diff options
Diffstat (limited to 'arts/gui/kde/kfader_impl.cpp')
| -rw-r--r-- | arts/gui/kde/kfader_impl.cpp | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/arts/gui/kde/kfader_impl.cpp b/arts/gui/kde/kfader_impl.cpp new file mode 100644 index 00000000..3304f3d3 --- /dev/null +++ b/arts/gui/kde/kfader_impl.cpp @@ -0,0 +1,206 @@ + /* + + Copyright (C) 2000 Stefan Westerfeld + stefan@space.twc.de + 2001, 2002 Matthias Kretz + kretz@kde.org + + 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; either + version 2 of the License, or (at your option) any later version. + + 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 "kfader_impl.h" +#include "kfader_impl.moc" +#include "anyref.h" +#include "stdio.h" + +#include <math.h> + +using namespace Arts; +using namespace std; + +FaderIntMapper::FaderIntMapper(KFader_impl *impl, KFader *kp) :impl(impl) +{ + connect(kp, SIGNAL(valueChanged(int)), this, SLOT(valueChanged(int))); +} + +void FaderIntMapper::valueChanged(int pos) +{ + impl->valueChanged(pos); +} + +KFader_impl::KFader_impl( KFader * widget ) + : KWidget_impl( widget ? widget : new KFader( 0, 100, 1, 0 ) ) +{ + _min = 0; _max = 1; _value = 0; + _factor = 1; + _logarithmic = 0; + _range = 100; + + _kfader = static_cast<KFader*>( _qwidget ); + _kfader->setMinimumWidth( 40 ); + _kfader->setMinimumHeight( 100 ); + new FaderIntMapper( this, _kfader ); +} + +string KFader_impl::caption() +{ + return _caption.utf8().data(); +} + +void KFader_impl::caption(const string& newText) +{ + _caption = QString::fromUtf8(newText.c_str()); + _kfader->setName(_caption.utf8().data()); +} + +string KFader_impl::color() +{ + return _color; +} + +void KFader_impl::color(const string& newColor) +{ + _color = newColor; + if(strlen(_color.c_str())) + { + QColor qc(_color.c_str()); + _kfader->setColor(qc); + } +} + +float KFader_impl::min() +{ + return _min; +} + +void KFader_impl::min(float newMin) +{ + if(_min != newMin) + { + _min = newMin; + applyValue(); + } +} + +float KFader_impl::max() +{ + return _max; +} + +void KFader_impl::max(float newMax) +{ + if(_max != newMax) + { + _max = newMax; + applyValue(); + } +} + +float KFader_impl::value() +{ + //float ret = ( _max + _min - float(_kfader->value()) ) / _factor; + //if(_logarithmic > 0) + //ret = convertFromLog(ret); + float ret = _value; + if(ret < _min) + ret = _min; + else if(ret > _max) + ret = _max; + return ret; +} + +void KFader_impl::value(float newValue) +{ + if(newValue != _value) + { + _value = newValue; + applyValue(); + if(visible()) + value_changed(value()); + } +} + +long KFader_impl::range() +{ + return _range; +} + +void KFader_impl::range(long newRange) +{ + if(_range != newRange) + { + _range = newRange; + applyValue(); + } +} + +void KFader_impl::valueChanged(int newvalue) +{ + _value = float(newvalue) / _factor; + if(_logarithmic > 0) + _value = convertFromLog(_value); + _value = _max + _min - _value; + if(visible()) + value_changed(value()); +} + +float KFader_impl::convertToLog(float val) +{ + return log(val) / log(_logarithmic); +} + +float KFader_impl::convertFromLog(float val) +{ + return pow(_logarithmic, val); +} + +void KFader_impl::applyValue() +{ + double dmin = _min; + double dmax = _max; + double dvalue = _value; + if(_logarithmic > 0) + { + dmin = convertToLog(_min); + dmax = convertToLog(_max); + dvalue = convertToLog(_value); + } + _factor = _range / (dmax - dmin); + int imin = int(_factor * dmin); + int imax = int(_factor * dmax); + int ivalue = int(_factor * (dmax + dmin - dvalue)); + _kfader->setRange(imin, imax); + _kfader->setValue(ivalue); +} + +void KFader_impl::logarithmic(float newLogarithmic) +{ + if(_logarithmic != newLogarithmic) + { + _logarithmic = newLogarithmic; + applyValue(); + } +} + +float KFader_impl::logarithmic() +{ + return _logarithmic; +} + +REGISTER_IMPLEMENTATION(KFader_impl); + +// vim: sw=4 ts=4 |