QPushButton , QRadioButton , QRubberBand , QScrollArea , QScrollBar , QSizeGrip , QSlider , QSpinBox , QSplashScreen , QSplitter , QSplitterHandle , QStackedWidget , QStatusBar , QTabBar , QTabWidget , QTableView , QTableWidget , QTextBrowser , QTextEdit , QTimeEdit , QToolBar , QToolBox , QToolButton , QTreeView , QTreeWidget , QUndoView , QWizard , QWizardPage

概要 ¶

函数 ¶

def acceptDrops ()
def accessibleDescription ()
def accessibleName ()
def actions ()
def activateWindow ()
def addAction (action)
def addActions (actions)
def adjustSize ()
def autoFillBackground ()
def backgroundRole ()
def backingStore ()
def baseSize ()
def childAt (p)
def childAt (x, y)
def childrenRect ()
def childrenRegion ()
def clearFocus ()
def clearMask ()
def contentsMargins ()
def contentsRect ()
def contextMenuPolicy ()
def create ([arg__1=0[, initializeWindow=true[, destroyOldWindow=true]]])
def createWinId ()
def cursor ()
def destroy ([destroyWindow=true[, destroySubWindows=true]])
def effectiveWinId ()
def ensurePolished ()
def focusNextChild ()
def focusPolicy ()
def focusPreviousChild ()
def focusProxy ()
def focusWidget ()
def font ()
def fontInfo ()
def fontMetrics ()
def foregroundRole ()
def frameGeometry ()
def frameSize ()
def geometry ()
def getContentsMargins ()
def grab ([rectangle=QRect(QPoint(0, 0), QSize(-1, -1))])
def grabGesture (type[, flags=Qt.GestureFlags()])
def grabKeyboard ()
def grabMouse ()
def grabMouse (arg__1)
def grabShortcut (key[, context=Qt.WindowShortcut])
def graphicsEffect ()
def graphicsProxyWidget ()
def hasFocus ()
def hasMouseTracking ()
def hasTabletTracking ()
def inputMethodHints ()
def insertAction (before, action)
def insertActions (before, actions)
def internalWinId ()
def isActiveWindow ()
def isAncestorOf (child)
def isEnabled ()
def isEnabledTo (arg__1)
def isEnabledToTLW ()
def isFullScreen ()
def isHidden ()
def isLeftToRight ()
def isMaximized ()
def isMinimized ()
def isModal ()
def isRightToLeft ()
def isTopLevel ()
def isVisible ()
def isVisibleTo (arg__1)
def isWindow ()
def isWindowModified ()
def layout ()
def layoutDirection ()
def locale ()
def mapFrom (arg__1, arg__2)
def mapFromGlobal (arg__1)
def mapFromParent (arg__1)
def mapTo (arg__1, arg__2)
def mapToGlobal (arg__1)
def mapToParent (arg__1)
def mask ()
def maximumHeight ()
def maximumSize ()
def maximumWidth ()
def minimumHeight ()
def minimumSize ()
def minimumWidth ()
def move (arg__1)
def move (x, y)
def nativeParentWidget ()
def nextInFocusChain ()
def normalGeometry ()
def overrideWindowFlags (type)
def overrideWindowState (state)
def palette ()
def parentWidget ()
def pos ()
def previousInFocusChain ()
def rect ()
def releaseKeyboard ()
def releaseMouse ()
def releaseShortcut (id)
def removeAction (action)
def render (painter, targetOffset[, sourceRegion=QRegion()[, renderFlags=QWidget.RenderFlags(DrawWindowBackground | DrawChildren)]])
def render (target[, targetOffset=QPoint()[, sourceRegion=QRegion()[, renderFlags=QWidget.RenderFlags(DrawWindowBackground | DrawChildren)]]])
def repaint (arg__1)
def repaint (arg__1)
def repaint (x, y, w, h)
def resize (arg__1)
def resize (w, h)
def restoreGeometry (geometry)
def saveGeometry ()
def screen ()
def scroll (dx, dy)
def scroll (dx, dy, arg__3)
def setAcceptDrops (on)
def setAccessibleDescription (description)
def setAccessibleName (name)
def setAttribute (arg__1[, on=true])
def setAutoFillBackground (enabled)
def setBackgroundRole (arg__1)
def setBaseSize (arg__1)
def setBaseSize (basew, baseh)
def setContentsMargins (left, top, right, bottom)
def setContentsMargins (margins)
def setContextMenuPolicy (policy)
def setCursor (arg__1)
def setFixedHeight (h)
def setFixedSize (arg__1)
def setFixedSize (w, h)
def setFixedWidth (w)
def setFocus (reason)
def setFocusPolicy (policy)
def setFocusProxy (arg__1)
def setFont (arg__1)
def setForegroundRole (arg__1)
def setGeometry (arg__1)
def setGeometry (x, y, w, h)
def setGraphicsEffect (effect)
def setInputMethodHints (hints)
def setLayout (arg__1)
def setLayoutDirection (direction)
def setLocale (locale)
def setMask (arg__1)
def setMask (arg__1)
def setMaximumHeight (maxh)
def setMaximumSize (arg__1)
def setMaximumSize (maxw, maxh)
def setMaximumWidth (maxw)
def setMinimumHeight (minh)
def setMinimumSize (arg__1)
def setMinimumSize (minw, minh)
def setMinimumWidth (minw)
def setMouseTracking (enable)
def setPalette (arg__1)
def setParent (parent)
def setParent (parent, f)
def setShortcutAutoRepeat (id[, enable=true])
def setShortcutEnabled (id[, enable=true])
def setSizeIncrement (arg__1)
def setSizeIncrement (w, h)
def setSizePolicy (arg__1)
def setSizePolicy (horizontal, vertical)
def setStatusTip (arg__1)
def setStyle (arg__1)
def setTabletTracking (enable)
def setToolTip (arg__1)
def setToolTipDuration (msec)
def setUpdatesEnabled (enable)
def setWhatsThis (arg__1)
def setWindowFilePath (filePath)
def setWindowFlag (arg__1[, on=true])
def setWindowFlags (type)
def setWindowIcon (icon)
def setWindowIconText (arg__1)
def setWindowModality (windowModality)
def setWindowOpacity (level)
def setWindowRole (arg__1)
def setWindowState (state)
def size ()
def sizeIncrement ()
def sizePolicy ()
def stackUnder (arg__1)
def statusTip ()
def style ()
def styleSheet ()
def testAttribute (arg__1)
def toolTip ()
def toolTipDuration ()
def topLevelWidget ()
def underMouse ()
def ungrabGesture (type)
def unsetCursor ()
def unsetLayoutDirection ()
def unsetLocale ()
def update (arg__1)
def update (arg__1)
def update (x, y, w, h)
def updateGeometry ()
def updatesEnabled ()
def visibleRegion ()
def whatsThis ()
def winId ()
def window ()
def windowFilePath ()
def windowFlags ()
def windowHandle ()
def windowIcon ()
def windowIconText ()
def windowModality ()
def windowOpacity ()
def windowRole ()
def windowState ()
def windowTitle ()
def windowType ()
def x ()
def y ()

静态函数 ¶

def createWindowContainer (window[, parent=None[, flags=Qt.WindowFlags()]])
def find (arg__1)
def keyboardGrabber ()
def mouseGrabber ()
def setTabOrder (arg__1, arg__2)

详细描述 ¶

Widget 是用户界面原子：它从窗口系统接收鼠标、键盘及其它事件，并在屏幕上描绘自身表示。每个 Widget 为矩形，且按 Z 次序排序。Widget 被父级及其前面的小部件裁剪。

未嵌入父级小部件的 Widget 称为窗口。通常，窗口拥有框架和标题栏，尽管还可以创建不带这种装饰的窗口使用适合 window flags )。在 Qt 中， QMainWindow 和各种子类化 QDialog 是最常见的窗口类型。

Every widget’s constructor accepts one or two standard arguments:

QWidget *parent = nullptr 是新 Widget 的父级。若它为 None (默认)，新的小部件将是窗口。若不是，它将是子级对于 parent ，并被约束由 parent ’s geometry (unless you specify Window 作为窗口标志)。

Qt::WindowFlags f = { } (若可用的话) 设置窗口标志；默认适于几乎所有小部件，但要获得如没有窗口系统框架的窗口，就必须使用特殊标志。

QWidget has many member functions, but some of them have little direct functionality; for example, QWidget has a font property, but never uses this itself. There are many subclasses which provide real functionality, such as QLabel , QPushButton , QListWidget ，和 QTabWidget .

顶层和子级 Widget ¶

没有父级小部件的 Widget 始终是独立窗口 (顶层小部件)。对于这些小部件， setWindowTitle() and setWindowIcon() set the title bar and icon respectively.

非窗口 Widget 是子级小部件，显示在其父级小部件内。Qt 中的大多数 Widget 主要用作子级小部件。例如，将按钮显示成顶层窗口是可能的，但大多数人更喜欢将按钮放在其它小部件内，譬如 QDialog .

以上简图展示 QGroupBox 小部件用于将各种子级 Widget 保持在布局中，提供通过 QGridLayout 。 QLabel 子级小部件已提纲以指示其完整大小。

若希望使用 QWidget to hold child widgets you will usually want to add a layout to the parent QWidget 。见布局管理了解更多信息。

复合 Widget ¶

当 Widget 被用作分组多个子级 Widget 的容器时，它被称为复合 Widget。这些可以被创建，通过构造 Widget 采用所需视觉特性 QFrame ，例如：把子级 Widget 添加给它，通常由布局进行管理。上图展示使用 Qt Designer 创建这种。

Composite widgets can also be created by subclassing a standard widget, such as QWidget or QFrame ，并在子类的构造函数中添加必要布局和子级 Widget。许多随 Qt 提供的范例使用这种途径，且它还涵盖于 Qt 教程 .

自定义 Widget 和描绘 ¶

Since QWidget 是子类化的 QPaintDevice ，子类可以被用于显示由一系列描绘操作组成的自定义内容，采用实例化的 QPainter 类。此途径对比画布样式途径使用图形视图框架，其中的项由应用程序添加到场景，并由框架本身渲染。

每个 Widget 履行所有描绘操作均在其 paintEvent() function. This is called whenever the widget needs to be redrawn, either as a result of some external change or when requested by the application.

指针式时钟范例展示简单 Widget 如何处理描绘事件。

大小提示和大小策略 ¶

When implementing a new widget, it is almost always useful to reimplement sizeHint() to provide a reasonable default size for the widget and to set the correct size policy with setSizePolicy() .

By default, composite widgets which do not provide a size hint will be sized according to the space requirements of their child widgets.

The size policy lets you supply good default behavior for the layout management system, so that other widgets can contain and manage yours easily. The default size policy indicates that the size hint represents the preferred size of the widget, and this is often good enough for many widgets.

注意

The size of top-level widgets are constrained to 2/3 of the desktop’s height and width. You can resize() the widget manually if these bounds are inadequate.

事件 ¶

Widgets respond to events that are typically caused by user actions. Qt delivers events to widgets by calling specific event handler functions with instances of QEvent subclasses containing information about each event.

If your widget only contains child widgets, you probably do not need to implement any event handlers. If you want to detect a mouse click in a child widget call the child’s underMouse() function inside the widget’s mousePressEvent() .

Scribble example implements a wider set of events to handle mouse movement, button presses, and window resizing.

You will need to supply the behavior and content for your own widgets, but here is a brief overview of the events that are relevant to QWidget , starting with the most common ones:

paintEvent() is called whenever the widget needs to be repainted. Every widget displaying custom content must implement it. Painting using a QPainter can only take place in a paintEvent() or a function called by a paintEvent() .

resizeEvent() is called when the widget has been resized.

mousePressEvent() is called when a mouse button is pressed while the mouse cursor is inside the widget, or when the widget has grabbed the mouse using grabMouse() . Pressing the mouse without releasing it is effectively the same as calling grabMouse() .

mouseReleaseEvent() is called when a mouse button is released. A widget receives mouse release events when it has received the corresponding mouse press event. This means that if the user presses the mouse inside your widget, then drags the mouse somewhere else before releasing the mouse button, your widget receives the release event. There is one exception: if a popup menu appears while the mouse button is held down, this popup immediately steals the mouse events.

mouseDoubleClickEvent() is called when the user double-clicks in the widget. If the user double-clicks, the widget receives a mouse press event, a mouse release event, (a mouse click event,) a second mouse press, this event and finally a second mouse release event. (Some mouse move events may also be received if the mouse is not held steady during this operation.) It is not possible to distinguish a click from a double-click until the second click arrives. (This is one reason why most GUI books recommend that double-clicks be an extension of single-clicks, rather than trigger a different action.)

Widgets that accept keyboard input need to reimplement a few more event handlers:

keyPressEvent() is called whenever a key is pressed, and again when a key has been held down long enough for it to auto-repeat. The Tab and Shift+Tab keys are only passed to the widget if they are not used by the focus-change mechanisms. To force those keys to be processed by your widget, you must reimplement event() .

focusInEvent() is called when the widget gains keyboard focus (assuming you have called setFocusPolicy() ). Well-behaved widgets indicate that they own the keyboard focus in a clear but discreet way.

focusOutEvent() is called when the widget loses keyboard focus.

