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76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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// Copyright (C) 2021, 2023 Jon Beniston, M7RCE <jon@beniston.com> //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <QDebug>
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#include <cmath>
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#include "loglabelslider.h"
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LogLabelSlider::LogLabelSlider(QWidget *parent) :
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QWidget(parent)
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{
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m_vLayout = new QVBoxLayout(this);
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m_hLayout = new QHBoxLayout();
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m_slider = new LogSlider();
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connect(m_slider, &LogSlider::logValueChanged, this, &LogLabelSlider::handleLogValueChanged);
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m_vLayout->addLayout(m_hLayout);
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m_vLayout->addWidget(m_slider);
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}
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void LogLabelSlider::setRange(double min, double max)
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{
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m_slider->setRange(min, max);
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double start = floor(log10(min));
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double stop = ceil(log10(max));
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double steps = stop - start;
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qDeleteAll(m_labels);
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m_labels.clear();
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double v = pow(10.0, start);
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for (int i = 0; i <= steps; i++)
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{
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QString t = QString("%1").arg(v);
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QLabel *label = new QLabel(t);
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if (i == 0) {
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label->setAlignment(Qt::AlignLeft);
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} else if (i == steps) {
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label->setAlignment(Qt::AlignRight);
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} else {
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label->setAlignment(Qt::AlignCenter);
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}
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m_labels.append(label);
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m_hLayout->addWidget(label);
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v *= 10.0;
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}
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}
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void LogLabelSlider::handleLogValueChanged(double value)
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{
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emit logValueChanged(value);
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}
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