Question

我希望---用Python和Qt4 ---来旋转QPushButton（或至少它的文本），使它可以垂直竖立。我见过some documentation online，但我无法理解它 - 它在C中，而且我是C-illiterate。

从我读过的内容来看，需要重新实现paintEvent()处理程序，实例化并旋转QPainter（）。然而，我无法弄清楚如何为我只需要的一个QString或QPushButton做这个。我假设QPaintEvent会有一个“发送者”属性，就像信号一样，但它没有。我似乎可以从这个事件得到的是QRect或QRegion。

如何查找特定于我的按钮或其标签的事件？
或者，因为这是真正的问题，如何旋转QPushButton？

Mru，下面提到了some C++ example，它完全重新实现了QPushButton。由于我对C ++没有任何线索，因为我不需要完全重新实现，所以我试图在Python中重新实现painEvent()处理程序。基于这个例子。

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_())

Answer 1

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_())

Answer 2

如果您希望此代码适用于＆＃34; east＆＃34;和＆＃34; west＆＃34;您应该使用的方向参数：

ini_set('xdebug.max_nesting_level', 200);

Answer 3

我知道这是在原帖后几年，但如果你只想让文字是垂直的而不是水平的，那么这是有效的。使用QTextDocument和一些HTML。添加

<br>

每封信后。

QTextDocument doc;
doc.setHtml("<p align=center><font>B<br>u<br>t<br>t<br>o<br>n</font></p>");
doc.setTextWidth(doc.size().width());

QPixmap pixmap(doc.size().width(), doc.size().height());
pixmap.fill( Qt::transparent );
QPainter painter(&pixmap);
doc.drawContents(&painter);

QPushButton button;
button->setIconSize(pixmap.size());
button->setIcon(pixmap);

如何旋转QPushButton？

3 个答案: