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collapsible_box.py
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collapsible_box.py
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"""
This file is part of Fish Tracker.
Copyright 2021, VTT Technical research centre of Finland Ltd.
Developed by: Mikael Uimonen.
Fish Tracker is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Fish Tracker is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Fish Tracker. If not, see <https://www.gnu.org/licenses/>.
"""
from PyQt5 import QtCore, QtGui, QtWidgets
class CollapsibleBox(QtWidgets.QWidget):
"""
UI element that can be collapsed/expanded to hide/show the contents.
"""
def __init__(self, title="", parent=None):
super(CollapsibleBox, self).__init__(parent)
self.animation_duration = 150
self.checked = False
self.toggle_button = QtWidgets.QToolButton(text=title, checkable=False, checked=False)
self.toggle_button.setStyleSheet("QToolButton { border: none; }")
self.toggle_button.setToolButtonStyle(QtCore.Qt.ToolButtonTextBesideIcon)
self.toggle_button.setArrowType(QtCore.Qt.RightArrow)
self.toggle_button.pressed.connect(self.onPressed)
self.toggle_button.setAutoRepeat(False)
self.toggle_animation = QtCore.QParallelAnimationGroup(self)
self.content_area = QtWidgets.QScrollArea(maximumHeight=0, minimumHeight=0)
self.content_area.setSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Fixed)
self.content_area.setFrameShape(QtWidgets.QFrame.NoFrame)
lay = QtWidgets.QVBoxLayout(self)
lay.setSpacing(0)
lay.setContentsMargins(0, 0, 0, 0)
lay.addWidget(self.toggle_button)
lay.addWidget(self.content_area)
self.toggle_animation.addAnimation(QtCore.QPropertyAnimation(self, b"minimumHeight"))
self.toggle_animation.addAnimation(QtCore.QPropertyAnimation(self, b"maximumHeight"))
self.toggle_animation.addAnimation(QtCore.QPropertyAnimation(self.content_area, b"maximumHeight"))
@QtCore.pyqtSlot()
def onPressed(self):
self.toggle_button.setArrowType(QtCore.Qt.DownArrow if not self.checked else QtCore.Qt.RightArrow)
dir = QtCore.QAbstractAnimation.Forward if not self.checked else QtCore.QAbstractAnimation.Backward
self.toggle_animation.setDirection(dir)
self.toggle_animation.start()
self.checked = not self.checked
def setContentLayout(self, layout):
lay = self.content_area.layout()
del lay
self.content_area.setLayout(layout)
collapsed_height = (self.sizeHint().height() - self.content_area.maximumHeight())
content_height = layout.sizeHint().height()
for i in range(self.toggle_animation.animationCount()):
animation = self.toggle_animation.animationAt(i)
animation.setDuration(self.animation_duration)
animation.setStartValue(collapsed_height)
animation.setEndValue(collapsed_height + content_height)
content_animation = self.toggle_animation.animationAt(self.toggle_animation.animationCount() - 1)
content_animation.setDuration(self.animation_duration)
content_animation.setStartValue(0)
content_animation.setEndValue(content_height)
if __name__ == "__main__":
import sys
import random
app = QtWidgets.QApplication(sys.argv)
w = QtWidgets.QMainWindow()
content = QtWidgets.QWidget()
w.setCentralWidget(content)
layout = QtWidgets.QVBoxLayout(content)
for i in range(10):
box = CollapsibleBox("Header-{}".format(i))
box.animation_duration = 100*i
layout.addWidget(box)
lay = QtWidgets.QVBoxLayout()
for j in range(8):
label = QtWidgets.QLabel("{}".format(j))
color = QtGui.QColor(*[random.randint(0, 255) for _ in range(3)])
label.setStyleSheet(
"background-color: {}; color : white;".format(color.name())
)
label.setAlignment(QtCore.Qt.AlignCenter)
lay.addWidget(label)
box.setContentLayout(lay)
layout.addStretch()
w.resize(640, 480)
w.show()
sys.exit(app.exec_())