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Diffstat (limited to 'src/gui/widgets/Rotary.h')
| -rw-r--r-- | src/gui/widgets/Rotary.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/gui/widgets/Rotary.h b/src/gui/widgets/Rotary.h new file mode 100644 index 0000000..2efacf9 --- /dev/null +++ b/src/gui/widgets/Rotary.h @@ -0,0 +1,167 @@ + +/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ + +/* + Rosegarden + A MIDI and audio sequencer and musical notation editor. + + This program is Copyright 2000-2008 + Guillaume Laurent <[email protected]>, + Chris Cannam <[email protected]>, + Richard Bown <[email protected]> + + The moral rights of Guillaume Laurent, Chris Cannam, and Richard + Bown to claim authorship of this work have been asserted. + + Other copyrights also apply to some parts of this work. Please + see the AUTHORS file and individual file headers for details. + + 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 _RG_ROSEGARDENROTARY_H_ +#define _RG_ROSEGARDENROTARY_H_ + +#include <map> +#include <qcolor.h> +#include <qwidget.h> + + +class QWheelEvent; +class QPaintEvent; +class QPainter; +class QMouseEvent; + + +namespace Rosegarden +{ + + + +class Rotary : public QWidget +{ + Q_OBJECT +public: + + enum TickMode { + NoTicks, // plain circle with no marks for end points etc + LimitTicks, // marks at end points but not any intermediate points + IntervalTicks, // end points plus quarter, half, three-quarters + PageStepTicks, // end points plus every page-step interval + StepTicks // end points plus every step interval + }; + + Rotary(QWidget *parent, + float minValue = 0.0, + float maxValue = 100.0, + float step = 1.0, + float pageStep = 10.0, + float initialPosition = 50.0, + int size = 20, + TickMode ticks = NoTicks, + bool snapToTicks = false, + bool centred = false, + bool logarithmic = false); // extents are logs, exp for display + ~Rotary(); + + void setMinValue(float min) { m_minValue = min; } + float getMinValue() const { return m_minValue; } + + void setMaxValue(float max) { m_maxValue = max; } + float getMaxValue() const { return m_maxValue; } + + void setStep(float step) { m_step = step; } + float getStep() const { return m_step; } + + void setPageStep(float step) { m_pageStep = step; } + float getPageStep() const { return m_pageStep; } + + int getSize() const { return m_size; } + + // Position + // + float getPosition() const { return m_position; } + void setPosition(float position); + + // Set the colour of the knob + // + void setKnobColour(const QColor &colour); + QColor getKnobColour() const { return m_knobColour; } + +signals: + void valueChanged(float); + +protected slots: + void slotFloatTimeout(); + +protected: + virtual void paintEvent(QPaintEvent *e); + virtual void mousePressEvent(QMouseEvent *e); + virtual void mouseReleaseEvent(QMouseEvent *e); + virtual void mouseMoveEvent(QMouseEvent *e); + virtual void mouseDoubleClickEvent(QMouseEvent *e); + virtual void wheelEvent(QWheelEvent *e); + + void snapPosition(); + void drawPosition(); + void drawTick(QPainter &paint, double angle, int size, bool internal); + + float m_minValue; + float m_maxValue; + float m_step; + float m_pageStep; + int m_size; + TickMode m_tickMode; + bool m_snapToTicks; + bool m_centred; + bool m_logarithmic; + + float m_position; + float m_snapPosition; + float m_initialPosition; + bool m_buttonPressed; + int m_lastY; + int m_lastX; + + QColor m_knobColour; + + struct CacheIndex { + + CacheIndex(int _s, int _c, int _a, int _n, int _ct) : + size(_s), colour(_c), angle(_a), numTicks(_n), centred(_ct) { } + + bool operator<(const CacheIndex &i) const { + // woo! + if (size < i.size) return true; + else if (size > i.size) return false; + else if (colour < i.colour) return true; + else if (colour > i.colour) return false; + else if (angle < i.angle) return true; + else if (angle > i.angle) return false; + else if (numTicks < i.numTicks) return true; + else if (numTicks > i.numTicks) return false; + else if (centred == i.centred) return false; + else if (!centred) return true; + return false; + } + + int size; + unsigned int colour; + int angle; + int numTicks; + bool centred; + }; + + typedef std::map<CacheIndex, QPixmap> PixmapCache; + static PixmapCache m_pixmaps; +}; + + + +} + +#endif |