QML と Qt for Python の連携

app = QGuiApplication(sys.argv)

view = QQuickView()

view.setResizeMode(QQuickView.SizeRootObjectToView)

current_path = os.path.abspath(os.path.dirname(__file__))

qml_file = os.path.join(current_path, 'app.qml')

view.setSource(QUrl.fromLocalFile(qmlFile))

if view.status() == QQuickView.Error:

    sys.exit(-1)

view.show()

res = app.exec_()

del view

sys.exit(res)

import QtQuick 2.0
Text {

    text : 'Hello, world!'

}

class PieChart (QQuickPaintedItem):

    def __init__(self, parent = None):

        QQuickPaintedItem.__init__(self, parent)

        self.color = QColor()
    def paint(self, painter):

        pen = QPen(self.color, 2)

        painter.setPen(pen);

        painter.setRenderHints(QPainter.Antialiasing, True);

        # From drawPie(const QRect &rect, int startAngle, int spanAngle)

        painter.drawPie(self.boundingRect().adjusted(1,1,-1,-1),

            90 * 16, 290 * 16);
    def getColor(self):

        return self.color
    def setColor(self, value):

        if value != self.color:

            self.color = value

            self.update()

            self.colorChanged.emit()
    colorChanged = Signal()

    color = Property(QColor, getColor, setColor, notify=colorChanged)

qmlRegisterType(PieChart, 'Charts', 1, 0, 'PieChart');

import Charts 1.0

import QtQuick 2.0
Item {

    width: 300; height: 200
    PieChart {

        id: chartA

        width: 100; height: 100

        color: "red"

        anchors.centerIn:parent

    }
    MouseArea {

        anchors.fill: parent

        onClicked: { chartA.color = "blue" }

    }
    Text {

        anchors {

            bottom: parent.bottom;

            horizontalCenter: parent.horizontalCenter;

            bottomMargin: 20

        }

        text: "Click anywhere to change the chart color"

    }

}