任何人都可以提供，或指向Qt中一个简单的例子，在这里我们可以向下或向上如果点击另一个按钮滑动按钮。 例如，一个简单的对话框具有三个按钮竖直地定位。 当我们单击上方的按钮上，中，下部按钮应滑落到20-30像素离开上和其他两个按键之间的空间。
此外，如果被点击中间按钮，按钮应达到其初始位置和类似的动画应的中间和最下方的按钮之间发生。 也就是说，下按钮应滑落到离开它与中间的按键之间的空间。
我使用使用MinGW Win7上QT 4.8.4。
Answer 1:
这里是一个用蟒动画按钮的一个示例：
#!/usr/bin/env python
#-*- coding:utf-8 -*-
from PyQt4 import QtCore, QtGui
class StateSwitchEvent(QtCore.QEvent):
StateSwitchType = QtCore.QEvent.User + 256
def __init__(self, rand=0):
super(StateSwitchEvent, self).__init__(StateSwitchEvent.StateSwitchType)
self.m_rand = rand
def rand(self):
return self.m_rand
class StateSwitchTransition(QtCore.QAbstractTransition):
def __init__(self, rand):
super(StateSwitchTransition, self).__init__()
self.m_rand = rand
def eventTest(self, event):
return (event.type() == StateSwitchEvent.StateSwitchType and
event.rand() == self.m_rand)
def onTransition(self, event):
pass
class StateSwitcher(QtCore.QState):
def __init__(self, machine):
super(StateSwitcher, self).__init__(machine)
self.m_stateCount = 0
self.m_lastIndex = 1
def onEntry(self, event):
self.m_lastIndex = 1 if self.m_lastIndex >= self.m_stateCount else self.m_lastIndex + 1
self.machine().postEvent(StateSwitchEvent(self.m_lastIndex))
def addState(self, state, animation):
self.m_stateCount += 1
trans = StateSwitchTransition(self.m_stateCount)
trans.setTargetState(state)
trans.addAnimation(animation)
self.addTransition(trans)
def createGeometryState(w1, rect1, w2, rect2, w3, rect3, w4, rect4, w5, rect5, w6, rect6, parent):
result = QtCore.QState(parent)
result.assignProperty(w1, 'geometry', rect1)
result.assignProperty(w1, 'geometry', rect1)
result.assignProperty(w2, 'geometry', rect2)
result.assignProperty(w3, 'geometry', rect3)
result.assignProperty(w4, 'geometry', rect4)
result.assignProperty(w5, 'geometry', rect5)
result.assignProperty(w6, 'geometry', rect6)
return result
@QtCore.pyqtSlot()
def on_pushButtonStart_clicked():
lastItem = None
lowestY = None
for item in scene.items():
itemY = item.pos().y()
if lastItem == None or itemY <= lowestY:
lowestY = itemY
lastItem = item
for item in scene.items():
if item != lastItem:
lastItem.stackBefore(item)
timer.start()
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
button1 = QtGui.QPushButton()
button1.setFixedSize(QtCore.QSize(50, 50))
button1.setText("#1")
button2 = QtGui.QPushButton()
button2.setFixedSize(QtCore.QSize(50, 50))
button2.setText("#2")
button3 = QtGui.QPushButton()
button3.setFixedSize(QtCore.QSize(50, 50))
button3.setText("#3")
button4 = QtGui.QPushButton()
button4.setFixedSize(QtCore.QSize(50, 50))
button4.setText("#4")
button5 = QtGui.QPushButton()
button5.setFixedSize(QtCore.QSize(50, 50))
button5.setText("#5")
button6 = QtGui.QPushButton()
button6.setFixedSize(QtCore.QSize(50, 50))
button6.setText("#6")
scene = QtGui.QGraphicsScene(0, 0, 50, 300)
scene.addWidget(button1)
scene.addWidget(button2)
scene.addWidget(button3)
scene.addWidget(button4)
scene.addWidget(button5)
scene.addWidget(button6)
timer = QtCore.QTimer()
timer.setInterval(0)
timer.setSingleShot(True)
group = QtCore.QState()
state1 = createGeometryState(
button1, QtCore.QRect(0, 0, 50, 50),
button2, QtCore.QRect(0, 50, 50, 50),
button3, QtCore.QRect(0, 100, 50, 50),
button4, QtCore.QRect(0, 150, 50, 50),
button5, QtCore.QRect(0, 200, 50, 50),
button6, QtCore.QRect(0, 250, 50, 50),
group
)
state2 = createGeometryState(
button2, QtCore.QRect(0, 0, 50, 50),
