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sdrangel/sdrgui/gui/loglabelslider.cpp
2023-08-05 12:52:42 +01:00

73 lines
2.5 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 <QDebug>
#include <cmath>
#include "loglabelslider.h"
LogLabelSlider::LogLabelSlider(QWidget *parent) :
QWidget(parent)
{
m_vLayout = new QVBoxLayout(this);
m_hLayout = new QHBoxLayout();
m_slider = new LogSlider();
connect(m_slider, &LogSlider::logValueChanged, this, &LogLabelSlider::handleLogValueChanged);
m_vLayout->addLayout(m_hLayout);
m_vLayout->addWidget(m_slider);
}
void LogLabelSlider::setRange(double min, double max)
{
m_slider->setRange(min, max);
double start = floor(log10(min));
double stop = ceil(log10(max));
double steps = stop - start;
qDeleteAll(m_labels);
m_labels.clear();
double v = pow(10.0, start);
for (int i = 0; i <= steps; i++)
{
QString t = QString("%1").arg(v);
QLabel *label = new QLabel(t);
if (i == 0) {
label->setAlignment(Qt::AlignLeft);
} else if (i == steps) {
label->setAlignment(Qt::AlignRight);
} else {
label->setAlignment(Qt::AlignCenter);
}
m_labels.append(label);
m_hLayout->addWidget(label);
v *= 10.0;
}
}
void LogLabelSlider::handleLogValueChanged(double value)
{
emit logValueChanged(value);
}