QDialog ¶

函数 ¶

虚函数 ¶

槽 ¶

信号 ¶

模态对话框 ¶

A modal 对话框是在同一应用程序中阻塞其它可见窗口输入的对话框。用于从用户请求文件名 (或用于设置应用程序首选项) 的通常是模态对话框。对话框可以为 application modal (默认) 或 window modal .

When an application modal dialog is opened, the user must finish interacting with the dialog and close it before they can access any other window in the application. Window modal dialogs only block access to the window associated with the dialog, allowing the user to continue to use other windows in an application.

The most common way to display a modal dialog is to call its exec() function. When the user closes the dialog, exec() will provide a useful return value . To close the dialog and return the appropriate value, you must connect a default button, e.g. an OK button to the accept() slot and a Cancel button to the reject() slot. Alternatively, you can call the done() slot with 接受 or Rejected .

An alternative is to call setModal (true) or setWindowModality() ，那么 show() 。不像 exec() , show() returns control to the caller immediately. Calling setModal (true) is especially useful for progress dialogs, where the user must have the ability to interact with the dialog, e.g. to cancel a long running operation. If you use show() and setModal (true) together to perform a long operation, you must call processEvents() periodically during processing to enable the user to interact with the dialog. (See QProgressDialog .)

非模态对话框 ¶

A modeless dialog is a dialog that operates independently of other windows in the same application. Find and replace dialogs in word-processors are often modeless to allow the user to interact with both the application’s main window and with the dialog.

非模态对话框被显示使用 show() , which returns control to the caller immediately.

若援引 show() 函数在隐藏对话框之后，对话框将显示在其原始位置。这是因为窗口管理器决定程序员未明确放置的窗口位置。要保留用户已移动对话框的位置，把其位置保存在 closeEvent() 处理程序，然后把对话框移动到该位置，在再次展示它之前。

默认按钮 ¶

A dialog’s default button is the button that’s pressed when the user presses Enter (Return). This button is used to signify that the user accepts the dialog’s settings and wants to close the dialog. Use setDefault() , isDefault() and autoDefault() to set and control the dialog’s default button.

Esc 键 ¶

若用户在对话框中按 Esc 键， reject() will be called. This will cause the window to close: The close event 不能是 ignored .

可扩展性 ¶

Extensibility is the ability to show the dialog in two ways: a partial dialog that shows the most commonly used options, and a full dialog that shows all the options. Typically an extensible dialog will initially appear as a partial dialog, but with a More toggle button. If the user presses the More button down, the dialog is expanded. The 扩展范例 shows how to achieve extensible dialogs using Qt.

返回值 (模态对话框) ¶

Modal dialogs are often used in situations where a return value is required, e.g. to indicate whether the user pressed OK or Cancel. A dialog can be closed by calling the accept() 或 reject() slots, and exec() will return 接受 or Rejected as appropriate. The exec() call returns the result of the dialog. The result is also available from result() if the dialog has not been destroyed.

In order to modify your dialog’s close behavior, you can reimplement the functions accept() , reject() or done() 。 closeEvent() function should only be reimplemented to preserve the dialog’s position or to override the standard close or reject behavior.

代码范例 ¶

模态对话框：

def countWords(self):
    dialog = WordCountDialog(self)
    dialog.setWordCount(document().wordCount())
    dialog.exec_()
												

非模态对话框：

def find(self):
    if not self.findDialog:
        self.findDialog = FindDialog(self)
        self.findDialog.findNext.connect(self.findNext)
    self.findDialog.show()
    self.findDialog.raise()
    self.findDialog.activateWindow()
												

另请参阅

QDialogButtonBox QTabWidget QWidget QProgressDialog GUI Design Handbook: Dialogs, Standard 扩展范例 标准对话框范例

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

param f

WindowFlags

param parent

QWidget

构造对话框采用父级 parent .

A dialog is always a top-level widget, but if it has a parent, its default location is centered on top of the parent. It will also share the parent’s taskbar entry.

The widget flags f are passed on to the QWidget constructor. If, for example, you don’t want a What’s This button in the title bar of the dialog, pass WindowTitleHint | WindowSystemMenuHint in f .

另请参阅

setWindowFlags()

PySide2.QtWidgets.QDialog. DialogCode ¶

由模态对话框返回的值。

常量	描述
QDialog.Accepted
QDialog.Rejected

PySide2.QtWidgets.QDialog. accept ( ) ¶

隐藏模态对话框并将结果代码设为 接受 .

另请参阅

reject() done()

PySide2.QtWidgets.QDialog. accepted ( ) ¶

PySide2.QtWidgets.QDialog. adjustPosition ( arg__1 ) ¶

参数

arg__1 – QWidget

PySide2.QtWidgets.QDialog. done ( arg__1 ) ¶

参数

arg__1 – int

关闭对话框并将其结果代码设为 r 。 finished() signal will emit r ; if r is 接受 or Rejected ， accepted() 或 rejected() signals will also be emitted, respectively.

