src/calf/ctl_linegraph.h

   1 /* Calf DSP Library
   2  * A few useful widgets - a line graph, a knob, a tube - Panama!
   3  *
   4  * Copyright (C) 2008-2010 Krzysztof Foltman, Torben Hohn, Markus
   5  * Schmidt and others
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General
  18  * Public License along with this program; if not, write to the
  19  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 #ifndef _USE_MATH_DEFINES
  24 #define _USE_MATH_DEFINES
  25 #endif
  26 #ifndef __CALF_CTL_LINEGRAPH
  27 #define __CALF_CTL_LINEGRAPH
  28
  29 #include <gtk/gtk.h>
  30 #include <calf/giface.h>
  31 #include <calf/gui.h>
  32
  33 G_BEGIN_DECLS
  34
  35 #define CALF_TYPE_LINE_GRAPH           (calf_line_graph_get_type())
  36 #define CALF_LINE_GRAPH(obj)           (G_TYPE_CHECK_INSTANCE_CAST ((obj), CALF_TYPE_LINE_GRAPH, CalfLineGraph))
  37 #define CALF_IS_LINE_GRAPH(obj)        (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CALF_TYPE_LINE_GRAPH))
  38 #define CALF_LINE_GRAPH_CLASS(klass)   (G_TYPE_CHECK_CLASS_CAST ((klass),  CALF_TYPE_LINE_GRAPH, CalfLineGraphClass))
  39 #define CALF_IS_LINE_GRAPH_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE ((klass),  CALF_TYPE_LINE_GRAPH))
  40 #define CALF_LINE_GRAPH_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),  CALF_TYPE_LINE_GRAPH, CalfLineGraphClass))
  41
  42 struct FreqHandle
  43 {
  44     bool active;
  45     int dimensions;
  46     int style;
  47     char *label;
  48
  49     int param_active_no;
  50     int param_x_no;
  51     int param_y_no;
  52     int param_z_no;
  53     double value_x;
  54     double value_y;
  55     double value_z;
  56     double last_value_x;
  57     double last_value_y;
  58     double last_value_z;
  59     double default_value_x;
  60     double default_value_y;
  61     double default_value_z;
  62     double pos_x;
  63     double pos_y;
  64     double pos_z;
  65
  66     float left_bound;
  67     float right_bound;
  68     gpointer data;
  69
  70     inline bool is_active() { return (param_active_no < 0 || active); }
  71 };
  72
  73 #define FREQ_HANDLES 32
  74 #define HANDLE_WIDTH 20.0
  75
  76 struct CalfLineGraph
  77 {
  78     static const int debug = 0; // 0 - 3
  79
  80     GtkDrawingArea parent;
  81     const calf_plugins::line_graph_iface *source;
  82     int source_id;
  83     bool force_cache;
  84     bool force_redraw;
  85     int recreate_surfaces;
  86     bool is_square;
  87     float fade;
  88     int mode, movesurf;
  89     int generation;
  90     unsigned int layers;
  91     static const int pad_x = 0, pad_y = 0;
  92     int size_x, size_y;
  93     float zoom, offset;
  94     int param_zoom, param_offset;
  95
  96     cairo_surface_t *background_surface;
  97     cairo_surface_t *grid_surface;
  98     cairo_surface_t *cache_surface;
  99     cairo_surface_t *moving_surface[2];
 100     cairo_surface_t *handles_surface;
 101     cairo_surface_t *realtime_surface;
 102
 103     // crosshairs and FreqHandles
 104     gdouble mouse_x, mouse_y;
 105     bool use_crosshairs;
 106     bool crosshairs_active;
 107
 108     int freqhandles;
 109     bool use_freqhandles_buttons;
 110     bool enforce_handle_order;
 111     float min_handle_distance;
 112     int handle_grabbed;
 113     int handle_hovered;
 114     int handle_redraw;
 115     FreqHandle freq_handles[FREQ_HANDLES];
 116     /// Cached hand (drag) cursor
 117     GdkCursor *hand_cursor;
 118     /// Cached arrow (drag) cursor
 119     GdkCursor *arrow_cursor;
 120 };
 121
 122 struct CalfLineGraphClass
 123 {
 124     GtkDrawingAreaClass parent_class;
 125 };
 126
 127 extern GtkWidget *calf_line_graph_new();
 128
 129 extern GType calf_line_graph_get_type();
 130
 131 extern void calf_line_graph_set_square(CalfLineGraph *graph, bool is_square);
 132
 133 extern void calf_line_graph_expose_request (GtkWidget *widget, bool force = false);
 134
 135 G_END_DECLS
 136
 137 #endif