You may be required to also reimplement some of the less common event handlers:

mouseMoveEvent() is called whenever the mouse moves while a mouse button is held down. This can be useful during drag and drop operations. If you call setMouseTracking (true), you get mouse move events even when no buttons are held down. (See also the 拖放指南。)

keyReleaseEvent() is called whenever a key is released and while it is held down (if the key is auto-repeating). In that case, the widget will receive a pair of key release and key press event for every repeat. The Tab and Shift+Tab keys are only passed to the widget if they are not used by the focus-change mechanisms. To force those keys to be processed by your widget, you must reimplement event() .

wheelEvent() is called whenever the user turns the mouse wheel while the widget has the focus.

enterEvent() is called when the mouse enters the widget’s screen space. (This excludes screen space owned by any of the widget’s children.)

leaveEvent() is called when the mouse leaves the widget’s screen space. If the mouse enters a child widget it will not cause a leaveEvent() .

moveEvent() is called when the widget has been moved relative to its parent.

closeEvent() is called when the user closes the widget (or when close() is called).

There are also some rather obscure events described in the documentation for Type . To handle these events, you need to reimplement event() directly.

The default implementation of event() handles Tab and Shift+Tab (to move the keyboard focus), and passes on most of the other events to one of the more specialized handlers above.

Events and the mechanism used to deliver them are covered in 事件系统 .

函数和特性组 ¶

上下文

函数和特性

窗口函数

show() , hide() , raise() , lower() , close() .

顶层窗口

windowModified , windowTitle , windowIcon , isActiveWindow , activateWindow() , minimized , showMinimized() , maximized , showMaximized() , fullScreen , showFullScreen() , showNormal() .

窗口内容

update() , repaint() , scroll() .

几何体

pos , x() , y() , rect , size , width() , height() , move() , resize() , sizePolicy , sizeHint() , minimumSizeHint() , updateGeometry() , layout() , frameGeometry , geometry , childrenRect , childrenRegion , adjustSize() , mapFromGlobal() , mapToGlobal() , mapFromParent() , mapToParent() , maximumSize , minimumSize , sizeIncrement , baseSize , setFixedSize()

模式

visible , isVisibleTo() , enabled , isEnabledTo() , modal , isWindow() , mouseTracking , updatesEnabled , visibleRegion() .

外观和感觉

style() , setStyle() , styleSheet , cursor , font , palette , backgroundRole() , setBackgroundRole() , fontInfo() , fontMetrics() .

键盘聚焦函数

focus , focusPolicy , setFocus() , clearFocus() , setTabOrder() , setFocusProxy() , focusNextChild() , focusPreviousChild() .

鼠标和键盘抓取

grabMouse() , releaseMouse() , grabKeyboard() , releaseKeyboard() , mouseGrabber() , keyboardGrabber() .

事件处理程序

event() , mousePressEvent() , mouseReleaseEvent() , mouseDoubleClickEvent() , mouseMoveEvent() , keyPressEvent() , keyReleaseEvent() , focusInEvent() , focusOutEvent() , wheelEvent() , enterEvent() , leaveEvent() , paintEvent() , moveEvent() , resizeEvent() , closeEvent() , dragEnterEvent() , dragMoveEvent() , dragLeaveEvent() , dropEvent() , childEvent() , showEvent() , hideEvent() , customEvent() . changeEvent() ,

系统函数

parentWidget() , window() , setParent() , winId() , find() , metric() .

上下文菜单

contextMenuPolicy , contextMenuEvent() , customContextMenuRequested() , actions()

交互式帮助

setToolTip() , setWhatsThis()

Widget 样式表 ¶

除各平台的标准小部件样式外，Widget 还可以根据指定规则被样式化在样式表。此特征使您能够定制特定 Widget 外观，以向用户提供有关其目的的视觉暗示。例如，可以按特定方式样式化按钮，以指示它履行破坏性动作。

Widget 样式表用法的更详细描述在 Qt 样式表文档。

透明度和双缓冲 ¶

从 Qt 4.0 起， QWidget automatically double-buffers its painting, so there is no need to write double-buffering code in paintEvent() to avoid flicker.

Since Qt 4.1, the WA_ContentsPropagated widget attribute has been deprecated. Instead, the contents of parent widgets are propagated by default to each of their children as long as WA_PaintOnScreen 未设置。可以通过更新不规则区域 (以创建非矩形子级小部件) 或采用小于完整 Alpha 分量的颜色描绘来编写自定义 Widget 以利用此特征。以下简图展示如何微调自定义 Widget 的属性和特性来达成不同效果。

在以上简图中，构造移除区域的半透明矩形子级小部件并将其添加到父级 Widget ( QLabel 展示像素图)。然后，设置不同特性和 Widget 属性以达成不同效果：

左侧 Widget 没有设置额外特性或小部件属性。此默认状态适合大多数使用透明度的自定义 Widget，形状不规则 Widget 或采用透明笔刷描绘其整个区域的 Widget。

居中 Widget 拥有 autoFillBackground 设置特性。此特性用于依赖小部件提供默认背景的自定义 Widget，且采用透明笔刷在其整个区域进行描绘。

右侧 Widget 拥有 WA_OpaquePaintEvent widget attribute set. This indicates that the widget will paint over its entire area with opaque colors. The widget’s area will initially be uninitialized ，在简图中采用红色对角栅格图案表示 (透过重绘区域闪耀)。Qt::WA_OpaquePaintArea 属性对于需要快速描绘其自己的特定内容且不需要默认填充背景的 Widget 很有用。

要采用简单背景颜色快速更新自定义 Widget (譬如：实时绘图或图形化 Widget)，最好定义合适的背景颜色 (使用 setBackgroundRole() 采用 Window 角色)，设置 autoFillBackground property, and only implement the necessary drawing functionality in the widget’s paintEvent() .

To rapidly update custom widgets that constantly paint over their entire areas with opaque content, e.g., video streaming widgets, it is better to set the widget’s WA_OpaquePaintEvent , avoiding any unnecessary overhead associated with repainting the widget’s background.

若 Widget 拥有 WA_OpaquePaintEvent Widget 属性 and the autoFillBackground 设置特性， WA_OpaquePaintEvent 属性优先。根据要求，应选择它们之一。

从 Qt 4.1 起，父级 Widget 的内容还被传播给标准 Qt 小部件。若父级小部件以非标准方式装饰，这可能导致一些意外结果，如以下简图所示。

在不诉诸子类化的情况下，定制标准 Qt 小部件的描绘行为的作用域，可能略小于自定义 Widget 的作用域。通常，可以达成标准 Widget 期望的外观通过设置其 autoFillBackground 特性。

创建半透明窗口 ¶

从 Qt 4.5 起，在支持合成的窗口系统创建具有半透明区域的窗口是可能的。

要在顶层 Widget 启用此特征，设置其 WA_TranslucentBackground 属性采用 setAttribute() and ensure that its background is painted with non-opaque colors in the regions you want to be partially transparent.

平台注意事项：

X11：此特征依赖于支持 ARGB 视觉和合成窗口管理器的 X 服务器使用。

Windows：小部件需要拥有 FramelessWindowHint 设置窗口标志为半透明能工作。

本地 Widget vs 外来 Widget ¶

在 Qt 4.4 引入的外来 Widget 是窗口系统的未知小部件。它们没有关联它们的本机窗口句柄。此特征可显著提高小部件描绘、重置尺寸及移除闪烁的速度。

若要求采用本机窗口的旧行为，可以选择以下选项之一:

使用 QT_USE_NATIVE_WINDOWS=1 在环境中。

设置 AA_NativeWindows 应用程序属性。所有 Widget 将是本机小部件。

设置 WA_NativeWindow 小部件属性：小部件本身及其所有祖先将变为本机的 (除非 WA_DontCreateNativeAncestors 有设置)。

调用 winId 以强制本机窗口 (这隐含 3)。

设置 WA_PaintOnScreen 属性以强制本机窗口 (这隐含 3)。

另请参阅

QEvent QPainter QGridLayout QBoxLayout

class QWidget ( [ parent=None [ , f=Qt.WindowFlags() ] ] ) ¶

param f

WindowFlags

param parent

QWidget

构造子级 Widget 为 parent ，采用 Widget 设置标志 f .

若 parent is None ，新的 Widget 变为窗口。若 parent 是另一 Widget，此小部件变成子级窗口在 parent 。新的小部件被删除当其 parent 被删除。

Widget 标志自变量 f ，通常为 0，但可以将它设为定制窗口框架 (即 parent 必须是 None )。要定制框架，使用组成值来自按位 OR 的任何 window flags .

若将子级 Widget 添加到已经可见的小部件，必须明确展示子级以使其可见。

Note that the X11 version of Qt may not be able to deliver all combinations of style flags on all systems. This is because on X11, Qt can only ask the window manager, and the window manager can override the application’s settings. On Windows, Qt can set whatever flags you want.

另请参阅

windowFlags

PySide2.QtWidgets.QWidget. RenderFlag ¶

此枚举描述如何渲染 Widget 当调用 render() .

常量	描述
QWidget.DrawWindowBackground	If you enable this option, the widget’s background is rendered into the target even if `autoFillBackground` 未设置。默认情况下，此选项是启用的。
QWidget.DrawChildren	If you enable this option, the widget’s children are rendered recursively into the target. By default, this option is enabled.
QWidget.IgnoreMask	若启用此选项，Widget 的 `mask()` is ignored when rendering into the target. By default, this option is disabled.

PySide2.QtWidgets.QWidget. acceptDrops ( ) ¶

返回类型: bool

另请参阅

setAcceptDrops()

PySide2.QtWidgets.QWidget. accessibleDescription ( ) ¶

返回类型: unicode

另请参阅

setAccessibleDescription()

PySide2.QtWidgets.QWidget. accessibleName ( ) ¶

返回类型: unicode

另请参阅

setAccessibleName()

PySide2.QtWidgets.QWidget. actionEvent ( event ) ¶

参数: event – QActionEvent

此事件处理程序被调用采用给定 event whenever the widget’s actions are changed.

另请参阅

addAction() insertAction() removeAction() actions() QActionEvent

PySide2.QtWidgets.QWidget. actions ( ) ¶

返回类型

返回此 Widget 的动作列表 (可能为空)。

另请参阅

contextMenuPolicy insertAction() removeAction()

PySide2.QtWidgets.QWidget. activateWindow ( ) ¶

把包含此 Widget 的顶层 Widget，设为活动窗口。

活动窗口是具有键盘输入聚焦的可见顶层窗口。

此函数履行如在顶层窗口的标题栏上，点击鼠标的相同操作。在 X11，结果取决于窗口管理器。若想要确保窗口堆叠在顶部，同样，还应调用 raise() . Note that the window must be visible, otherwise has no effect.

在 Windows，若在应用程序目前不是活动窗口时调用这，则不会使其成为活动窗口。它会改变任务栏条目的颜色，以指示窗口在某些方面有变化。这是因为 Microsoft 不允许应用程序，去中断用户在另一应用程序中目前正做的。

另请参阅

isActiveWindow() window() show() setWindowActivationBehavior()

PySide2.QtWidgets.QWidget. addAction ( action ) ¶

参数: action – QAction

追加动作 action 到此 Widget 的动作列表。

所有 QWidget 都有列表，针对 QAction ，无论如何，可以按多种不同方式图形表示它们。默认使用 QAction 列表 (返回通过 actions() ) is to create a context QMenu .

A QWidget 只应每动作有一个，且已添加动作不会导致同一动作在 Widget 中出现两次。

The ownership of action 不会被转移给此 QWidget .

另请参阅

removeAction() insertAction() actions() QMenu

PySide2.QtWidgets.QWidget. addActions ( actions ) ¶

参数: actions –

追加动作 actions 到此 Widget 的动作列表。

另请参阅

removeAction() QMenu addAction()

PySide2.QtWidgets.QWidget. adjustSize ( ) ¶

调整 Widget 大小，以拟合其内容。

此函数使用 sizeHint() if it is valid, i.e., the size hint’s width and height are >= 0. Otherwise, it sets the size to the children rectangle that covers all child widgets (the union of all child widget rectangles).

For windows, the screen size is also taken into account. If the sizeHint() is less than (200, 100) and the size policy is expanding , the window will be at least (200, 100). The maximum size of a window is 2/3 of the screen’s width and height.

另请参阅

sizeHint() childrenRect()

PySide2.QtWidgets.QWidget. autoFillBackground ( ) ¶

返回类型: bool

另请参阅

setAutoFillBackground()

PySide2.QtWidgets.QWidget. backgroundRole ( ) ¶

返回类型: ColorRole

返回 Widget 的背景角色。

The background role defines the brush from the widget’s palette that is used to render the background.

If no explicit background role is set, the widget inherts its parent widget’s background role.

另请参阅

setBackgroundRole() foregroundRole()

PySide2.QtWidgets.QWidget. backingStore ( ) ¶

返回类型: QBackingStore

返回 QBackingStore this widget will be drawn into.

PySide2.QtWidgets.QWidget. baseSize ( ) ¶

返回类型: QSize

另请参阅

setBaseSize()

PySide2.QtWidgets.QWidget. changeEvent ( event ) ¶

参数: event – QEvent

此事件处理程序可以被重实现以处理状态改变。

在此事件中改变的状态可以被检索透过 event 供给。

改变事件包括： ToolBarChange , ActivationChange , EnabledChange , FontChange , StyleChange , PaletteChange , WindowTitleChange , IconTextChange , ModifiedChange , MouseTrackingChange , ParentChange , WindowStateChange , LanguageChange , LocaleChange , LayoutDirectionChange , ReadOnlyChange .

PySide2.QtWidgets.QWidget. childAt ( x , y ) ¶

参数

x – int
y – int

返回类型

QWidget

Returns the visible child widget at the position ( x , y ) in the widget’s coordinate system. If there is no visible child widget at the specified position, the function returns None .

