Qt状态机实例

#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();}