86 lines
3.8 KiB
Python
86 lines
3.8 KiB
Python
from PyQt5.QtCore import QParallelAnimationGroup, Qt, QPropertyAnimation, QAbstractAnimation
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from PyQt5.QtWidgets import QWidget, QFrame, QToolButton, QGridLayout, QSizePolicy, QLayout
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from rare.utils.misc import icon
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# https://newbedev.com/how-to-make-an-expandable-collapsable-section-widget-in-qt
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class CollabsibleWidget(QWidget):
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def __init__(
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self, child_layout: QLayout = None, title: str = "", animation_duration: int = 200, parent=None
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):
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"""
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References:
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# Adapted from c++ version
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https://stackoverflow.com/questions/32476006/how-to-make-an-expandable-collapsable-section-widget-in-qt
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"""
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super(CollabsibleWidget, self).__init__(parent=parent)
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self.animationDuration = animation_duration
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self.toggleAnimation = QParallelAnimationGroup()
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self.contentArea = QWidget()
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self.headerLine = QFrame()
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self.toggleButton = QToolButton()
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self.mainLayout = QGridLayout()
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toggleButton = self.toggleButton
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toggleButton.setToolButtonStyle(Qt.ToolButtonTextBesideIcon)
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toggleButton.setIcon(icon("fa.arrow-right"))
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toggleButton.setText(str(title))
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toggleButton.setCheckable(True)
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toggleButton.setChecked(False)
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headerLine = self.headerLine
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headerLine.setFrameShape(QFrame.StyledPanel)
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headerLine.setFrameShadow(QFrame.Plain)
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headerLine.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Maximum)
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self.contentArea.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
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# start out collapsed
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self.contentArea.setMaximumHeight(0)
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self.contentArea.setMinimumHeight(0)
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# let the entire widget grow and shrink with its content
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toggleAnimation = self.toggleAnimation
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toggleAnimation.addAnimation(QPropertyAnimation(self, b"minimumHeight"))
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toggleAnimation.addAnimation(QPropertyAnimation(self, b"maximumHeight"))
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toggleAnimation.addAnimation(QPropertyAnimation(self.contentArea, b"maximumHeight"))
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# don't waste space
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mainLayout = self.mainLayout
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mainLayout.setVerticalSpacing(0)
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mainLayout.setContentsMargins(0, 0, 0, 0)
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row = 0
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mainLayout.addWidget(self.toggleButton, row, 0, 1, 1, Qt.AlignLeft)
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mainLayout.addWidget(self.headerLine, row, 2, 1, 1)
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row += 1
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mainLayout.addWidget(self.contentArea, row, 0, 1, 3)
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self.setLayout(self.mainLayout)
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def start_animation(checked):
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arrow_type = icon("fa.arrow-down") if checked else icon("fa.arrow-right")
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direction = QAbstractAnimation.Forward if checked else QAbstractAnimation.Backward
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toggleButton.setIcon(arrow_type)
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self.toggleAnimation.setDirection(direction)
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self.toggleAnimation.start()
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self.toggleButton.clicked.connect(start_animation)
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if child_layout:
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self.setContentLayout(child_layout)
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def setContentLayout(self, content_layout: QLayout):
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# Not sure if this is equivalent to self.contentArea.destroy()
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self.contentArea.destroy()
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self.contentArea.setLayout(content_layout)
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collapsedHeight = self.sizeHint().height() - self.contentArea.maximumHeight()
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contentHeight = content_layout.sizeHint().height()
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for i in range(self.toggleAnimation.animationCount() - 1):
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spoilerAnimation = self.toggleAnimation.animationAt(i)
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spoilerAnimation.setDuration(self.animationDuration)
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spoilerAnimation.setStartValue(collapsedHeight)
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spoilerAnimation.setEndValue(collapsedHeight + contentHeight)
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contentAnimation = self.toggleAnimation.animationAt(self.toggleAnimation.animationCount() - 1)
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contentAnimation.setDuration(self.animationDuration)
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contentAnimation.setStartValue(0)
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contentAnimation.setEndValue(contentHeight)
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