<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/tutorial2.doc:7 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>chart/canvasview.cpp Example File</title> <style type="text/css"><!-- fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <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 <<a href="qcursor-h.html">qcursor.h</a>> #include <<a href="qpoint-h.html">qpoint.h</a>> #include <<a href="qpopupmenu-h.html">qpopupmenu.h</a>> #include <<a href="qstatusbar-h.html">qstatusbar.h</a>> void CanvasView::<a href="qscrollview.html#contentsContextMenuEvent">contentsContextMenuEvent</a>( <a href="qcontextmenuevent.html">QContextMenuEvent</a> * ) { ((ChartForm*)<a href="qobject.html#parent">parent</a>())->optionsMenu->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>()->resize( e-><a href="qresizeevent.html#size">size</a>().width(), e-><a href="qresizeevent.html#size">size</a>().height() ); ((ChartForm*)<a href="qobject.html#parent">parent</a>())->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>()->collisions( e-><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)->rtti() == CanvasText::CANVAS_TEXT ) { m_movingItem = *it; m_pos = e-><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-><a href="qmouseevent.html#pos">pos</a>() - m_pos; m_movingItem->moveBy( offset.<a href="qpoint.html#x">x</a>(), offset.<a href="qpoint.html#y">y</a>() ); m_pos = e-><a href="qmouseevent.html#pos">pos</a>(); ChartForm *form = (ChartForm*)<a href="qobject.html#parent">parent</a>(); form->setChanged( TRUE ); int chartType = form->chartType(); CanvasText *item = (CanvasText*)m_movingItem; int i = item->index(); (*m_elements)[i].setProX( chartType, item->x() / canvas()->width() ); (*m_elements)[i].setProY( chartType, item->y() / canvas()->height() ); <a href="qcanvasview.html#canvas">canvas</a>()->update(); } } </pre><!-- eof --> <p><address><hr><div align=center> <table width=100% cellspacing=0 border=0><tr> <td>Copyright © 2007 <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> <td align=right><div align=right>Qt 3.3.8</div> </table></div></address></body> </html>