#############################################################################
##
## Copyright (C) 2017 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the test suite of Qt for Python.
##
## $QT_BEGIN_LICENSE:GPL-EXCEPT$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3 as published by the Free Software
## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
## included in the packaging of this file. Please review the following
## information to ensure the GNU General Public License requirements will
## be met: https://www.gnu.org/licenses/gpl-3.0.html.
##
## $QT_END_LICENSE$
##
#############################################################################

'''Unit test for QBackingStore, QRasterWindow and QStaticText'''

import os
import sys
import unittest

sys.path.append(os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "util"))

from helper.usesqapplication import UsesQApplication
from PySide2.QtCore import QEvent, QPoint, QRect, QSize, QTimer, Qt
from PySide2.QtGui import QColor, QBackingStore, QPaintDevice, QPainter, QWindow, QPaintDeviceWindow, QRasterWindow, QRegion, QStaticText

# QWindow rendering via QBackingStore
class TestBackingStoreWindow(QWindow):
    def __init__(self):
        super(TestBackingStoreWindow, self).__init__()
        self.backingStore = QBackingStore(self)
        self.text = QStaticText("BackingStoreWindow")

    def event(self, event):
        if event.type() == QEvent.Resize:
            self.backingStore.resize(self.size())
            self.render()
        elif event.type() == QEvent.UpdateRequest or event.type() == QEvent.Expose:
            self.backingStore.flush(QRegion(QRect(QPoint(0, 0), self.size())))

        return QWindow.event(self, event)

    def render(self):
        clientRect = QRect(QPoint(0, 0), self.size())
        painter = QPainter(self.backingStore.paintDevice())
        painter.fillRect(clientRect, QColor(Qt.green))
        painter.drawStaticText(QPoint(10, 10), self.text)

# Window using convenience class QRasterWindow
class TestRasterWindow(QRasterWindow):
    def __init__(self):
        super(TestRasterWindow, self).__init__()
        self.text = QStaticText("QRasterWindow")

    def paintEvent(self, event):
        clientRect = QRect(QPoint(0, 0), self.size())
        painter = QPainter(self)
        painter.fillRect(clientRect, QColor(Qt.red))
        painter.drawStaticText(QPoint(10, 10), self.text)

class QRasterWindowTest(UsesQApplication):
    def test(self):
        rasterWindow = TestRasterWindow()
        rasterWindow.setFramePosition(QPoint(100, 100))
        rasterWindow.resize(QSize(400, 400))
        rasterWindow.show()
        backingStoreWindow = TestBackingStoreWindow()
        backingStoreWindow.setFramePosition(QPoint(600, 100))
        backingStoreWindow.resize(QSize(400, 400))
        backingStoreWindow.show()

        QTimer.singleShot(100, self.app.quit)
        self.app.exec_()

if __name__ == '__main__':
    unittest.main()