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#############################################################################
##
## Copyright (C) 2021 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of The Qt Company Ltd nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################
from PySide6.QtCore import Property, QRunnable, Qt, Signal, Slot
from PySide6.QtQuick import QQuickItem, QQuickWindow
from squirclerenderer import SquircleRenderer
class CleanupJob(QRunnable):
def __init__(self, renderer):
super().__init__()
self._renderer = renderer
def run(self):
del self._renderer
class Squircle(QQuickItem):
tChanged = Signal()
def __init__(self, parent=None):
super().__init__(parent)
self._t = 0.0
self._renderer = None
self.windowChanged.connect(self.handleWindowChanged)
def t(self):
return self._t
def setT(self, value):
if self._t == value:
return
self._t = value
self.tChanged.emit()
if self.window():
self.window().update()
@Slot(QQuickWindow)
def handleWindowChanged(self, win):
if win:
win.beforeSynchronizing.connect(self.sync, type=Qt.DirectConnection)
win.sceneGraphInvalidated.connect(self.cleanup, type=Qt.DirectConnection)
win.setColor(Qt.black)
self.sync()
@Slot()
def cleanup(self):
del self._renderer
self._renderer = None
@Slot()
def sync(self):
window = self.window()
if not self._renderer:
self._renderer = SquircleRenderer()
window.beforeRendering.connect(self._renderer.init, Qt.DirectConnection)
window.beforeRenderPassRecording.connect(
self._renderer.paint, Qt.DirectConnection
)
self._renderer.setViewportSize(window.size() * window.devicePixelRatio())
self._renderer.setT(self._t)
self._renderer.setWindow(window)
def releaseResources(self):
self.window().scheduleRenderJob(
CleanupJob(self._renderer), QQuickWindow.BeforeSynchronizingStage
)
self._renderer = None
t = Property(float, t, setT, notify=tChanged)
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