PySide2.QtWidgets.QWidget. childAt ( p ) ¶

参数: p – QPoint
返回类型: QWidget

这是重载函数。

Returns the visible child widget at point p in the widget’s own coordinate system.

PySide2.QtWidgets.QWidget. childrenRect ( ) ¶

返回类型: QRect

PySide2.QtWidgets.QWidget. childrenRegion ( ) ¶

返回类型: QRegion

PySide2.QtWidgets.QWidget. clearFocus ( ) ¶

从 Widget 获取键盘输入聚焦。

若 Widget 有活动聚焦， focus out event 被发送给此 Widget 以告诉它已丢失聚焦。

此 Widget 必须启用聚焦设置以获取键盘输入聚焦，即：它必须调用 setFocusPolicy() .

另请参阅

hasFocus() setFocus() focusInEvent() focusOutEvent() setFocusPolicy() focusWidget()

PySide2.QtWidgets.QWidget. clearMask ( ) ¶: 移除任何遮罩设置通过 setMask() .

另请参阅

setMask()

PySide2.QtWidgets.QWidget. close ( ) ¶

返回类型: bool

关闭此 Widget。返回 true 若 Widget 被关闭；否则返回 false .

首先，它向 Widget 发送 QCloseEvent 。小部件 hidden 若它 accepts 关闭事件。若它 ignores 事件，什么都不发生。默认实现的 closeEvent() accepts the close event.

若 Widget 拥有 WA_DeleteOnClose 标志，小部件也被删除。关闭事件会被交付给 Widget 无论小部件是否可见。

lastWindowClosed() signal is emitted when the last visible primary window (i.e. window with no parent) with the WA_QuitOnClose 属性设置被关闭。默认情况下，除过渡窗口 (譬如：闪屏、工具窗口及弹出菜单) 外，所有 Widget 都有设置此属性。

PySide2.QtWidgets.QWidget. closeEvent ( event ) ¶

参数: event – QCloseEvent

此事件处理程序被调用采用给定 event when Qt receives a window close request for a top-level widget from the window system.

By default, the event is accepted and the widget is closed. You can reimplement this function to change the way the widget responds to window close requests. For example, you can prevent the window from closing by calling ignore() on all events.

Main window applications typically use reimplementations of this function to check whether the user’s work has been saved and ask for permission before closing. For example, the 应用程序范例 uses a helper function to determine whether or not to close the window:

												def closeEvent(self, event):
    if maybeSave():
        writeSettings()
        event.accept()
    else:
        event.ignore()
												
											

另请参阅

event() hide() close() QCloseEvent 应用程序范例

PySide2.QtWidgets.QWidget. contentsMargins ( ) ¶

返回类型: QMargins

The function returns the widget’s contents margins.

另请参阅

setContentsMargins() contentsRect()

PySide2.QtWidgets.QWidget. contentsRect ( ) ¶

返回类型: QRect

Returns the area inside the widget’s margins.

另请参阅

setContentsMargins() contentsMargins()

PySide2.QtWidgets.QWidget. contextMenuEvent ( event ) ¶

参数: event – QContextMenuEvent

此事件处理程序，对于事件 event ，可以在子类中被重实现以接收 Widget 上下文菜单事件。

The handler is called when the widget’s contextMenuPolicy is DefaultContextMenu .

默认实现忽略上下文事件。见 QContextMenuEvent 文档编制了解更多细节。

另请参阅

event() QContextMenuEvent customContextMenuRequested()

PySide2.QtWidgets.QWidget. contextMenuPolicy ( ) ¶

返回类型: ContextMenuPolicy

另请参阅

setContextMenuPolicy()

PySide2.QtWidgets.QWidget. create ( [ arg__1=0 [ , initializeWindow=true [ , destroyOldWindow=true ] ] ] ) ¶

参数

arg__1 – WId
initializeWindow – bool
destroyOldWindow – bool

创建新 Widget 窗口。

参数 window , initializeWindow ，和 destroyOldWindow 被忽略，在 Qt 5。请使用 fromWinId() to create a QWindow 包裹外来窗口并把它传递给 createWindowContainer() 代替。

另请参阅

createWindowContainer() fromWinId()

PySide2.QtWidgets.QWidget. createWinId ( ) ¶: Ensures that the widget has a window system identifier, i.e. that it is known to the windowing system.

static PySide2.QtWidgets.QWidget. createWindowContainer ( window [ , parent=None [ , flags=Qt.WindowFlags() ] ] ) ¶

参数

window – QWindow
parent – QWidget
flags – WindowFlags

返回类型

QWidget

创建 QWidget 使之可能嵌入 window 成 QWidget 基应用程序。

窗口容器被创建作为子级对于 parent 和采用窗口标志 flags .

Once the window has been embedded into the container, the container will control the window’s geometry and visibility. Explicit calls to setGeometry() , show() or hide() on an embedded window is not recommended.

容器拥有所有权对于 window 。窗口可以从窗口容器中被移除采用调用 setParent() .

The window container is attached as a native child window to the toplevel window it is a child of. When a window container is used as a child of a QAbstractScrollArea or QMdiArea , it will create a native window for every widget in its parent chain to allow for proper stacking and clipping in this use case. Creating a native window for the window container also allows for proper stacking and clipping. This must be done before showing the window container. Applications with many native child windows may suffer from performance issues.

窗口容器有许多已知局限性：

Stacking order; The embedded window will stack on top of the widget hierarchy as an opaque box. The stacking order of multiple overlapping window container instances is undefined.
渲染集成；窗口容器无法互操作与 QGraphicsProxyWidget , render() or similar functionality.
Focus Handling; It is possible to let the window container instance have any focus policy and it will delegate focus to the window via a call to requestActivate() . However, returning to the normal focus chain from the QWindow instance will be up to the QWindow instance implementation itself. For instance, when entering a Qt Quick based window with tab focus, it is quite likely that further tab presses will only cycle inside the QML application. Also, whether requestActivate() actually gives the window focus, is platform dependent.
使用多个窗口容器实例在 QWidget 基应用程序会大大损害应用程序的整体性能。

PySide2.QtWidgets.QWidget. cursor ( ) ¶

返回类型: QCursor

另请参阅

setCursor()

PySide2.QtWidgets.QWidget. customContextMenuRequested ( pos ) ¶

参数: pos – QPoint

PySide2.QtWidgets.QWidget. destroy ( [ destroyWindow=true [ , destroySubWindows=true ] ] ) ¶

参数

destroyWindow – bool
destroySubWindows – bool

释放窗口系统资源。销毁 Widget 窗口，若 destroyWindow 为 true。

calls itself recursively for all the child widgets, passing destroySubWindows 为 destroyWindow 参数。要更好地控制 Subwidget 的销毁，请先选择性地销毁 Subwidget。

此函数通常被调用从 QWidget 析构函数。

PySide2.QtWidgets.QWidget. dragEnterEvent ( event ) ¶

参数: event – QDragEnterEvent

此事件处理程序被调用当拖拽正在进行中且鼠标进入此 Widget 时。事件被传入 event 参数。

If the event is ignored, the widget won’t receive any drag move events .

见拖放文档编制了解如何为应用程序提供拖放的概述。

另请参阅

QDrag QDragEnterEvent

PySide2.QtWidgets.QWidget. dragLeaveEvent ( event ) ¶

参数: event – QDragLeaveEvent

此事件处理程序被调用当拖拽正在进行中且鼠标离开此 Widget 时。事件被传入 event 参数。

见拖放文档编制了解如何为应用程序提供拖放的概述。

另请参阅

QDrag QDragLeaveEvent

PySide2.QtWidgets.QWidget. dragMoveEvent ( event ) ¶

参数: event – QDragMoveEvent

此事件处理程序被调用若拖拽正在进行中且发生以下任一条件：光标进入此 Widget、光标在此 Widget 内移动、若按下键盘修饰键当此 Widget 获得聚焦时。事件被传入 event 参数。

见拖放文档编制了解如何为应用程序提供拖放的概述。

另请参阅

QDrag QDragMoveEvent

PySide2.QtWidgets.QWidget. dropEvent ( event ) ¶

参数: event – QDropEvent

此事件处理程序被调用当拖拽掉落在此 Widget 上时。事件被传入 event 参数。

见拖放文档编制了解如何为应用程序提供拖放的概述。

另请参阅

QDrag QDropEvent

PySide2.QtWidgets.QWidget. effectiveWinId ( ) ¶

返回类型: WId

Returns the effective window system identifier of the widget, i.e. the native parent’s window system identifier.

若 Widget 是本机的，此函数返回本机小部件 ID。否则，返回首个本机父级 Widget (即：包含此 Widget 的顶层小部件) 的窗口 ID。

注意

推荐不要存储此值，因为运行时它可能改变。

另请参阅

nativeParentWidget()

PySide2.QtWidgets.QWidget. ensurePolished ( ) ¶

确保 Widget 及其子级已被抛光，通过 QStyle (即：拥有恰当的字体和调色板)。

QWidget calls this function after it has been fully constructed but before it is shown the very first time. You can call this function if you want to ensure that the widget is polished before doing an operation, e.g., the correct font size might be needed in the widget’s sizeHint() reimplementation. Note that this function is 调用自默认实现的 sizeHint() .

抛光对必须在调用所有构造函数 (来自基类及子类) 之后的最终初始化很有用。

若需要改变某些设置当抛光 Widget 时，重实现 event() and handle the 波兰语 事件类型。

注意

函数被声明为 const 以便可以从其它 const 函数中调用它 (如 sizeHint() ).

另请参阅

event()

PySide2.QtWidgets.QWidget. enterEvent ( event ) ¶

参数: event – QEvent

此事件处理程序可以在子类中被重实现以接收 Widget 进入事件，当传入 event 参数。

事件被发送给 Widget，当鼠标光标进入 Widget 时。

另请参阅

leaveEvent() mouseMoveEvent() event()

static PySide2.QtWidgets.QWidget. find ( arg__1 ) ¶

参数: arg__1 – WId
返回类型: QWidget

返回指向 Widget 的指针，采用窗口标识符/句柄 id .

窗口标识符类型取决于底层窗口系统，见 qwindowdefs.h 实际定义。若没有带此标识符的 Widget， None 被返回。

PySide2.QtWidgets.QWidget. focusInEvent ( event ) ¶

参数: event – QFocusEvent

此事件处理程序可以在子类中被重实现，以接收 Widget 的键盘聚焦事件 (聚焦接收)。事件被传入 event 参数

Widget 通常必须 setFocusPolicy() to something other than NoFocus 为接收聚焦事件 (注意：应用程序程序员可以调用 setFocus() on any widget, even those that do not normally accept focus.)

默认实现更新 Widget (除了窗口未指定 focusPolicy() ).

另请参阅

focusOutEvent() setFocusPolicy() keyPressEvent() keyReleaseEvent() event() QFocusEvent

PySide2.QtWidgets.QWidget. focusNextChild ( ) ¶

返回类型: bool

Finds a new widget to give the keyboard focus to, as appropriate for Tab, and returns true if it can find a new widget, or false if it can’t.

另请参阅

focusPreviousChild()

PySide2.QtWidgets.QWidget. focusNextPrevChild ( next ) ¶

参数: next – bool
返回类型: bool

查找新的 Widget 以给予键盘聚焦，如适合 Tab 和 Shift+Tab，并返回 true if it can find a new widget, or false if it can’t.

若 next 为 true，此函数向前搜索，若 next 为 False，向后搜索。

Sometimes, you will want to reimplement this function. For example, a web browser might reimplement it to move its “current active link” forward or backward, and call only when it reaches the last or first link on the “page”.

Child widgets call on their parent widgets, but only the window that contains the child widgets decides where to redirect focus. By reimplementing this function for an object, you thus gain control of focus traversal for all child widgets.

另请参阅

focusNextChild() focusPreviousChild()

PySide2.QtWidgets.QWidget. focusOutEvent ( event ) ¶

参数: event – QFocusEvent

此事件处理程序可以在子类中被重实现，以接收 Widget 的键盘聚焦事件 (聚焦丢失)。事件被传入 event 参数。

默认实现更新 Widget (除了窗口未指定 focusPolicy() ).

另请参阅

focusInEvent() setFocusPolicy() keyPressEvent() keyReleaseEvent() event() QFocusEvent

PySide2.QtWidgets.QWidget. focusPolicy ( ) ¶

返回类型: FocusPolicy

另请参阅

setFocusPolicy()

PySide2.QtWidgets.QWidget. focusPreviousChild ( ) ¶

返回类型: bool

Finds a new widget to give the keyboard focus to, as appropriate for Shift+Tab, and returns true if it can find a new widget, or false if it can’t.

另请参阅

focusNextChild()

PySide2.QtWidgets.QWidget. focusProxy ( ) ¶

返回类型: QWidget

返回聚焦代理，或 None 若没有聚焦代理。

另请参阅

setFocusProxy()

PySide2.QtWidgets.QWidget. focusWidget ( ) ¶

返回类型: QWidget

返回最后子级当此小部件 setFocus 被调用。对于顶层 Widget，这是窗口被激活的情况下获得聚焦的小部件

这不同于 focusWidget() , which returns the focus widget in the currently active window.

PySide2.QtWidgets.QWidget. font ( ) ¶

返回类型: QFont

另请参阅

setFont()

PySide2.QtWidgets.QWidget. fontInfo ( ) ¶

返回类型: QFontInfo

Returns the font info for the widget’s current font. Equivalent to QFontInfo(widget->font()) .

