Mercurial > hg > svgui
view widgets/LevelPanWidget.h @ 1170:958e352919a5 3.0-integration
Avoid rounding error giving too few bins in column request
author | Chris Cannam |
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date | Wed, 23 Nov 2016 10:39:32 +0000 |
parents | 77110abca8a1 |
children | 916b62baf7ac |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. 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; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #ifndef LEVEL_PAN_WIDGET_H #define LEVEL_PAN_WIDGET_H #include <QWidget> /** * A simple widget for coarse level and pan control. */ class LevelPanWidget : public QWidget { Q_OBJECT public: LevelPanWidget(QWidget *parent = 0); ~LevelPanWidget(); /// Return level as a gain value in the range [0,1] float getLevel() const; /// Return pan as a value in the range [-1,1] float getPan() const; /// Find out whether the widget is editable bool isEditable() const; /// Discover whether the level range includes muting or not bool includesMute() const; /// Draw a suitably sized copy of the widget's contents to the given device void renderTo(QPaintDevice *, QRectF, bool asIfEditable) const; QSize sizeHint() const; public slots: /// Set level in the range [0,1] -- will be rounded void setLevel(float); /// Set pan in the range [-1,1] -- will be rounded void setPan(float); /// Specify whether the widget is editable or read-only (default editable) void setEditable(bool); /// Specify whether the level range should include muting or not void setIncludeMute(bool); signals: void levelChanged(float); void panChanged(float); protected: virtual void mousePressEvent(QMouseEvent *ev); virtual void mouseMoveEvent(QMouseEvent *ev); virtual void mouseReleaseEvent(QMouseEvent *ev); virtual void wheelEvent(QWheelEvent *ev); virtual void paintEvent(QPaintEvent *ev); void emitLevelChanged(); void emitPanChanged(); int m_level; int m_pan; bool m_editable; bool m_includeMute; QSizeF cellSize(QRectF) const; QPointF cellCentre(QRectF, int level, int pan) const; QSizeF cellLightSize(QRectF) const; QRectF cellLightRect(QRectF, int level, int pan) const; double thinLineWidth(QRectF) const; void toCell(QRectF, QPointF loc, int &level, int &pan) const; }; #endif