Question

我正在为Maya开发一个PySide接口，我想知道是否可以为一个按钮定义一个NON RECTANGULAR可点击区域。

我尝试使用QPushButton并扩展QLabel对象以获取按钮行为，但是你知道是否可以获得包含带alpha通道的图片的按钮并使用该alpha来定义按钮的点击区域< /强>

如果你可以指导我如何解决这个问题，我会非常感激。提前谢谢。

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')

Answer 2

您可以通过捕捉按下/释放事件并使用图像中的像素值检查点击位置来确定小部件是否应该发出点击。

class CustomButton(QWidget):

    def __init__(self, parent, image):
        super(CustomButton, self).__init__(parent)
        self.image = image

    def sizeHint(self):
        return self.image.size()

    def mouseReleaseEvent(self, event):
        # Position of click within the button
        pos = event.pos()
        # Assuming button is the same exact size as image
        # get the pixel value of the click point.
        pixel = self.image.alphaChannel().pixel(pos)

        if pixel:
            # Good click, pass the event along, will trigger a clicked signal
            super(CustomButton, self).mouseReleaseEvent(event)
        else:
            # Bad click, ignore the event, no click signal
            event.ignore()

PyQt按钮单击区域（非矩形区域）

2 个答案: