8ebcc3a700
Fixes a subtle bug that would cause increased CPU usage due to spawning multiple singleshot times with very short timeouts (15ms) until the Store tab was loaded.
56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
from PyQt5.QtCore import QEvent, QObject, Qt
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from PyQt5.QtGui import QShowEvent, QMovie
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from PyQt5.QtWidgets import QLabel
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class LoadingWidget(QLabel):
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def __init__(self, autostart=False, parent=None):
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super(LoadingWidget, self).__init__(parent=parent)
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self.setObjectName(type(self).__name__)
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self.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
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self.movie = QMovie(":/images/loader.webp", parent=self)
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# The animation's exact size is 94x94
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self.setFixedSize(96, 96)
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self.setMovie(self.movie)
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if self.parent() is not None:
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self.parent().installEventFilter(self)
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self.autostart = autostart
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def __center_on_parent(self):
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rect = self.rect()
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rect.moveCenter(self.parent().contentsRect().center())
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self.setGeometry(rect)
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def event(self, e: QEvent) -> bool:
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if e.type() == QEvent.ParentAboutToChange:
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if self.parent() is not None:
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self.parent().removeEventFilter(self)
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if e.type() == QEvent.ParentChange:
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if self.parent() is not None:
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self.parent().installEventFilter(self)
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return super().event(e)
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def showEvent(self, a0: QShowEvent) -> None:
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if a0.spontaneous():
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return super().showEvent(a0)
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if self.autostart:
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self.movie.start()
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self.autostart = False
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self.__center_on_parent()
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super().showEvent(a0)
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def eventFilter(self, a0: QObject, a1: QEvent) -> bool:
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if a0 is self.parent() and a1.type() == QEvent.Resize:
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self.__center_on_parent()
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return a0.event(a1)
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return False
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def start(self):
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self.setVisible(True)
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if not self.autostart:
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self.movie.start()
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def stop(self):
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self.setVisible(False)
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self.movie.stop()
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