[Qt-interest] Sleep

[Parameshwari]

Thanks Tim,But where can i get "#include <boost/function.hpp>" ,
"boost" location. Is that to be added a separate module? I am getting
"error" in that.

Regards


  -----Original Message-----
  From: Tim W [mailto:timpie.w at gmail.com]
  Sent: Tuesday, April 07, 2009 7:59 PM
  To: paramr at tataelxsi.co.in
  Cc: qt-interest at trolltech.com
  Subject: Re: [Qt-interest] Sleep




  On Tue, Apr 7, 2009 at 8:46 AM, Parameshwari <paramr at tataelxsi.co.in>
wrote:


    but i wanted to add a sleep before resize option, So that i will get the
slider effect.some one could help in this.





  Try not to suspend the gui thread.
  I think you need something like this ...


    //header
    #include <QObject>
    #include <QSize>
    #include <boost/function.hpp>

    class QTimeLine;

    class ResizeAnimation : public QObject
    {
        Q_OBJECT
    public:
        typedef boost::function< void (int, int) > Resize;

        explicit ResizeAnimation( QObject* const aParent );
        void setResizeObject( const Resize& aResizableObject, const QSize&
aEndSize );

        public slots:
            void start();

            private slots:
                void nextFrame(int aFrame );

    private:
        QTimeLine *const m_timeLine;
        QSize m_size;
        Resize m_resizable;
    };

    //cpp
    #include "resizeanimation.h"
    #include <QTimeLine>

    ResizeAnimation::ResizeAnimation( QObject* const aParent )
    : QObject(aParent),
      m_timeLine( new QTimeLine( 2000, this ) ),
      m_size(),
      m_resizable()
    {
        connect( m_timeLine, SIGNAL( frameChanged( int ) ),
SLOT(nextFrame(int)) );
        m_timeLine->setLoopCount( 5 );
    }


    void ResizeAnimation::setResizeObject( const Resize& aResizableObject,
const QSize& aEndSize )
    {
        m_resizable =aResizableObject;
        m_size = aEndSize;
        m_timeLine->setFrameRange(0, qMax( aEndSize.width(),
aEndSize.height() ) );
    }

    void ResizeAnimation::start()
    {
        m_timeLine->start();
    }

    void ResizeAnimation::nextFrame(int aFrame )
    {
        if(!m_resizable)
        {
            m_resizable(qMin( aFrame, m_size.width() ), qMin( aFrame,
m_size.height() ));
        }
    }

    //user code


    #include <QtGui/QApplication>
    #include <QtGui/QWidget>
    #include <boost/lambda/bind.hpp>
    #include <boost/ref.hpp>

    using namespace boost::lambda;
    using namespace boost;


    int main(int argc, char *argv[])
    {
        QApplication a(argc, argv);
        QWidget widgetToResize;
        widgetToResize.resize( 0, 0 );
        widgetToResize.show();

        ResizeAnimation animation(0);
        void (QWidget::*resize)( int, int ) = &QWidget::resize;
        animation.setResizeObject( bind(resize, &widgetToResize, _1, _2),
QSize( 500,500 ));
        animation.start();
        return a.exec();
    }



  Cheers,
  Tim





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