我想用 Python 和 Qt4 来旋转 QPushButton (或至少它的文字)所以它可以垂直站立。我看过some documentation online , 但我无法从中得到太多意义——它是用 C 写的，而我是 C 文盲。
不过根据我的阅读，需要重新实现 paintEvent()处理程序，实例化和旋转 QPainter()。然而，我想不通的是如何为我只需要的一个 QString 或 QPushButton 执行此操作。我假设 QPaintEvent 会有一个“发送者”属性，就像信号一样，但它没有。从这个事件中我似乎只能得到一个 QRect 或 QRegion。
如何找到特定于我的按钮或其标签的事件？
或者，因为这确实是个问题，如何旋转 QPushButton？
Mru，下面建议some C++ example ，它完全重新实现了 QPushButton。由于我对 C++ 一无所知，而且我真的不需要完全重新实现，因此我尝试基于该示例在 Python 中重新实现 painEvent() 处理程序。
这是我翻译的内容，但它不起作用:\
#!/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_())
最佳答案
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_())
关于python - 如何旋转 QPushButton？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/7339685/