kdeui Library API Documentation

kanimwidget.cpp

00001 // -*- c-basic-offset: 2 -*-
00002 
00003 /* This file is part of the KDE libraries
00004    Copyright (C) 2000 Kurt Granroth <granroth@kde.org>
00005 
00006    This library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Library General Public
00008    License version 2 as published by the Free Software Foundation.
00009 
00010    This library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Library General Public License for more details.
00014 
00015    You should have received a copy of the GNU Library General Public License
00016    along with this library; see the file COPYING.LIB.  If not, write to
00017    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00018    Boston, MA 02111-1307, USA.
00019 */
00020 #include <kanimwidget.h>
00021 #include <qpixmap.h>
00022 #include <qtimer.h>
00023 #include <qpainter.h>
00024 #include <qimage.h>
00025 #include <ktoolbar.h>
00026 #include <kdebug.h>
00027 #include <kiconloader.h>
00028 
00029 class KAnimWidgetPrivate
00030 {
00031 public:
00032   bool                   loadingCompleted : 1;
00033   bool                   initDone         : 1;
00034   bool                   transparent      : 1;
00035   int                    frames;
00036   int                    current_frame;
00037   QPixmap                pixmap;
00038   QTimer                 timer;
00039   QString                icon_name;
00040   int                    size;
00041 };
00042 
00043 KAnimWidget::KAnimWidget( const QString& icons, int size, QWidget *parent,
00044                           const char *name )
00045   : QFrame( parent, name ),
00046     d( new KAnimWidgetPrivate )
00047 {
00048   connect( &d->timer, SIGNAL(timeout()), this, SLOT(slotTimerUpdate()));
00049 
00050   if (parent->inherits( "KToolBar" ))
00051     connect(parent, SIGNAL(modechange()), this, SLOT(updateIcons()));
00052 
00053   d->loadingCompleted = false;
00054   d->size = size;
00055   d->initDone = false;
00056   setIcons( icons );
00057   setFrameStyle( StyledPanel | Sunken );
00058 }
00059 
00060 KAnimWidget::~KAnimWidget()
00061 {
00062   d->timer.stop();
00063 
00064   delete d; d = 0;
00065 }
00066 
00067 void KAnimWidget::start()
00068 {
00069   d->current_frame = 0;
00070   d->timer.start( 50 );
00071 }
00072 
00073 void KAnimWidget::stop()
00074 {
00075   d->current_frame = 0;
00076   d->timer.stop();
00077   repaint();
00078 }
00079 
00080 void KAnimWidget::setSize( int size )
00081 {
00082   if ( d->size == size )
00083     return;
00084 
00085   d->size = size;
00086   updateIcons();
00087 }
00088 
00089 void KAnimWidget::setIcons( const QString& icons )
00090 {
00091   if ( d->icon_name == icons )
00092     return;
00093 
00094   d->icon_name = icons;
00095   updateIcons();
00096 }
00097 
00098 void KAnimWidget::showEvent(QShowEvent* e)
00099 {
00100   if (!d->initDone)
00101   {
00102      d->initDone = true;
00103      updateIcons();
00104   }
00105   QFrame::showEvent(e);
00106 }
00107 
00108 void KAnimWidget::hideEvent(QHideEvent* e)
00109 {
00110   QFrame::hideEvent(e);
00111 }
00112 
00113 void KAnimWidget::enterEvent( QEvent *e )
00114 {
00115   setFrameStyle( WinPanel | Raised );
00116 
00117   QFrame::enterEvent( e );
00118 }
00119 
00120 void KAnimWidget::leaveEvent( QEvent *e )
00121 {
00122   setFrameStyle( StyledPanel | Sunken );
00123 
00124   QFrame::enterEvent( e );
00125 }
00126 
00127 void KAnimWidget::mousePressEvent( QMouseEvent *e )
00128 {
00129   QFrame::mousePressEvent( e );
00130 }
00131 
00132 void KAnimWidget::mouseReleaseEvent( QMouseEvent *e )
00133 {
00134   if ( e->button() == LeftButton &&
00135        rect().contains( e->pos() ) )
00136     emit clicked();
00137 
00138   QFrame::mouseReleaseEvent( e );
00139 }
00140 
00141 void KAnimWidget::slotTimerUpdate()
00142 {
00143   if(!isVisible())
00144     return;
00145 
00146   d->current_frame++;
00147   if (d->current_frame == d->frames)
00148      d->current_frame = 0;
00149 
00150   // TODO
00151   // We have to clear the widget when repainting a transparent image
00152   // By doing it like this we get a bit of flicker though. A better
00153   // way might be to merge it with the background in drawContents.
00154   repaint(d->transparent);
00155 }
00156 
00157 void KAnimWidget::drawContents( QPainter *p )
00158 {
00159   if ( d->pixmap.isNull() )
00160     return;
00161 
00162   int w = d->pixmap.width();
00163   int h = w;
00164   int x = (width()  - w) / 2;
00165   int y = (height() - h) / 2;
00166   p->drawPixmap(QPoint(x, y), d->pixmap, QRect(0, d->current_frame*h, w, h));
00167 }
00168 
00169 void KAnimWidget::updateIcons()
00170 {
00171   if (!d->initDone)
00172      return;
00173 
00174   if (parent()->inherits( "KToolBar" ))
00175     d->size = ((KToolBar*)parent())->iconSize();
00176   if (!d->size)
00177      d->size = KGlobal::iconLoader()->currentSize(KIcon::MainToolbar);
00178 
00179   QString path = KGlobal::iconLoader()->iconPath(d->icon_name, -d->size);
00180   QImage img(path);
00181   
00182   if (img.isNull())
00183      return;
00184 
00185   d->current_frame = 0;
00186   d->frames = img.height() / img.width();
00187   d->transparent = img.hasAlphaBuffer();
00188   if (d->pixmap.width() != d->size)
00189   {
00190      img = img.smoothScale(d->size, d->size*d->frames);     
00191   }
00192   d->pixmap = img;
00193 
00194   setFixedSize( d->size+2, d->size+2 );
00195   resize( d->size+2, d->size+2 );
00196 }
00197 
00198 void KAnimWidget::virtual_hook( int, void* )
00199 { /*BASE::virtual_hook( id, data );*/ }
00200 
00201 #include "kanimwidget.moc"
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