ltt/branches/poly/lttv/modules/guiControlFlow/Drawing.c

   1
   2 #include "Drawing.h"
   3 #include <gtk/gtk.h>
   4 #include <gdk/gdk.h>
   5
   6 /*****************************************************************************
   7  *                              Drawing functions                            *
   8  *****************************************************************************/
   9
  10 typedef enum
  11 {
  12         RED,
  13         GREEN,
  14         BLUE,
  15         WHITE,
  16         BLACK
  17
  18 } ControlFlowColors;
  19
  20 /* Vector of unallocated colors */
  21 static GdkColor CF_Colors [] =
  22 {
  23         { 0, 0xffff, 0x0000, 0x0000 },  // RED
  24         { 0, 0x0000, 0xffff, 0x0000 },  // GREEN
  25         { 0, 0x0000, 0x0000, 0xffff },  // BLUE
  26         { 0, 0xffff, 0xffff, 0xffff },  // WHITE
  27         { 0, 0x0000, 0x0000, 0x0000 }   // BLACK
  28 };
  29
  30
  31 struct _Drawing_t {
  32         GtkWidget       *Drawing_Area_V;
  33         GdkPixmap       *Pixmap;
  34
  35         gint            height, width, depth;
  36
  37 };
  38
  39
  40 Drawing_t *Drawing_construct(void)
  41 {
  42
  43         Drawing_t *Drawing = g_new(Drawing_t, 1);
  44
  45         Drawing->Drawing_Area_V = gtk_drawing_area_new ();
  46
  47         g_object_set_data_full(
  48                         G_OBJECT(Drawing->Drawing_Area_V),
  49                         "Link_Drawing_Data",
  50                         Drawing,
  51                         (GDestroyNotify)Drawing_destroy);
  52
  53         gtk_widget_modify_bg(   Drawing->Drawing_Area_V,
  54                                 GTK_STATE_NORMAL,
  55                                 &CF_Colors[BLACK]);
  56
  57         gdk_window_get_geometry(Drawing->Drawing_Area_V->window,
  58                         NULL, NULL,
  59                         &(Drawing->width),
  60                         &(Drawing->height),
  61                         &(Drawing->depth));
  62
  63         Drawing->Pixmap = gdk_pixmap_new(
  64                         Drawing->Drawing_Area_V->window,
  65                         Drawing->width,
  66                         Drawing->height,
  67                         Drawing->depth);
  68
  69         return Drawing;
  70 }
  71
  72 void Drawing_destroy(Drawing_t *Drawing)
  73 {
  74
  75         // Do not unref here, Drawing_t destroyed by it's widget.
  76         //g_object_unref( G_OBJECT(Drawing->Drawing_Area_V));
  77
  78         g_free(Drawing);
  79 }
  80
  81 GtkWidget *Drawing_getWidget(Drawing_t *Drawing)
  82 {
  83         return Drawing->Drawing_Area_V;
  84 }
  85
  86 /* get_time_from_pixels
  87  *
  88  * Get the time interval from window time and pixels, and pixels requested. This
  89  * function uses TimeMul, which should only be used if the float value is lower
  90  * that 4, and here it's always lower than 1, so it's ok.
  91  */
  92 void convert_pixels_to_time(
  93                 Drawing_t *Drawing,
  94                 guint x,
  95                 LttTime *window_time_begin,
  96                 LttTime *window_time_end,
  97                 LttTime *time)
  98 {
  99         LttTime window_time_interval;
 100
 101         TimeSub(window_time_interval, *window_time_end, *window_time_begin);
 102
 103
 104         TimeMul(*time, window_time_interval,
 105                         (x/(float)Drawing->width));
 106         TimeAdd(*time, *window_time_begin, *time);
 107
 108 }
 109
 110
 111
 112 void convert_time_to_pixels(
 113                 LttTime window_time_begin,
 114                 LttTime window_time_end,
 115                 LttTime time,
 116                 Drawing_t *Drawing,
 117                 guint *x)
 118 {
 119         LttTime window_time_interval;
 120         float interval_float, time_float;
 121
 122         TimeSub(window_time_interval, window_time_end, window_time_begin);
 123
 124         TimeSub(time, time, window_time_begin);
 125
 126         interval_float = (window_time_interval.tv_sec * NANSECOND_CONST)
 127                         + window_time_interval.tv_nsec;
 128         time_float = (time.tv_sec * NANSECOND_CONST)
 129                         + time.tv_nsec;
 130
 131         *x = (guint)(time_float/interval_float * Drawing->width);
 132
 133 }
 134
 135
 136
 137 void Drawing_Resize(Drawing_t *Drawing, guint h, guint w)
 138 {
 139         Drawing->height = h ;
 140         Drawing->width = w ;
 141
 142         gtk_widget_set_size_request (   Drawing->Drawing_Area_V,
 143                                         Drawing->width,
 144                                         Drawing->height);
 145
 146
 147 }