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
|
/******************************************************************************
*
* Copyright (C) 2002 Hugo PEREIRA <mailto: hugo.pereira@free.fr>
*
* This is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This software is distributed in the hope that it will be useful, but WITHOUT
* Any WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/
#include "BusyWidget.h"
#include "Debug.h"
#include <QPainter>
#include <QPainterPath>
//__________________________________________________________________________
BusyWidget::BusyWidget( QWidget* parent, Location location ):
QWidget( parent ),
Counter( "BusyWidget" ),
location_( location )
{
Debug::Throw( "BusyWidget::BusyWidget.\n" );
// setup widget
setAttribute(Qt::WA_OpaquePaintEvent, false);
setFocusPolicy(Qt::NoFocus);
setAttribute(Qt::WA_TransparentForMouseEvents, true);
setContextMenuPolicy(Qt::NoContextMenu);
setFixedSize( sizeHint() );
setOpacity( 150 );
// setup animation
animation_ = new QPropertyAnimation( this );
animation_->setStartValue( 0 );
animation_->setEndValue( 360 );
animation_->setPropertyName( "angle" );
animation_->setTargetObject( this );
animation_->setEasingCurve( QEasingCurve::Linear );
animation_->setDuration( 2000 );
animation_->setLoopCount( -1 );
// setup painter path
const QRectF outerBoundingRect( -radius_, -radius_, 2*radius_, 2*radius_ );
const QRectF innerBoundingRect( outerBoundingRect.adjusted( thickness_, thickness_, -thickness_, -thickness_ ) );
const QRectF boundingRect( 0, 0, thickness_, thickness_ );
path_.moveTo( radius_, 0 );
path_.arcTo( outerBoundingRect, 0, 90 );
path_.arcTo( boundingRect.translated( -thickness_/2, -radius_ ), 90, 180 );
path_.arcTo( innerBoundingRect, 90, -90 );
path_.arcTo( boundingRect.translated( radius_-thickness_, -thickness_/2 ), 180, 180 );
// setup event filter
parent->installEventFilter( this );
_adjustPosition();
}
//_____________________________________________________________
void BusyWidget::setOpacity( int value )
{
if( opacity_ == value ) return;
opacity_ = value;
// update palette
QPalette palette( this->palette() );
QColor foreground( palette.color( foregroundRole() ) );
QColor background( palette.color( backgroundRole() ) );
foreground.setAlpha( opacity_ );
background.setAlpha( opacity_ );
palette.setColor( foregroundRole(), foreground );
palette.setColor( backgroundRole(), background );
setPalette( palette );
}
//__________________________________________________________________________
bool BusyWidget::eventFilter( QObject* object, QEvent* event )
{
switch( event->type() )
{
case QEvent::Resize:
_adjustPosition();
break;
default: break;
}
return QWidget::eventFilter( object, event );
}
//__________________________________________________________________________
void BusyWidget::start()
{
Debug::Throw( "BusyWidget::start.\n" );
if( timer_.isActive() ) return;
if( delay_ >= 0 ) timer_.start( delay_, this );
else {
if( animation_->state() == QAbstractAnimation::Stopped ) animation_->start();
if( !isVisible() ) show();
}
}
//__________________________________________________________________________
void BusyWidget::stop()
{
Debug::Throw( "BusyWidget::stop.\n" );
if( timer_.isActive() ) timer_.stop();
if( animation_->state() != QAbstractAnimation::Stopped ) animation_->stop();
if( isVisible() ) hide();
}
//__________________________________________________________________________
void BusyWidget::paintEvent( QPaintEvent* event )
{
QPainter painter( this );
painter.setClipRegion( event->region() );
painter.setRenderHints( QPainter::Antialiasing );
// indicator
painter.translate( 0.5+width()/2, 0.5+height()/2 );
painter.setPen( palette().color( foregroundRole() ) );
painter.setBrush( palette().color( backgroundRole() ) );
painter.rotate( angle_ );
painter.drawPath( path_ );
painter.rotate( 180 );
painter.drawPath( path_ );
}
//__________________________________________________________________________
void BusyWidget::timerEvent( QTimerEvent* event )
{
if( event->timerId() == timer_.timerId() )
{
timer_.stop();
if( animation_->state() == QAbstractAnimation::Stopped ) animation_->start();
if( !isVisible() ) show();
} else return QWidget::timerEvent( event );
}
//_____________________________________________________________
void BusyWidget::_adjustPosition()
{
QWidget* parent( parentWidget() );
if( !parent ) return;
switch( location_ )
{
case Location::Center: move( (parent->width()-width())/2, (parent->height()-height())/2 ); break;
case Location::TopLeft: move( margin_, margin_ ); break;
case Location::TopRight: move( parent->width()-width()-margin_, margin_ ); break;
case Location::BottomLeft: move( margin_, parent->height()-height()-margin_ ); break;
case Location::BottomRight: move( parent->width()-width()-margin_, parent->height()-height()-margin_ ); break;
}
}
|
