在实际显示小部件后如何更改sizeHint？

Question

我做了一个widgetAction。你知道吗

我将sizeHint (100, 30)设置为默认设置。你知道吗

我将widgetAction设置为QPushButton()的菜单

QPushButton由QVBoxLayout()对齐

所以，QPushButton的大小经常通过拉伸改变。。。正在调整大小。。。最小化。。。等等。你知道吗

但是widgetAction的标签没有改变。你知道吗

有没有办法在显示后更改sizeHint()的大小？你知道吗

我想将widgetAction的标签调整为QPushButton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

您的操作嵌入在QWidgetAction中。因此，还需要调整self.label_A的父小部件的大小。你知道吗

如果在UnderlineStyleLabel.mousePressEvent的末尾添加self.parent().resize(self.initial_size)行，标签的大小将调整得很好。你知道吗