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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* zoomslider.cc
*
* Fri May 2 21:23:26 CEST 2014
* Copyright 2014 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 DrumGizmo; if not, write to the 45Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "zoomslider.h"
#include <QPainter>
ZoomSlider::ZoomSlider(Qt::Orientation orientation)
: QSlider(orientation)
{
inverted = false;
from = 0;
to = 1;
tick_width = 0.1;
connect(this, SIGNAL(valueChanged(int)), this, SLOT(sliderValueChanged(int)));
}
void ZoomSlider::paintEvent(QPaintEvent *ev)
{
/*
QPainter p(this);
p.drawLine(0, 0, width(), height());
*/
QSlider::paintEvent(ev);
}
void ZoomSlider::setRange(float from, float to)
{
this->inverted = false;
this->from = from;
this->to = to;
int i_from = from / tick_width;
int i_to = to / tick_width;
if(i_from > i_to) {
this->inverted = true;
int tmp;
tmp = i_from;
i_from = i_to;
i_to = tmp;
}
QSlider::setRange(i_from, i_to);
}
float ZoomSlider::fromSlider(int value)
{
float val = (float)value * tick_width;
if(inverted) {
val *= -1;
val = val - to + from;
if(value == QSlider::minimum()) val = from;
if(value == QSlider::maximum()) val = to;
} else {
if(value == QSlider::minimum()) val = from;
if(value == QSlider::maximum()) val = to;
}
return val;
}
void ZoomSlider::sliderValueChanged(int value)
{
emit valueChanged(fromSlider(value));
}
void ZoomSlider::setTickWidth(float tick_width)
{
this->tick_width = tick_width;
setRange(from, to); // Update slider value span.
}
void ZoomSlider::setValue(float value)
{
int i_value = value * tick_width;
if(inverted) {
i_value *= -1;
i_value += from;
}
QSlider::setValue(i_value);
}
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