progress-example.html

来自「QT 下载资料仅供参考」· HTML 代码 · 共 388 行 · 第 1/2 页

        options = new <a href="qpopupmenu.html">QPopupMenu</a>();
        <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( options );
        menubar-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;Options", options );
        td_id = options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Timer driven", this, SLOT(timerDriven()) );
        ld_id = options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Loop driven", this, SLOT(loopDriven()) );
        options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
        dl_id = options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Default label", this, SLOT(defaultLabel()) );
        cl_id = options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Custom label", this, SLOT(customLabel()) );
        options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
        md_id = options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "No minimum duration", this, SLOT(toggleMinimumDuration()) );
<a name="x49"></a>        options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
        loopDriven();
        defaultLabel();

        setFixedSize( 400, 300 );

        setBackgroundColor( black );
    }

public slots:
    void doMenuItem(int id)
    {
        if (id &gt;= first_draw_item &amp;&amp; id &lt;= last_draw_item)
            draw(drawItemRects(id));
    }

    void stopDrawing() { got_stop = TRUE; }

    void timerDriven()
    {
        timer_driven = TRUE;
<a name="x39"></a>        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( td_id, TRUE );
        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( ld_id, FALSE );
    }

    void loopDriven()
    {
        timer_driven = FALSE;
        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( ld_id, TRUE );
        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( td_id, FALSE );
    }

    void defaultLabel()
    {
        default_label = TRUE;
        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( dl_id, TRUE );
        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( cl_id, FALSE );
    }

    void customLabel()
    {
        default_label = FALSE;
        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( dl_id, FALSE );
        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( cl_id, TRUE );
    }

    void toggleMinimumDuration()
    {
        options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( md_id,
<a name="x38"></a>           !options-&gt;<a href="qmenudata.html#isItemChecked">isItemChecked</a>( md_id ) );
    }

private:
    void timerEvent( <a href="qtimerevent.html">QTimerEvent</a>* )
    {
<a name="x54"></a><a name="x53"></a>        pb-&gt;<a href="qprogressdialog.html#setProgress">setProgress</a>( pb-&gt;<a href="qprogressdialog.html#totalSteps">totalSteps</a>() - rects );
        rects--;

        {
            <a href="qpainter.html">QPainter</a> p(this);

            int ww = width();
            int wh = height();

            if ( ww &gt; 8 &amp;&amp; wh &gt; 8 ) {
                <a href="qcolor.html">QColor</a> c(rand()%255, rand()%255, rand()%255);
                int x = rand() % (ww-8);
                int y = rand() % (wh-8);
                int w = rand() % (ww-x);
                int h = rand() % (wh-y);
<a name="x43"></a>                p.<a href="qpainter.html#fillRect">fillRect</a>( x, y, w, h, c );
            }
        }

        if (!rects || got_stop) {
            pb-&gt;<a href="qprogressdialog.html#setProgress">setProgress</a>( pb-&gt;<a href="qprogressdialog.html#totalSteps">totalSteps</a>() );
            <a href="qpainter.html">QPainter</a> p(this);
            p.<a href="qpainter.html#fillRect">fillRect</a>(0, 0, width(), height(), backgroundColor());
            enableDrawingItems(TRUE);
            killTimers();
            delete pb;
            pb = 0;
        }
    }

    <a href="qprogressdialog.html">QProgressDialog</a>* newProgressDialog( const char* label, int steps, bool modal )
    {
        <a href="qprogressdialog.html">QProgressDialog</a> *d = new <a href="qprogressdialog.html">QProgressDialog</a>(label, "Cancel", steps, this,
                                                 "progress", modal);
        if ( options-&gt;<a href="qmenudata.html#isItemChecked">isItemChecked</a>( md_id ) )
<a name="x52"></a>            d-&gt;<a href="qprogressdialog.html#setMinimumDuration">setMinimumDuration</a>(0);
        if ( !default_label )
<a name="x51"></a>            d-&gt;<a href="qprogressdialog.html#setLabel">setLabel</a>( new AnimatedThingy(d,label) );
        return d;
    }

    void enableDrawingItems(bool yes)
    {
        for (int i=first_draw_item; i&lt;=last_draw_item; i++) {
<a name="x40"></a>            menubar-&gt;<a href="qmenudata.html#setItemEnabled">setItemEnabled</a>(i, yes);
        }
    }

    void draw(int n)
    {
        if ( timer_driven ) {
            if ( pb ) {
                <a href="qapplication.html#qWarning">qWarning</a>("This cannot happen!");
                return;
            }
            rects = n;
            pb = newProgressDialog("Drawing rectangles.\n"
                                   "Using timer event.", n, FALSE);
            pb-&gt;<a href="qwidget.html#setCaption">setCaption</a>("Please Wait");
<a name="x50"></a>            connect(pb, SIGNAL(<a href="qprogressdialog.html#cancelled">cancelled</a>()), this, SLOT(stopDrawing()));
            enableDrawingItems(FALSE);
            startTimer(0);
            got_stop = FALSE;
        } else {
            <a href="qprogressdialog.html">QProgressDialog</a>* lpb = newProgressDialog(
                        "Drawing rectangles.\nUsing loop.", n, TRUE);
            lpb-&gt;<a href="qwidget.html#setCaption">setCaption</a>("Please Wait");

            <a href="qpainter.html">QPainter</a> p(this);
            for (int i=0; i&lt;n; i++) {
                lpb-&gt;<a href="qprogressdialog.html#setProgress">setProgress</a>(i);
<a name="x55"></a>                if ( lpb-&gt;<a href="qprogressdialog.html#wasCancelled">wasCancelled</a>() )
                    break;

                <a href="qcolor.html">QColor</a> c(rand()%255, rand()%255, rand()%255);
                int x = rand()%(width()-8);
                int y = rand()%(height()-8);
                int w = rand()%(width()-x);
                int h = rand()%(height()-y);
                p.<a href="qpainter.html#fillRect">fillRect</a>(x,y,w,h,c);
            }

            p.<a href="qpainter.html#fillRect">fillRect</a>(0, 0, width(), height(), backgroundColor());

            delete lpb;
        }
    }

    <a href="qmenubar.html">QMenuBar</a>* menubar;
    <a href="qprogressdialog.html">QProgressDialog</a>* pb;
    <a href="qpopupmenu.html">QPopupMenu</a>* options;
    int td_id, ld_id;
    int dl_id, cl_id;
    int md_id;
    int rects;
    bool timer_driven;
    bool default_label;
    bool got_stop;
};

int main( int argc, char **argv )
{
    <a href="qapplication.html">QApplication</a> a( argc, argv );

    int wincount = argc &gt; 1 ? atoi(argv[1]) : 1;

    for ( int i=0; i&lt;wincount; i++ ) {
        CPUWaster* cpuw = new CPUWaster;
        if ( i == 0 ) a.<a href="qapplication.html#setMainWidget">setMainWidget</a>(cpuw);
        cpuw-&gt;<a href="qwidget.html#show">show</a>();
    }
    return a.<a href="qapplication.html#exec">exec</a>();
}

#include "progress.moc"
</pre>

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

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