6

我想——使用 Python 和 Qt4——旋转QPushButton（或至少它的文本），以便它可以垂直站立。我在网上看过一些文档，但我无法理解它——它是用 C 语言编写的，我是 C 文盲。

从我读到的内容来看，需要重新实现paintEvent()处理程序，实例化和旋转QPainter()。但是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 会有一个“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。

如何找出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，在下面建议了一些 C++ 示例，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painEvent()根据该示例在 Python 中重新实现处理程序。

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_())
4

3 回答 3

6

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_())
于 2011-09-07T22:21:45.597 回答
2

如果您希望此代码同时适用于“东”和“西”方向参数，您应该使用：

#!/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)
        if self.orientation == "east":
            painter.rotate(270)
            painter.translate(-1 * self.height(), 0);
        if self.orientation == "west":
            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_())
于 2016-03-18T11:56:25.433 回答
2

我知道这是在原始帖子之后的几年，但如果你只是希望文本是垂直的而不是水平的，这很有效。使用 QTextDocument 和一些 HTML。添加

<br>

在每个字母之后。

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);
于 2016-09-10T21:25:28.257 回答