简单的带动画渐隐效果的 TPushButton....

Aisy_D 2010-09-23 09:26:12

   

 

///tmainwnd.h



#ifndef TMAINWND_H

#define TMAINWND_H





#include <QWidget>

#include <QPushButton>



class TPushBtn2 : public QPushButton

{

    Q_OBJECT

public:

    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_OBJECT

public:

    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();

}