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

   1
   2 #include "Drawing.h"
   3
   4 /*****************************************************************************
   5  *                              Drawing functions                            *
   6  *****************************************************************************/
   7
   8 typedef enum
   9 {
  10         RED,
  11         GREEN,
  12         BLUE,
  13         WHITE,
  14         BLACK
  15
  16 } ControlFlowColors;
  17
  18 /* Vector of unallocated colors */
  19 static GdkColor CF_Colors [] =
  20 {
  21         { 0, 0xffff, 0x0000, 0x0000 },  // RED
  22         { 0, 0x0000, 0xffff, 0x0000 },  // GREEN
  23         { 0, 0x0000, 0x0000, 0xffff },  // BLUE
  24         { 0, 0xffff, 0xffff, 0xffff },  // WHITE
  25         { 0, 0x0000, 0x0000, 0x0000 }   // BLACK
  26 };
  27
  28
  29 typedef struct _Drawing_t {
  30         GtkWidget *Drawing_Area_V
  31
  32         guint height, width;
  33
  34 } Drawing_t;
  35
  36
  37 Drawing_t *Drawing(void)
  38 {
  39
  40         Drawing_t Drawing = g_new(Drawing_t, 1);
  41
  42         Drawing->Drawing_Area_V = gtk_drawing_area_new ();
  43
  44         g_object_set_data_full(
  45                         G_OBJECT(Drawing->Drawing_Area_V),
  46                         "Drawing_Data",
  47                         Drawing,
  48                         (GDestroyNotify)Drawing_destroy);
  49
  50         gtk_widget_modify_bg(   Control_Flow_Data->Drawing_Area_V,
  51                                 GTK_STATE_NORMAL,
  52                                 &CF_Colors[BLACK]);
  53
  54
  55         return Drawing;
  56 }
  57
  58 void Drawing_destroy(Drawing_t *Drawing)
  59 {
  60
  61         g_object_unref( G_OBJECT(Drawing->Drawing_Area_V));
  62
  63         g_free(Drawing);
  64 }
  65
  66 /* get_time_from_pixels
  67  *
  68  * Get the time interval from window time and pixels, and pixels requested. This
  69  * function uses TimeMul, which should only be used if the float value is lower
  70  * that 4, and here it's always lower than 1, so it's ok.
  71  */
  72 void convert_pixels_to_time(
  73                 Drawing_t *Drawing,
  74                 guint x,
  75                 LttTime *window_time_begin,
  76                 LttTime *window_time_end,
  77                 LttTime *time,
  78                 );
  79 {
  80         LttTime window_time_interval;
  81
  82         TimeSub(window_time_interval, *window_time_end, window_time_begin);
  83
  84
  85         TimeMul(*time, window_time_interval,
  86                         (x/(float)Drawing->width));
  87         TimeAdd(*time, window_time_begin, *time);
  88
  89 }
  90
  91
  92
  93 void convert_time_to_pixels(
  94                 LttTime window_time_begin,
  95                 LttTime window_time_end,
  96                 LttTime time,
  97                 Drawing_t *Drawing,
  98                 guint *x,
  99                 )
 100 {
 101         LttTime window_time_interval;
 102
 103         TimeSub(window_time_interval, window_time_end, window_time_begin);
 104
 105         TimeSub(time, time, wimdow_time_begin);
 106
 107         *x = (guint)((time/(float)window_time_interval) * Drawing->width);
 108
 109 }
 110
 111
 112
 113 void Drawing_Resize(Drawing_t *Drawing, guint h, guint, w)
 114 {
 115         guint w;
 116
 117         Drawing->height = h ;
 118         Drawing->weight = w ;
 119
 120         gtk_widget_set_size_request (   Control_Flow_Data->Drawing_Area_V,
 121                                         Drawing->weight,
 122                                         Drawing->height);
 123
 124
 125 }
 126
 127
 128