scrollview-example.html

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        <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( file );
<a name="x721"></a>        menubar-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;File", file );
        file-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Quit", qApp,  SLOT(<a href="qapplication.html#quit">quit</a>()) );

        vp_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
        <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( vp_options );
<a name="x731"></a>        vp_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
        menubar-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "&amp;ScrollView", vp_options );
<a name="x729"></a>        connect( vp_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
            this, SLOT(doVPMenuItem(int)) );

        vauto_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Vertical Auto" );
        vaoff_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Vertical AlwaysOff" );
        vaon_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Vertical AlwaysOn" );
<a name="x722"></a>        vp_options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
        hauto_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Horizontal Auto" );
        haoff_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Horizontal AlwaysOff" );
        haon_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Horizontal AlwaysOn" );
        vp_options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
        corn_id = vp_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "cornerWidget" );

        if (technique == 1) {
            vp = new <a href="qscrollview.html">QScrollView</a>(this);
<a name="x742"></a>            BigShrinker *bs = new BigShrinker(0);//(vp-&gt;<a href="qscrollview.html#viewport">viewport</a>());
<a name="x732"></a>            vp-&gt;<a href="qscrollview.html#addChild">addChild</a>(bs);
<a name="x746"></a>            bs-&gt;<a href="qwidget.html#setAcceptDrops">setAcceptDrops</a>(TRUE);
            QObject::<a href="qobject.html#connect">connect</a>(bs, SIGNAL(clicked(int,int)),
<a name="x733"></a>                            vp, SLOT(<a href="qscrollview.html#center">center</a>(int,int)));
        } else {
            vp = new BigMatrix(this);
            if ( technique == 3 )
<a name="x735"></a>                vp-&gt;<a href="qscrollview.html#enableClipper">enableClipper</a>(TRUE);
            srand(1);
            for (int i=0; i&lt;30; i++) {
                <a href="qmultilineedit.html">QMultiLineEdit</a> *l = new <a href="qmultilineedit.html">QMultiLineEdit</a>(vp-&gt;<a href="qscrollview.html#viewport">viewport</a>(),"First");
                l-&gt;<a href="qtextedit.html#setText">setText</a>("Drag out more of these.");
                l-&gt;<a href="qwidget.html#resize">resize</a>(100,100);
                vp-&gt;<a href="qscrollview.html#addChild">addChild</a>(l, rand()%800, rand()%10000);
            }
            vp-&gt;<a href="qscrollview.html#viewport">viewport</a>()-&gt;setBackgroundMode(NoBackground);
        }

        f_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
        <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( f_options );
        f_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
        menubar-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "F&amp;rame", f_options );
        connect( f_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
            this, SLOT(doFMenuItem(int)) );

        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "No Frame", style_id );
        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Box", style_id|QFrame::Box );
        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Panel", style_id|QFrame::Panel );
        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "WinPanel", style_id|QFrame::WinPanel );
        f_options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Plain", style_id|QFrame::Plain );
        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Raised", style_id|QFrame::Raised );
<a name="x720"></a>        f_laststyle = f_options-&gt;<a href="qmenudata.html#indexOf">indexOf</a>(
            f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Sunken", style_id|QFrame::Sunken ));
        f_options-&gt;<a href="qmenudata.html#insertSeparator">insertSeparator</a>();
        lw_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
        <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( lw_options );
        lw_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
        for (int lw = 1; lw &lt;= max_lw; lw++) {
            <a href="qstring.html">QString</a> str;
            str.<a href="qstring.html#sprintf">sprintf</a>("%d Pixels", lw);
            lw_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( str, lw_id | lw );
        }
        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Line Width", lw_options );
        connect( lw_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
            this, SLOT(doFMenuItem(int)) );
        mlw_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
        <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( mlw_options );
        mlw_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
        for (int mlw = 0; mlw &lt;= max_mlw; mlw++) {
            <a href="qstring.html">QString</a> str;
            str.<a href="qstring.html#sprintf">sprintf</a>("%d Pixels", mlw);
            mlw_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( str, mlw_id | mlw );
        }
        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Midline Width", mlw_options );
        connect( mlw_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
            this, SLOT(doFMenuItem(int)) );
        mw_options = new <a href="qpopupmenu.html">QPopupMenu</a>( menubar );
        <a href="qapplication.html#Q_CHECK_PTR">Q_CHECK_PTR</a>( mw_options );
        mw_options-&gt;<a href="qpopupmenu.html#setCheckable">setCheckable</a>( TRUE );
        for (int mw = 0; mw &lt;= max_mw; mw++) {
            <a href="qstring.html">QString</a> str;
            str.<a href="qstring.html#sprintf">sprintf</a>("%d Pixels", mw);
            mw_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( str, mw_id | mw );
        }
        f_options-&gt;<a href="qmenudata.html#insertItem">insertItem</a>( "Margin Width", mw_options );
        connect( mw_options, SIGNAL(<a href="qpopupmenu.html#activated">activated</a>(int)),
            this, SLOT(doFMenuItem(int)) );

