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from __future__ import print_function

"""PySide2 port of the qml/tutorials/extending-qml/chapter3-bindings example from Qt v5.x"""

import sys, os
sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', '..', 'utils'))
from utils import text_type

from PySide2.QtCore import Property, Signal, Slot, QUrl, Qt
from PySide2.QtGui import QGuiApplication, QPen, QPainter, QColor
from PySide2.QtQml import qmlRegisterType
from PySide2.QtQuick import QQuickPaintedItem, QQuickView

class PieChart (QQuickPaintedItem):
    def __init__(self, parent = None):
        QQuickPaintedItem.__init__(self, parent)
        self._name = u''
        self._color = QColor()

    def paint(self, painter):
        pen = QPen(self._color, 2)
        painter.setPen(pen)
        painter.setRenderHints(QPainter.Antialiasing, True)
        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()

    def getName(self):
        return self._name

    def setName(self, value):
        self._name = value

    colorChanged = Signal()
    color = Property(QColor, getColor, setColor, notify=colorChanged)
    name = Property(text_type, getName, setName)
    chartCleared = Signal()

    @Slot() # This should be something like @Invokable
    def clearChart(self):
        self.setColor(Qt.transparent)
        self.update()
        self.chartCleared.emit()

if __name__ == '__main__':
    app = QGuiApplication(sys.argv)

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

    view = QQuickView()
    view.setResizeMode(QQuickView.SizeRootObjectToView)
    qmlFile = os.path.join(os.path.dirname(__file__), 'app.qml')
    view.setSource(QUrl.fromLocalFile(os.path.abspath(qmlFile)))
    if view.status() == QQuickView.Error:
        sys.exit(-1)
    view.show()
    res = app.exec_()
    # Deleting the view before it goes out of scope is required to make sure all child QML instances
    # are destroyed in the correct order.
    del view
    sys.exit(res)
