1 /***************************************************************************
2  *   Copyright (C) 2011 by Pere Rafols Soler                               *
3  *   sapista2@gmail.com                                                    *
4  *                                                                         *
5  *   This program is free software; you can redistribute it and/or modify  *
6  *   it under the terms of the GNU General Public License as published by  *
7  *   the Free Software Foundation; either version 2 of the License, or     *
8  *   (at your option) any later version.                                   *
9  *                                                                         *
10  *   This program is distributed in the hope that it will be useful,       *
11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
13  *   GNU General Public License for more details.                          *
14  *                                                                         *
15  *   You should have received a copy of the GNU General Public License     *
16  *   along with this program; if not, write to the                         *
17  *   Free Software Foundation, Inc.,                                       *
18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
19  ***************************************************************************/
20 
21 #ifndef KNOB_WIDGET2_H
22 #define KNOB_WIDGET2_H
23 
24 #include <cmath>
25 #include <string>
26 #include <vector>
27 #include <gtkmm/drawingarea.h>
28 #include <gdkmm/pixbuf.h>
29 #include <glibmm/refptr.h>
30 #include <cairomm/surface.h>
31 
32 #define KNOB_TYPE_LIN 0
33 #define KNOB_TYPE_FREQ 1
34 #define KNOB_TYPE_TIME 2
35 
36 class KnobWidget2 : public Gtk::DrawingArea
37 {
38   public:
39   KnobWidget2(float fMin, float fMax, std::string sLabel, std::string sUnits, const char *knobIconPath, int iType = KNOB_TYPE_LIN, bool snap2ZerodB = false);
40   ~KnobWidget2();
41   void set_value(float fValue);
42   double get_value();
43 
44   //signal accessor:
45   typedef sigc::signal<void> signal_KnobChanged;
46   signal_KnobChanged signal_changed();
47 
48 
49   protected:
50     //Override default signal handler:
51     virtual bool on_expose_event(GdkEventExpose* event);
52     virtual bool on_mouse_leave_widget(GdkEventCrossing* event);
53     void redraw();
54 
55     //Mouse grab signal handlers
56     virtual bool on_button_press_event(GdkEventButton* event);
57     virtual bool on_button_release_event(GdkEventButton* event);
58     virtual bool on_scrollwheel_event(GdkEventScroll* event);
59     virtual bool on_mouse_motion_event(GdkEventMotion* event);
60 
61     float m_fMin; //Min representable value
62     float m_fMax; //Max representable value
63     bool bMotionIsConnected;
64     float m_Value;
65     std::string m_Label;
66     std::string m_Units;
67     int m_TypeKnob;
68 
69     int width;
70     int height;
71     int mouse_move_ant;
72     bool m_snap2Zero;
73     bool m_focus;
74     double m_slowMultiplier;
75 
76     //Fader change signal
77     signal_KnobChanged m_KnobChangedSignal;
78 
79   private:
80     std::string m_knobIconPath;
81     Cairo::RefPtr<Cairo::ImageSurface> m_image_surface_ptr;
82     Glib::RefPtr<Gdk::Pixbuf> m_image_ptr;
83     Cairo::RefPtr< Cairo::Context> m_image_context_ptr;
84 };
85 #endif