        setVPMenuItems();
        setFMenuItems();

        <a href="qvboxlayout.html">QVBoxLayout</a>* vbox = new <a href="qvboxlayout.html">QVBoxLayout</a>(this);
<a name="x718"></a>        vbox-&gt;<a href="qlayout.html#setMenuBar">setMenuBar</a>(menubar);
<a name="x719"></a>        menubar-&gt;<a href="qmenubar.html#setSeparator">setSeparator</a>(QMenuBar::InWindowsStyle);
        vbox-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>(vp);
<a name="x717"></a>        vbox-&gt;<a href="qlayout.html#activate">activate</a>();

        corner = new <a href="qsizegrip.html">QSizeGrip</a>(this);
<a name="x745"></a>        corner-&gt;<a href="qwidget.html#hide">hide</a>();
    }

private slots:
    void doVPMenuItem(int id)
    {
        if (id == vauto_id ) {
<a name="x740"></a>            vp-&gt;<a href="qscrollview.html#setVScrollBarMode">setVScrollBarMode</a>(QScrollView::Auto);
        } else if (id == vaoff_id) {
            vp-&gt;<a href="qscrollview.html#setVScrollBarMode">setVScrollBarMode</a>(QScrollView::AlwaysOff);
        } else if (id == vaon_id) {
            vp-&gt;<a href="qscrollview.html#setVScrollBarMode">setVScrollBarMode</a>(QScrollView::AlwaysOn);
        } else if (id == hauto_id) {
<a name="x739"></a>            vp-&gt;<a href="qscrollview.html#setHScrollBarMode">setHScrollBarMode</a>(QScrollView::Auto);
        } else if (id == haoff_id) {
            vp-&gt;<a href="qscrollview.html#setHScrollBarMode">setHScrollBarMode</a>(QScrollView::AlwaysOff);
        } else if (id == haon_id) {
            vp-&gt;<a href="qscrollview.html#setHScrollBarMode">setHScrollBarMode</a>(QScrollView::AlwaysOn);
        } else if (id == corn_id) {
<a name="x734"></a>            bool corn = !vp-&gt;<a href="qscrollview.html#cornerWidget">cornerWidget</a>();
<a name="x738"></a>            vp-&gt;<a href="qscrollview.html#setCornerWidget">setCornerWidget</a>(corn ? corner : 0);
        } else {
            return; // Not for us to process.
        }
        setVPMenuItems();
    }

    void setVPMenuItems()
    {
<a name="x741"></a>        QScrollView::ScrollBarMode vm = vp-&gt;<a href="qscrollview.html#vScrollBarMode">vScrollBarMode</a>();
<a name="x723"></a>        vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( vauto_id, vm == QScrollView::Auto );
        vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( vaoff_id, vm == QScrollView::AlwaysOff );
        vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( vaon_id, vm == QScrollView::AlwaysOn );

<a name="x736"></a>        QScrollView::ScrollBarMode hm = vp-&gt;<a href="qscrollview.html#hScrollBarMode">hScrollBarMode</a>();
        vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( hauto_id, hm == QScrollView::Auto );
        vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( haoff_id, hm == QScrollView::AlwaysOff );
        vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( haon_id, hm == QScrollView::AlwaysOn );

        vp_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( corn_id, !!vp-&gt;<a href="qscrollview.html#cornerWidget">cornerWidget</a>() );
    }

    void doFMenuItem(int id)
    {
        if (id &amp; style_id) {
            int sty;

