summaryrefslogtreecommitdiffstats
path: root/doc/html/tooltip-example.html
blob: e698088693e46d1f7e259f9b5adb67efd48d8360 (plain)
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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
<!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/examples/tooltip/tooltip.doc:4 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Advanced use of tool tips</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>Advanced use of tool tips</h1>

   
<p> 
This example widget demonstrates how to use tool tips for static and
dynamic regions within a widget.
<p> It displays two blue and one red rectangle.  The blue ones move every
time you click on them, the red one is static.  There are dynamic
tool tips on the blue rectangles and a static tool tip on the red one.
<p> <hr>
<p> Header file:
<p> <pre>/****************************************************************************
** $Id: qt/tooltip.h   3.3.8   edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
**
** This file is part of an example program for TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include &lt;<a href="qwidget-h.html">qwidget.h</a>&gt;
#include &lt;<a href="qtooltip-h.html">qtooltip.h</a>&gt;


class DynamicTip : public <a href="qtooltip.html">TQToolTip</a>
{
public:
    DynamicTip( <a href="qwidget.html">TQWidget</a> * parent );

protected:
    void maybeTip( const <a href="qpoint.html">TQPoint</a> &amp; );
};


class TellMe : public <a href="qwidget.html">TQWidget</a>
{
    <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
public:
    TellMe( <a href="qwidget.html">TQWidget</a> * parent = 0, const char * name = 0 );
    ~TellMe();

    <a href="qrect.html">TQRect</a> tip( const <a href="qpoint.html">TQPoint</a> &amp; );

protected:
    void paintEvent( <a href="qpaintevent.html">TQPaintEvent</a> * );
    void mousePressEvent( <a href="qmouseevent.html">TQMouseEvent</a> * );
    void resizeEvent( <a href="qresizeevent.html">TQResizeEvent</a> * );

private:
    <a href="qrect.html">TQRect</a> randomRect();

    <a href="qrect.html">TQRect</a> r1, r2, r3;
    DynamicTip * t;
};
</pre>

<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/tooltip.cpp   3.3.8   edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
**
** This file is part of an example program for TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include "tooltip.h"
#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
#include &lt;stdlib.h&gt;


<a name="f251"></a>DynamicTip::DynamicTip( <a href="qwidget.html">TQWidget</a> * parent )
    : <a href="qtooltip.html">TQToolTip</a>( parent )
{
    // no explicit initialization needed
}


<a name="x451"></a>void DynamicTip::<a href="qtooltip.html#maybeTip">maybeTip</a>( const <a href="qpoint.html">TQPoint</a> &amp;pos )
{
    if ( !parentWidget()-&gt;inherits( "TellMe" ) )
        return;

    <a href="qrect.html">TQRect</a> r( ((TellMe*)<a href="qtooltip.html#parentWidget">parentWidget</a>())-&gt;tip(pos) );
<a name="x448"></a>    if ( !r.<a href="qrect.html#isValid">isValid</a>() )
        return;

    <a href="qstring.html">TQString</a> s;
<a name="x449"></a><a name="x447"></a>    s.<a href="qstring.html#sprintf">sprintf</a>( "position: %d,%d", r.<a href="qrect.html#center">center</a>().x(), r.<a href="qrect.html#center">center</a>().y() );
    tip( r, s );
}


<a name="f252"></a>TellMe::TellMe( <a href="qwidget.html">TQWidget</a> * parent , const char * name  )
    : <a href="qwidget.html">TQWidget</a>( parent, name )
{
    <a href="qwidget.html#setMinimumSize">setMinimumSize</a>( 30, 30 );
    r1 = randomRect();
    r2 = randomRect();
    r3 = randomRect();

    t = new DynamicTip( this );

<a name="x450"></a>    TQToolTip::<a href="qtooltip.html#add">add</a>( this, r3, "this color is called red" ); // &lt;- helpful
}


TellMe::~TellMe()
{
    delete t;
    t = 0;
}


void TellMe::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">TQPaintEvent</a> * e )
{
    <a href="qpainter.html">TQPainter</a> p( this );

    // I try to be efficient here, and repaint only what's needed

<a name="x446"></a>    if ( e-&gt;<a href="qpaintevent.html#rect">rect</a>().intersects( r1 ) ) {
<a name="x445"></a>        p.<a href="qpainter.html#setBrush">setBrush</a>( blue );
<a name="x444"></a>        p.<a href="qpainter.html#drawRect">drawRect</a>( r1 );
    }

    if ( e-&gt;<a href="qpaintevent.html#rect">rect</a>().intersects( r2 ) ) {
        p.<a href="qpainter.html#setBrush">setBrush</a>( blue );
        p.<a href="qpainter.html#drawRect">drawRect</a>( r2 );
    }

    if ( e-&gt;<a href="qpaintevent.html#rect">rect</a>().intersects( r3 ) ) {
        p.<a href="qpainter.html#setBrush">setBrush</a>( red );
        p.<a href="qpainter.html#drawRect">drawRect</a>( r3 );
    }
}


<a name="x452"></a>void TellMe::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> * e )
{
<a name="x443"></a>    if ( r1.contains( e-&gt;<a href="qmouseevent.html#pos">pos</a>() ) )
        r1 = randomRect();
    if ( r2.contains( e-&gt;<a href="qmouseevent.html#pos">pos</a>() ) )
        r2 = randomRect();
    <a href="qwidget.html#repaint">repaint</a>();
}


<a name="x454"></a>void TellMe::<a href="qwidget.html#resizeEvent">resizeEvent</a>( <a href="qresizeevent.html">TQResizeEvent</a> * )
{
    if ( !rect().contains( r1 ) )
         r1 = randomRect();
    if ( !rect().contains( r2 ) )
         r2 = randomRect();
}


TQRect <a name="f253"></a>TellMe::randomRect()
{
    return TQRect( ::rand() % (<a href="qwidget.html#width">width</a>() - 20), ::rand() % (<a href="qwidget.html#height">height</a>() - 20),
                  20, 20 );
}


TQRect <a name="f254"></a>TellMe::tip( const <a href="qpoint.html">TQPoint</a> &amp; p )
{
    if ( r1.contains( p ) )
        return r1;
    else if ( r2.contains( p ) )
        return r2;
    else
        return TQRect( 0,0, -1,-1 );
}
</pre>

<p> <hr>
<p> Main:
<p> <pre>/****************************************************************************
** $Id: qt/main.cpp   3.3.8   edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
**
** This file is part of an example program for TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
#include "tooltip.h"

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

    TellMe mw;
    mw.<a href="qwidget.html#setCaption">setCaption</a>( "TQt Example - Dynamic Tool Tips" );
    a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &amp;mw );
    mw.<a href="qwidget.html#show">show</a>();

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

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

<!-- 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>