如何在实际显示小部件后更改 sizeHint？

Question

我做了一个widgetAction.

我将 sizeHint (100, 30) 设置为默认设置。

我把widgetAction设为QPushButton()的菜单

QPushButton 按 QVBoxLayout()

对齐

因此，QPushButton 的大小通常会通过拉伸...调整大小...最小化...等方式进行更改。

但是widgetAction的标签没有改变。

有没有办法在 sizeHint() 显示后改变它的大小？

我想将 widgetAction 的标签大小调整为与 QPushButton

相同的大小

from PySide import QtGui
from PySide import QtCore
import sys
class Window(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(Window, self).__init__(parent)
        self.menubar = QtGui.QMenuBar()
        self.a_menu = QtGui.QMenu("a-menu")  
        self.label_A = UnderlineStyleLabel(self.a_menu,QtGui.QTextCharFormat.WaveUnderline)        
        self.widgetAction = QtGui.QWidgetAction(self.a_menu)
        self.widgetAction.createWidget(self.label_A)
        self.widgetAction.setDefaultWidget(self.label_A)
        self.a_menu.addAction(self.widgetAction)        
        self.menubar.addMenu(self.a_menu)
        self.setMenuBar(self.menubar)
        self.show()   
class UnderlineStyleLabel(QtGui.QWidget):
    def __init__(self,parent=None,underlineStyle=QtGui.QTextCharFormat.NoUnderline):
        super(UnderlineStyleLabel, self).__init__(parent=None)
        self.setParent(parent)
        self.pen_linepath = QtGui.QPainterPath(QtCore.QPointF(0, 0))        
        self.pen_linepath.lineTo(100, 0)
        self.underlineStyle = underlineStyle
        self.initial_size = QtCore.QSize(100, 30)
    def sizeHint(self):
        return self.initial_size
    def mousePressEvent(self, event):
        self.initial_size = QtCore.QSize(200,30)
        print("mousePressEvent pressed! please change the size!")
    def paintEvent(self,event):
        pen = QtGui.QPen()
        if self.underlineStyle == QtGui.QTextCharFormat.WaveUnderline:
            pen = QtGui.QPen()
            pen.setStyle(QtCore.Qt.PenStyle.SolidLine)
            pen.setWidth(10)
            pen.setColor(QtCore.Qt.black)
            painter = QtGui.QPainter()
            if not painter.isActive():
                painter.begin(self)
            painter.setPen(pen)
            painter.setRenderHint(QtGui.QPainter.RenderHint.Antialiasing)
            painter.drawArc(10, 10, 10, 10, 480, 1920)
            painter.drawArc(20, 7, 10, 10, -480, -1920)
            painter.drawArc(30, 10, 10, 10, 480, 1920)
            painter.drawArc(40, 7, 10, 10, -480, -1920)
            painter.drawArc(50, 10, 10, 10, 480, 1920)
            painter.drawArc(60, 7, 10, 10, -480, -1920)
            painter.end()
        return QtGui.QWidget.paintEvent(self,event)
def main():

    try:
        QtGui.QApplication([])
    except Exception as e:
        print(18,e)
    w = Window()
    sys.exit(QtGui.QApplication.exec_())
if __name__ == "__main__":
    main()

Answer 1

您的操作已嵌入 QWidgetAction。因此，您还需要调整 self.label_A 的父窗口小部件的大小。

如果在 UnderlineStyleLabel.mousePressEvent 末尾添加 self.parent().resize(self.initial_size) 行，标签将调整大小。

如何在实际显示小部件后更改 sizeHint？

How to change sizeHint after showing widgets in actual?

python

python-3.x

pyside