如何在 PyQt 中将 QRubberBand 与 QRect 类一起使用？

Question

我想在 PyQt 中使用 QrubberBand 和 QRect 在 UI 中通过选取框矩形选择来选择或激活一堆按钮。

如果有人能告诉我如何实现此功能，我将不胜感激？

Answer 1

这是一个简单的演示：

from PyQt4 import QtGui, QtCore

class Window(QtGui.QWidget):
    def __init__(self):
        QtGui.QWidget.__init__(self)
        layout = QtGui.QVBoxLayout(self)
        layout.setMargin(15)
        layout.setSpacing(10)
        for text in 'One Two Three Four Five'.split():
            layout.addWidget(QtGui.QPushButton(text, self))
        self.rubberband = QtGui.QRubberBand(
            QtGui.QRubberBand.Rectangle, self)
        self.setMouseTracking(True)

    def mousePressEvent(self, event):
        self.origin = event.pos()
        self.rubberband.setGeometry(
            QtCore.QRect(self.origin, QtCore.QSize()))
        self.rubberband.show()
        QtGui.QWidget.mousePressEvent(self, event)

    def mouseMoveEvent(self, event):
        if self.rubberband.isVisible():
            self.rubberband.setGeometry(
                QtCore.QRect(self.origin, event.pos()).normalized())
        QtGui.QWidget.mouseMoveEvent(self, event)

    def mouseReleaseEvent(self, event):
        if self.rubberband.isVisible():
            self.rubberband.hide()
            selected = []
            rect = self.rubberband.geometry()
            for child in self.findChildren(QtGui.QPushButton):
                if rect.intersects(child.geometry()):
                    selected.append(child)
            print 'Selection Contains:\n ',
            if selected:
                print '  '.join(
                    'Button: %s\n' % child.text() for child in selected)
            else:
                print ' Nothing\n'
        QtGui.QWidget.mouseReleaseEvent(self, event)

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())