2 Copyright (C) 2003 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __gtkmm2ext_fastmeter_h__
21 #define __gtkmm2ext_fastmeter_h__
24 #include <boost/tuple/tuple.hpp>
25 #include <boost/tuple/tuple_comparison.hpp>
26 #include <cairomm/pattern.h>
27 #include <gtkmm/drawingarea.h>
28 #include <gdkmm/pixbuf.h>
32 class FastMeter : public Gtk::DrawingArea {
39 FastMeter (long hold_cnt, unsigned long width, Orientation, int len=0, int clrb0=0x00ff00, int clr1=0xffff00, int clr2=0xffaa00, int clr3=0xff0000);
40 virtual ~FastMeter ();
42 void set (float level);
45 float get_level() { return current_level; }
46 float get_user_level() { return current_user_level; }
47 float get_peak() { return current_peak; }
49 long hold_count() { return hold_cnt; }
50 void set_hold_count (long);
53 bool on_expose_event (GdkEventExpose*);
54 void on_size_request (GtkRequisition*);
55 void on_size_allocate (Gtk::Allocation&);
59 Cairo::RefPtr<Cairo::Pattern> pattern;
62 int _clr0, _clr1, _clr2, _clr3;
64 Orientation orientation;
66 GdkRectangle last_peak_rect;
69 unsigned long hold_cnt;
70 unsigned long hold_state;
73 float current_user_level;
75 bool vertical_expose (GdkEventExpose*);
76 bool horizontal_expose (GdkEventExpose*);
77 void queue_vertical_redraw (const Glib::RefPtr<Gdk::Window>&, float);
78 void queue_horizontal_redraw (const Glib::RefPtr<Gdk::Window>&, float);
80 static Cairo::RefPtr<Cairo::Pattern> generate_meter_pattern (
81 int w, int h, int clr0, int clr1, int clr2, int clr3);
82 static Cairo::RefPtr<Cairo::Pattern> request_vertical_meter (
83 int w, int h, int clr0, int clr1, int clr2, int clr3);
84 static Cairo::RefPtr<Cairo::Pattern> request_horizontal_meter (
85 int w, int h, int clr0, int clr1, int clr2, int clr3);
87 struct PatternMapKey {
88 PatternMapKey (int w, int h, int c0, int c1, int c2, int c3)
90 , cols(c0, c1, c2, c3)
92 inline bool operator<(const PatternMapKey& rhs) const {
93 return (dim < rhs.dim) || (dim == rhs.dim && cols < rhs.cols);
95 boost::tuple<int, int> dim; // width, height
96 boost::tuple<int, int, int, int> cols; // c0, c1, c2, c3
98 typedef std::map<PatternMapKey, Cairo::RefPtr<Cairo::Pattern> > PatternMap;
100 static PatternMap v_pattern_cache;
101 static PatternMap h_pattern_cache;
102 static int min_pattern_metric_size; // min dimension for axis that displays the meter level
103 static int max_pattern_metric_size; // max dimension for axis that displays the meter level
109 #endif /* __gtkmm2ext_fastmeter_h__ */