另请参阅

font() fontMetrics() setFont()

PySide2.QtWidgets.QWidget. fontMetrics ( ) ¶

返回类型: QFontMetrics

Returns the font metrics for the widget’s current font. Equivalent to QFontMetrics(widget->font()) .

另请参阅

font() fontInfo() setFont()

PySide2.QtWidgets.QWidget. foregroundRole ( ) ¶

返回类型: ColorRole

返回前景角色。

The foreground role defines the color from the widget’s palette 用于绘制前景。

若未明确设置前景角色，函数返回对比后台角色的角色。

另请参阅

setForegroundRole() backgroundRole()

PySide2.QtWidgets.QWidget. frameGeometry ( ) ¶

返回类型: QRect

PySide2.QtWidgets.QWidget. frameSize ( ) ¶

返回类型: QSize

PySide2.QtWidgets.QWidget. geometry ( ) ¶

返回类型: QRect

另请参阅

setGeometry()

PySide2.QtWidgets.QWidget. getContentsMargins ( ) ¶

注意

此函数被弃用。

使用 contentsMargins() .

Returns the widget’s contents margins for left , top , right ，和 bottom .

另请参阅

setContentsMargins() contentsRect()

PySide2.QtWidgets.QWidget. grab ( [ rectangle=QRect(QPoint(0 , 0) , QSize(-1 , -1)) ] ) ¶

参数: rectangle – QRect
返回类型: QPixmap

把 Widget 渲染成像素图，限定通过给定 rectangle 。若 Widget 有任何子级，它们也会被描绘在适当位置。

若矩形具有无效指定尺寸 (默认)，整个 Widget 被描绘。

另请参阅

render() QPixmap

PySide2.QtWidgets.QWidget. grabGesture ( type [ , flags=Qt.GestureFlags() ] ) ¶

参数

type – GestureType
flags – GestureFlags

将 Widget 订阅到给定 gesture 采有特定 flags .

另请参阅

ungrabGesture() QGestureEvent

PySide2.QtWidgets.QWidget. grabKeyboard ( ) ¶

抓取键盘输入。

此 Widget 接收所有键盘事件直到 releaseKeyboard() is called; other widgets get no keyboard events at all. Mouse events are not affected. Use grabMouse() if you want to grab that.

The focus widget is not affected, except that it doesn’t receive any keyboard events. setFocus() moves the focus as usual, but the new focus widget receives keyboard events only after releaseKeyboard() 被调用。

If a different widget is currently grabbing keyboard input, that widget’s grab is released first.

另请参阅

releaseKeyboard() grabMouse() releaseMouse() focusWidget()

PySide2.QtWidgets.QWidget. grabMouse ( arg__1 ) ¶

参数: arg__1 – QCursor

此函数重载 grabMouse() .

抓取鼠标输入和改变光标形状。

光标会假定形状 cursor (对于只要鼠标聚焦被抓住) 且此 Widget 将是接收鼠标事件的唯一小部件直到 releaseMouse() is called().

警告

抓取鼠标可能锁定终端。

注意

见注意事项在 grabMouse() .

另请参阅

releaseMouse() grabKeyboard() releaseKeyboard() setCursor()

PySide2.QtWidgets.QWidget. grabMouse ( ) ¶

抓取鼠标输入。

此 Widget 接收所有鼠标事件直到 releaseMouse() is called; other widgets get no mouse events at all. Keyboard events are not affected. Use grabKeyboard() if you want to grab that.

警告

以鼠标抓取应用程序的 Bug 会经常锁定终端。使用此函数要极其谨慎，并考虑使用 -nograb 命令行选项当调试时。

抓取鼠标几乎从不是必要的当使用 Qt 时，因为 Qt 会明智地抓取和释放鼠标。特别是，当鼠标按钮被按下时，Qt 抓住鼠标并保持它直到最后一个按钮被释放。

注意

仅可见 Widget 可以抓取鼠标输入。若 isVisible() 返回 false for a widget, that widget cannot call .

注意

On Windows, only works when the mouse is inside a window owned by the process. On macOS, only works when the mouse is inside the frame of that widget.

另请参阅

releaseMouse() grabKeyboard() releaseKeyboard()

PySide2.QtWidgets.QWidget. grabShortcut ( key [ , context=Qt.WindowShortcut ] ) ¶

参数

key – QKeySequence
context – ShortcutContext

返回类型

int

Adds a shortcut to Qt’s shortcut system that watches for the given key 序列在给定 context 。若 context is ApplicationShortcut ，快捷方式适用于整个应用程序。否则，要么本地到此 Widget， WidgetShortcut ，或到窗口本身， WindowShortcut .

若相同 key 序列有被几个 Widget 所抓取，当 key 序列发生 Shortcut event is sent to all the widgets to which it applies in a non-deterministic order, but with the ``ambiguous’’ flag set to true.

警告

通常不需要使用此函数；而是创建 QAction s with the shortcut key sequences you require (if you also want equivalent menu options and toolbar buttons), or create QShortcut s if you just need key sequences. Both QAction and QShortcut handle all the event filtering for you, and provide signals which are triggered when the user triggers the key sequence, so are much easier to use than this low-level function.

另请参阅

releaseShortcut() setShortcutEnabled()

PySide2.QtWidgets.QWidget. graphicsEffect ( ) ¶

返回类型: QGraphicsEffect

The function returns a pointer to the widget’s graphics effect.

若 Widget 没有图形效果， None 被返回。

另请参阅

setGraphicsEffect()

PySide2.QtWidgets.QWidget. graphicsProxyWidget ( ) ¶

返回类型: QGraphicsProxyWidget

返回在图形视图中相应嵌入 Widget 的代理小部件；否则返回 None .

另请参阅

createProxyForChildWidget() addWidget()

PySide2.QtWidgets.QWidget. hasFocus ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. hasHeightForWidth ( ) ¶

返回类型: bool

返回 true if the widget’s preferred height depends on its width; otherwise returns false .

PySide2.QtWidgets.QWidget. hasMouseTracking ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. hasTabletTracking ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. heightForWidth ( arg__1 ) ¶

参数: arg__1 – int
返回类型: int

返回此 Widget 的首选高度，给定宽度 w .

If this widget has a layout, the default implementation returns the layout’s preferred height. if there is no layout, the default implementation returns -1 indicating that the preferred height does not depend on the width.

PySide2.QtWidgets.QWidget. hide ( ) ¶: 隐藏 Widget。此函数相当于 setVisible (false).

注意

If you are working with QDialog or its subclasses and you invoke the show() function after this function, the dialog will be displayed in its original position.

另请参阅

hideEvent() isHidden() show() setVisible() isVisible() close()

PySide2.QtWidgets.QWidget. hideEvent ( event ) ¶

参数: event – QHideEvent

此事件处理程序可以在子类中被重实现以接收 Widget 隐藏事件。事件被传入 event 参数。

隐藏事件被立即发送给 Widget 在它们被隐藏后。

注意：Widget 接收自发展示和隐藏事件当通过窗口系统改变其映射状态时，如：自发隐藏事件当用户最小化窗口时，和自发展示事件当窗口被再次还原时。在接收自发隐藏事件之后仍然认为 Widget 是可见的，在意识到 isVisible() .

另请参阅

visible event() QHideEvent

PySide2.QtWidgets.QWidget. inputMethodEvent ( event ) ¶

参数: event – QInputMethodEvent

此事件处理程序，对于事件 event ，可以在子类中重实现以接收输入法合成事件。处理程序被调用，当输入法状态改变时。

注意：当创建自定义文本编辑 Widget 时， WA_InputMethodEnabled 窗口属性必须被明确设置 (使用 setAttribute() function) in order to receive input method events.

默认实现调用 event->ignore()，拒绝输入法事件。见 QInputMethodEvent 文档编制了解更多细节。

另请参阅

event() QInputMethodEvent

PySide2.QtWidgets.QWidget. inputMethodHints ( ) ¶

返回类型: InputMethodHints

另请参阅

setInputMethodHints()

PySide2.QtWidgets.QWidget. inputMethodQuery ( arg__1 ) ¶

参数: arg__1 – InputMethodQuery
返回类型: object

此方法仅与输入 Widget 相关。输入法使用它查询 Widget 的一组属性，以便能够支持为支持围绕文本和再转换的复杂输入法操作。

query 指定要查询的特性。

另请参阅

inputMethodEvent() QInputMethodEvent QInputMethodQueryEvent inputMethodHints

PySide2.QtWidgets.QWidget. insertAction ( before , action ) ¶

参数

before – QAction
action – QAction

插入动作 action to this widget’s list of actions, before the action before 。它追加动作，若 before is None or before 不是有效动作 (对于此 Widget)。

A QWidget 每动作只应有一个。

另请参阅

removeAction() addAction() QMenu contextMenuPolicy actions()

PySide2.QtWidgets.QWidget. insertActions ( before , actions ) ¶

参数

before – QAction
actions –

插入动作 actions to this widget’s list of actions, before the action before 。它追加动作，若 before is None or before 不是有效动作 (对于此 Widget)。

A QWidget 每动作最多能有一个。

另请参阅

removeAction() QMenu insertAction() contextMenuPolicy

PySide2.QtWidgets.QWidget. internalWinId ( ) ¶

返回类型: WId

PySide2.QtWidgets.QWidget. isActiveWindow ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isAncestorOf ( child ) ¶

参数: child – QWidget
返回类型: bool

返回 true 若此 Widget 是父级 (或祖父级等任何级别)，针对给定 child ，且两 Widget 在同一窗口；否则返回 false .

PySide2.QtWidgets.QWidget. isEnabled ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isEnabledTo ( arg__1 ) ¶

参数: arg__1 – QWidget
返回类型: bool

返回 true 若此 Widget 将变为被启用，若 ancestor 被启用；否则返回 false .

就是这种情况若不是 Widget 本身或每个父级直到，但排除 ancestor 已被明确禁用。

returns false if this widget or any if its ancestors was explicitly disabled.

这里的祖先一词是指在相同窗口中的父级 Widget。

Therefore (0) stops at this widget’s window, unlike isEnabled() which also takes parent windows into considerations.

另请参阅

setEnabled() enabled

PySide2.QtWidgets.QWidget. isEnabledToTLW ( ) ¶

返回类型: bool

注意

此函数被弃用。

This function is deprecated. It is equivalent to isEnabled()

PySide2.QtWidgets.QWidget. isFullScreen ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isHidden ( ) ¶

返回类型: bool

返回 true 若 Widget 被隐藏，否则返回 false .

隐藏 Widget 才变为可见当 show() is called on it. It will not be automatically shown when the parent is shown.

要校验可见性，使用 ! isVisible() instead (notice the exclamation mark).

implies ! isVisible() , but a widget can be not visible and not hidden at the same time. This is the case for widgets that are children of widgets that are not visible.

Widget 被隐藏若：

它们被创建作为独立窗口，
它们是作为可见 Widget 子级创建的，
hide() or setVisible (false) 被调用。

PySide2.QtWidgets.QWidget. isLeftToRight ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isMaximized ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isMinimized ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isModal ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isRightToLeft ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isTopLevel ( ) ¶

返回类型: bool

使用 isWindow() 代替。

PySide2.QtWidgets.QWidget. isVisible ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. isVisibleTo ( arg__1 ) ¶

参数: arg__1 – QWidget
返回类型: bool

返回 true 当此 Widget 变为可见若 ancestor 被展示；否则返回 false .

true 情况发生若 Widget 本身或任何父级直到但排除 ancestor 已被明确隐藏。

此函数仍将返回 true，若 Widget 被其它屏幕窗口遮挡，但可以是物理可见的，若它或它们要被移动。

is identical to isVisible() .

另请参阅

show() hide() isVisible()

PySide2.QtWidgets.QWidget. isWindow ( ) ¶

返回类型: bool

返回 true 若 Widget 是独立窗口，否则返回 false .

A window is a widget that isn’t visually the child of any other widget and that usually has a frame and a window title .

窗口可以拥有 parent widget 。那么，它将与其父级被分组在一起和被删除当父级被删除时，它将最小化当父级被最小化时，等。若窗口管理器支持，它还拥有如其父级的常见任务栏条目。

QDialog and QMainWindow Widget 默认是窗口，即使在构造函数中有指定父级 Widget。此行为的指定通过 Window 标志。

另请参阅

window() isModal() parentWidget()

PySide2.QtWidgets.QWidget. isWindowModified ( ) ¶

返回类型: bool

PySide2.QtWidgets.QWidget. keyPressEvent ( event ) ¶

参数: event – QKeyEvent

此事件处理程序，对于事件 event ，可以在子类中重实现以接收 Widget 的按键事件。

Widget 必须调用 setFocusPolicy() to accept focus initially and have focus in order to receive a key press event.

若重实现此处理程序，则调用基类实现很重要若按键不行动。

默认实现关闭弹出 Widget 若用户按下键序列 Cancel (typically the Escape key). Otherwise the event is ignored, so that the widget’s parent can interpret it.

注意： QKeyEvent 开始采用 isAccepted() == true，因此不需要调用 accept() - just do not call the base class implementation if you act upon the key.

另请参阅

keyReleaseEvent() setFocusPolicy() focusInEvent() focusOutEvent() event() QKeyEvent 俄罗斯方块范例

PySide2.QtWidgets.QWidget. keyReleaseEvent ( event ) ¶

参数: event – QKeyEvent

此事件处理程序，对于事件 event ，可以在子类中被重实现以接收 Widget 按键释放事件。

Widget 必须 accept focus 初始和 have focus 为接收键释放事件。

若重实现此处理程序，则调用基类实现很重要若按键不行动。

The default implementation ignores the event, so that the widget’s parent can interpret it.

