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042f8ac325
Add peak indicators to the mixer strips. They show the maximum peak value that was observed and can be reset by clicking on them. ## Implementation details The implementation works via a signal/slot mechanism. The `Fader` class has a new signal `peakChanged` which reports peak values as amplifications. A new class `PeakIndicator` is added which has a slot `updatePeak` which is connected to the new signal in `Fader`. The `PeakIndicator` inherits from `QLabel` and mainly deals with updating the label text from the current peak value. Add a `PeakIndicator` instance to `MixerChannelView`. Add a `reset` method to `MixerChannelView` so that the mixer channel can be reset on the loading of new projects, etc. The current implementation resets the peak indicator back to -inf dbFS. The `reset` method is called in `MixerView::clear`. Remove the clamping in `Fader::setPeak` so that all peaks are reported. Emit the new signal if the peak changes.
61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
/*
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* PeakIndicator.h - Peak indicator widget
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*
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* Copyright (c) 2024- Michael Gregorius
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef LMMS_GUI_PEAKINDICATOR_H
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#define LMMS_GUI_PEAKINDICATOR_H
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#include "lmms_export.h"
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#include <QLabel>
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namespace lmms::gui
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{
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class LMMS_EXPORT PeakIndicator : public QLabel
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{
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Q_OBJECT
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public:
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PeakIndicator(QWidget* parent);
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void resetPeakToMinusInf();
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public slots:
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void updatePeak(float peak);
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protected:
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void mousePressEvent(QMouseEvent* e) override;
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private:
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void updatePeakDisplay();
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private:
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float m_peak;
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} ;
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} // namespace lmms::gui
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#endif // LMMS_GUI_PEAKINDICATOR_H
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