            if (id == style_id) {
                sty = 0;
            } else if (id &amp; QFrame::MShape) {
<a name="x709"></a>                sty = vp-&gt;<a href="qframe.html#frameStyle">frameStyle</a>()&amp;QFrame::MShadow;
                sty = (sty ? sty : <a href="qframe.html">QFrame</a>::Plain) | (id&amp;QFrame::MShape);
            } else {
                sty = vp-&gt;<a href="qframe.html#frameStyle">frameStyle</a>()&amp;QFrame::MShape;
                sty = (sty ? sty : <a href="qframe.html">QFrame</a>::Box) | (id&amp;QFrame::MShadow);
            }
<a name="x713"></a>            vp-&gt;<a href="qframe.html#setFrameStyle">setFrameStyle</a>(sty);
        } else if (id &amp; lw_id) {
<a name="x714"></a>            vp-&gt;<a href="qframe.html#setLineWidth">setLineWidth</a>(id&amp;~lw_id);
        } else if (id &amp; mlw_id) {
<a name="x716"></a>            vp-&gt;<a href="qframe.html#setMidLineWidth">setMidLineWidth</a>(id&amp;~mlw_id);
        } else {
<a name="x715"></a>            vp-&gt;<a href="qframe.html#setMargin">setMargin</a>(id&amp;~mw_id);
        }

<a name="x749"></a>        vp-&gt;<a href="qwidget.html#update">update</a>();
        setFMenuItems();
    }

    void setFMenuItems()
    {
        int sty = vp-&gt;<a href="qframe.html#frameStyle">frameStyle</a>();

        f_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( style_id, !sty );

        for (int i=1; i &lt;= f_laststyle; i++) {
<a name="x730"></a>            int id = f_options-&gt;<a href="qpopupmenu.html#idAt">idAt</a>(i);
            if (id &amp; QFrame::MShape)
                f_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( id,
                    ((id&amp;QFrame::MShape) == (sty&amp;QFrame::MShape)) );
            else
                f_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( id,
                    ((id&amp;QFrame::MShadow) == (sty&amp;QFrame::MShadow)) );
        }

        for (int lw=1; lw&lt;=max_lw; lw++)
<a name="x710"></a>            lw_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( lw_id|lw, vp-&gt;<a href="qframe.html#lineWidth">lineWidth</a>() == lw );

        for (int mlw=0; mlw&lt;=max_mlw; mlw++)
<a name="x712"></a>            mlw_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( mlw_id|mlw, vp-&gt;<a href="qframe.html#midLineWidth">midLineWidth</a>() == mlw );

        for (int mw=0; mw&lt;=max_mw; mw++)
<a name="x711"></a>            mw_options-&gt;<a href="qmenudata.html#setItemChecked">setItemChecked</a>( mw_id|mw, vp-&gt;<a href="qframe.html#margin">margin</a>() == mw );
    }

private:
    <a href="qscrollview.html">QScrollView</a>* vp;
    <a href="qpopupmenu.html">QPopupMenu</a>* vp_options;
    <a href="qpopupmenu.html">QPopupMenu</a>* f_options;
    <a href="qpopupmenu.html">QPopupMenu</a>* lw_options;
    <a href="qpopupmenu.html">QPopupMenu</a>* mlw_options;
    <a href="qpopupmenu.html">QPopupMenu</a>* mw_options;
    <a href="qsizegrip.html">QSizeGrip</a>* corner;

    int vauto_id, vaoff_id, vaon_id,
        hauto_id, haoff_id, haon_id,
        corn_id;

    int f_laststyle;
};

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

    ScrollViewExample ve1(1,0,"ve1");
    ScrollViewExample ve2(2,0,"ve2");
    ScrollViewExample ve3(3,0,"ve3");
    ve1.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Scrollviews");
    ve1.<a href="qwidget.html#show">show</a>();
    ve2.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Scrollviews");
    ve2.<a href="qwidget.html#show">show</a>();
    ve3.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Scrollviews");
    ve3.<a href="qwidget.html#show">show</a>();

    QObject::<a href="qobject.html#connect">connect</a>(qApp, SIGNAL(<a href="qapplication.html#lastWindowClosed">lastWindowClosed</a>()), qApp, SLOT(<a href="qapplication.html#quit">quit</a>()));

    return a.<a href="qapplication.html#exec">exec</a>();
}

#include "scrollview.moc"
</pre>

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

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