button - PyQt按钮点击区域(非矩形区域)

Question

我正在为 Maya 开发 PySide 界面，我想知道是否可以为按钮定义一个非矩形可点击区域。

我尝试使用 QPushButton 并扩展 QLabel 对象以获得按钮行为，但你知道是否有可能获得包含带有 alpha channel 的图片的按钮并使用该 alpha 定义按钮的点击区域?

如果你能指导我解决这个问题，我将不胜感激。提前致谢。

我试过这个...

from PySide import QtCore
from PySide import QtGui 

class QLabelButton(QtGui.QLabel):

    def __init(self, parent):
        QtGui.QLabel.__init__(self, parent)

    def mousePressEvent(self, ev):
        self.emit(QtCore.SIGNAL('clicked()'))

class CustomButton(QtGui.QWidget):
    def __init__(self, parent=None, *args):
        super(CustomButton, self).__init__(parent)
        self.setMinimumSize(300, 350)
        self.setMaximumSize(300, 350)

        picture = __file__.replace('qbtn.py', '') + 'mario.png'
        self.button = QLabelButton(self)
        self.button.setPixmap(QtGui.QPixmap(picture))
        self.button.setScaledContents(True)

        self.connect(self.button, QtCore.SIGNAL('clicked()'), self.onClick)

    def onClick(self):
        print('Button was clicked')


if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = CustomButton()
    win.show()
    app.exec_()
    sys.exit()

mario.png

Answer 1

这是我解决上述问题的最终代码...

from PySide import QtCore 
from PySide import QtGui 


class QLabelButton(QtGui.QLabel):

    def __init(self, parent):
        QtGui.QLabel.__init__(self, parent)

    def mousePressEvent(self, ev):
        self.emit(QtCore.SIGNAL('clicked()'))

class CustomButton(QtGui.QWidget):
    def __init__(self, parent=None, *args):
        super(CustomButton, self).__init__(parent)
        self.setMinimumSize(300, 350)
        self.setMaximumSize(300, 350)

        pixmap = QtGui.QPixmap('D:\mario.png')

        self.button = QLabelButton(self)
        self.button.setPixmap(pixmap)
        self.button.setScaledContents(True)
        self.button.setMask(pixmap.mask()) # THIS DOES THE MAGIC

        self.connect(self.button, QtCore.SIGNAL('clicked()'), self.onClick)

    def onClick(self):
        print('Button was clicked')