Mercurial > hg > svgui
view widgets/LevelPanWidget.h @ 1228:dc6457ac4d07
Add method to scale pen widths for hi-res screens
author | Chris Cannam |
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date | Thu, 26 Jan 2017 21:17:19 +0000 |
parents | a68c25ba1153 |
children | 8ef67917c301 |
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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. The basic level range is [0,1] but the /// gain scale may go up to 4.0 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. The basic level range is [0,1] but the scale may go /// higher. The value will be rounded. void setLevel(float); /// Set pan in the range [-1,1]. The value will be rounded void setPan(float); /// Set left and right peak monitoring levels in the range [0,1] void setMonitoringLevels(float, 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); // public so it can be called from LevelPanToolButton (ew) virtual void wheelEvent(QWheelEvent *ev); signals: void levelChanged(float); // range [0,1] void panChanged(float); // range [-1,1] void mouseEntered(); void mouseLeft(); protected: virtual void mousePressEvent(QMouseEvent *ev); virtual void mouseMoveEvent(QMouseEvent *ev); virtual void mouseReleaseEvent(QMouseEvent *ev); virtual void paintEvent(QPaintEvent *ev); virtual void enterEvent(QEvent *); virtual void leaveEvent(QEvent *); void emitLevelChanged(); void emitPanChanged(); int m_level; int m_pan; float m_monitorLeft; float m_monitorRight; bool m_editable; bool m_includeMute; static int audioLevelToLevel(float audioLevel, bool withMute); static float levelToAudioLevel(int level, bool withMute); static int audioPanToPan(float audioPan); static float panToAudioPan(int pan); 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