qmag-example.html

来自「QT 下载资料仅供参考」· HTML 代码 · 共 447 行 · 第 1/2 页

{
    r = index;
    <a href="qobject.html#killTimers">killTimers</a>();
    if (index &amp;&amp; !grabbing)
        <a href="qobject.html#startTimer">startTimer</a>( timer[r] );
}


void <a name="f471"></a>MagWidget::save()
{
<a name="x1638"></a>    if ( !p.<a href="qpixmap.html#isNull">isNull</a>() ) {
        <a href="qobject.html#killTimers">killTimers</a>();
<a name="x1628"></a>        <a href="qstring.html">QString</a> fn = QFileDialog::<a href="qfiledialog.html#getSaveFileName">getSaveFileName</a>();
<a name="x1645"></a>        if ( !fn.<a href="qstring.html#isEmpty">isEmpty</a>() )
<a name="x1639"></a>            p.<a href="qpixmap.html#save">save</a>( fn, "BMP" );
        if ( r )
            <a href="qobject.html#startTimer">startTimer</a>( timer[r] );
    }
}

void <a name="f472"></a>MagWidget::multiSave()
{
    if ( !p.<a href="qpixmap.html#isNull">isNull</a>() ) {
        multifn = ""; // stops saving
        multifn = QFileDialog::<a href="qfiledialog.html#getSaveFileName">getSaveFileName</a>();
        if ( multifn.<a href="qstring.html#isEmpty">isEmpty</a>() )
<a name="x1642"></a>            multiSaveButton-&gt;<a href="qpushbutton.html#setOn">setOn</a>(FALSE);
        if ( !r )
            p.<a href="qpixmap.html#save">save</a>( multifn, "BMP" );
    } else {
        multiSaveButton-&gt;<a href="qpushbutton.html#setOn">setOn</a>(FALSE);
    }
}


void <a name="f473"></a>MagWidget::grab()
{
    if ( !isVisible() )
        return;                 // don't eat resources when iconified

    if ( grabx &lt; 0 || graby &lt; 0 )
        return;                 // don't grab until the user has said to

    int x,y, w,h;

    w = (<a href="qwidget.html#width">width</a>()+z-1)/z;
    h = (<a href="qwidget.html#height">height</a>()+z-1-yoffset)/z;
    if ( w&lt;1 || h&lt;1 )
        return;                 // don't ask too much from the window system :)

    x = grabx-w/2;              // find a suitable position to grab from
    y = graby-h/2;
    if ( x + w &gt; QApplication::<a href="qapplication.html#desktop">desktop</a>()-&gt;width() )
        x = QApplication::<a href="qapplication.html#desktop">desktop</a>()-&gt;width()-w;
    else if ( x &lt; 0 )
        x = 0;
    if ( y + h &gt; QApplication::<a href="qapplication.html#desktop">desktop</a>()-&gt;height() )
        y = QApplication::<a href="qapplication.html#desktop">desktop</a>()-&gt;height()-h;
    else if ( y &lt; 0 )
        y = 0;

<a name="x1637"></a>    p = QPixmap::<a href="qpixmap.html#grabWindow">grabWindow</a>( QApplication::<a href="qapplication.html#desktop">desktop</a>()-&gt;winId(),  x, y, w, h );
<a name="x1636"></a>    image = p.<a href="qpixmap.html#convertToImage">convertToImage</a>();
    <a href="qwmatrix.html">QWMatrix</a> m;                 // after getting it, scale it
<a name="x1662"></a>    m.<a href="qwmatrix.html#scale">scale</a>( (double)z, (double)z );
<a name="x1640"></a>    pm = p.<a href="qpixmap.html#xForm">xForm</a>( m );

<a name="x1623"></a>    if ( !multiSaveButton || !multiSaveButton-&gt;<a href="qbutton.html#isOn">isOn</a>() )
        <a href="qwidget.html#repaint">repaint</a>( FALSE );               // and finally repaint, flicker-free
}


<a name="x1656"></a>void MagWidget::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a> * )
{
    if ( !pm.<a href="qpixmap.html#isNull">isNull</a>() ) {
        <a href="qpainter.html">QPainter</a> paint( this );
        paint.<a href="qpainter.html#drawPixmap">drawPixmap</a>( 0, zoom ? zoom-&gt;<a href="qwidget.html#height">height</a>()+4 : 0, pm,
                              0,0, width(), height()-yoffset );
    }
}


<a name="x1654"></a>void MagWidget::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *e )
{
    if ( !grabbing ) {          // prepare to grab...
        grabbing = TRUE;
        <a href="qobject.html#killTimers">killTimers</a>();
        <a href="qwidget.html#grabMouse">grabMouse</a>( crossCursor );
        grabx = -1;
        graby = -1;
    } else {                    // REALLY prepare to grab
<a name="x1633"></a>        grabx = <a href="qwidget.html#mapToGlobal">mapToGlobal</a>(e-&gt;<a href="qmouseevent.html#pos">pos</a>()).x();
        graby = <a href="qwidget.html#mapToGlobal">mapToGlobal</a>(e-&gt;<a href="qmouseevent.html#pos">pos</a>()).y();
    }
}



