简单的带动画渐隐效果

//tmainwnd.h#ifndef TMAINWND_H#define TMAINWND_H#include <QWidget>#include <QPushButton>class TPushBtn2 : public QPushButton{    Q_OBJECTpublic:    explicit TPushBtn2(QWidget *parent = 0);    TPushBtn2(const QString  &,QWidget *parent = 0);    void UpdateAlpha();signals:public slots:protected:    void timerEvent(QTimerEvent *e);    void enterEvent(QEvent *);    void leaveEvent(QEvent *);    void changeMe();private:    int _alpha;    int _alphaTimer;    qint8 _nDirection;};class TMainWnd : public QWidget{    Q_OBJECTpublic:    explicit TMainWnd(QWidget *parent = 0);signals:public slots:};#endif // TMAINWND_H///tmainwnd.cpp#include <QVBoxLayout>#include <QTimerEvent> #include "tmainwnd.h"TMainWnd::TMainWnd(QWidget *parent) :    QWidget(parent){    QVBoxLayout *mainLO = new QVBoxLayout;    for(int i = 0 ; i < 10 ; i ++){        TPushBtn2 *btn  = new TPushBtn2(tr("Test %1").arg(i));        mainLO->addWidget(btn );    }    // style()->drawControl(.drawPushButton(this, paint);    setLayout(mainLO);}TPushBtn2::TPushBtn2(QWidget *parent) :    QPushButton(parent){}TPushBtn2::TPushBtn2(const QString &text, QWidget *parent)    :QPushButton(text,parent),_nDirection(1){}void TPushBtn2::timerEvent(QTimerEvent *e){    changeMe();}void TPushBtn2::enterEvent(QEvent *){    _alpha = 255;    _nDirection = 1;    changeMe();}void TPushBtn2::leaveEvent(QEvent *){    if(_alphaTimer) killTimer(_alphaTimer);    _nDirection = -1;    _alphaTimer = startTimer(100);}void TPushBtn2::changeMe(){    _alpha += 45 * _nDirection;    QPalette pal =this-> palette();    QColor cr  = pal.window().color();    if(_alpha >= 255){      if(_alphaTimer)  killTimer(_alphaTimer);        _alphaTimer = 0;        _alpha =  255 ;    }    else if( _alpha <= 0) {        killTimer(_alphaTimer);        _alphaTimer = 0;        _alpha =  0 ;    }    cr.setRed(_alpha);    cr.setBlue(_alpha);    pal.setColor(QPalette::All,QPalette::Button , cr);   this-> setPalette(pal);}////main.cpp#include <QApplication>#include "tmainwnd.h"int main(int argc, char **argv){    QApplication app(argc,argv);    TMainWnd window;    window.show();    window.resize(800,500);    return app.exec();}

 这只是一个粗糙的例子,我只用来测试目的....当然,想要做出真正高光渐隐的效果,例如 QQ 聊天窗口在上面那些工具按钮的高光渐隐效果,有QT 框架的支持 也不是很难的.....只要在 QStyle 里面做的手脚就可以实现了.....