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kanimatedbutton.cpp
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1/* This file is part of the KDE libraries
2 Copyright (C) 2000 Kurt Granroth <granroth@kde.org>
3 Copyright (C) 2006 Hamish Rodda <rodda@kde.org>
4 Copyright (C) 2008 Pino Toscano <pino@kde.org>
5
6 This library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public
8 License version 2 as published by the Free Software Foundation.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public License
16 along with this library; see the file COPYING.LIB. If not, write to
17 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
19*/
20
21#include <kanimatedbutton.h>
22
23#include <QAction>
24#include <QPixmap>
25#include <QTimer>
26#include <QImage>
27#include <QToolBar>
28#include <QPainter>
29#include <QMovie>
30
31#include <kdebug.h>
32#include <kiconloader.h>
33
34class KAnimatedButtonPrivate
35{
36public:
37 KAnimatedButtonPrivate(KAnimatedButton *qq)
38 : q(qq), movie(0)
39 {
40 }
41
42 void updateCurrentIcon();
43 void _k_movieFrameChanged(int number);
44 void _k_movieFinished();
45
46 KAnimatedButton *q;
47 QMovie *movie;
48
49 int frames;
50 int current_frame;
51 QPixmap pixmap;
52 QTimer timer;
53 QString icon_name;
54 QVector<QPixmap*> framesCache; // We keep copies of each frame so that
55 // the icon code can properly cache them in QPixmapCache,
56 // and not fill it up with dead copies
57};
58
59KAnimatedButton::KAnimatedButton( QWidget *parent )
60 : QToolButton(parent), d(new KAnimatedButtonPrivate(this))
61{
62 connect( &d->timer, SIGNAL(timeout()), this, SLOT(slotTimerUpdate()));
63}
64
65KAnimatedButton::~KAnimatedButton()
66{
67 d->timer.stop();
68 qDeleteAll(d->framesCache);
69 delete d->movie;
70
71 delete d;
72}
73
74void KAnimatedButton::start()
75{
76 if (d->movie) {
77 d->movie->start();
78 } else {
79 d->current_frame = 0;
80 d->timer.start(50);
81 }
82}
83
84void KAnimatedButton::stop()
85{
86 if (d->movie) {
87 d->movie->stop();
88 d->movie->jumpToFrame(0);
89 d->_k_movieFrameChanged(0);
90 } else {
91 d->current_frame = 0;
92 d->timer.stop();
93 d->updateCurrentIcon();
94 }
95}
96
97void KAnimatedButton::setIcons( const QString& icons )
98{
99 if ( d->icon_name == icons )
100 return;
101
102 d->timer.stop();
103 d->icon_name = icons;
104 updateIcons();
105}
106
107QString KAnimatedButton::icons( ) const
108{
109 return d->icon_name;
110}
111
112void KAnimatedButton::slotTimerUpdate()
113{
114 if(!isVisible())
115 return;
116
117 d->current_frame++;
118 if (d->current_frame == d->frames)
119 d->current_frame = 0;
120
121 d->updateCurrentIcon();
122}
123
124void KAnimatedButtonPrivate::updateCurrentIcon()
125{
126 if (pixmap.isNull())
127 return;
128
129 QPixmap* frame = framesCache[current_frame];
130 if (!frame)
131 {
132 const int icon_size = q->iconDimensions();
133 const int row_size = pixmap.width() / icon_size;
134 const int row = current_frame / row_size;
135 const int column = current_frame % row_size;
136 frame = new QPixmap(icon_size, icon_size);
137 frame->fill(Qt::transparent);
138 QPainter p(frame);
139 p.drawPixmap(QPoint(0, 0), pixmap, QRect(column * icon_size, row * icon_size, icon_size, icon_size));
140 p.end();
141 framesCache[current_frame] = frame;
142 }
143
144 q->setIcon(QIcon(*frame));
145}
146
147void KAnimatedButtonPrivate::_k_movieFrameChanged(int number)