注意： QKeyEvent 开始采用 isAccepted() == true，因此不需要调用 accept() - just do not call the base class implementation if you act upon the key.

另请参阅

keyPressEvent() ignore() setFocusPolicy() focusInEvent() focusOutEvent() event() QKeyEvent

static PySide2.QtWidgets.QWidget. keyboardGrabber ( ) ¶

返回类型: QWidget

返回目前正抓取键盘输入的 Widget。

若在此应用程序中目前没有 Widget 正抓取键盘， None 被返回。

另请参阅

grabMouse() mouseGrabber()

PySide2.QtWidgets.QWidget. layout ( ) ¶

返回类型: QLayout

返回安装在此 Widget 上的布局管理器，或 None 若未安装布局管理器。

The layout manager sets the geometry of the widget’s children that have been added to the layout.

另请参阅

setLayout() sizePolicy() 布局管理

PySide2.QtWidgets.QWidget. layoutDirection ( ) ¶

返回类型: LayoutDirection

另请参阅

setLayoutDirection()

PySide2.QtWidgets.QWidget. leaveEvent ( event ) ¶

参数: event – QEvent

此事件处理程序可以在子类中被重实现以接收 Widget 离开事件，当传入 event 参数。

离开事件被发送给 Widget 当鼠标光标离开 Widget 时。

另请参阅

enterEvent() mouseMoveEvent() event()

PySide2.QtWidgets.QWidget. locale ( ) ¶

返回类型: QLocale

另请参阅

setLocale()

PySide2.QtWidgets.QWidget. lower ( ) ¶

Lowers the widget to the bottom of the parent widget’s stack.

在此调用之后，Widget 将在视觉上位于 (且因此被遮盖由) 任何重叠同级小部件后面。

另请参阅

raise() stackUnder()

PySide2.QtWidgets.QWidget. mapFrom ( arg__1 , arg__2 ) ¶

参数

arg__1 – QWidget
arg__2 – QPoint

返回类型

QPoint

翻译 Widget 坐标 pos 从坐标系统为 parent to this widget’s coordinate system. The parent 必须不是 None 且必须是调用 Widget 的父级。

另请参阅

mapTo() mapFromParent() mapFromGlobal() underMouse()

PySide2.QtWidgets.QWidget. mapFromGlobal ( arg__1 ) ¶

参数: arg__1 – QPoint
返回类型: QPoint

翻译全局屏幕坐标 pos 到 Widget 坐标。

另请参阅

mapToGlobal() mapFrom() mapFromParent()

PySide2.QtWidgets.QWidget. mapFromParent ( arg__1 ) ¶

参数: arg__1 – QPoint
返回类型: QPoint

翻译父级 Widget 坐标 pos 到 Widget 坐标。

如同 mapFromGlobal() if the widget has no parent.

另请参阅

mapToParent() mapFrom() mapFromGlobal() underMouse()

PySide2.QtWidgets.QWidget. mapTo ( arg__1 , arg__2 ) ¶

参数

arg__1 – QWidget
arg__2 – QPoint

返回类型

QPoint

翻译 Widget 坐标 pos 到坐标系统为 parent 。 parent 必须不是 None 且必须是调用 Widget 的父级。

另请参阅

mapFrom() mapToParent() mapToGlobal() underMouse()

PySide2.QtWidgets.QWidget. mapToGlobal ( arg__1 ) ¶

参数: arg__1 – QPoint
返回类型: QPoint

翻译 Widget 坐标 pos 到全局屏幕坐标。例如： mapToGlobal(QPoint(0,0)) 将给出 Widget 左上像素的全局坐标。

另请参阅

mapFromGlobal() mapTo() mapToParent()

PySide2.QtWidgets.QWidget. mapToParent ( arg__1 ) ¶

参数: arg__1 – QPoint
返回类型: QPoint

翻译 Widget 坐标 pos 到父级 Widget 坐标。

如同 mapToGlobal() if the widget has no parent.

另请参阅

mapFromParent() mapTo() mapToGlobal() underMouse()

PySide2.QtWidgets.QWidget. mask ( ) ¶

返回类型: QRegion

返回在 Widget 上目前设置的遮罩。若未设置遮罩，返回值会是空区域。

另请参阅

setMask() clearMask() isEmpty() 异形时钟范例

PySide2.QtWidgets.QWidget. maximumHeight ( ) ¶

返回类型: int

另请参阅

setMaximumHeight()

PySide2.QtWidgets.QWidget. maximumSize ( ) ¶

返回类型: QSize

另请参阅

setMaximumSize()

PySide2.QtWidgets.QWidget. maximumWidth ( ) ¶

返回类型: int

另请参阅

setMaximumWidth()

PySide2.QtWidgets.QWidget. minimumHeight ( ) ¶

返回类型: int

另请参阅

setMinimumHeight()

PySide2.QtWidgets.QWidget. minimumSize ( ) ¶

返回类型: QSize

另请参阅

setMinimumSize()

PySide2.QtWidgets.QWidget. minimumSizeHint ( ) ¶

返回类型: QSize

PySide2.QtWidgets.QWidget. minimumWidth ( ) ¶

返回类型: int

另请参阅

setMinimumWidth()

PySide2.QtWidgets.QWidget. mouseDoubleClickEvent ( event ) ¶

参数: event – QMouseEvent

此事件处理程序，对于事件 event ，可以在子类中重实现以接收 Widget 的鼠标双击事件。

默认实现调用 mousePressEvent() .

注意

The widget will also receive mouse press and mouse release events in addition to the double click event. And if another widget that overlaps this widget disappears in response to press or release events, then this widget will only receive the double click event. It is up to the developer to ensure that the application interprets these events correctly.

另请参阅

mousePressEvent() mouseReleaseEvent() mouseMoveEvent() event() QMouseEvent

static PySide2.QtWidgets.QWidget. mouseGrabber ( ) ¶

返回类型: QWidget

返回目前正抓取鼠标输入的 Widget。

若在此应用程序中目前没有 Widget 正抓取鼠标， None 被返回。

另请参阅

grabMouse() keyboardGrabber()

PySide2.QtWidgets.QWidget. mouseMoveEvent ( event ) ¶

参数: event – QMouseEvent

此事件处理程序，对于事件 event ，可以在子类中重实现以接收 Widget 的鼠标移动事件。

If mouse tracking is switched off, mouse move events only occur if a mouse button is pressed while the mouse is being moved. If mouse tracking is switched on, mouse move events occur even if no mouse button is pressed.

pos() reports the position of the mouse cursor, relative to this widget. For press and release events, the position is usually the same as the position of the last mouse move event, but it might be different if the user’s hand shakes. This is a feature of the underlying window system, not Qt.

If you want to show a tooltip immediately, while the mouse is moving (e.g., to get the mouse coordinates with pos() and show them as a tooltip), you must first enable mouse tracking as described above. Then, to ensure that the tooltip is updated immediately, you must call showText() 而不是 setToolTip() in your implementation of .

另请参阅

setMouseTracking() mousePressEvent() mouseReleaseEvent() mouseDoubleClickEvent() event() QMouseEvent 涂鸦范例

PySide2.QtWidgets.QWidget. mousePressEvent ( event ) ¶

参数: event – QMouseEvent

此事件处理程序，对于事件 event ，可以在子类中被重实现以接收 Widget 的鼠标按下事件。

If you create new widgets in the the mouseReleaseEvent() may not end up where you expect, depending on the underlying window system (or X11 window manager), the widgets’ location and maybe more.

The default implementation implements the closing of popup widgets when you click outside the window. For other widget types it does nothing.

另请参阅

mouseReleaseEvent() mouseDoubleClickEvent() mouseMoveEvent() event() QMouseEvent 涂鸦范例

PySide2.QtWidgets.QWidget. mouseReleaseEvent ( event ) ¶

参数: event – QMouseEvent

此事件处理程序，对于事件 event ，可以在子类中被重实现以接收 Widget 的鼠标释放事件。

另请参阅

mousePressEvent() mouseDoubleClickEvent() mouseMoveEvent() event() QMouseEvent 涂鸦范例

PySide2.QtWidgets.QWidget. move ( x , y ) ¶

参数

x – int
y – int

这是重载函数。

这相当于 move( QPoint ( x , y )).

PySide2.QtWidgets.QWidget. move ( arg__1 ) ¶

参数: arg__1 – QPoint

PySide2.QtWidgets.QWidget. moveEvent ( event ) ¶

参数: event – QMoveEvent

此事件处理程序可以在子类中重实现，以接收的 Widget 移动事件被传入 event 参数。当 Widget 收到此事件时，它已在新位置。

可访问旧位置透过 oldPos() .

另请参阅

resizeEvent() event() move() QMoveEvent

PySide2.QtWidgets.QWidget. nativeEvent ( eventType , message ) ¶

参数

eventType – QByteArray
message – void

返回类型

PyObject

此特殊事件处理程序可以在子类中重实现以接收本机平台事件，标识通过 eventType 其被传入 message 参数。

在此函数的重实现中，若想要停止 Qt 正处理的事件，返回 true 并设置 result 。 result 参数仅对 Windows 有意义。若返回 false，此本机事件被传回 Qt，将事件翻译成 Qt 事件并将它发送给 Widget。

注意

事件才会被交付给此事件处理程序，若 Widget 具有本机窗口句柄。

注意

此函数取代 Qt 4 的事件过滤器函数 x11Event() winEvent() 及 macEvent()。

平台	事件类型标识符	消息类型	结果类型
Windows	“windows_generic_MSG”	MSG *	LRESULT
macOS	“NSEvent”	NSEvent *
XCB	“xcb_generic_event_t”	xcb_generic_event_t *

另请参阅

QAbstractNativeEventFilter

PySide2.QtWidgets.QWidget. nativeParentWidget ( ) ¶

返回类型: QWidget

返回此 Widget 的本机父级 (即：具有系统标识符的下一祖先小部件) 或 None 若它没有任何本机父级。

另请参阅

effectiveWinId()

PySide2.QtWidgets.QWidget. nextInFocusChain ( ) ¶

返回类型: QWidget

Returns the next widget in this widget’s focus chain.

另请参阅

previousInFocusChain()

PySide2.QtWidgets.QWidget. normalGeometry ( ) ¶

返回类型: QRect

PySide2.QtWidgets.QWidget. overrideWindowFlags ( type ) ¶

参数: type – WindowFlags

将 Widget 窗口标志设为 flags , without 告诉窗口系统。

警告

Do not call this function unless you really know what you’re doing.

另请参阅

setWindowFlags()

PySide2.QtWidgets.QWidget. overrideWindowState ( state ) ¶

参数: state – WindowStates

The function sets the window state on child widgets similar to setWindowState() . The difference is that the window state changed event has the isOverride() flag set. It exists mainly to keep QWorkspace working.

PySide2.QtWidgets.QWidget. paintEvent ( event ) ¶

参数: event – QPaintEvent

此事件处理程序可在子类中被重实现，以接收传入描绘事件 event .

描绘事件是重新描绘 Widget 全部或局部的请求。它能发生是因为下列原因之一：

repaint() or update() was invoked,
Widget 被遮盖且现被发现，或
许多其它原因。

许多 Widget 可以在被要求时仅重新描绘其整个表面，但一些缓慢 Widget 需要通过只描绘请求区域进行优化： region() . This speed optimization does not change the result, as painting is clipped to that region during event processing. QListView and QTableView 会这样做，例如。

Qt 还试着通过把多个描绘事件合并成一个以加速描绘。当 update() is called several times or the window system sends several paint events, Qt merges these events into one event with a larger region (see united() ). The repaint() function does not permit this optimization, so we suggest using update() whenever possible.

When the paint event occurs, the update region has normally been erased, so you are painting on the widget’s background.

背景可以被设置使用 setBackgroundRole() and setPalette() .

从 Qt 4.0 起， QWidget automatically double-buffers its painting, so there is no need to write double-buffering code in to avoid flicker.

注意

通常，应该克制调用 update() or repaint() inside a . For example, calling update() or repaint() on children inside a results in undefined behavior; the child may or may not get a paint event.

警告

If you are using a custom paint engine without Qt’s backingstore, WA_PaintOnScreen 必须被设置。否则， paintEngine() will never be called; the backingstore will be used instead.

另请参阅

event() repaint() update() QPainter QPixmap QPaintEvent 指针式时钟范例

PySide2.QtWidgets.QWidget. palette ( ) ¶

返回类型: QPalette

另请参阅

setPalette()

PySide2.QtWidgets.QWidget. parentWidget ( ) ¶

返回类型: QWidget

返回此 Widget 的父级，或 None 若它没有任何父级 Widget。

PySide2.QtWidgets.QWidget. pos ( ) ¶

返回类型: QPoint

PySide2.QtWidgets.QWidget. previousInFocusChain ( ) ¶

返回类型: QWidget

The function returns the previous widget in this widget’s focus chain.

另请参阅

nextInFocusChain()

PySide2.QtWidgets.QWidget. raise_ ( ) ¶

Raises this widget to the top of the parent widget’s stack.

在此调用之后，Widget 会在任何重叠同级 Widget 之前可见。

注意

当使用 activateWindow() , you can call this function to ensure that the window is stacked on top.

