1 | /****************************************************************************
|
---|
2 | ** $Id: tooltip.cpp 2 2005-11-16 15:49:26Z dmik $
|
---|
3 | **
|
---|
4 | ** Copyright (C) 1992-2000 Trolltech 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 "tooltip.h"
|
---|
12 | #include <qapplication.h>
|
---|
13 | #include <qpainter.h>
|
---|
14 | #include <stdlib.h>
|
---|
15 |
|
---|
16 |
|
---|
17 | DynamicTip::DynamicTip( QWidget * parent )
|
---|
18 | : QToolTip( parent )
|
---|
19 | {
|
---|
20 | // no explicit initialization needed
|
---|
21 | }
|
---|
22 |
|
---|
23 |
|
---|
24 | void DynamicTip::maybeTip( const QPoint &pos )
|
---|
25 | {
|
---|
26 | if ( !parentWidget()->inherits( "TellMe" ) )
|
---|
27 | return;
|
---|
28 |
|
---|
29 | QRect r( ((TellMe*)parentWidget())->tip(pos) );
|
---|
30 | if ( !r.isValid() )
|
---|
31 | return;
|
---|
32 |
|
---|
33 | QString s;
|
---|
34 | s.sprintf( "position: %d,%d", r.center().x(), r.center().y() );
|
---|
35 | tip( r, s );
|
---|
36 | }
|
---|
37 |
|
---|
38 |
|
---|
39 | TellMe::TellMe( QWidget * parent , const char * name )
|
---|
40 | : QWidget( parent, name )
|
---|
41 | {
|
---|
42 | setMinimumSize( 30, 30 );
|
---|
43 | r1 = randomRect();
|
---|
44 | r2 = randomRect();
|
---|
45 | r3 = randomRect();
|
---|
46 |
|
---|
47 | t = new DynamicTip( this );
|
---|
48 |
|
---|
49 | QToolTip::add( this, r3, "this color is called red" ); // <- helpful
|
---|
50 | }
|
---|
51 |
|
---|
52 |
|
---|
53 | TellMe::~TellMe()
|
---|
54 | {
|
---|
55 | delete t;
|
---|
56 | t = 0;
|
---|
57 | }
|
---|
58 |
|
---|
59 |
|
---|
60 | void TellMe::paintEvent( QPaintEvent * e )
|
---|
61 | {
|
---|
62 | QPainter p( this );
|
---|
63 |
|
---|
64 | // I try to be efficient here, and repaint only what's needed
|
---|
65 |
|
---|
66 | if ( e->rect().intersects( r1 ) ) {
|
---|
67 | p.setBrush( blue );
|
---|
68 | p.drawRect( r1 );
|
---|
69 | }
|
---|
70 |
|
---|
71 | if ( e->rect().intersects( r2 ) ) {
|
---|
72 | p.setBrush( blue );
|
---|
73 | p.drawRect( r2 );
|
---|
74 | }
|
---|
75 |
|
---|
76 | if ( e->rect().intersects( r3 ) ) {
|
---|
77 | p.setBrush( red );
|
---|
78 | p.drawRect( r3 );
|
---|
79 | }
|
---|
80 | }
|
---|
81 |
|
---|
82 |
|
---|
83 | void TellMe::mousePressEvent( QMouseEvent * e )
|
---|
84 | {
|
---|
85 | if ( r1.contains( e->pos() ) )
|
---|
86 | r1 = randomRect();
|
---|
87 | if ( r2.contains( e->pos() ) )
|
---|
88 | r2 = randomRect();
|
---|
89 | repaint();
|
---|
90 | }
|
---|
91 |
|
---|
92 |
|
---|
93 | void TellMe::resizeEvent( QResizeEvent * )
|
---|
94 | {
|
---|
95 | if ( !rect().contains( r1 ) )
|
---|
96 | r1 = randomRect();
|
---|
97 | if ( !rect().contains( r2 ) )
|
---|
98 | r2 = randomRect();
|
---|
99 | }
|
---|
100 |
|
---|
101 |
|
---|
102 | QRect TellMe::randomRect()
|
---|
103 | {
|
---|
104 | return QRect( ::rand() % (width() - 20), ::rand() % (height() - 20),
|
---|
105 | 20, 20 );
|
---|
106 | }
|
---|
107 |
|
---|
108 |
|
---|
109 | QRect TellMe::tip( const QPoint & p )
|
---|
110 | {
|
---|
111 | if ( r1.contains( p ) )
|
---|
112 | return r1;
|
---|
113 | else if ( r2.contains( p ) )
|
---|
114 | return r2;
|
---|
115 | else
|
---|
116 | return QRect( 0,0, -1,-1 );
|
---|
117 | }
|
---|