148{
149 Q_UNUSED(number);
150 q->setIcon(QIcon(movie->currentPixmap()));
151}
152
153void KAnimatedButtonPrivate::_k_movieFinished()
154{
155 // if not running, make it loop
156 if (movie->state() == QMovie::NotRunning) {
157 movie->start();
158 }
159}
160
161void KAnimatedButton::updateIcons()
162{
163 const int icon_size = iconDimensions();
164 d->pixmap = QPixmap();
165 QMovie *movie = KIconLoader::global()->loadMovie(d->icon_name, KIconLoader::NoGroup, -icon_size);
166 if (movie) {
167 d->frames = 0;
168 movie->setCacheMode(QMovie::CacheAll);
169 connect(movie, SIGNAL(frameChanged(int)), this, SLOT(_k_movieFrameChanged(int)));
170 connect(movie, SIGNAL(finished()), this, SLOT(_k_movieFinished()));
171 } else {
172 const QString path = KIconLoader::global()->iconPath(d->icon_name, -icon_size);
173 QImage img(path);
174 if (img.isNull())
175 return;
176
177 if ((img.width() % icon_size != 0) || (img.height() % icon_size != 0))
178 return;
179
180 d->frames = (img.height() / icon_size) * (img.width() / icon_size);
181 d->pixmap = QPixmap::fromImage(img);
182 }
183
184 d->current_frame = 0;
185 qDeleteAll(d->framesCache);
186 d->framesCache.fill(0);
187 d->framesCache.resize(d->frames);
188 delete d->movie;
189 d->movie = movie;
190
191 if (d->movie) {
192 d->movie->jumpToFrame(0);
193 d->_k_movieFrameChanged(0);
194 } else {
195 d->updateCurrentIcon();
196 }
197}
198
199int KAnimatedButton::iconDimensions() const
200{
201 return qMin(iconSize().width(), iconSize().height());
202}
203
204#include "kanimatedbutton.moc"
KAnimatedButton
An extended version of QToolButton which can display an animated icon.
Definition: kanimatedbutton.h:39
KAnimatedButton::stop
void stop()
Stops the animation.
Definition: kanimatedbutton.cpp:84
KAnimatedButton::setIcons
void setIcons(const QString &icons)
Sets the name of the animated icons to load.
Definition: kanimatedbutton.cpp:97
KAnimatedButton::KAnimatedButton
KAnimatedButton(QWidget *parent=0L)
Construct an animated tool button.
Definition: kanimatedbutton.cpp:59
KAnimatedButton::slotTimerUpdate
void slotTimerUpdate()
Definition: kanimatedbutton.cpp:112
KAnimatedButton::start
void start()
Starts the animation from frame 1.
Definition: kanimatedbutton.cpp:74
KAnimatedButton::icons
QString icons
Definition: kanimatedbutton.h:41
KAnimatedButton::iconDimensions
int iconDimensions() const
Returns the current maximum dimension (width or length) for an icon.
Definition: kanimatedbutton.cpp:199
KAnimatedButton::~KAnimatedButton
virtual ~KAnimatedButton()
Destructor.
Definition: kanimatedbutton.cpp:65
KAnimatedButton::updateIcons
void updateIcons()
Updates the icons by reloading them if required.
Definition: kanimatedbutton.cpp:161
KIconLoader::NoGroup
@ NoGroup
No group.
Definition: kiconloader.h:129
KIconLoader::global
static KIconLoader * global()
Returns the global icon loader initialized with the global KComponentData.
KIconLoader::loadMovie
QMovie * loadMovie(const QString &name, KIconLoader::Group group, int size=0, QObject *parent=0) const
Loads an animated icon.
Definition: kiconloader.cpp:1240
KIconLoader::iconPath
QString iconPath(const QString &name, int group_or_size, bool canReturnNull=false) const
Returns the path of an icon.
Definition: kiconloader.cpp:1009
QToolButton
QWidget
kanimatedbutton.h
kdebug.h
kiconloader.h
timeout
int timeout
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