另请参阅

lower() stackUnder()

PySide2.QtWidgets.QWidget. rect ( ) ¶

返回类型: QRect

PySide2.QtWidgets.QWidget. releaseKeyboard ( ) ¶: 释放键盘抓取。

另请参阅

grabKeyboard() grabMouse() releaseMouse()

PySide2.QtWidgets.QWidget. releaseMouse ( ) ¶: 释放鼠标抓取。

另请参阅

grabMouse() grabKeyboard() releaseKeyboard()

PySide2.QtWidgets.QWidget. releaseShortcut ( id ) ¶

参数: id – int

删除快捷方式采用给定 id from Qt’s shortcut system. The widget will no longer receive Shortcut events for the shortcut’s key sequence (unless it has other shortcuts with the same key sequence).

警告

You should not normally need to use this function since Qt’s shortcut system removes shortcuts automatically when their parent widget is destroyed. It is best to use QAction or QShortcut to handle shortcuts, since they are easier to use than this low-level function. Note also that this is an expensive operation.

另请参阅

grabShortcut() setShortcutEnabled()

PySide2.QtWidgets.QWidget. removeAction ( action ) ¶

参数: action – QAction

移除动作 action from this widget’s list of actions.

另请参阅

insertAction() actions() insertAction()

PySide2.QtWidgets.QWidget. render ( target [ , targetOffset=QPoint() [ , sourceRegion=QRegion() [ , renderFlags=QWidget.RenderFlags(DrawWindowBackground | DrawChildren) ] ] ] ) ¶

参数

target – QPaintDevice
targetOffset – QPoint
sourceRegion – QRegion
renderFlags – RenderFlags

PySide2.QtWidgets.QWidget. render ( painter , targetOffset [ , sourceRegion=QRegion() [ , renderFlags=QWidget.RenderFlags(DrawWindowBackground | DrawChildren) ] ] ) ¶

参数

painter – QPainter
targetOffset – QPoint
sourceRegion – QRegion
renderFlags – RenderFlags

PySide2.QtWidgets.QWidget. repaint ( x , y , w , h ) ¶

参数

x – int
y – int
w – int
h – int

这是重载函数。

此版本重新描绘矩形 ( x , y , w , h ) 在 Widget 内。

若 w 是负的，它会被替换采用 width() - x ，且若 h 是负的，它会被替换采用 height() - y .

PySide2.QtWidgets.QWidget. repaint ( arg__1 ) ¶

参数: arg__1 – QRect

PySide2.QtWidgets.QWidget. repaint ( ) ¶

直接重新绘制 Widget 通过调用 paintEvent() immediately, unless updates are disabled or the widget is hidden.

We suggest only using if you need an immediate repaint, for example during animation. In almost all circumstances update() is better, as it permits Qt to optimize for speed and minimize flicker.

警告

If you call in a function which may itself be called from paintEvent() , you may get infinite recursion. The update() function never causes recursion.

另请参阅

update() paintEvent() setUpdatesEnabled()

PySide2.QtWidgets.QWidget. repaint ( arg__1 ) ¶

参数: arg__1 – QRegion

PySide2.QtWidgets.QWidget. resize ( arg__1 ) ¶

参数: arg__1 – QSize

PySide2.QtWidgets.QWidget. resize ( w , h ) ¶

参数

w – int
h – int

这是重载函数。

此相当于 resize( QSize ( w , h )).

PySide2.QtWidgets.QWidget. resizeEvent ( event ) ¶

参数: event – QResizeEvent

此事件处理程序可以在子类中被重实现以接收 Widget 重置尺寸事件，当传入 event parameter. When is called, the widget already has its new geometry. The old size is accessible through oldSize() .

Widget 将被擦除并立即接收描绘事件，在处理重置尺寸事件后。无需 (或应该) 在此处理程序内完成绘制。

另请参阅

moveEvent() event() resize() QResizeEvent paintEvent() 涂鸦范例

PySide2.QtWidgets.QWidget. restoreGeometry ( geometry ) ¶

参数: geometry – QByteArray
返回类型: bool

还原顶层 Widget 的几何体和状态，存储在字节数组 geometry 。返回 true 当成功时；否则返回 false .

若还原几何体离屏，它将被修改为在可用屏幕几何体内。

要还原保存几何体使用 QSettings ，可以使用的代码像这样：

												settings = QSettings("MyCompany", "MyApp")
myWidget.restoreGeometry(settings.value("myWidget/geometry").toByteArray())

见窗口几何体文档编制，了解有关窗口几何体问题的概述。

使用 restoreState() to restore the geometry and the state of toolbars and dock widgets.

另请参阅

saveGeometry() QSettings saveState() restoreState()

PySide2.QtWidgets.QWidget. saveGeometry ( ) ¶

返回类型: QByteArray

保存顶层 Widget 的当前几何体及状态。

要在窗口关闭时保存几何体，可以实现像这样的关闭事件：

												class MyWidget(QWidget):
    self.settings = None
    def closeEvent(event):
        # event is a QCloseEvent
        self.settings = QSettings("MyCompany", "MyApp")
        self.settings.setValue("geometry", self.saveGeometry())
        QWidget.closeEvent(self, event)
												
											

见窗口几何体文档编制，了解有关窗口几何体问题的概述。

使用 saveState() to save the geometry and the state of toolbars and dock widgets.

另请参阅

restoreGeometry() saveState() restoreState()

PySide2.QtWidgets.QWidget. screen ( ) ¶

返回类型: QScreen

返回 Widget 所在的屏幕。

另请参阅

windowHandle()

PySide2.QtWidgets.QWidget. scroll ( dx , dy ) ¶

参数

dx – int
dy – int

卷动 Widget 包括其子级 dx 像素到右侧和 dy 向下。两者 dx and dy 可能为负值。

在卷动之后，Widget 将接收需要重新描绘区域的描绘事件。对于 Qt 知道是不透明的 Widget，这只是新近暴露部分。例如，若不透明 Widget 向左滚动 8 像素，则只有右边缘 8 像素宽条纹需要更新。

由于 Widget 默认传播其父级内容，因此需要设置 autoFillBackground 特性，或使用 setAttribute() to set the WA_OpaquePaintEvent 属性，以使 Widget 变得不透明。

对于使用内容传播的 Widget，卷动将导致整个卷动区域的更新。

另请参阅

Transparency and Double Buffering

PySide2.QtWidgets.QWidget. scroll ( dx , dy , arg__3 ) ¶

参数

dx – int
dy – int
arg__3 – QRect

这是重载函数。

此版本仅卷动 r 且不会移动 Widget 子级。

若 r 为空或无效，结果不确定。

另请参阅

QScrollArea

PySide2.QtWidgets.QWidget. setAcceptDrops ( on ) ¶

参数: on – bool

另请参阅

acceptDrops()

PySide2.QtWidgets.QWidget. setAccessibleDescription ( description ) ¶

参数: description – unicode

另请参阅

accessibleDescription()

PySide2.QtWidgets.QWidget. setAccessibleName ( name ) ¶

参数: name – unicode

另请参阅

accessibleName()

PySide2.QtWidgets.QWidget. setAttribute ( arg__1 [ , on=true ] ) ¶

参数

arg__1 – WidgetAttribute
on – bool

设置属性 attribute 在此 Widget 若 on 为 true；否则清零属性。

另请参阅

testAttribute()

PySide2.QtWidgets.QWidget. setAutoFillBackground ( enabled ) ¶

参数: enabled – bool

另请参阅

autoFillBackground()

PySide2.QtWidgets.QWidget. setBackgroundRole ( arg__1 ) ¶

参数: arg__1 – ColorRole

将 Widget 背景角色设为 role .

The background role defines the brush from the widget’s palette that is used to render the background.

若 role is NoRole , then the widget inherits its parent’s background role.

Note that styles are free to choose any color from the palette. You can modify the palette or set a style sheet if you don’t achieve the result you want with .

另请参阅

backgroundRole() foregroundRole()

PySide2.QtWidgets.QWidget. setBaseSize ( arg__1 ) ¶

参数: arg__1 – QSize

另请参阅

baseSize()

PySide2.QtWidgets.QWidget. setBaseSize ( basew , baseh ) ¶

参数

basew – int
baseh – int

这是重载函数。

This corresponds to setBaseSize ( QSize ( basew , baseh )). Sets the widgets base size to width basew and height baseh .

PySide2.QtWidgets.QWidget. setContentsMargins ( margins ) ¶

参数: margins – QMargins

这是重载函数。

setContentsMargins function sets the margins around the widget’s contents.

Sets the margins around the contents of the widget to have the sizes determined by margins . The margins are used by the layout system, and may be used by subclasses to specify the area to draw in (e.g. excluding the frame).

更改边距将触发 resizeEvent() .

另请参阅

contentsRect() contentsMargins()

PySide2.QtWidgets.QWidget. setContentsMargins ( left , top , right , bottom ) ¶

参数

left – int
top – int
right – int
bottom – int

Sets the margins around the contents of the widget to have the sizes left , top , right ，和 bottom . The margins are used by the layout system, and may be used by subclasses to specify the area to draw in (e.g. excluding the frame).

更改边距将触发 resizeEvent() .

另请参阅

contentsRect() contentsMargins()

PySide2.QtWidgets.QWidget. setContextMenuPolicy ( policy ) ¶

参数: policy – ContextMenuPolicy

另请参阅

contextMenuPolicy()

PySide2.QtWidgets.QWidget. setCursor ( arg__1 ) ¶

参数: arg__1 – QCursor

另请参阅

cursor()

PySide2.QtWidgets.QWidget. setDisabled ( arg__1 ) ¶

参数: arg__1 – bool

禁用 Widget 输入事件若 disable 为 true；否则启用输入事件。

见 enabled 文档编制，了解更多信息。

另请参阅

isEnabledTo() QKeyEvent QMouseEvent changeEvent()

PySide2.QtWidgets.QWidget. setEnabled ( arg__1 ) ¶

参数: arg__1 – bool

另请参阅

isEnabled()

PySide2.QtWidgets.QWidget. setFixedHeight ( h ) ¶

参数: h – int

Sets both the minimum and maximum heights of the widget to h without changing the widths. Provided for convenience.

另请参阅

sizeHint() minimumSize() maximumSize() setFixedSize()

PySide2.QtWidgets.QWidget. setFixedSize ( arg__1 ) ¶

参数: arg__1 – QSize

Sets both the minimum and maximum sizes of the widget to s , thereby preventing it from ever growing or shrinking.

这将覆盖默认尺寸约束设置通过 QLayout .

要移除约束，将尺寸设为 QWIDGETSIZE_MAX .

Alternatively, if you want the widget to have a fixed size based on its contents, you can call setSizeConstraint ( SetFixedSize );

另请参阅

maximumSize minimumSize

PySide2.QtWidgets.QWidget. setFixedSize ( w , h ) ¶

参数

w – int
h – int

这是重载函数。

把 Widget 的宽度设置为 w 且高度为 h .

PySide2.QtWidgets.QWidget. setFixedWidth ( w ) ¶

参数: w – int

把 Widget 的最小最大宽度设为 w 不改变高度。为了方便提供。

另请参阅

sizeHint() minimumSize() maximumSize() setFixedSize()

PySide2.QtWidgets.QWidget. setFocus ( reason ) ¶

参数: reason – FocusReason

把键盘输入聚焦给予此 Widget (或其聚焦代理)，若此 Widget 或其父级之一是 active window 。 reason argument will be passed into any focus event sent from this function, it is used to give an explanation of what caused the widget to get focus. If the window is not active, the widget will be given the focus when the window becomes active.

First, a focus about to change event is sent to the focus widget (if any) to tell it that it is about to lose the focus. Then focus is changed, a focus out event is sent to the previous focus item and a focus in event is sent to the new item to tell it that it just received the focus. (Nothing happens if the focus in and focus out widgets are the same.)

注意

On embedded platforms, setFocus() will not cause an input panel to be opened by the input method. If you want this to happen, you have to send a RequestSoftwareInputPanel event to the widget yourself.

setFocus() gives focus to a widget regardless of its focus policy, but does not clear any keyboard grab (see grabKeyboard() ).

Be aware that if the widget is hidden, it will not accept focus until it is shown.

警告

If you call setFocus() in a function which may itself be called from focusOutEvent() or focusInEvent() , you may get an infinite recursion.

另请参阅

hasFocus() clearFocus() focusInEvent() focusOutEvent() setFocusPolicy() focusWidget() focusWidget() grabKeyboard() grabMouse() Widget 中的键盘焦点 RequestSoftwareInputPanel

PySide2.QtWidgets.QWidget. setFocus ( ) ¶

这是重载函数。

把键盘输入聚焦给予此 Widget (或其聚焦代理)，若此 Widget 或其父级之一是 active window .

PySide2.QtWidgets.QWidget. setFocusPolicy ( policy ) ¶

参数: policy – FocusPolicy

另请参阅

focusPolicy()

PySide2.QtWidgets.QWidget. setFocusProxy ( arg__1 ) ¶

参数: arg__1 – QWidget

Sets the widget’s focus proxy to widget w 。若 w is None ，函数把此 Widget 重置为没有聚焦代理。

Some widgets can “have focus”, but create a child widget, such as QLineEdit , to actually handle the focus. In this case, the widget can set the line edit to be its focus proxy.

sets the widget which will actually get focus when “this widget” gets it. If there is a focus proxy, setFocus() and hasFocus() operate on the focus proxy.

另请参阅

focusProxy()

PySide2.QtWidgets.QWidget. setFont ( arg__1 ) ¶

参数: arg__1 – QFont

另请参阅

font()

PySide2.QtWidgets.QWidget. setForegroundRole ( arg__1 ) ¶

参数: arg__1 – ColorRole

把 Widget 的前景角色设为 role .

