Python PyQt5.QtCore 模块，QPropertyAnimation() 实例源码
我们从Python开源项目中，提取了以下8个代码示例，用于说明如何使用PyQt5.QtCore.QPropertyAnimation()。
def getDetailInfo(self):
"""??????????: ???????????"""
self.shortInfo.hide()
self.detailInfo.show()
self.showDetail = QPropertyAnimation(self, b"geometry")
x = self.pos().x()
y = self.pos().y()
self.showDetail.setStartValue(QRect(x, y, self.width(), self.height()))
# ???????????
self.showDetail.setEndValue(QRect(0, self.grandparent.header.height()+3, self.grandparent.width(), self.grandparent.mainContent.height()))
self.showDetail.setDuration(300)
self.showDetail.setEasingCurve(QEasingCurve.InBack)
self.showDetail.start(QAbstractAnimation.DeleteWhenStopped)
# ??????????????????????
self.raise_()
self.setDetailInfo()
def getShortInfo(self):
"""????????????"""
self.detailInfo.hide()
self.showShort = QPropertyAnimation(self, b"geometry")
x = self.pos().x()
y = self.pos().y()
self.showShort.setStartValue(QRect(0, self.grandparent.header.height(), self.grandparent.width(), self.grandparent.mainContent.height()))
self.showShort.setEndValue(QRect(0, self.grandparent.height()-64-self.parent.height(), self.grandparent.navigation.width(), 64))
self.showShort.setDuration(300)
self.showShort.setEasingCurve(QEasingCurve.InBack)
self.showShort.start(QAbstractAnimation.DeleteWhenStopped)
self.shortInfo.show()
self.raise_()
def startHiding(self):
self._hideTimer = None
if self._showState in [self.STATE_HIDING, self.STATE_HIDDEN]:
return
if self._showState == self.STATE_HIDING:
self._showAnimation.stop()
self._showState = self.STATE_HIDING
self._showAnimation = QtCore.QPropertyAnimation(self, b'windowOpacity')
self._showAnimation.setStartValue(self.windowOpacity())
self._showAnimation.setEndValue(0.0)
self._showAnimation.setDuration(500)
self._showAnimation.finished.connect(self._showAnimationFinished)
self._showAnimation.start()
def startShowing(self):
if self._showState in [self.STATE_SHOWING, self.STATE_SHOWN]:
return
if self._showState == self.STATE_SHOWING:
self._showAnimation.stop()
self._showState = self.STATE_SHOWING
self._showAnimation = QtCore.QPropertyAnimation(self, b'windowOpacity')
self._showAnimation.setStartValue(self.windowOpacity())
self._showAnimation.setEndValue(1.0)
self._showAnimation.setDuration(500)
self._showAnimation.finished.connect(self._showAnimationFinished)
self._showAnimation.start()
def _update_screen_rect(self):
if self._animation is not None and self._animation.state() == QAbstractAnimation.Running:
return
vertical_offset_bias = self._line_height - self._first_lyrics_line_y
vertical_offset = self._scroll_progress * \
(self._document_height - len(self._extra_lines_after) * self._line_height)
if vertical_offset <= vertical_offset_bias:
vertical_offset = 0
else:
vertical_offset = min(vertical_offset - vertical_offset_bias, self._document_height)
current_line_index = vertical_offset / self._line_height
extra_line_count = len(tuple(filter(lambda i: i < current_line_index, self._extra_lines_after)))
vertical_offset += self._line_height * extra_line_count
diff = self.sceneRect().y() - vertical_offset
if abs(diff) > self._line_height * self._line_increment:
factor = -int(diff) // int(self._line_height * self._line_increment)
y = self.sceneRect().y() + (self._line_height * self._line_increment) * factor
y = max(0, y)
target_rect = QRectF(0, y, self.w, self.h)
if not self._covered:
self._animation = QPropertyAnimation(self, b"sceneRect")
self._animation.setDuration(3000)
self._animation.setStartValue(self.sceneRect())
self._animation.setEndValue(target_rect)
self._animation.setEasingCurve(QEasingCurve.InOutQuad)
self._animation.start()
else:
self._animation = None
self.setSceneRect(target_rect)
def fade_in(self):
self.show()
self.raise_()
self._covered = False
self._document_cover_animation = QPropertyAnimation(self._document_cover, b"opacity")
self._document_cover_animation.setDuration(1000)
self._document_cover_animation.setStartValue(1)
self._document_cover_animation.setEndValue(0)
self._document_cover_animation.setEasingCurve(QEasingCurve.InOutQuad)
self._document_cover_animation.start()
def fade_out(self):
self._document_cover_animation = QPropertyAnimation(self._document_cover, b"opacity")
self._document_cover_animation.finished.connect(self._fade_out_finished)
self._document_cover_animation.setDuration(1000)
self._document_cover_animation.setStartValue(0)
self._document_cover_animation.setEndValue(1)
self._document_cover_animation.setEasingCurve(QEasingCurve.InOutQuad)
self._document_cover_animation.start()
def __init__(self, parent=None, title='', animation_duration=300):
"""
References:
# Adapted from c++ version
http://stackoverflow.com/questions/32476006/how-to-make-an-expandable-collapsable-section-widget-in-qt
"""
super(GroupWidget, self).__init__(parent=parent)
self.animation_duration = animation_duration
self.toggle_animation = QParallelAnimationGroup()
self.content_area = QScrollArea()
self.header_line = QFrame()
self.toggle_button = QToolButton()
self.main_layout = QGridLayout()
toggle_button = self.toggle_button
toggle_button.setStyleSheet("QToolButton { border: none; }")
toggle_button.setToolButtonStyle(Qt.ToolButtonTextBesideIcon)
toggle_button.setArrowType(Qt.RightArrow)
toggle_button.setText(str(title))
toggle_button.setCheckable(True)
toggle_button.setChecked(False)
header_line = self.header_line
header_line.setFrameShape(QFrame.HLine)
header_line.setFrameShadow(QFrame.Sunken)
header_line.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Maximum)
self.content_area.setStyleSheet("QScrollArea { background-color: white; border: none; }")
self.content_area.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
# start out collapsed
self.content_area.setMaximumHeight(0)
self.content_area.setMinimumHeight(0)
# let the entire widget grow and shrink with its content
toggle_animation = self.toggle_animation
toggle_animation.addAnimation(QPropertyAnimation(self, bytes("minimumHeight", "utf-8")))
toggle_animation.addAnimation(QPropertyAnimation(self, bytes("maximumHeight", "utf-8")))
toggle_animation.addAnimation(QPropertyAnimation(self.content_area, bytes("maximumHeight", "utf-8")))
# don't waste space
main_layout = self.main_layout
main_layout.setVerticalSpacing(0)
main_layout.setContentsMargins(0, 0, 0, 0)
row = 0
main_layout.addWidget(self.toggle_button, row, 0, 1, 1, Qt.AlignLeft)
main_layout.addWidget(self.header_line, row, 2, 1, 1)
row += 1
main_layout.addWidget(self.content_area, row, 0, 1, 3)
self.setLayout(self.main_layout)
def start_animation(checked):
arrow_type = Qt.DownArrow if checked else Qt.RightArrow
direction = QAbstractAnimation.Forward if checked else QAbstractAnimation.Backward
toggle_button.setArrowType(arrow_type)
self.toggle_animation.setDirection(direction)
self.toggle_animation.start()
self.toggle_button.clicked.connect(start_animation)