blob: 7a3b0031c3e2d7c1408dc596d6a4e5d075dc4d81 (
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
|
/****************************************************************************
**
** Implementation of a widget that draws a rubberband. Designed to be used
** in an X11 overlay visual
**
** Copyright (C) 1999-2008 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "rubberbandwidget.h"
#include <qpainter.h>
RubberbandWidget::RubberbandWidget( QColor transparentColor, QWidget *parent,
const char *name, WFlags f )
: QWidget( parent, name, f )
{
setBackgroundColor( transparentColor );
on = FALSE;
}
void RubberbandWidget::mousePressEvent( QMouseEvent* e )
{
p1 = e->pos();
p2 = p1;
p3 = p1;
on = TRUE;
setMouseTracking( TRUE );
}
void RubberbandWidget::mouseMoveEvent( QMouseEvent* e )
{
if ( on ) {
p2 = e->pos();
QPainter p( this );
// Erase last drawn rubberband:
p.setPen( QPen( backgroundColor(), 3 ) );
p.drawRect( QRect( p1, p3 ) );
// Draw the new one:
p.setPen( QPen( white, 3 ) );
p.drawRect( QRect(p1, p2) );
p3 = p2;
}
}
void RubberbandWidget::mouseReleaseEvent( QMouseEvent* )
{
if ( on ) {
QPainter p ( this );
p.eraseRect( rect() );
}
on = FALSE;
setMouseTracking( FALSE );
}
|
