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//=============================================================================
// Awl
// Audio Widget Library
// $Id:$
//
// Copyright (C) 2002-2006 by Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "fastlog.h"
#include "aslider.h"
#include <QKeyEvent>
#include <QWheelEvent>
namespace Awl {
//---------------------------------------------------------
// AbstractSlider
//---------------------------------------------------------
AbstractSlider::AbstractSlider(QWidget* parent)
: QWidget(parent), _scaleColor(Qt::black), _scaleValueColor(Qt::blue)
{
_id = 0;
_value = 0.5;
_minValue = 0.0;
_maxValue = 1.0;
_lineStep = 0.1;
_pageStep = 0.2;
_center = false;
_invert = false;
_scaleWidth = 4;
_log = false;
_integer = false;
}
//---------------------------------------------------------
// setEnabled
//---------------------------------------------------------
void AbstractSlider::setEnabled(bool val)
{
QWidget::setEnabled(val);
update();
}
//---------------------------------------------------------
// setCenter
//! If the center flag is set, a notch is drawn to
//! show the center position.
//---------------------------------------------------------
void AbstractSlider::setCenter(bool val)
{
if (val != _center) {
_center = val;
update();
}
}
//!--------------------------------------------------------
// setScaleWidth
//---------------------------------------------------------
void AbstractSlider::setScaleWidth(int val)
{
if (val != _scaleWidth) {
_scaleWidth = val;
update();
}
}
//---------------------------------------------------------
// setScaleColor
//---------------------------------------------------------
void AbstractSlider::setScaleColor(const QColor& c)
{
if (c != _scaleColor) {
_scaleColor = c;
update();
}
}
//---------------------------------------------------------
// setScaleValueColor
//---------------------------------------------------------
void AbstractSlider::setScaleValueColor(const QColor& c)
{
if (c != _scaleValueColor) {
_scaleValueColor = c;
update();
}
}
//---------------------------------------------------------
// wheelEvent
//---------------------------------------------------------
void AbstractSlider::wheelEvent(QWheelEvent* ev)
{
double div = 120.0;
if (ev->modifiers() & Qt::ShiftModifier)
_value += (ev->delta() * pageStep()) / div;
else
_value += (ev->delta() * lineStep()) / div;
if (_value < _minValue)
_value = _minValue;
else if (_value > _maxValue)
_value = _maxValue;
valueChange();
update();
}
//---------------------------------------------------------
// keyPressEvent
//---------------------------------------------------------
void AbstractSlider::keyPressEvent(QKeyEvent* ev)
{
double oval = _value;
switch (ev->key()) {
case Qt::Key_Home: _value = _minValue; break;
case Qt::Key_End: _value = _maxValue; break;
case Qt::Key_Up:
case Qt::Key_Left: _value += lineStep(); break;
case Qt::Key_Down:
case Qt::Key_Right: _value -= lineStep(); break;
case Qt::Key_PageDown: _value -= pageStep(); break;
case Qt::Key_PageUp: _value += pageStep(); break;
default:
break;
}
if (_value < _minValue)
_value = _minValue;
else if (_value > _maxValue)
_value = _maxValue;
if (oval != _value) {
if (_integer && (rint(oval) == rint(_value)))
return;
valueChange();
update();
}
}
//---------------------------------------------------------
// setValue
//---------------------------------------------------------
void AbstractSlider::setValue(double val)
{
if (_log) {
if (val == 0.0f)
_value = _minValue;
else {
_value = fast_log10(val) * 20.0f;
if (_value < _minValue)
_value = _minValue;
}
}
else if (_integer)
_value = rint(val);
else
_value = val;
update();
}
//---------------------------------------------------------
// valueChange
//---------------------------------------------------------
void AbstractSlider::valueChange()
{
emit valueChanged(value(), _id);
}
//---------------------------------------------------------
// value
//---------------------------------------------------------
double AbstractSlider::value() const
{
if (_log)
return pow(10.0, _value*0.05f);
if (_integer)
return rint(_value);
return _value;
}
//---------------------------------------------------------
// minLogValue
//---------------------------------------------------------
//double AbstractSlider::minValue() const {
// return _log ? pow(10.0, _minValue*0.05f) : _minValue;
//}
//---------------------------------------------------------
// setMinLogValue
//---------------------------------------------------------
void AbstractSlider::setMinLogValue(double val) {
if (_log) {
if (val == 0.0f) _minValue = -100;
else _minValue = fast_log10(val) * 20.0f;
}
else _minValue = val;
}
//---------------------------------------------------------
// maxLogValue
//---------------------------------------------------------
//double AbstractSlider::maxValue() const {
// return _log ? pow(10.0, _maxValue*0.05f) : _maxValue;
//}
//---------------------------------------------------------
// setMaxLogValue
//---------------------------------------------------------
void AbstractSlider::setMaxLogValue(double val) {
if (_log) {
_maxValue = fast_log10(val) * 20.0f;
}
else _maxValue = val;
}
}
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