The foreground role defines the color from the widget’s palette 用于绘制前景。

若 role is NoRole , the widget uses a foreground role that contrasts with the background role.

Note that styles are free to choose any color from the palette. You can modify the palette or set a style sheet if you don’t achieve the result you want with .

另请参阅

foregroundRole() backgroundRole()

PySide2.QtWidgets.QWidget. setGeometry ( arg__1 ) ¶

参数: arg__1 – QRect

另请参阅

geometry()

PySide2.QtWidgets.QWidget. setGeometry ( x , y , w , h ) ¶

参数

x – int
y – int
w – int
h – int

这是重载函数。

This corresponds to setGeometry ( QRect ( x , y , w , h )).

PySide2.QtWidgets.QWidget. setGraphicsEffect ( effect ) ¶

参数: effect – QGraphicsEffect

The function is for setting the widget’s graphics effect.

集 effect as the widget’s effect. If there already is an effect installed on this widget, QWidget will delete the existing effect before installing the new effect .

若 effect is the installed effect on a different widget, will remove the effect from the widget and install it on this widget.

QWidget takes ownership of effect .

注意

此函数将效果应用到自身及其所有子级。

注意

Graphics effects are not supported for OpenGL-based widgets, such as QGLWidget , QOpenGLWidget and QQuickWidget .

另请参阅

graphicsEffect()

PySide2.QtWidgets.QWidget. setHidden ( hidden ) ¶

参数: hidden – bool

便利函数，相当于 setVisible (!``hidden`` ).

另请参阅

isHidden()

PySide2.QtWidgets.QWidget. setInputMethodHints ( hints ) ¶

参数: hints – InputMethodHints

另请参阅

inputMethodHints()

PySide2.QtWidgets.QWidget. setLayout ( arg__1 ) ¶

参数: arg__1 – QLayout

将此 Widget 的布局管理器设为 layout .

如果此 Widget 已安装了布局管理器， QWidget won’t let you install another. You must first delete the existing layout manager (returned by layout() ) before you can call with the new layout.

若 layout is the layout manager on a different widget, will reparent the layout and make it the layout manager for this widget.

范例：

												QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(formWidget);
setLayout(layout);
												
											

An alternative to calling this function is to pass this widget to the layout’s constructor.

QWidget 将拥有所有权对于 layout .

另请参阅

layout() 布局管理

PySide2.QtWidgets.QWidget. setLayoutDirection ( direction ) ¶

参数: direction – LayoutDirection

另请参阅

layoutDirection()

PySide2.QtWidgets.QWidget. setLocale ( locale ) ¶

参数: locale – QLocale

另请参阅

locale()

PySide2.QtWidgets.QWidget. setMask ( arg__1 ) ¶

参数: arg__1 – QBitmap

PySide2.QtWidgets.QWidget. setMask ( arg__1 ) ¶

参数: arg__1 – QRegion

PySide2.QtWidgets.QWidget. setMaximumHeight ( maxh ) ¶

参数: maxh – int

另请参阅

maximumHeight()

PySide2.QtWidgets.QWidget. setMaximumSize ( arg__1 ) ¶

参数: arg__1 – QSize

另请参阅

maximumSize()

PySide2.QtWidgets.QWidget. setMaximumSize ( maxw , maxh ) ¶

参数

maxw – int
maxh – int

这是重载函数。

This function corresponds to setMaximumSize ( QSize ( maxw , maxh ))。设置最大宽度到 maxw 和最大高度到 maxh .

PySide2.QtWidgets.QWidget. setMaximumWidth ( maxw ) ¶

参数: maxw – int

另请参阅

maximumWidth()

PySide2.QtWidgets.QWidget. setMinimumHeight ( minh ) ¶

参数: minh – int

另请参阅

minimumHeight()

PySide2.QtWidgets.QWidget. setMinimumSize ( arg__1 ) ¶

参数: arg__1 – QSize

另请参阅

minimumSize()

PySide2.QtWidgets.QWidget. setMinimumSize ( minw , minh ) ¶

参数

minw – int
minh – int

这是重载函数。

This function corresponds to setMinimumSize ( QSize (minw, minh)). Sets the minimum width to minw and the minimum height to minh .

PySide2.QtWidgets.QWidget. setMinimumWidth ( minw ) ¶

参数: minw – int

另请参阅

minimumWidth()

PySide2.QtWidgets.QWidget. setMouseTracking ( enable ) ¶

参数: enable – bool

另请参阅

hasMouseTracking()

PySide2.QtWidgets.QWidget. setPalette ( arg__1 ) ¶

参数: arg__1 – QPalette

另请参阅

palette()

PySide2.QtWidgets.QWidget. setParent ( parent ) ¶

参数: parent – QWidget

将 Widget 父级设为 parent , and resets the window flags. The widget is moved to position (0, 0) in its new parent.

If the new parent widget is in a different window, the reparented widget and its children are appended to the end of the tab chain of the new parent widget, in the same internal order as before. If one of the moved widgets had keyboard focus, calls clearFocus() for that widget.

If the new parent widget is in the same window as the old parent, setting the parent doesn’t change the tab order or keyboard focus.

If the “new” parent widget is the old parent widget, this function does nothing.

注意

The widget becomes invisible as part of changing its parent, even if it was previously visible. You must call show() to make the widget visible again.

警告

It is very unlikely that you will ever need this function. If you have a widget that changes its content dynamically, it is far easier to use QStackedWidget .

另请参阅

setWindowFlags()

PySide2.QtWidgets.QWidget. setParent ( parent , f ) ¶

参数

parent – QWidget
f – WindowFlags

这是重载函数。

此函数还接受 Widget 标志， f 作为自变量。

PySide2.QtWidgets.QWidget. setShortcutAutoRepeat ( id [ , enable=true ] ) ¶

参数

id – int
enable – bool

若 enable is true, auto repeat of the shortcut with the given id 被启用；否则它被禁用。

另请参阅

grabShortcut() releaseShortcut()

PySide2.QtWidgets.QWidget. setShortcutEnabled ( id [ , enable=true ] ) ¶

参数

id – int
enable – bool

若 enable 为 True，快捷方式采用给定 id 被启用；否则快捷方式被禁用。

警告

You should not normally need to use this function since Qt’s shortcut system enables/disables shortcuts automatically as widgets become hidden/visible and gain or lose focus. It is best to use QAction or QShortcut to handle shortcuts, since they are easier to use than this low-level function.

另请参阅

grabShortcut() releaseShortcut()

PySide2.QtWidgets.QWidget. setSizeIncrement ( arg__1 ) ¶

参数: arg__1 – QSize

另请参阅

sizeIncrement()

PySide2.QtWidgets.QWidget. setSizeIncrement ( w , h ) ¶

参数

w – int
h – int

这是重载函数。

将 x (宽度) 尺寸增量设为 w and the y (height) size increment to h .

PySide2.QtWidgets.QWidget. setSizePolicy ( arg__1 ) ¶

参数: arg__1 – QSizePolicy

另请参阅

sizePolicy()

PySide2.QtWidgets.QWidget. setSizePolicy ( horizontal , vertical ) ¶

参数

horizontal – Policy
vertical – Policy

这是重载函数。

将 Widget 尺寸策略设为 horizontal and vertical , with standard stretch and no height-for-width.

另请参阅

QSizePolicy()

PySide2.QtWidgets.QWidget. setStatusTip ( arg__1 ) ¶

参数: arg__1 – unicode

另请参阅

statusTip()

PySide2.QtWidgets.QWidget. setStyle ( arg__1 ) ¶

参数: arg__1 – QStyle

Sets the widget’s GUI style to style . The ownership of the style object is not transferred.

If no style is set, the widget uses the application’s style, style() 代替。

Setting a widget’s style has no effect on existing or future child widgets.

警告

This function is particularly useful for demonstration purposes, where you want to show Qt’s styling capabilities. Real applications should avoid it and use one consistent GUI style instead.

警告

Qt style sheets are currently not supported for custom QStyle subclasses. We plan to address this in some future release.

另请参阅

style() QStyle style() setStyle()

PySide2.QtWidgets.QWidget. setStyleSheet ( styleSheet ) ¶

参数: styleSheet – unicode

另请参阅

styleSheet()

static PySide2.QtWidgets.QWidget. setTabOrder ( arg__1 , arg__2 ) ¶

参数

arg__1 – QWidget
arg__2 – QWidget

Puts the second widget after the first widget in the focus order.

It effectively removes the second widget from its focus chain and inserts it after the first 小部件。

Note that since the tab order of the second widget is changed, you should order a chain like this:

												widget.setTabOrder(a, b) # a to b
widget.setTabOrder(b, c) # a to b to c
widge.tsetTabOrder(c, d) # a to b to c to d
												
											

not 像这样：

												# WRONG
widget.setTabOrder(c, d) # c to d
widget.setTabOrder(a, b) # a to b AND c to d
widget.setTabOrder(b, c) # a to b to c, but not c to d
												
											

若 first or second has a focus proxy, correctly substitutes the proxy.

注意

Since Qt 5.10: A widget that has a child as focus proxy is understood as a compound widget. When setting a tab order between one or two compound widgets, the local tab order inside each will be preserved. This means that if both widgets are compound widgets, the resulting tab order will be from the last child inside first , to the first child inside second .

另请参阅

setFocusPolicy() setFocusProxy() Widget 中的键盘焦点

PySide2.QtWidgets.QWidget. setTabletTracking ( enable ) ¶

参数: enable – bool

另请参阅

hasTabletTracking()

PySide2.QtWidgets.QWidget. setToolTip ( arg__1 ) ¶

参数: arg__1 – unicode

另请参阅

toolTip()

PySide2.QtWidgets.QWidget. setToolTipDuration ( msec ) ¶

参数: msec – int

另请参阅

toolTipDuration()

PySide2.QtWidgets.QWidget. setUpdatesEnabled ( enable ) ¶

参数: enable – bool

另请参阅

updatesEnabled()

PySide2.QtWidgets.QWidget. setVisible ( visible ) ¶

参数: visible – bool

另请参阅

isVisible()

PySide2.QtWidgets.QWidget. setWhatsThis ( arg__1 ) ¶

参数: arg__1 – unicode

另请参阅

whatsThis()

PySide2.QtWidgets.QWidget. setWindowFilePath ( filePath ) ¶

参数: filePath – unicode

另请参阅

windowFilePath()

PySide2.QtWidgets.QWidget. setWindowFlag ( arg__1 [ , on=true ] ) ¶

参数

arg__1 – WindowType
on – bool

设置窗口标志 flag 在此 Widget 若 on 为 true；否则清零标志。

另请参阅

setWindowFlags() windowFlags() windowType()

PySide2.QtWidgets.QWidget. setWindowFlags ( type ) ¶

参数: type – WindowFlags

另请参阅

windowFlags()

PySide2.QtWidgets.QWidget. setWindowIcon ( icon ) ¶

参数: icon – QIcon

另请参阅

windowIcon()

PySide2.QtWidgets.QWidget. setWindowIconText ( arg__1 ) ¶

参数: arg__1 – unicode

另请参阅

windowIconText()

PySide2.QtWidgets.QWidget. setWindowModality ( windowModality ) ¶

参数: windowModality – WindowModality

另请参阅

windowModality()

PySide2.QtWidgets.QWidget. setWindowModified ( arg__1 ) ¶

参数: arg__1 – bool

另请参阅

isWindowModified()

PySide2.QtWidgets.QWidget. setWindowOpacity ( level ) ¶

参数: level – qreal

另请参阅

windowOpacity()

PySide2.QtWidgets.QWidget. setWindowRole ( arg__1 ) ¶

参数: arg__1 – unicode

Sets the window’s role to role 。这仅对 X11 中的窗口有意义。

另请参阅

windowRole()

PySide2.QtWidgets.QWidget. setWindowState ( state ) ¶

参数: state – WindowStates

把窗口状态设为 windowState . The window state is a OR’ed combination of WindowState : WindowMinimized , WindowMaximized , WindowFullScreen ，和 WindowActive .

若窗口不可见 (即 isVisible() 返回 false )，窗口状态将生效当 show() is called. For visible windows, the change is immediate. For example, to toggle between full-screen and normal mode, use the following code:

												w.setWindowState(w.windowState() ^ Qt.WindowFullScreen)
												
											

为还原和激活最小化窗口 (当维持其最大化和/或全屏状态时)，使用以下：

												w.setWindowState(w.windowState() & ~Qt.WindowMinimized | Qt.WindowActive)
												
											

调用此函数将隐藏 Widget。必须调用 show() to make the widget visible again.

注意

在某些窗口系统中 WindowActive 不是立即的，且在某些情况下可能被忽略。

当窗口状态改变时，Widget 接收 changeEvent() of type WindowStateChange .

另请参阅

WindowState windowState()

PySide2.QtWidgets.QWidget. setWindowTitle ( arg__1 ) ¶

参数: arg__1 – unicode

另请参阅

windowTitle()

PySide2.QtWidgets.QWidget. show ( ) ¶

展示 Widget 及其子级 Widget。

这相当于调用 showFullScreen() , showMaximized() ，或 setVisible (true), depending on the platform’s default behavior for the window flags.

另请参阅

raise() showEvent() hide() setVisible() showMinimized() showMaximized() showNormal() isVisible() windowFlags()

PySide2.QtWidgets.QWidget. showEvent ( event ) ¶

参数: event – QShowEvent

此事件处理程序可以在子类中被重实现以接收 Widget 展示事件，当传入 event 参数。

非自发展示事件会被立即发送给 Widget 在展示它们之前。窗口的自发展示事件是之后交付的。

另请参阅

visible event() QShowEvent

PySide2.QtWidgets.QWidget. showFullScreen ( ) ¶

以全屏模式展示 Widget。

调用此函数仅影响 windows .

