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98 lines
4.1 KiB
98 lines
4.1 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/tutorial2.doc:7 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>chart/canvasview.cpp Example File</title>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<font color="#004faf">Grouped Classes</font></a>
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<font color="#004faf">Functions</font></a>
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</td>
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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>
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<pre>#include "canvasview.h"
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#include "chartform.h"
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#include <<a href="qcursor-h.html">qcursor.h</a>>
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#include <<a href="qpoint-h.html">qpoint.h</a>>
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#include <<a href="qpopupmenu-h.html">qpopupmenu.h</a>>
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#include <<a href="qstatusbar-h.html">qstatusbar.h</a>>
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void CanvasView::<a href="qscrollview.html#contentsContextMenuEvent">contentsContextMenuEvent</a>( <a href="qcontextmenuevent.html">QContextMenuEvent</a> * )
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{
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((ChartForm*)<a href="qobject.html#parent">parent</a>())->optionsMenu->exec( QCursor::<a href="qcursor.html#pos">pos</a>() );
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}
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void CanvasView::<a href="qscrollview.html#viewportResizeEvent">viewportResizeEvent</a>( <a href="qresizeevent.html">QResizeEvent</a> *e )
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{
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<a href="qcanvasview.html#canvas">canvas</a>()->resize( e-><a href="qresizeevent.html#size">size</a>().width(), e-><a href="qresizeevent.html#size">size</a>().height() );
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((ChartForm*)<a href="qobject.html#parent">parent</a>())->drawElements();
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}
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void CanvasView::<a href="qscrollview.html#contentsMousePressEvent">contentsMousePressEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *e )
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{
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<a href="qcanvasitemlist.html">QCanvasItemList</a> list = <a href="qcanvasview.html#canvas">canvas</a>()->collisions( e-><a href="qmouseevent.html#pos">pos</a>() );
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for ( QCanvasItemList::iterator it = list.<a href="qvaluelist.html#begin">begin</a>(); it != list.<a href="qvaluelist.html#end">end</a>(); ++it )
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if ( (*it)->rtti() == CanvasText::CANVAS_TEXT ) {
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m_movingItem = *it;
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m_pos = e-><a href="qmouseevent.html#pos">pos</a>();
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return;
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}
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m_movingItem = 0;
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}
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void CanvasView::<a href="qscrollview.html#contentsMouseMoveEvent">contentsMouseMoveEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *e )
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{
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if ( m_movingItem ) {
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<a href="qpoint.html">QPoint</a> offset = e-><a href="qmouseevent.html#pos">pos</a>() - m_pos;
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m_movingItem->moveBy( offset.<a href="qpoint.html#x">x</a>(), offset.<a href="qpoint.html#y">y</a>() );
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m_pos = e-><a href="qmouseevent.html#pos">pos</a>();
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ChartForm *form = (ChartForm*)<a href="qobject.html#parent">parent</a>();
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form->setChanged( TRUE );
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int chartType = form->chartType();
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CanvasText *item = (CanvasText*)m_movingItem;
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int i = item->index();
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(*m_elements)[i].setProX( chartType, item->x() / canvas()->width() );
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(*m_elements)[i].setProY( chartType, item->y() / canvas()->height() );
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<a href="qcanvasview.html#canvas">canvas</a>()->update();
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}
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}
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</pre><!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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</table></div></address></body>
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</html>
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