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/*
Copyright ( C ) 2003 Arnold Krille <arnold@arnoldarts.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation;
version 2 of the License.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "kvolumefader_impl.h"
#include <kdebug.h>
#include <qpainter.h>
#include <qstyle.h>
#include <qfont.h>
#include <qfontmetrics.h>
#include <kglobalsettings.h>
#include <klocale.h>
#include <kpopupmenu.h>
#include <kaction.h>
#include <kinputdialog.h>
KVolumeFader_impl::KVolumeFader_impl( QFrame* w )
: Arts::KFrame_impl( w ? w : new KVolumeFader_Widget( 0 ) )
, dB2VolCalc( -36, 6 )
, _dir( Arts::BottomToTop )
, dbmin_inupdate( false )
, dbmax_inupdate( false )
, direction_inupdate( false )
, ignoreUpdates( 0 )
{
//kdDebug()<<"KVolumeFader_impl::KVolumeFader_impl( QFrame* w="<<w<<" )"<<endl;
_vfwidget = static_cast<KVolumeFader_Widget*>( _qwidget );
_vfwidget->setImpl( this );
}
KVolumeFader_impl::~KVolumeFader_impl() {
}
float KVolumeFader_impl::dbmin() { return dB2VolCalc::dbmin; }
void KVolumeFader_impl::dbmin( float n ) {
if ( n != dB2VolCalc::dbmin && !dbmin_inupdate ) {
dbmin_inupdate = true;
dB2VolCalc::dbmin = n;
dbmin_changed( dbmin() );
dbmin_inupdate = false;
}
}
float KVolumeFader_impl::dbmax() { return dB2VolCalc::dbmax; }
void KVolumeFader_impl::dbmax( float n ) {
if ( n != dB2VolCalc::dbmax && !dbmax_inupdate ) {
dbmax_inupdate = true;
dB2VolCalc::dbmax = n;
dbmax_changed( dbmax() );
dbmax_inupdate = false;
}
}
Arts::Direction KVolumeFader_impl::direction() { return _dir; }
void KVolumeFader_impl::direction( Arts::Direction n ) {
if ( n != _dir && !direction_inupdate ) {
direction_inupdate = true;
_dir = n;
_vfwidget->setDirection( _dir );
// direction_changed( direction() );
direction_inupdate = false;
}
}
float KVolumeFader_impl::volume() { return _volume; }
void KVolumeFader_impl::volume( float n ) {
//kdDebug() << k_funcinfo << n << " ignore: " << ignoreUpdates << endl;
if ( ignoreUpdates > 0 ) {
--ignoreUpdates;
return;
}
_volume = n;
_vfwidget->setValue( amptondb( _volume ) );
}
float KVolumeFader_impl::dbvolume() { return amptodb( _volume ); }
void KVolumeFader_impl::dbvolume( float n ) {
//kdDebug() << k_funcinfo << n << endl;
normalizedvolume( dbtondb( n ) );
}
void KVolumeFader_impl::normalizedvolume( float n ) {
if ( ( ndbtodb( n ) > dbmin() ) && ( ndbtodb( n ) < dbmax() ) ) {
float amp = ndbtoamp( n );
if ( amp != _volume ) {
++ignoreUpdates;
//kdDebug() << k_funcinfo << ignoreUpdates << endl;
_volume = amp;
_vfwidget->setValue( n );
volume_changed( _volume );
}
}
}
void KVolumeFader_impl::constructor( float dbmin, float dbmax, Arts::Direction dir ) {
this->dbmin( dbmin ); this->dbmax( dbmax ); direction( dir );
}
KVolumeFader_Widget::KVolumeFader_Widget( QWidget* p, const char* n )
: QFrame( p,n )
, _impl( 0 )
, _inupdate( false )
, _value( -1 )
, _dir( Arts::BottomToTop )
, _menu( new KPopupMenu( this ) )
, _aExactValue( new KAction( i18n( "Set Exact Value..." ), KShortcut(), this, SLOT( exactValue() ), this ) )
{
//kdDebug() << k_funcinfo << endl;
setMinimumSize( 10,10 );
_aExactValue->plug( _menu );
}
void KVolumeFader_Widget::setImpl( KVolumeFader_impl* n ) { _impl = n; update(); }
KVolumeFader_Widget::~KVolumeFader_Widget() {
//kdDebug() << k_funcinfo << endl;
}
void KVolumeFader_Widget::setDirection( Arts::Direction n ) { _dir = n; update(); }
void KVolumeFader_Widget::setValue( float n ) {
//kdDebug() << k_funcinfo << n << endl;
if ( n != _value ) {
_value = n;
update();
}
}
QColor KVolumeFader_Widget::interpolate( QColor low, QColor high, float percent ) {
if ( percent<=0 ) return low; else
if ( percent>=1 ) return high; else
return QColor(
int( low.red() + ( high.red()-low.red() ) * percent ),
