动画拼贴示例#
动画拼贴示例可以动画化图形场景中的项目。
<!DOCTYPE RCC><RCC version="1.0">
<qresource>
<file>images/Time-For-Lunch-2.jpg</file>
<file>images/centered.png</file>
<file>images/ellipse.png</file>
<file>images/figure8.png</file>
<file>images/kinetic.png</file>
<file>images/random.png</file>
<file>images/tile.png</file>
</qresource>
</RCC>
# Copyright (C) 2010 Riverbank Computing Limited.
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import sys
import math
from PySide6.QtCore import (QEasingCurve, QObject, QParallelAnimationGroup,
QPointF, QPropertyAnimation, QRandomGenerator,
QRectF, QTimer, Qt, Property, Signal)
from PySide6.QtGui import (QBrush, QLinearGradient, QPainter,
QPainterPath, QPixmap, QTransform)
from PySide6.QtWidgets import (QApplication, QGraphicsItem, QGraphicsPixmapItem,
QGraphicsRectItem, QGraphicsScene, QGraphicsView,
QGraphicsWidget, QStyle)
from PySide6.QtStateMachine import QState, QStateMachine
import animatedtiles_rc # noqa: F401
# Deriving from more than one wrapped class is not supported, so we use
# composition and delegate the property.
class Pixmap(QObject):
def __init__(self, pix):
super().__init__()
self.pixmap_item = QGraphicsPixmapItem(pix)
self.pixmap_item.setCacheMode(QGraphicsItem.DeviceCoordinateCache)
def set_pos(self, pos):
self.pixmap_item.setPos(pos)
def get_pos(self):
return self.pixmap_item.pos()
pos = Property(QPointF, get_pos, set_pos)
class Button(QGraphicsWidget):
pressed = Signal()
def __init__(self, pixmap, parent=None):
super().__init__(parent)
self._pix = pixmap
self.setAcceptHoverEvents(True)
self.setCacheMode(QGraphicsItem.DeviceCoordinateCache)
def boundingRect(self):
return QRectF(-65, -65, 130, 130)
def shape(self):
path = QPainterPath()
path.addEllipse(self.boundingRect())
return path
def paint(self, painter, option, widget):
down = option.state & QStyle.State_Sunken
r = self.boundingRect()
grad = QLinearGradient(r.topLeft(), r.bottomRight())
if option.state & QStyle.State_MouseOver:
color_0 = Qt.white
else:
color_0 = Qt.lightGray
color_1 = Qt.darkGray
if down:
color_0, color_1 = color_1, color_0
grad.setColorAt(0, color_0)
grad.setColorAt(1, color_1)
painter.setPen(Qt.darkGray)
painter.setBrush(grad)
painter.drawEllipse(r)
color_0 = Qt.darkGray
color_1 = Qt.lightGray
if down:
color_0, color_1 = color_1, color_0
grad.setColorAt(0, color_0)
grad.setColorAt(1, color_1)
painter.setPen(Qt.NoPen)
painter.setBrush(grad)
if down:
painter.translate(2, 2)
painter.drawEllipse(r.adjusted(5, 5, -5, -5))
painter.drawPixmap(-self._pix.width() / 2, -self._pix.height() / 2,
self._pix)
def mousePressEvent(self, ev):
self.pressed.emit()
self.update()
def mouseReleaseEvent(self, ev):
self.update()
class View(QGraphicsView):
def resizeEvent(self, event):
super(View, self).resizeEvent(event)
self.fitInView(self.sceneRect(), Qt.KeepAspectRatio)
if __name__ == '__main__':
app = QApplication(sys.argv)
kinetic_pix = QPixmap(':/images/kinetic.png')
bg_pix = QPixmap(':/images/Time-For-Lunch-2.jpg')
scene = QGraphicsScene(-350, -350, 700, 700)
items = []
for i in range(64):
item = Pixmap(kinetic_pix)
item.pixmap_item.setOffset(-kinetic_pix.width() / 2,
-kinetic_pix.height() / 2)
item.pixmap_item.setZValue(i)
items.append(item)
scene.addItem(item.pixmap_item)
# Buttons.
button_parent = QGraphicsRectItem()
ellipse_button = Button(QPixmap(':/images/ellipse.png'), button_parent)
figure_8button = Button(QPixmap(':/images/figure8.png'), button_parent)
random_button = Button(QPixmap(':/images/random.png'), button_parent)
tiled_button = Button(QPixmap(':/images/tile.png'), button_parent)
centered_button = Button(QPixmap(':/images/centered.png'), button_parent)
ellipse_button.setPos(-100, -100)
figure_8button.setPos(100, -100)
random_button.setPos(0, 0)
tiled_button.setPos(-100, 100)
centered_button.setPos(100, 100)
scene.addItem(button_parent)
button_parent.setTransform(QTransform().scale(0.75, 0.75))
button_parent.setPos(200, 200)
button_parent.setZValue(65)
# States.
root_state = QState()
ellipse_state = QState(root_state)
figure_8state = QState(root_state)
random_state = QState(root_state)
tiled_state = QState(root_state)
centered_state = QState(root_state)
# Values.
generator = QRandomGenerator.global_()
for i, item in enumerate(items):
# Ellipse.
ellipse_state.assignProperty(item, 'pos',
QPointF(math.cos((i / 63.0) * 6.28) * 250,
math.sin((i / 63.0) * 6.28) * 250))
# Figure 8.
figure_8state.assignProperty(item, 'pos',
QPointF(math.sin((i / 63.0) * 6.28) * 250,
math.sin(((i * 2) / 63.0) * 6.28) * 250))
# Random.
random_state.assignProperty(item, 'pos',
QPointF(-250 + generator.bounded(0, 500),
-250 + generator.bounded(0, 500)))
# Tiled.
width = kinetic_pix.width()
height = kinetic_pix.height()
tiled_state.assignProperty(item, 'pos',
QPointF(((i % 8) - 4) * width + width / 2,
((i // 8) - 4) * height + height / 2))
# Centered.
centered_state.assignProperty(item, 'pos', QPointF())
# Ui.
view = View(scene)
view.setWindowTitle("Animated Tiles")
view.setViewportUpdateMode(QGraphicsView.BoundingRectViewportUpdate)
view.setBackgroundBrush(QBrush(bg_pix))
view.setCacheMode(QGraphicsView.CacheBackground)
view.setRenderHints(QPainter.Antialiasing | QPainter.SmoothPixmapTransform)
view.show()
states = QStateMachine()
states.addState(root_state)
states.setInitialState(root_state)
root_state.setInitialState(centered_state)
group = QParallelAnimationGroup()
for i, item in enumerate(items):
anim = QPropertyAnimation(item, b'pos')
anim.setDuration(750 + i * 25)
anim.setEasingCurve(QEasingCurve.InOutBack)
group.addAnimation(anim)
trans = root_state.addTransition(ellipse_button.pressed, ellipse_state)
trans.addAnimation(group)
trans = root_state.addTransition(figure_8button.pressed, figure_8state)
trans.addAnimation(group)
trans = root_state.addTransition(random_button.pressed, random_state)
trans.addAnimation(group)
trans = root_state.addTransition(tiled_button.pressed, tiled_state)
trans.addAnimation(group)
trans = root_state.addTransition(centered_button.pressed, centered_state)
trans.addAnimation(group)
timer = QTimer()
timer.start(125)
timer.setSingleShot(True)
trans = root_state.addTransition(timer.timeout, ellipse_state)
trans.addAnimation(group)
states.start()
sys.exit(app.exec())