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Root/branches/xZenu/src/util/doxygen/tmake/example/hello.cpp

Source at commit 1322 created 9 years 5 months ago.
By meklort, Add doxygen to utils folder
1/****************************************************************************
2**
3**
4** Copyright (C) 1992-1998 Troll Tech AS. All rights reserved.
5**
6** This file is part of an example program for Qt. This example
7** program may be used, distributed and modified without limitation.
8**
9*****************************************************************************/
10
11#include "hello.h"
12#include <qpushbutton.h>
13#include <qtimer.h>
14#include <qpainter.h>
15#include <qpixmap.h>
16
17
18/*
19 Constructs a Hello widget. Starts a 40 ms animation timer.
20*/
21
22Hello::Hello( const char *text, QWidget *parent, const char *name )
23 : QWidget(parent,name), t(text), b(0)
24{
25 QTimer *timer = new QTimer(this);
26 connect( timer, SIGNAL(timeout()), SLOT(animate()) );
27 timer->start( 40 );
28
29 resize( 200, 100 );
30}
31
32
33/*
34 This private slot is called each time the timer fires.
35*/
36
37void Hello::animate()
38{
39 b = (b + 1) & 15;
40 repaint( FALSE );
41}
42
43
44/*
45 Handles mouse button release events for the Hello widget.
46
47 We emit the clicked() signal when the mouse is released inside
48 the widget.
49*/
50
51void Hello::mouseReleaseEvent( QMouseEvent *e )
52{
53 if ( rect().contains( e->pos() ) )
54emit clicked();
55}
56
57
58/*
59 Handles paint events for the Hello widget.
60
61 Flicker-free update. The text is first drawn in the pixmap and the
62 pixmap is then blt'ed to the screen.
63*/
64
65void Hello::paintEvent( QPaintEvent * )
66{
67 static int sin_tbl[16] = {
680, 38, 71, 92, 100, 92, 71, 38,0, -38, -71, -92, -100, -92, -71, -38};
69
70 if ( t.isEmpty() )
71return;
72
73 // 1: Compute some sizes, positions etc.
74 QFontMetrics fm = fontMetrics();
75 int w = fm.width(t) + 20;
76 int h = fm.height() * 2;
77 int pmx = width()/2 - w/2;
78 int pmy = height()/2 - h/2;
79
80 // 2: Create the pixmap and fill it with the widget's background
81 QPixmap pm( w, h );
82 pm.fill( this, pmx, pmy );
83
84 // 3: Paint the pixmap. Cool wave effect
85 QPainter p;
86 int x = 10;
87 int y = h/2 + fm.descent();
88 int i = 0;
89 p.begin( &pm );
90 p.setFont( font() );
91 while ( t[i] ) {
92int i16 = (b+i) & 15;
93 p.setPen( QColor((15-i16)*16,255,255,QColor::Hsv) );
94p.drawText( x, y-sin_tbl[i16]*h/800, &t[i], 1 );
95x += fm.width( t[i] );
96i++;
97 }
98 p.end();
99
100 // 4: Copy the pixmap to the Hello widget
101 bitBlt( this, pmx, pmy, &pm );
102}
103

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