<a name="x1655"></a>void MagWidget::<a href="qwidget.html#mouseReleaseEvent">mouseReleaseEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> * e )
{
    if ( grabbing &amp;&amp; grabx &gt;= 0 &amp;&amp; graby &gt;= 0 ) {
        grabbing = FALSE;
        grabAround(e-&gt;<a href="qmouseevent.html#pos">pos</a>());
        <a href="qwidget.html#releaseMouse">releaseMouse</a>();
    }
}

void <a name="f474"></a>MagWidget::grabAround(QPoint pos)
{
    int rx, ry;
    rx = <a href="qwidget.html#mapToGlobal">mapToGlobal</a>(pos).x();
    ry = <a href="qwidget.html#mapToGlobal">mapToGlobal</a>(pos).y();
    int w = QABS(rx-grabx);
    int h = QABS(ry-graby);
    if ( w &gt; 10 &amp;&amp; h &gt; 10 ) {
        int pz;
        pz = 1;
        while ( w*pz*h*pz &lt; width()*(<a href="qwidget.html#height">height</a>()-yoffset) &amp;&amp;
                w*pz &lt; QApplication::<a href="qapplication.html#desktop">desktop</a>()-&gt;width() &amp;&amp;
                h*pz &lt; QApplication::<a href="qapplication.html#desktop">desktop</a>()-&gt;height() )
            pz++;
        if ( (w*pz*h*pz - width()*(<a href="qwidget.html#height">height</a>()-yoffset)) &gt;
             (<a href="qwidget.html#width">width</a>()*(<a href="qwidget.html#height">height</a>()-yoffset) - w*(pz-1)*h*(pz-1)) )
            pz--;
        if ( pz &lt; 1 )
            pz = 1;
        if ( pz &gt; 8 )
            pz = 8;
        if ( zoom )
<a name="x1627"></a>            zoom-&gt;<a href="qcombobox.html#setCurrentItem">setCurrentItem</a>( pz-1 );

        z = pz;
        grabx = QMIN(rx, grabx) + w/2;
        graby = QMIN(ry, graby) + h/2;
        <a href="qwidget.html#resize">resize</a>( w*z, h*z+yoffset );
    }
    grab();
    if ( r )
        <a href="qobject.html#startTimer">startTimer</a>( timer[r] );
}


<a name="x1653"></a>void MagWidget::<a href="qwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *e )
{
    if ( grabbing || pm.<a href="qpixmap.html#isNull">isNull</a>() ||
         e-&gt;<a href="qmouseevent.html#pos">pos</a>().y() &gt; height() - (zoom ? zoom-&gt;<a href="qwidget.html#fontMetrics">fontMetrics</a>().height() - 4 : 0) ||
         e-&gt;<a href="qmouseevent.html#pos">pos</a>().y() &lt; (zoom ? zoom-&gt;<a href="qwidget.html#height">height</a>()+4 : 4) ) {
        rgb-&gt;<a href="qlabel.html#setText">setText</a>( "" );
    } else {
        int x,y;
        x = e-&gt;<a href="qmouseevent.html#pos">pos</a>().x() / z;
        y = (e-&gt;<a href="qmouseevent.html#pos">pos</a>().y() - ( zoom ? zoom-&gt;<a href="qwidget.html#height">height</a>() : 0 ) - 4) / z;
        <a href="qstring.html">QString</a> pixelinfo;
<a name="x1630"></a>        if ( image.<a href="qimage.html#valid">valid</a>(x,y) )
        {
<a name="x1629"></a>            QRgb px = image.<a href="qimage.html#pixel">pixel</a>(x,y);
<a name="x1648"></a>            pixelinfo.<a href="qstring.html#sprintf">sprintf</a>(" %3d,%3d,%3d  #%02x%02x%02x",
                <a href="qcolor.html#qRed">qRed</a>(px), qGreen(px), qBlue(px),
                <a href="qcolor.html#qRed">qRed</a>(px), qGreen(px), qBlue(px));
        }
        <a href="qstring.html">QString</a> label;
        label.<a href="qstring.html#sprintf">sprintf</a>( "x=%d, y=%d %s",
            x+grabx, y+graby, (const char*)pixelinfo );
        rgb-&gt;<a href="qlabel.html#setText">setText</a>( label );
    }
}


<a name="x1649"></a>void MagWidget::<a href="qwidget.html#focusOutEvent">focusOutEvent</a>( <a href="qfocusevent.html">QFocusEvent</a> * )
{
    rgb-&gt;<a href="qlabel.html#setText">setText</a>( "" );
}


<a name="x1634"></a>void MagWidget::<a href="qobject.html#timerEvent">timerEvent</a>( <a href="qtimerevent.html">QTimerEvent</a> * )
{
    grab();
/*
    if ( multiSaveButton-&gt;<a href="qbutton.html#isOn">isOn</a>() &amp;&amp; !multifn.<a href="qstring.html#isEmpty">isEmpty</a>() ) {
        <a href="qregexp.html">QRegExp</a> num("[0-9][0-9]*");
        int start;
        int len;
<a name="x1644"></a>        if ((start=num.<a href="qregexp.html#match">match</a>(multifn,0,&amp;len))&gt;=0)
<a name="x1647"></a>            multifn.<a href="qstring.html#replace">replace</a>(num,
<a name="x1646"></a>                QString().setNum(multifn.<a href="qstring.html#mid">mid</a>(start,len).toInt()+1)
            );
        p.<a href="qpixmap.html#save">save</a>( multifn, "BMP" );
    }
*/
}


<a name="x1659"></a>void MagWidget::<a href="qwidget.html#resizeEvent">resizeEvent</a>( <a href="qresizeevent.html">QResizeEvent</a> * )
{
    rgb-&gt;<a href="qwidget.html#setGeometry">setGeometry</a>( 0, height() - rgb-&gt;<a href="qwidget.html#height">height</a>(), width(), rgb-&gt;<a href="qwidget.html#height">height</a>() );
    grab();
}


#include "qmag.moc"


int main( int argc, char **argv )
{
    <a href="qapplication.html">QApplication</a> a( argc, argv );
    MagWidget m;
    a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &amp;m );
    m.<a href="qwidget.html#show">show</a>();
    return a.<a href="qapplication.html#exec">exec</a>();
}
</pre>

<p>See also <a href="examples.html">Examples</a>.

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