如何旋转 QPushButton？
我想用 Python 和 Qt4 旋转 QPushButton（或至少其文本），以便它可以垂直站立。我看过一些在线文档，但我无法理解它——它是 C 语言，而我是 C 文盲。
根据我的阅读，需要重新实现 paintEvent()处理程序，实例化并旋转 QPainter()。然而，我不知道如何为我只需要的一个 QString 或 QPushButton 执行此操作。我假设 QPaintEvent 将有一个“发送者”属性，就像信号一样，但它没有。我似乎从这个事件中得到的只是一个 QRect 或 QRegion。
如何找到特定于我的按钮或其标签的事件？
或者，因为这确实是一个问题，如何旋转 QPushButton？
Mru，下面建议了一些 C++ 示例，其中完全重新实现 QPushButton。由于我对 C++ 一无所知，而且我并不真正需要完全重新实现，因此我尝试根据该示例在 Python 中重新实现 painEvent() 处理程序。
这是我翻译的，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_())
I would like---with Python and Qt4---to rotate a QPushButton (or at least its text) so it can stand vertically. I've seen some documentation online, but I couldn't make much sense out of it---it's in C and I'm C-illiterate.
From what I read though, one needs to re-implement the paintEvent() handler, instantiate and rotate a QPainter(). What I can't figure out however is how to do this for the one QString or QPushButton I need only. I assumed the QPaintEvent would have a "sender" attribute, like signals do, but it hasn't. All I can seem to get from this event is a QRect or QRegion.
How can I find out the event specific to my button or its label?
Or, because that's the question really, how to rotate a QPushButton?
Mru, here below suggested some C++ example, which reimplements the QPushButton completely. Since I have no clue about C++ and since I don't really need a full reimplementation, I've tried to reimplement the painEvent() handler in Python, based on that example.
Here is what I have translated, but it does not work :\
#!/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_())
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根据您的代码：
Based on your code:
如果您希望此代码适用于“东”和“西”方向参数，您应该使用以下代码：
If you want this code working for both "east" and "west" orientation arguments you should use this:
我知道这是在原始帖子发布几年后，但如果您只想让文本垂直而不是水平，那么这是有效的。使用 QTextDocument 和一些 HTML。 添加。
在每个字母后面
I know this is a few years after the original post but this works if you just want text to be vertical instead of horizontal. Use QTextDocument and some HTML. Add
after each letter.