If this dialog is shown with exec() , also causes the local event loop to finish, and exec() to return r .

As with close() , deletes the dialog if the WA_DeleteOnClose flag is set. If the dialog is the application’s main widget, the application terminates. If the dialog is the last window closed, the lastWindowClosed() 信号被发射。

另请参阅

accept() reject() activeWindow() quit()

PySide2.QtWidgets.QDialog. exec_ ( ) ¶

返回类型

int

把对话框展示成 modal dialog ，阻塞直到用户关闭它。函数返回 DialogCode 结果。

若对话框是 application modal , users cannot interact with any other window in the same application until they close the dialog. If the dialog is window modal , only interaction with the parent window is blocked while the dialog is open. By default, the dialog is application modal.

注意

Avoid using this function; instead, use open() . Unlike , open() is asynchronous, and does not spin an additional event loop. This prevents a series of dangerous bugs from happening (e.g. deleting the dialog’s parent while the dialog is open via ). When using open() you can connect to the finished() signal of QDialog to be notified when the dialog is closed.

另请参阅

open() show() result() setWindowModality()

PySide2.QtWidgets.QDialog. extension ( ) ¶

返回类型

QWidget

注意

此函数被弃用。

Returns the dialog’s extension or None if no extension has been defined.

Instead of using this functionality, we recommend that you simply call show() or hide() on the part of the dialog that you want to use as an extension. See the 扩展范例 了解细节。

另请参阅

setExtension() showExtension() setOrientation()

PySide2.QtWidgets.QDialog. finished ( result ) ¶

参数

result – int

PySide2.QtWidgets.QDialog. isSizeGripEnabled ( ) ¶

返回类型

bool

PySide2.QtWidgets.QDialog. open ( ) ¶

把对话框展示成 window modal dialog ，立即返回。

另请参阅

exec() show() result() setWindowModality()

PySide2.QtWidgets.QDialog. orientation ( ) ¶

返回类型

取向

注意

此函数被弃用。

Returns the dialog’s extension orientation.

Instead of using this functionality, we recommend that you simply call show() or hide() on the part of the dialog that you want to use as an extension. See the 扩展范例 了解细节。

另请参阅

setOrientation() extension()

PySide2.QtWidgets.QDialog. reject ( ) ¶

隐藏模态对话框并将结果代码设为 Rejected .

另请参阅

accept() done()

PySide2.QtWidgets.QDialog. rejected ( ) ¶

PySide2.QtWidgets.QDialog. result ( ) ¶

返回类型

int

In general returns the modal dialog’s result code, 接受 or Rejected .

注意

When called on a QMessageBox instance, the returned value is a value of the StandardButton 枚举。

Do not call this function if the dialog was constructed with the WA_DeleteOnClose 属性。

另请参阅

setResult()

PySide2.QtWidgets.QDialog. setExtension ( extension ) ¶

参数

extension – QWidget

注意

此函数被弃用。

Sets the widget, extension , to be the dialog’s extension, deleting any previous extension. The dialog takes ownership of the extension. Note that if None is passed, any existing extension will be deleted. This function must only be called while the dialog is hidden.

Instead of using this functionality, we recommend that you simply call show() or hide() on the part of the dialog that you want to use as an extension. See the 扩展范例 了解细节。

另请参阅

extension() showExtension() setOrientation()

PySide2.QtWidgets.QDialog. setModal ( modal ) ¶

参数

modal – bool

PySide2.QtWidgets.QDialog. setOrientation ( orientation ) ¶

参数

orientation – 取向

注意

此函数被弃用。

若 orientation is Horizontal , the extension will be displayed to the right of the dialog’s main area. If orientation is Vertical , the extension will be displayed below the dialog’s main area.

Instead of using this functionality, we recommend that you simply call show() or hide() on the part of the dialog that you want to use as an extension. See the 扩展范例 了解细节。

另请参阅

orientation() setExtension()

PySide2.QtWidgets.QDialog. setResult ( r ) ¶

参数

r – int

Sets the modal dialog’s result code to i .

注意

We recommend that you use one of the values defined by DialogCode .

另请参阅

result()

PySide2.QtWidgets.QDialog. setSizeGripEnabled ( arg__1 ) ¶

参数

arg__1 – bool

另请参阅

isSizeGripEnabled()

PySide2.QtWidgets.QDialog. showExtension ( arg__1 ) ¶

参数

arg__1 – bool

注意

此函数被弃用。

若 showIt is true, the dialog’s extension is shown; otherwise the extension is hidden.

Instead of using this functionality, we recommend that you simply call show() or hide() on the part of the dialog that you want to use as an extension. See the 扩展范例 了解细节。

另请参阅

show() setExtension() setOrientation()