50 lines
1.6 KiB
Python
50 lines
1.6 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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if autostart:
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self.movie.start()
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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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self.__center_on_parent()
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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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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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