From e2de64d6f1beb9e492daf5b886e19933c1fa41dd Mon Sep 17 00:00:00 2001
From: toma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>
Date: Wed, 25 Nov 2009 17:56:58 +0000
Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
 BUG:215923

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
---
 arts/gui/kde/kfader_impl.cpp | 206 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 206 insertions(+)
 create mode 100644 arts/gui/kde/kfader_impl.cpp

(limited to 'arts/gui/kde/kfader_impl.cpp')

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
-- 
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