Regarding Gtkdatabox modified example...

["nisha jain" <jain61 gmail com>]

Hi All,

 

I am facing a small issue.. I have modified the Gtkdatabox lissajous.c file  to create 3 boxes for displaying signals.

 

I  made following 3 functions for data display. But when i run the program i get signal in only 3rd box i tried to resolve

 

it but i am not sure what is going on wrong. Even though i am passing different objects of Widget box[i] i am not

 

able to get signal in first and second box...

 

Please let me know if some one can find the bug?

 

Following the function for drawing 3 boxes....

void create_box(GtkWidget *window)
{
       GtkWidget *box1;
       GtkWidget *box2;
        GtkWidget *box[4];
        GtkWidget *table[3];      
        GtkDataboxGraph *graph;
        GtkWidget separator;
        GdkColor color;
        gint i;

 
         gint signal_idle = 0;

         box1 = gtk_vbox_new(FALSE, 0); 
         gtk_container_add( GTK_CONTAINER(window), box1);

         /* Create the databoxes */
         for( i = 0; i<3; i++)
          {
                   /* Create a GtkDatabox widget along with scrollbars and rulers */
                   gtk_databox_create_box_with_scrollbars_and_rulers (&box[i], &table[i],
                                TRUE, TRUE, TRUE, TRUE);
 
                    gtk_box_pack_start (GTK_BOX (box1), table[i], TRUE, TRUE, 0);
          }
 
          // To make cross lines on the boxes

          color.red = 32768;
          color.green = 32768;
          color.blue = 32768;

           graph = gtk_databox_cross_simple_new (&color, 0);
    
            for( i = 0; i<3; i++)
            {
                     gtk_databox_graph_add (GTK_DATABOX (box[i]), graph);
            }

            // To fill up the boxes with black color
             color.red = 0;
             color.green = 0;
             color.blue = 0;//32768;

            for( i = 0; i<3; i++)
            {
                          gtk_widget_modify_bg (box[i], GTK_STATE_NORMAL, &color);
            }

             // Display signals on boxes
 
             for( i = 0; i<3; i++)
             {
                      disp_signal(box[i],color,graph);

                      signal_idle = g_idle_add ((GSourceFunc) signal_idle_func, box[i]);
             }
}

And following functions for displaying signal called from previous function......

Here SignalX and SignalY are static variable intialized in beginning of program...

void disp_signal(GtkWidget *box, GdkColor color, GtkDataboxGraph *graph )
{
         gint i; 
         signal_frequency = 0;
         signal_frequency = 3. * G_PI / 2.;
         signal_counter = 0;

#if 1 /* For testing purpose putted here replace with suitable code later */
         signalX = g_new0 (gfloat, POINTS);
         signalY = g_new0 (gfloat, POINTS);

          for (i = 0; i < POINTS; i++)
          {
                      signalX[i] = 100. * sin (i * 4 * G_PI / POINTS);
                      signalY[i] = 100. * cos (i * 4 * G_PI / POINTS);
          }

            color.red = 65535;
            color.green = 65535;
            color.blue = 0;

             graph = gtk_databox_lines_new (POINTS, signalX, signalY, &color, 1);

             gtk_databox_graph_add (GTK_DATABOX (box), graph);

            gtk_databox_auto_rescale (GTK_DATABOX (box), 0.05);
#endif
}

static gboolean
signal_idle_func (GtkDatabox * box)
{
       gfloat freq;
       gfloat off;
         gint i;

         if (!GTK_IS_DATABOX (box))
               return FALSE;

         signal_frequency += 0.001;
         off = signal_counter * 4 * G_PI / POINTS;
           freq = 14 + 10 * sin (signal_frequency);

         for (i = 0; i < POINTS; i++)
        {
                signalX[i] = 100. * sin (i * 4 * G_PI / POINTS + off);
                signalY[i] = 100. * cos (i * freq * G_PI / POINTS + off);
         }

         gtk_databox_redraw (GTK_DATABOX (box));
         return TRUE;
}

Regards,

Nisha