QStatusBar ¶

概要 ¶

详细描述 ¶

Each status indicator falls into one of three categories:

• Temporary - briefly occupies most of the status bar. Used to explain tool tip texts or menu entries, for example.

• Normal - occupies part of the status bar and may be hidden by temporary messages. Used to display the page and line number in a word processor, for example.

• Permanent - is never hidden. Used for important mode indications, for example, some applications put a Caps Lock indicator in the status bar.

QStatusBar lets you display all three types of indicators.

Typically, a request for the status bar functionality occurs in relation to a QMainWindow 对象。 QMainWindow provides a main application window, with a menu bar, tool bars, dock widgets and a status bar around a large central widget. The status bar can be retrieved using the statusBar() function, and replaced using the setStatusBar() 函数。

使用 showMessage() slot to display a temporary message:

def createStatusBar(self):
    statusBar().showMessage(tr("Ready"))
											

To remove a temporary message, use the clearMessage() slot, or set a time limit when calling showMessage() 。例如：

def print(self)
    document = textEdit.document()
    printer = QPrinter()
    dlg =  QPrintDialog(&printer, self)
    if dlg.exec() != QDialog.Accepted:
        return
    document.print(printer)
    statusBar().showMessage(tr("Ready"), 2000)
											

使用 currentMessage() function to retrieve the temporary message currently shown. The QStatusBar class also provide the messageChanged() signal which is emitted whenever the temporary status message changes.

Normal and Permanent messages are displayed by creating a small widget ( QLabel , QProgressBar or even QToolButton ) and then adding it to the status bar using the addWidget() 或 addPermanentWidget() function. Use the removeWidget() function to remove such messages from the status bar.

statusBar().addWidget(MyReadWriteIndication())
											

默认情况下 QStatusBar 提供 QSizeGrip in the lower-right corner. You can disable it using the setSizeGripEnabled() function. Use the isSizeGripEnabled() function to determine the current status of the size grip.

另请参阅

QMainWindow QStatusTipEvent GUI Design Handbook: Status Bar 应用程序范例

class QStatusBar ( [ parent=None ] ) ¶

param parent

QWidget

Constructs a status bar with a size grip and the given parent .

另请参阅

setSizeGripEnabled()

PySide2.QtWidgets.QStatusBar. addPermanentWidget ( widget [ , stretch=0 ] ) ¶

参数

• widget – QWidget

• stretch – int

添加给定 widget permanently to this status bar, reparenting the widget if it isn’t already a child of this QStatusBar 对象。 stretch parameter is used to compute a suitable size for the given widget as the status bar grows and shrinks. The default stretch factor is 0, i.e giving the widget a minimum of space.

Permanently means that the widget may not be obscured by temporary messages. It is is located at the far right of the status bar.

另请参阅

insertPermanentWidget() removeWidget() addWidget()

PySide2.QtWidgets.QStatusBar. addWidget ( widget [ , stretch=0 ] ) ¶

参数

• widget – QWidget

• stretch – int

添加给定 widget to this status bar, reparenting the widget if it isn’t already a child of this QStatusBar 对象。 stretch parameter is used to compute a suitable size for the given widget as the status bar grows and shrinks. The default stretch factor is 0, i.e giving the widget a minimum of space.

The widget is located to the far left of the first permanent widget (see addPermanentWidget() ) and may be obscured by temporary messages.

另请参阅

insertWidget() removeWidget() addPermanentWidget()

PySide2.QtWidgets.QStatusBar. clearMessage ( ) ¶

Removes any temporary message being shown.

另请参阅

currentMessage() showMessage() removeWidget()

PySide2.QtWidgets.QStatusBar. currentMessage ( ) ¶

返回类型

unicode

Returns the temporary message currently shown, or an empty string if there is no such message.

另请参阅

showMessage()

PySide2.QtWidgets.QStatusBar. hideOrShow ( ) ¶

Ensures that the right widgets are visible.

Used by the showMessage() and clearMessage() 函数。

PySide2.QtWidgets.QStatusBar. insertPermanentWidget ( index , widget [ , stretch=0 ] ) ¶

参数

• index – int

• widget – QWidget

• stretch – int

返回类型

int

Inserts the given widget at the given index permanently to this status bar, reparenting the widget if it isn’t already a child of this QStatusBar object. If index is out of range, the widget is appended (in which case it is the actual index of the widget that is returned).

stretch parameter is used to compute a suitable size for the given widget as the status bar grows and shrinks. The default stretch factor is 0, i.e giving the widget a minimum of space.

Permanently means that the widget may not be obscured by temporary messages. It is is located at the far right of the status bar.

另请参阅

addPermanentWidget() removeWidget() addWidget()

PySide2.QtWidgets.QStatusBar. insertWidget ( index , widget [ , stretch=0 ] ) ¶

参数

• index – int

• widget – QWidget

• stretch – int

返回类型

int

Inserts the given widget at the given index to this status bar, reparenting the widget if it isn’t already a child of this QStatusBar object. If index is out of range, the widget is appended (in which case it is the actual index of the widget that is returned).

stretch parameter is used to compute a suitable size for the given widget as the status bar grows and shrinks. The default stretch factor is 0, i.e giving the widget a minimum of space.

The widget is located to the far left of the first permanent widget (see addPermanentWidget() ) and may be obscured by temporary messages.

另请参阅

addWidget() removeWidget() addPermanentWidget()

PySide2.QtWidgets.QStatusBar. isSizeGripEnabled ( ) ¶

返回类型

bool

PySide2.QtWidgets.QStatusBar. messageChanged ( text ) ¶

参数

text – unicode

PySide2.QtWidgets.QStatusBar. reformat ( ) ¶

Changes the status bar’s appearance to account for item changes.

Special subclasses may need this function, but geometry management will usually take care of any necessary rearrangements.

PySide2.QtWidgets.QStatusBar. removeWidget ( widget ) ¶

参数

widget – QWidget

移除指定 widget from the status bar.

注意

This function does not delete the widget but hides it. To add the widget again, you must call both the addWidget() and show() 函数。

另请参阅

addWidget() addPermanentWidget() clearMessage()

PySide2.QtWidgets.QStatusBar. setSizeGripEnabled ( arg__1 ) ¶

参数

arg__1 – bool

另请参阅

isSizeGripEnabled()

PySide2.QtWidgets.QStatusBar. showMessage ( text [ , timeout=0 ] ) ¶

参数

• text – unicode

• timeout – int

Hides the normal status indications and displays the given message for the specified number of milli-seconds ( timeout )。若 timeout is 0 (default), the message remains displayed until the clearMessage() slot is called or until the slot is called again to change the message.

Note that is called to show temporary explanations of tool tip texts, so passing a timeout of 0 is not sufficient to display a permanent message .

另请参阅

messageChanged() currentMessage() clearMessage()