如何旋转QPushButton？

  • Z时代
  • 2024-01-10
  • 分类：问答

我想-使用Python和Qt4–

旋转QPushButton（或至少它的文本），使其可以垂直站立。我在网上看过一些文档，但是我从中没多大意义-

它在C语言中，而且我是C文盲。

根据我的阅读，需要重新实现paintEvent（）处理程序，实例化和旋转QPainter（）。但是我不知道怎么为我只需要的一个QString或QPushButton做到这一点。我假设QPaintEvent会像信号一样具有“发送者”属性，但实际上没有。我似乎可以从此事件中得到的只是QRect或QRegion。

如何找到特定于我的按钮或其标签的事件？

或者，因为这确实是问题，如何旋转QPushButton？

Mru，在下面提出了一些C ++示例，它完全重新实现了QPushButton。由于我对C

++一无所知，并且由于我实际上不需要完全重新实现painEvent()，因此基于该示例，我尝试在Python中重新实现处理程序。

这是我翻译的内容，但不起作用：\

#!/usr/bin/env python
from PyQt4 import QtGui, QtCore
import sys
class RotatedButton(QtGui.QPushButton):
    def __init__(self, text, parent, orientation = "west"):
        QtGui.QPushButton.__init__(self, text, parent)
        self.orientation = orientation
    def paintEvent(self, event):
        painter = QtGui.QStylePainter(self)
        if self.orientation == 'west':
            painter.rotate(90)
        elif self.orientation == 'east':
            painter.rotate(270)
        else:
            raise TypeError
        painter.drawControl(QtGui.QStyle.CE_PushButton, self.getSyleOptions())
    def getSyleOptions(self):
        options = QtGui.QStyleOptionButton()
        options.initFrom(self)        
        size = options.rect.size()
        size.transpose()
        options.rect.setSize(size)
        options.features = QtGui.QStyleOptionButton.None
        options.text = self.text()
        options.icon = self.icon()
        options.iconSize = self.iconSize()
        return options
class Main(QtGui.QFrame):
    def __init__(self):
        QtGui.QFrame.__init__(self)
        self.count = 0
        self.application = QtCore.QCoreApplication.instance()
        self.layout = QtGui.QHBoxLayout()
        self.button = RotatedButton("Hello", self, orientation="west")
        self.layout.addWidget(self.button)
        self.setLayout(self.layout)
if __name__ == '__main__':
    application = QtGui.QApplication(sys.argv)    
    application.main = Main()
    application.main.show()
    sys.exit(application.exec_())

回答：

根据您的代码：

#!/usr/bin/env python
from PyQt4 import QtGui, QtCore
import sys
class RotatedButton(QtGui.QPushButton):
    def __init__(self, text, parent, orientation = "west"):
        super(RotatedButton,self).__init__(text, parent)
        self.orientation = orientation
    def paintEvent(self, event):
        painter = QtGui.QStylePainter(self)
        painter.rotate(90)
        painter.translate(0, -1 * self.width());
        painter.drawControl(QtGui.QStyle.CE_PushButton, self.getSyleOptions())
    def minimumSizeHint(self):
        size = super(RotatedButton, self).minimumSizeHint()
        size.transpose()
        return size
    def sizeHint(self):
        size = super(RotatedButton, self).sizeHint()
        size.transpose()
        return size
    def getSyleOptions(self):
        options = QtGui.QStyleOptionButton()
        options.initFrom(self)
        size = options.rect.size()
        size.transpose()
        options.rect.setSize(size)
        options.features = QtGui.QStyleOptionButton.None
        if self.isFlat():
            options.features |= QtGui.QStyleOptionButton.Flat
        if self.menu():
            options.features |= QtGui.QStyleOptionButton.HasMenu
        if self.autoDefault() or self.isDefault():
            options.features |= QtGui.QStyleOptionButton.AutoDefaultButton
        if self.isDefault():
            options.features |= QtGui.QStyleOptionButton.DefaultButton
        if self.isDown() or (self.menu() and self.menu().isVisible()):
            options.state |= QtGui.QStyle.State_Sunken
        if self.isChecked():
            options.state |= QtGui.QStyle.State_On
        if not self.isFlat() and not self.isDown():
            options.state |= QtGui.QStyle.State_Raised
        options.text = self.text()
        options.icon = self.icon()
        options.iconSize = self.iconSize()
        return options
class Main(QtGui.QFrame):
    def __init__(self):
        QtGui.QFrame.__init__(self)
        self.application = QtCore.QCoreApplication.instance()
        self.layout = QtGui.QHBoxLayout()
        self.button = RotatedButton("Hello", self, orientation="west")
        self.layout.addWidget(self.button)
        self.setLayout(self.layout)
if __name__ == '__main__':
    application = QtGui.QApplication(sys.argv)
    application.main = Main()
    application.main.show()
    sys.exit(application.exec_())

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