doc/html/chart-canvasview-cpp.html


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97

<!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&nbsp;Classes</font></a>
 | <a href="mainclasses.html">
<font color="#004faf">Main&nbsp;Classes</font></a>
 | <a href="annotated.html">
<font color="#004faf">Annotated</font></a>
 | <a href="groups.html">
<font color="#004faf">Grouped&nbsp;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 &lt;<a href="tqcursor-h.html">tqcursor.h</a>&gt;
#include &lt;<a href="tqpoint-h.html">tqpoint.h</a>&gt;
#include &lt;<a href="tqpopupmenu-h.html">tqpopupmenu.h</a>&gt;
#include &lt;<a href="tqstatusbar-h.html">tqstatusbar.h</a>&gt;


void CanvasView::<a href="tqscrollview.html#contentsContextMenuEvent">contentsContextMenuEvent</a>( <a href="tqcontextmenuevent.html">TQContextMenuEvent</a> * )
{
    ((ChartForm*)<a href="tqobject.html#parent">parent</a>())-&gt;optionsMenu-&gt;exec( TQCursor::<a href="tqcursor.html#pos">pos</a>() );
}


void CanvasView::<a href="tqscrollview.html#viewportResizeEvent">viewportResizeEvent</a>( <a href="tqresizeevent.html">TQResizeEvent</a> *e )
{
    <a href="tqcanvasview.html#canvas">canvas</a>()-&gt;resize( e-&gt;<a href="tqresizeevent.html#size">size</a>().width(), e-&gt;<a href="tqresizeevent.html#size">size</a>().height() );
    ((ChartForm*)<a href="tqobject.html#parent">parent</a>())-&gt;drawElements();
}


void CanvasView::<a href="tqscrollview.html#contentsMousePressEvent">contentsMousePressEvent</a>( <a href="tqmouseevent.html">TQMouseEvent</a> *e )
{
    <a href="tqcanvasitemlist.html">TQCanvasItemList</a> list = <a href="tqcanvasview.html#canvas">canvas</a>()-&gt;collisions( e-&gt;<a href="tqmouseevent.html#pos">pos</a>() );
    for ( TQCanvasItemList::iterator it = list.<a href="tqvaluelist.html#begin">begin</a>(); it != list.<a href="tqvaluelist.html#end">end</a>(); ++it )
        if ( (*it)-&gt;rtti() == CanvasText::CANVAS_TEXT ) {
            m_movingItem = *it;
            m_pos = e-&gt;<a href="tqmouseevent.html#pos">pos</a>();
            return;
        }
    m_movingItem = 0;
}


void CanvasView::<a href="tqscrollview.html#contentsMouseMoveEvent">contentsMouseMoveEvent</a>( <a href="tqmouseevent.html">TQMouseEvent</a> *e )
{
    if ( m_movingItem ) {
        <a href="tqpoint.html">TQPoint</a> offset = e-&gt;<a href="tqmouseevent.html#pos">pos</a>() - m_pos;
        m_movingItem-&gt;moveBy( offset.<a href="tqpoint.html#x">x</a>(), offset.<a href="tqpoint.html#y">y</a>() );
        m_pos = e-&gt;<a href="tqmouseevent.html#pos">pos</a>();
        ChartForm *form = (ChartForm*)<a href="tqobject.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="tqcanvasview.html#canvas">canvas</a>()-&gt;update();
    }
}


</pre><!-- eof -->
<p><address><hr><div align=center>
<table width=100% cellspacing=0 border=0><tr>
<td>Copyright &copy; 2007
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
<td align=right><div align=right>TQt 3.3.8</div>
</table></div></address></body>
</html>