basicdrawing.py 文件源码

def brushChanged(self):
        style = Qt.BrushStyle(self.brushStyleComboBox.itemData(
                self.brushStyleComboBox.currentIndex(), IdRole))

        if style == Qt.LinearGradientPattern:
            linearGradient = QLinearGradient(0, 0, 100, 100)
            linearGradient.setColorAt(0.0, Qt.white)
            linearGradient.setColorAt(0.2, Qt.green)
            linearGradient.setColorAt(1.0, Qt.black)
            self.renderArea.setBrush(QBrush(linearGradient))
        elif style == Qt.RadialGradientPattern:
            radialGradient = QRadialGradient(50, 50, 50, 70, 70)
            radialGradient.setColorAt(0.0, Qt.white)
            radialGradient.setColorAt(0.2, Qt.green)
            radialGradient.setColorAt(1.0, Qt.black)
            self.renderArea.setBrush(QBrush(radialGradient))
        elif style == Qt.ConicalGradientPattern:
            conicalGradient = QConicalGradient(50, 50, 150)
            conicalGradient.setColorAt(0.0, Qt.white)
            conicalGradient.setColorAt(0.2, Qt.green)
            conicalGradient.setColorAt(1.0, Qt.black)
            self.renderArea.setBrush(QBrush(conicalGradient))
        elif style == Qt.TexturePattern:
            self.renderArea.setBrush(QBrush(QPixmap(':/images/brick.png')))
        else:
            self.renderArea.setBrush(QBrush(Qt.green, style))