button3, QtCore.QRect(0, 50, 50, 50),
button4, QtCore.QRect(0, 100, 50, 50),
button5, QtCore.QRect(0, 150, 50, 50),
button6, QtCore.QRect(0, 200, 50, 50),
button1, QtCore.QRect(0, 250, 50, 50),
group
)
state3 = createGeometryState(
button3, QtCore.QRect(0, 0, 50, 50),
button4, QtCore.QRect(0, 50, 50, 50),
button5, QtCore.QRect(0, 100, 50, 50),
button6, QtCore.QRect(0, 150, 50, 50),
button1, QtCore.QRect(0, 200, 50, 50),
button2, QtCore.QRect(0, 250, 50, 50),
group
)
state4 = createGeometryState(
button4, QtCore.QRect(0, 0, 50, 50),
button5, QtCore.QRect(0, 50, 50, 50),
button6, QtCore.QRect(0, 100, 50, 50),
button1, QtCore.QRect(0, 150, 50, 50),
button2, QtCore.QRect(0, 200, 50, 50),
button3, QtCore.QRect(0, 250, 50, 50),
group
)
state5 = createGeometryState(
button5, QtCore.QRect(0, 0, 50, 50),
button6, QtCore.QRect(0, 50, 50, 50),
button1, QtCore.QRect(0, 100, 50, 50),
button2, QtCore.QRect(0, 150, 50, 50),
button3, QtCore.QRect(0, 200, 50, 50),
button4, QtCore.QRect(0, 250, 50, 50),
group
)
state6 = createGeometryState(
button6, QtCore.QRect(0, 0, 50, 50),
button1, QtCore.QRect(0, 50, 50, 50),
button2, QtCore.QRect(0, 100, 50, 50),
button3, QtCore.QRect(0, 150, 50, 50),
button4, QtCore.QRect(0, 200, 50, 50),
button5, QtCore.QRect(0, 250, 50, 50),
group
)
animationGroup = QtCore.QParallelAnimationGroup()
anim = QtCore.QPropertyAnimation(button6, 'geometry')
anim.setDuration(1111)
anim.setEasingCurve(QtCore.QEasingCurve.OutElastic)
animationGroup.addAnimation(anim)
anim = QtCore.QPropertyAnimation(button5, 'geometry')
anim.setDuration(1111)
anim.setEasingCurve(QtCore.QEasingCurve.OutElastic)
animationGroup.addAnimation(anim)
anim = QtCore.QPropertyAnimation(button4, 'geometry')
anim.setDuration(1111)
anim.setEasingCurve(QtCore.QEasingCurve.OutElastic)
animationGroup.addAnimation(anim)
anim = QtCore.QPropertyAnimation(button3, 'geometry')
anim.setDuration(1111)
anim.setEasingCurve(QtCore.QEasingCurve.OutElastic)
animationGroup.addAnimation(anim)
anim = QtCore.QPropertyAnimation(button2, 'geometry')
anim.setDuration(1111)
anim.setEasingCurve(QtCore.QEasingCurve.OutElastic)
animationGroup.addAnimation(anim)
anim = QtCore.QPropertyAnimation(button1, 'geometry')
anim.setDuration(1111)
anim.setEasingCurve(QtCore.QEasingCurve.OutElastic)
animationGroup.addAnimation(anim)
machine = QtCore.QStateMachine()
stateSwitcher = StateSwitcher(machine)
stateSwitcher.addState(state1, animationGroup)
stateSwitcher.addState(state2, animationGroup)
stateSwitcher.addState(state3, animationGroup)
stateSwitcher.addState(state4, animationGroup)
stateSwitcher.addState(state5, animationGroup)
stateSwitcher.addState(state6, animationGroup)
group.addTransition(timer.timeout, stateSwitcher)
group.setInitialState(state1)
machine.addState(group)
machine.setInitialState(group)
machine.start()
view = QtGui.QGraphicsView(scene)
view.setAlignment(QtCore.Qt.AlignLeft | QtCore.Qt.AlignTop)
view.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
view.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
view.setFixedSize(50, 150)
window = QtGui.QWidget()
pushButtonStart = QtGui.QPushButton(window)
pushButtonStart.setText("Start")
pushButtonStart.clicked.connect(on_pushButtonStart_clicked)
layoutVertical = QtGui.QVBoxLayout(window)
layoutVertical.addWidget(view)
layoutVertical.addWidget(pushButtonStart)
window.show()
window.resize(333, 150)
sys.exit(app.exec_())
文章来源: Qt animating a button
