mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-05 00:11:16 -05:00
57 lines
2.2 KiB
C++
57 lines
2.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2023 Jon Beniston, M7RCE //
|
|
// //
|
|
// This program 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 as version 3 of the License, or //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// 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 V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <QFontMetrics>
|
|
#include <QPainter>
|
|
#include <QDebug>
|
|
|
|
#include <cmath>
|
|
|
|
|
|
#include "logslider.h"
|
|
|
|
LogSlider::LogSlider(QWidget *parent) :
|
|
QSlider(Qt::Horizontal, parent)
|
|
{
|
|
setRange(0, 1000);
|
|
connect(this, &QSlider::valueChanged, this, &LogSlider::handleValueChanged);
|
|
setPageStep(1);
|
|
setTickPosition(QSlider::TicksAbove);
|
|
setTickInterval(m_stepsPerPower);
|
|
}
|
|
|
|
void LogSlider::setRange(double min, double max)
|
|
{
|
|
m_start = floor(log10(min));
|
|
m_stop = ceil(log10(max));
|
|
m_steps = m_stop - m_start;
|
|
setMinimum(0);
|
|
setMaximum(m_steps * m_stepsPerPower);
|
|
}
|
|
|
|
void LogSlider::handleValueChanged(int value)
|
|
{
|
|
double v = pow(10.0, value/(double)m_stepsPerPower + m_start);
|
|
emit logValueChanged(v);
|
|
}
|
|
|
|
void LogSlider::setValue(double value)
|
|
{
|
|
int v = (int)((log10(value) - m_start) * 100);
|
|
QSlider::setValue(v);
|
|
}
|