任何人都可以提供或指向Qt中的一个简单示例，如果单击另一个按钮，我们可以向下或向上滑动按钮。例如，一个简单的对话框，其中有三个按钮垂直放置。当我们点击上面的按钮时，中间和下面的按钮应该向下滑动20-30像素，在上面和另外两个按钮之间留出一个空格。
此外，如果单击中间按钮，按钮应该达到其初始位置，并且在中间和最下面的按钮之间应该发生类似的动画。也就是说，下部按钮应向下滑动，在它与中间按钮之间留出空格。
我在Win7上使用qt 4.8.4和MinGW。
答案 0 :(得分：4)
以下是使用python编写动画按钮的示例：
#!/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_())