要从全屏模式返回，调用 showNormal() .

Full-screen mode works fine under Windows, but has certain problems under X. These problems are due to limitations of the ICCCM protocol that specifies the communication between X11 clients and the window manager. ICCCM simply does not understand the concept of non-decorated full-screen windows. Therefore, the best we can do is to request a borderless window and place and resize it to fill the entire screen. Depending on the window manager, this may or may not work. The borderless window is requested using MOTIF hints, which are at least partially supported by virtually all modern window managers.

An alternative would be to bypass the window manager entirely and create a window with the X11BypassWindowManagerHint flag. This has other severe problems though, like totally broken keyboard focus and very strange effects on desktop changes or when the user raises other windows.

遵循后现代 ICCCM 规范的 X11 窗口管理器正确支持全屏模式。

另请参阅

showNormal() showMaximized() show() hide() isVisible()

PySide2.QtWidgets.QWidget. showMaximized ( ) ¶

最大化展示 Widget。

调用此函数仅影响 windows .

在 X11，此函数可能不正确工作于某些窗口管理器。见窗口几何体文档编制了解解释。

另请参阅

setWindowState() showNormal() showMinimized() show() hide() isVisible()

PySide2.QtWidgets.QWidget. showMinimized ( ) ¶

以图标形式最小化展示 Widget。

调用此函数仅影响 windows .

另请参阅

showNormal() showMaximized() show() hide() isVisible() isMinimized()

PySide2.QtWidgets.QWidget. showNormal ( ) ¶

还原 Widget 在它被最大化或最小化之后。

调用此函数仅影响 windows .

另请参阅

setWindowState() showMinimized() showMaximized() show() hide() isVisible()

PySide2.QtWidgets.QWidget. size ( ) ¶

返回类型: QSize

PySide2.QtWidgets.QWidget. sizeHint ( ) ¶

返回类型: QSize

PySide2.QtWidgets.QWidget. sizeIncrement ( ) ¶

返回类型: QSize

另请参阅

setSizeIncrement()

PySide2.QtWidgets.QWidget. sizePolicy ( ) ¶

返回类型: QSizePolicy

另请参阅

setSizePolicy()

PySide2.QtWidgets.QWidget. stackUnder ( arg__1 ) ¶

参数: arg__1 – QWidget

下置 Widget w in the parent widget’s stack.

要使这工作，Widget 本身和 w 必须同级。

另请参阅

raise() lower()

PySide2.QtWidgets.QWidget. statusTip ( ) ¶

返回类型: unicode

另请参阅

setStatusTip()

PySide2.QtWidgets.QWidget. style ( ) ¶

返回类型: QStyle

另请参阅

setStyle() setStyle() style()

PySide2.QtWidgets.QWidget. styleSheet ( ) ¶

返回类型: unicode

另请参阅

setStyleSheet()

PySide2.QtWidgets.QWidget. tabletEvent ( event ) ¶

参数: event – QTabletEvent

此事件处理程序，对于事件 event ，可在子类中重新实现以接收 Widget 的 Tablet (平板电脑) 事件。

若重实现此处理程序，非常重要的是 ignore() the event if you do not handle it, so that the widget’s parent can interpret it.

默认实现忽略事件。

若数位板跟踪被切换为关，数位板移动事件才发生若手写笔接触数位板，或至少按下一手写笔按钮，当移动手写笔时。若数位板跟踪被切换为开，数位板移动事件发生，即使手写笔悬停在数位板附近，没有按下按钮。

另请参阅

ignore() accept() event() setTabletTracking() QTabletEvent

PySide2.QtWidgets.QWidget. testAttribute ( arg__1 ) ¶

参数: arg__1 – WidgetAttribute
返回类型: bool

返回 true 若属性 attribute 在此 Widget 被设置；否则返回 false .

另请参阅

setAttribute()

PySide2.QtWidgets.QWidget. toolTip ( ) ¶

返回类型: unicode

另请参阅

setToolTip()

PySide2.QtWidgets.QWidget. toolTipDuration ( ) ¶

返回类型: int

另请参阅

setToolTipDuration()

PySide2.QtWidgets.QWidget. topLevelWidget ( ) ¶

返回类型: QWidget

使用 window() 代替。

PySide2.QtWidgets.QWidget. underMouse ( ) ¶

返回类型: bool

返回 true 若 Widget 在鼠标光标下方；否则返回 false .

此值不会正确更新，在拖放操作期间。

另请参阅

enterEvent() leaveEvent()

PySide2.QtWidgets.QWidget. ungrabGesture ( type ) ¶

参数: type – GestureType

退订 Widget 从给定 gesture type

另请参阅

grabGesture() QGestureEvent

PySide2.QtWidgets.QWidget. unsetCursor ( ) ¶

PySide2.QtWidgets.QWidget. unsetLayoutDirection ( ) ¶

PySide2.QtWidgets.QWidget. unsetLocale ( ) ¶

PySide2.QtWidgets.QWidget. update ( ) ¶

更新 Widget 除非更新被禁用或 Widget 被隐藏。

此函数不会导致立即重新绘制；相反，它在 Qt 返回到主事件循环时调度描绘处理事件。这准许 Qt 去优化以提高速度并减少闪烁相比调用 repaint() does.

Calling several times normally results in just one paintEvent() 调用。

Qt normally erases the widget’s area before the paintEvent() call. If the WA_OpaquePaintEvent Widget 属性被设置，Widget 负责采用不透明颜色描绘其所有像素。

另请参阅

repaint() paintEvent() setUpdatesEnabled() 指针式时钟范例

PySide2.QtWidgets.QWidget. update ( arg__1 ) ¶

参数: arg__1 – QRect

PySide2.QtWidgets.QWidget. update ( arg__1 ) ¶

参数: arg__1 – QRegion

PySide2.QtWidgets.QWidget. update ( x , y , w , h ) ¶

参数

x – int
y – int
w – int
h – int

这是重载函数。

此版本更新矩形 ( x , y , w , h ) 在 Widget 内。

PySide2.QtWidgets.QWidget. updateGeometry ( ) ¶

通知布局系统此 Widget 已改变，且可能需要更改几何体。

调用此函数，若 sizeHint() or sizePolicy() have changed.

For explicitly hidden widgets, is a no-op. The layout system will be notified as soon as the widget is shown.

PySide2.QtWidgets.QWidget. updateMicroFocus ( ) ¶: Updates the widget’s micro focus.

PySide2.QtWidgets.QWidget. updatesEnabled ( ) ¶

返回类型: bool

另请参阅

setUpdatesEnabled()

PySide2.QtWidgets.QWidget. visibleRegion ( ) ¶

返回类型: QRegion

返回可以发生描绘事件的未遮盖区域。

对于可见 Widget，这是其它 Widget 未覆盖的近似区域；否则，这是空区域。

repaint() function calls this function if necessary, so in general you do not need to call it.

PySide2.QtWidgets.QWidget. whatsThis ( ) ¶

返回类型: unicode

另请参阅

setWhatsThis()

PySide2.QtWidgets.QWidget. wheelEvent ( event ) ¶

参数: event – QWheelEvent

此事件处理程序，对于事件 event ，可以在子类中被重实现以接收 Widget 滚轮事件。

若重实现此处理程序，非常重要的是 ignore() the event if you do not handle it, so that the widget’s parent can interpret it.

默认实现忽略事件。

另请参阅

ignore() accept() event() QWheelEvent

PySide2.QtWidgets.QWidget. winId ( ) ¶

返回类型: WId

返回 Widget 的窗口系统标识符。

原则上是可移植的，但若使用它，可能会做一些不可移植的事情。小心。

If a widget is non-native (alien) and is invoked on it, that widget will be provided a native handle.

此值可能在运行时改变。事件带有类型 WinIdChange 会被发送给 Widget 在窗口系统标识符改变后。

另请参阅

find()

PySide2.QtWidgets.QWidget. window ( ) ¶

返回类型: QWidget

返回用于此 Widget 的窗口，即具有 (或可能具有) 窗口系统框架的下一祖先 Widget。

若 Widget 是窗口，Widget 本身被返回。

典型用法是更改窗口标题：

												aWidget.window().setWindowTitle("New Window Title")
												
											

另请参阅

isWindow()

PySide2.QtWidgets.QWidget. windowFilePath ( ) ¶

返回类型: unicode

另请参阅

setWindowFilePath()

PySide2.QtWidgets.QWidget. windowFlags ( ) ¶

返回类型: WindowFlags

另请参阅

setWindowFlags()

PySide2.QtWidgets.QWidget. windowHandle ( ) ¶

返回类型: QWindow

如果这是本机 Widget，返回关联 QWindow 。否则返回 null。

Native widgets include toplevel widgets, QGLWidget , and child widgets on which winId() was called.

另请参阅

winId() screen()

PySide2.QtWidgets.QWidget. windowIcon ( ) ¶

返回类型: QIcon

另请参阅

setWindowIcon()

PySide2.QtWidgets.QWidget. windowIconChanged ( icon ) ¶

参数: icon – QIcon

PySide2.QtWidgets.QWidget. windowIconText ( ) ¶

返回类型: unicode

另请参阅

setWindowIconText()

PySide2.QtWidgets.QWidget. windowIconTextChanged ( iconText ) ¶

参数: iconText – unicode

PySide2.QtWidgets.QWidget. windowModality ( ) ¶

返回类型: WindowModality

另请参阅

setWindowModality()

PySide2.QtWidgets.QWidget. windowOpacity ( ) ¶

返回类型: qreal

另请参阅

setWindowOpacity()

PySide2.QtWidgets.QWidget. windowRole ( ) ¶

返回类型: unicode

Returns the window’s role, or an empty string.

另请参阅

setWindowRole() windowIcon windowTitle

PySide2.QtWidgets.QWidget. windowState ( ) ¶

返回类型: WindowStates

Returns the current window state. The window state is a OR’ed combination of WindowState : WindowMinimized , WindowMaximized , WindowFullScreen ，和 WindowActive .

另请参阅

WindowState setWindowState()

PySide2.QtWidgets.QWidget. windowTitle ( ) ¶

返回类型: unicode

另请参阅

setWindowTitle()

PySide2.QtWidgets.QWidget. windowTitleChanged ( title ) ¶

参数: title – unicode

PySide2.QtWidgets.QWidget. windowType ( ) ¶

返回类型: WindowType

返回此 Widget 的窗口类型。这等同于 windowFlags() & WindowType_Mask .

另请参阅

windowFlags

PySide2.QtWidgets.QWidget. x ( ) ¶

返回类型: int

PySide2.QtWidgets.QWidget. y ( ) ¶

返回类型: int

上下文	函数和特性
窗口函数	`show()` , `hide()` , `raise()` , `lower()` , `close()` .
顶层窗口	`windowModified` , `windowTitle` , `windowIcon` , `isActiveWindow` , `activateWindow()` , `minimized` , `showMinimized()` , `maximized` , `showMaximized()` , `fullScreen` , `showFullScreen()` , `showNormal()` .
窗口内容	`update()` , `repaint()` , `scroll()` .
几何体	`pos` , `x()` , `y()` , `rect` , `size` , `width()` , `height()` , `move()` , `resize()` , `sizePolicy` , `sizeHint()` , `minimumSizeHint()` , `updateGeometry()` , `layout()` , `frameGeometry` , `geometry` , `childrenRect` , `childrenRegion` , `adjustSize()` , `mapFromGlobal()` , `mapToGlobal()` , `mapFromParent()` , `mapToParent()` , `maximumSize` , `minimumSize` , `sizeIncrement` , `baseSize` , `setFixedSize()`
模式	`visible` , `isVisibleTo()` , `enabled` , `isEnabledTo()` , `modal` , `isWindow()` , `mouseTracking` , `updatesEnabled` , `visibleRegion()` .
外观和感觉	`style()` , `setStyle()` , styleSheet , `cursor` , font , `palette` , `backgroundRole()` , `setBackgroundRole()` , `fontInfo()` , `fontMetrics()` .
键盘聚焦函数	`focus` , `focusPolicy` , `setFocus()` , `clearFocus()` , `setTabOrder()` , `setFocusProxy()` , `focusNextChild()` , `focusPreviousChild()` .
鼠标和键盘抓取	`grabMouse()` , `releaseMouse()` , `grabKeyboard()` , `releaseKeyboard()` , `mouseGrabber()` , `keyboardGrabber()` .
事件处理程序	`event()` , `mousePressEvent()` , `mouseReleaseEvent()` , `mouseDoubleClickEvent()` , `mouseMoveEvent()` , `keyPressEvent()` , `keyReleaseEvent()` , `focusInEvent()` , `focusOutEvent()` , `wheelEvent()` , `enterEvent()` , `leaveEvent()` , `paintEvent()` , `moveEvent()` , `resizeEvent()` , `closeEvent()` , `dragEnterEvent()` , `dragMoveEvent()` , `dragLeaveEvent()` , `dropEvent()` , `childEvent()` , `showEvent()` , `hideEvent()` , `customEvent()` . `changeEvent()` ,
系统函数	`parentWidget()` , `window()` , `setParent()` , `winId()` , `find()` , `metric()` .
上下文菜单	`contextMenuPolicy` , `contextMenuEvent()` , `customContextMenuRequested()` , `actions()`
交互式帮助	`setToolTip()` , `setWhatsThis()`

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