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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>chart/canvasview.cpp Example File</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>chart/canvasview.cpp Example File</h1>

 
<pre>#include "canvasview.h"
#include "chartform.h"

#include &lt;<a href="qcursor-h.html">qcursor.h</a>&gt;
#include &lt;<a href="qpoint-h.html">qpoint.h</a>&gt;
#include &lt;<a href="qpopupmenu-h.html">qpopupmenu.h</a>&gt;
#include &lt;<a href="qstatusbar-h.html">qstatusbar.h</a>&gt;


void CanvasView::<a href="qscrollview.html#contentsContextMenuEvent">contentsContextMenuEvent</a>( <a href="qcontextmenuevent.html">QContextMenuEvent</a> * )
{
    ((ChartForm*)<a href="qobject.html#parent">parent</a>())-&gt;optionsMenu-&gt;exec( QCursor::<a href="qcursor.html#pos">pos</a>() );
}


void CanvasView::<a href="qscrollview.html#viewportResizeEvent">viewportResizeEvent</a>( <a href="qresizeevent.html">QResizeEvent</a> *e )
{
    <a href="qcanvasview.html#canvas">canvas</a>()-&gt;resize( e-&gt;<a href="qresizeevent.html#size">size</a>().width(), e-&gt;<a href="qresizeevent.html#size">size</a>().height() );
    ((ChartForm*)<a href="qobject.html#parent">parent</a>())-&gt;drawElements();
}


void CanvasView::<a href="qscrollview.html#contentsMousePressEvent">contentsMousePressEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *e )
{
    <a href="qcanvasitemlist.html">QCanvasItemList</a> list = <a href="qcanvasview.html#canvas">canvas</a>()-&gt;collisions( e-&gt;<a href="qmouseevent.html#pos">pos</a>() );
    for ( QCanvasItemList::iterator it = list.<a href="qvaluelist.html#begin">begin</a>(); it != list.<a href="qvaluelist.html#end">end</a>(); ++it )
        if ( (*it)-&gt;rtti() == CanvasText::CANVAS_TEXT ) {
            m_movingItem = *it;
            m_pos = e-&gt;<a href="qmouseevent.html#pos">pos</a>();
            return;
        }
    m_movingItem = 0;
}


void CanvasView::<a href="qscrollview.html#contentsMouseMoveEvent">contentsMouseMoveEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *e )
{
    if ( m_movingItem ) {
        <a href="qpoint.html">QPoint</a> offset = e-&gt;<a href="qmouseevent.html#pos">pos</a>() - m_pos;
        m_movingItem-&gt;moveBy( offset.<a href="qpoint.html#x">x</a>(), offset.<a href="qpoint.html#y">y</a>() );
        m_pos = e-&gt;<a href="qmouseevent.html#pos">pos</a>();
        ChartForm *form = (ChartForm*)<a href="qobject.html#parent">parent</a>();
        form-&gt;setChanged( TRUE );
        int chartType = form-&gt;chartType();
        CanvasText *item = (CanvasText*)m_movingItem;
        int i = item-&gt;index();

        (*m_elements)[i].setProX( chartType, item-&gt;x() / canvas()-&gt;width() );
        (*m_elements)[i].setProY( chartType, item-&gt;y() / canvas()-&gt;height() );

        <a href="qcanvasview.html#canvas">canvas</a>()-&gt;update();
    }
}


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