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
|
<!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/hello/hello.doc:5 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Hello, World</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>Hello, World</h1>
<p>
This example brings up the words "Hello, World" moving up and down,
and in different colors.
<p> <hr>
<p> Header file:
<p> <pre>/****************************************************************************
** $Id: qt/hello.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.
**
*****************************************************************************/
#ifndef HELLO_H
#define HELLO_H
#include <<a href="qwidget-h.html">ntqwidget.h</a>>
class Hello : public <a href="ntqwidget.html">TQWidget</a>
{
<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
public:
Hello( const char *text, TQWidget *parent=0, const char *name=0 );
signals:
void clicked();
protected:
void mouseReleaseEvent( <a href="qmouseevent.html">TQMouseEvent</a> * );
void paintEvent( <a href="qpaintevent.html">TQPaintEvent</a> * );
private slots:
void animate();
private:
<a href="ntqstring.html">TQString</a> t;
int b;
};
#endif
</pre>
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/hello.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 "hello.h"
#include <<a href="qpushbutton-h.html">ntqpushbutton.h</a>>
#include <<a href="qtimer-h.html">ntqtimer.h</a>>
#include <<a href="qpainter-h.html">ntqpainter.h</a>>
#include <<a href="qpixmap-h.html">ntqpixmap.h</a>>
/*
Constructs a Hello widget. Starts a 40 ms animation timer.
*/
<a name="f473"></a>Hello::Hello( const char *text, TQWidget *parent, const char *name )
: <a href="ntqwidget.html">TQWidget</a>(parent,name), t(text), b(0)
{
<a href="ntqtimer.html">TQTimer</a> *timer = new <a href="ntqtimer.html">TQTimer</a>(this);
<a name="x1640"></a> <a href="ntqobject.html#connect">connect</a>( timer, SIGNAL(<a href="ntqtimer.html#timeout">timeout</a>()), SLOT(animate()) );
<a name="x1639"></a> timer-><a href="ntqtimer.html#start">start</a>( 40 );
<a href="ntqwidget.html#resize">resize</a>( 260, 130 );
}
/*
This private slot is called each time the timer fires.
*/
void <a name="f474"></a>Hello::animate()
{
b = (b + 1) & 15;
<a href="ntqwidget.html#repaint">repaint</a>( FALSE );
}
/*
Handles mouse button release events for the Hello widget.
We emit the clicked() signal when the mouse is released inside
the widget.
*/
<a name="x1641"></a>void Hello::<a href="ntqwidget.html#mouseReleaseEvent">mouseReleaseEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
{
if ( <a href="ntqwidget.html#rect">rect</a>().contains( e-><a href="qmouseevent.html#pos">pos</a>() ) )
emit clicked();
}
/*
Handles paint events for the Hello widget.
Flicker-free update. The text is first drawn in the pixmap and the
pixmap is then blt'ed to the screen.
*/
void Hello::<a href="ntqwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">TQPaintEvent</a> * )
{
static int sin_tbl[16] = {
0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38};
if ( t.isEmpty() )
return;
// 1: Compute some sizes, positions etc.
<a href="ntqfontmetrics.html">TQFontMetrics</a> fm = <a href="ntqwidget.html#fontMetrics">fontMetrics</a>();
<a name="x1631"></a> int w = fm.<a href="ntqfontmetrics.html#width">width</a>(t) + 20;
<a name="x1630"></a> int h = fm.<a href="ntqfontmetrics.html#height">height</a>() * 2;
int pmx = <a href="ntqwidget.html#width">width</a>()/2 - w/2;
int pmy = <a href="ntqwidget.html#height">height</a>()/2 - h/2;
// 2: Create the pixmap and fill it with the widget's background
<a href="ntqpixmap.html">TQPixmap</a> pm( w, h );
<a name="x1638"></a> pm.<a href="ntqpixmap.html#fill">fill</a>( this, pmx, pmy );
// 3: Paint the pixmap. Cool wave effect
<a href="ntqpainter.html">TQPainter</a> p;
int x = 10;
<a name="x1629"></a> int y = h/2 + fm.<a href="ntqfontmetrics.html#descent">descent</a>();
int i = 0;
<a name="x1633"></a> p.<a href="ntqpainter.html#begin">begin</a>( &pm );
<a name="x1636"></a> p.<a href="ntqpainter.html#setFont">setFont</a>( <a href="ntqwidget.html#font">font</a>() );
while ( !t[i].isNull() ) {
int i16 = (b+i) & 15;
p.<a href="ntqpainter.html#setPen">setPen</a>( TQColor((15-i16)*16,255,255,TQColor::Hsv) );
p.<a href="ntqpainter.html#drawText">drawText</a>( x, y-sin_tbl[i16]*h/800, t.mid(i,1), 1 );
x += fm.<a href="ntqfontmetrics.html#width">width</a>( t[i] );
i++;
}
<a name="x1635"></a> p.<a href="ntqpainter.html#end">end</a>();
// 4: Copy the pixmap to the Hello widget
<a href="ntqimage.html#bitBlt">bitBlt</a>( this, pmx, pmy, &pm );
}
</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 "hello.h"
#include <<a href="qapplication-h.html">ntqapplication.h</a>>
/*
The program starts here. It parses the command line and builds a message
string to be displayed by the Hello widget.
*/
int main( int argc, char **argv )
{
<a href="ntqapplication.html">TQApplication</a> a(argc,argv);
<a href="ntqstring.html">TQString</a> s;
for ( int i=1; i<argc; i++ ) {
s += argv[i];
if ( i<argc-1 )
s += " ";
}
if ( s.<a href="ntqstring.html#isEmpty">isEmpty</a>() )
s = "Hello, World";
Hello h( s );
#ifndef QT_NO_WIDGET_TOPEXTRA // for TQt/Embedded minimal build
h.<a href="ntqwidget.html#setCaption">setCaption</a>( "TQt says hello" );
#endif
TQObject::<a href="ntqobject.html#connect">connect</a>( &h, SIGNAL(clicked()), &a, SLOT(<a href="ntqapplication.html#quit">quit</a>()) );
<a name="x1650"></a> h.<a href="ntqwidget.html#setFont">setFont</a>( TQFont("times",32,TQFont::Bold) ); // default font
<a name="x1648"></a> h.<a href="ntqwidget.html#setBackgroundColor">setBackgroundColor</a>( TQt::white ); // default bg color
a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( &h );
h.<a href="ntqwidget.html#show">show</a>();
return a.<a href="ntqapplication.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 © 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>
|
