comparison widgets/Thumbwheel.h @ 132:5d3a483856ff

* Add Thumbwheel widget for all our zooming needs
* Use QSettings to save/restore window size and position -- precursor to
  switching our preferences to QSettings as well -- wish I'd noticed it sooner
* Only suspend writes (not reads from the underlying cache objects) from the
  fft caches when repainting the spectrogram -- performance should now be
  significantly better

+/* -*- 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 file copyright 2006 Chris Cannam.
+    
+    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 _THUMBWHEEL_H_
+#define _THUMBWHEEL_H_
+
+#include <QWidget>
+
+class Thumbwheel : public QWidget
+{
+    Q_OBJECT
+
+public:
+    Thumbwheel(int min, int max, int defaultValue,
+               Qt::Orientation orientation, QWidget *parent = 0);
+    virtual ~Thumbwheel();
+
+    void setSpeed(float speed);
+    float getSpeed() const;
+
+    void setTracking(bool tracking);
+    bool getTracking() const;
+
+    void setShowScale(bool show);
+    bool getShowScale() const;
+
+    void setValue(int value);
+    int getValue() const;
+
+    virtual void mousePressEvent(QMouseEvent *e);
+    virtual void mouseDoubleClickEvent(QMouseEvent *e);
+    virtual void mouseMoveEvent(QMouseEvent *e);
+    virtual void mouseReleaseEvent(QMouseEvent *e);
+    virtual void wheelEvent(QWheelEvent *e);
+    virtual void paintEvent(QPaintEvent *e);
+
+    QSize sizeHint() const;
+
+signals:
+    void valueChanged(int);
+
+private:
+    int m_min;
+    int m_max;
+    int m_default;
+    int m_value;
+    Qt::Orientation m_orientation;
+    float m_speed;
+    bool m_tracking;
+    bool m_showScale;
+    bool m_clicked;
+    QPoint m_clickPos;
+    int m_clickValue;
+};
+
+#endif