int( low.green() + ( high.green()-low.green() ) * percent ),
int( low.blue() + ( high.blue()-low.blue() ) * percent ) );
}
void KVolumeFader_Widget::drawContents( QPainter* p ){
if ( _dir==Arts::BottomToTop || _dir==Arts::BottomToTop ) {
float h;
if ( _dir==Arts::BottomToTop ) h = contentsRect().height() * ( 1 - _value );
else h = contentsRect().height() * _value;
for ( int i=int( h ); i<contentsRect().height(); i++ ) {
p->setPen( interpolate( colorGroup().light(), colorGroup().highlight(), float( i )/contentsRect().height() ) );
p->drawLine( contentsRect().left(), this->frameWidth() + i, contentsRect().right(), this->frameWidth() + i );
}
p->setPen( colorGroup().dark() );
p->drawLine( contentsRect().left(), this->frameWidth() + int( h ), contentsRect().right(), this->frameWidth() + int( h ) );
} else {
float w;
p->translate( this->width(),0 );
if ( _dir==Arts::LeftToRight ) w = - contentsRect().width() * ( 1 - _value );
else w = - contentsRect().width() * _value;
for ( int i=int( w ); i>=-contentsRect().width(); i-- ) {
p->setPen( interpolate( colorGroup().light(), colorGroup().highlight(), float( -i )/contentsRect().width() ) );
p->drawLine( this->frameWidth() + i, contentsRect().top(), this->frameWidth() + i, contentsRect().bottom() );
}
p->setPen( colorGroup().dark() );
p->drawLine( this->frameWidth() + int( w ), contentsRect().top(), this->frameWidth() + int( w ), contentsRect().bottom() );
}
}
void KVolumeFader_Widget::mousePressEvent( QMouseEvent* ){
//kdDebug() << k_funcinfo << endl;
}
void KVolumeFader_Widget::mouseReleaseEvent( QMouseEvent* qme ){
bool setValue = false;
if ( KGlobalSettings::mouseSettings().handed == 0 && qme->button() == Qt::LeftButton ) setValue=true;
if ( KGlobalSettings::mouseSettings().handed == 1 && qme->button() == Qt::RightButton ) setValue=true;
if ( setValue )
{
switch ( _dir ) {
default:
case Arts::BottomToTop:
if ( _impl ) _impl->normalizedvolume( 1 - float( qme->y() ) / contentsRect().height() );
break;
case Arts::TopToBottom:
if ( _impl ) _impl->normalizedvolume( float( qme->y() ) / contentsRect().height() );
break;
case Arts::LeftToRight:
if ( _impl ) _impl->normalizedvolume( float( qme->x() ) / contentsRect().width() );
break;
case Arts::RightToLeft:
if ( _impl ) _impl->normalizedvolume( 1 - float( qme->x() ) / contentsRect().width() );
break;
}
} else _menu->exec( qme->globalPos() );
}
void KVolumeFader_Widget::mouseMoveEvent( QMouseEvent* qme ){
switch ( _dir ) {
default:
case Arts::BottomToTop:
if ( _impl ) _impl->normalizedvolume( 1 - float( qme->y() ) / contentsRect().height() );
break;
case Arts::TopToBottom:
if ( _impl ) _impl->normalizedvolume( float( qme->y() ) / contentsRect().height() );
break;
case Arts::LeftToRight:
if ( _impl ) _impl->normalizedvolume( float( qme->x() ) / contentsRect().width() );
break;
case Arts::RightToLeft:
if ( _impl ) _impl->normalizedvolume( 1 - float( qme->x() ) / contentsRect().width() );
break;
}
}
void KVolumeFader_Widget::wheelEvent( QWheelEvent* qwe ){
//kdDebug() << k_funcinfo << endl;
if ( qwe->delta() < 0 ) { if ( _impl ) _impl->normalizedvolume( _impl->dbtondb( _impl->dbvolume() - 1 ) ); }
if ( qwe->delta() > 0 ) { if ( _impl ) _impl->normalizedvolume( _impl->dbtondb( _impl->dbvolume() + 1 ) ); }
}
void KVolumeFader_Widget::exactValue() {
//kdDebug() << k_funcinfo << endl;
bool ok=false;
double n = KInputDialog::getDouble( i18n( "Set Exact Volume Value" ), i18n( "Exact volume (dB):" ), _impl->dbvolume(), _impl->dbmin(), _impl->dbmax(), 1, &ok, this );
if ( ok ) _impl->dbvolume( n );
}
REGISTER_IMPLEMENTATION( KVolumeFader_impl );
#include "kvolumefader_impl.moc"
// vim: sw=4 ts=4
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