Qt状态机实例

    Qt4.6引入了动画框架,摆脱了以往控件只能安静的呆在布局里的时代,利用Qt提供的动画框架,我们可以让控件跳起舞来,呵呵,很有趣啊… 在Qt4.7中又引入了Qt quick技术,其中的QML语言也是专门来定制GUI动画效果的,这是一种新的GUI动画机制,我刚也接触了些,语法类似CSS,实现预定义的动画很方便,所见即所得,路还得一步步走,先学习一下传统的Qt动画方式——状态机

这里先直接给出例子(见图):


下面是源码:

#include <QApplication>
#include
<QStateMachine>
#include
<QPushButton>
#include
<QSignalTransition>
#include
<QPropertyAnimation>

int main(int argc,char **argv)
{
QApplication app(argc,argv);
QWidget
*w=new QWidget;
w
->resize(240,320);
QPushButton
*button = new QPushButton("hicjiajia",w);
QStateMachine
*machine = new QStateMachine; //新建状态机
QState *state1 = new QState(machine); //状态1
state1->assignProperty(button,"geometry",QRect(0,0,80,30)); //绑定button的geomertry属性
machine->setInitialState(state1); //state1设为初始化状态
QState *state2 = new QState(machine);
state2
->assignProperty(button,"geometry",QRect(w->width()-30,w->height()-80,30,80));
QFont font
= QFont("Airl", 12);
state2
->assignProperty(button,"font",font); //状态2字体


QPropertyAnimation
*ani=new QPropertyAnimation(button,"geometry");
ani
->setDuration(2000);
ani
->setEasingCurve(QEasingCurve::OutBounce); //动画效果—弹跳

QSignalTransition
*transition1=state1->addTransition(button,SIGNAL(clicked()),state2); //动画触发信号
transition1->addAnimation(ani);
QSignalTransition
*transition2=state2->addTransition(button,SIGNAL(clicked()),state1);
transition2
->addAnimation(ani);
machine
->start(); //开启状态机

w
->show();
return app.exec();
}


posted on 2011-01-19 17:45  hicjiajia  阅读(6486)  评论(0编辑  收藏  举报