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knob.h

/* abGate - LV2 Noise Gate Plugin
 *
 * Copyright 2011 Antanas Bru┼żas
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef _KNOB_H
#define _KNOB_H

#include "plugin_configuration.h"

#include <gtkmm/adjustment.h>
#include <gtkmm/misc.h>

using namespace Gtk;

00030 class knob : public Misc
{
public:
      knob(const sigc::slot<void> knob_slot, double default_value, double min, double max, double step);
      ~knob();

      void set_picture_size(int x, int y);

      void connecting(Adjustment*, const sigc::slot<void> slot);
      void value_changed();

      float get_knob_value();
      void set_knob_value(float value);

      // Dispacher used to update GUI from the main (GUI) thread
      Glib::Dispatcher sig_done;

      int new_frame;

protected:
      virtual bool on_expose_event        (GdkEventExpose*);
      virtual bool on_button_press_event  (GdkEventButton*);
      virtual bool on_button_release_event      (GdkEventButton*);
      virtual bool on_motion_notify_event (GdkEventMotion*);

private:
      void mouse_pos_change(gint x, gint y);
      Glib::RefPtr<Gdk::Pixbuf> pixbuf;
      Glib::RefPtr<Gdk::Drawable> m_drawable;
      Adjustment *a_knb;
      gint current_frame, all_frames, width, height, center_x, center_y, widget_x, widget_y;

};

#endif

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