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#############################################################################
##
## Copyright (C) 2010 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:LGPL$
## Commercial Usage
## Licensees holding valid Qt Commercial licenses may use this file in
## accordance with the Qt Commercial License Agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and Nokia.
##
## GNU Lesser General Public License Usage
## Alternatively, this file may be used under the terms of the GNU Lesser
## General Public License version 2.1 as published by the Free Software
## Foundation and appearing in the file LICENSE.LGPL included in the
## packaging of this file. Please review the following information to
## ensure the GNU Lesser General Public License version 2.1 requirements
## will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
##
## In addition, as a special exception, Nokia gives you certain additional
## rights. These rights are described in the Nokia Qt LGPL Exception
## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
##
## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3.0 as published by the Free Software
## Foundation and appearing in the file LICENSE.GPL included in the
## packaging of this file. Please review the following information to
## ensure the GNU General Public License version 3.0 requirements will be
## met: http://www.gnu.org/copyleft/gpl.html.
##
## If you have questions regarding the use of this file, please contact
## Nokia at qt-info@nokia.com.
## $QT_END_LICENSE$
##
#############################################################################
from PyQt4 import QtCore, QtGui
from colors import Colors
class DemoItemAnimation(QtGui.QGraphicsItemAnimation):
ANIM_IN, ANIM_OUT, ANIM_UNSPECIFIED = range(3)
def __init__(self, item, inOrOut=ANIM_UNSPECIFIED):
super(DemoItemAnimation, self).__init__()
self.startPos = QtCore.QPointF()
self.opacityAt0 = 1.0
self.opacityAt1 = 1.0
self.startDelay = 0
self.inOrOut = inOrOut
self.hideOnFinished = False
self.forcePlay = False
self.timeline = QtCore.QTimeLine(5000)
self.timeline.setFrameRange(0, 2000)
self.timeline.setUpdateInterval(int(1000.0/Colors.fps))
self.moveOnPlay = False
self.setTimeLine(self.timeline)
self.setItem(item)
def prepare(self):
self.demoItem().prepare()
def setStartPos(self, pos):
self.startPos = pos
def setDuration(self, duration):
duration = int(duration * Colors.animSpeed)
self.timeline.setDuration(duration)
self.moveOnPlay = True
def setCurrentTime(self, ms):
self.timeline.setCurrentTime(ms)
def notOwnerOfItem(self):
return self is not self.demoItem().currentAnimation
def play(self, fromStart=True, force=False):
self.fromStart = fromStart
self.forcePlay = force
currPos = self.demoItem().pos()
# If the item that this animation controls in currently under the
# control of another animation, stop that animation first.
if self.demoItem().currentAnimation is not None:
self.demoItem().currentAnimation.timeline.stop()
self.demoItem().currentAnimation = self
self.timeline.stop()
if Colors.noAnimations and not self.forcePlay:
self.timeline.setCurrentTime(1)
self.demoItem().setPos(self.posAt(1))
else:
if self.demoItem().isVisible():
# If the item is already visible, start the animation from the
# items current position rather than from start..
self.setPosAt(0.0, currPos)
else:
self.setPosAt(0.0, self.startPos)
if self.fromStart:
self.timeline.setCurrentTime(0)
self.demoItem().setPos(self.posAt(0))
if self.inOrOut == DemoItemAnimation.ANIM_IN:
self.demoItem().setRecursiveVisible(True)
if self.startDelay:
QtCore.QTimer.singleShot(self.startDelay, self.playWithoutDelay)
return
else:
self.playWithoutDelay()
def playWithoutDelay(self):
if self.moveOnPlay and not (Colors.noAnimations and not self.forcePlay):
self.timeline.start()
self.demoItem().animationStarted(self.inOrOut)
def stop(self, reset):
self.timeline.stop()
if reset:
self.demoItem().setPos(self.posAt(0))
if self.hideOnFinished and not self.moveOnPlay:
self.demoItem().setRecursiveVisible(False)
self.demoItem().animationStopped(self.inOrOut)
def setRepeat(self, nr):
self.timeline.setLoopCount(nr)
def playReverse(self):
pass
def running(self):
return self.timeLine().state() == QtCore.QTimeLine.Running
def runningOrItemLocked(self):
return self.running() or self.demoItem().locked
def lockItem(self, state):
self.demoItem().locked = state
def demoItem(self):
return self.item()
def setOpacityAt0(self, opacity):
self.opacityAt0 = opacity
def setOpacityAt1(self, opacity):
self.opacityAt1 = opacity
def setOpacity(self, step):
demoItem = self.item()
demoItem.opacity = self.opacityAt0 + step * step * step * (self.opacityAt1 - self.opacityAt0)
def afterAnimationStep(self, step):
if step == 1.0:
if self.timeline.loopCount() > 0:
# Animation finished.
if self.hideOnFinished:
self.demoItem().setRecursiveVisible(False)
self.demoItem().animationStopped(self.inOrOut)
elif Colors.noAnimations and not self.forcePlay:
# The animation is not at end, but the animations should not play,
# so go to end.
self.setStep(1.0)
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