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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from PySide6.QtCore import Property, QRunnable, Qt, Signal, Slot
from PySide6.QtQml import QmlElement
from PySide6.QtQuick import QQuickItem, QQuickWindow
from squirclerenderer import SquircleRenderer
# To be used on the @QmlElement decorator
# (QML_IMPORT_MINOR_VERSION is optional)
QML_IMPORT_NAME = "OpenGLUnderQML"
QML_IMPORT_MAJOR_VERSION = 1
class CleanupJob(QRunnable):
def __init__(self, renderer):
super().__init__()
self._renderer = renderer
def run(self):
del self._renderer
@QmlElement
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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