/*
 * gtkDPS paint selection test program by Masatake YAMATO
 */

#include <stdio.h>
#include <stdlib.h>
#include "gtkDPSpaintsel.h"
#include "gtkDPS.h"
#include <DPS/dpsops.h>

#define MAX_ENTRIES (50 - 1)

static void init_gui (int argc, char *argv[]);
static void draw_entry(GtkDPSPaintSelection * paintsel,
		       DPSContext raw_ctxt,
		       GdkDPSRectangle * rect,
		       GtkDPSPaintSelectionEntry * entry);
int 
main(int argc, char *argv[])
{
  const gchar * version;
  gtk_init (&argc, &argv);
  gtk_dps_init (&argc, &argv);
  version = gtk_dps_version();
  fprintf(stderr, "GtkDPS version %s\n", version);
  init_gui(argc, argv);
  gtk_main();
  return 0;
}

static void
init_gui (int argc, char *argv[])
{
  int i;
  gchar name[8];
  GtkWidget * window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  GtkWidget * paintsel = gtk_dps_paint_selection_new(12);
  for (i = 0; i < MAX_ENTRIES; i++)
    {
      sprintf(name, "%d", i);
      gtk_dps_paint_selection_add_entry(GTK_DPS_PAINT_SELECTION(paintsel),
					NULL,
					FALSE,
					name);
    }
  gtk_signal_connect(GTK_OBJECT(paintsel),
		     "draw_entry",
		     (GtkSignalFunc)draw_entry,
		     NULL);
  gtk_widget_show(paintsel);
  gtk_container_add(GTK_CONTAINER(window), paintsel);
  gtk_signal_connect (GTK_OBJECT (window), "destroy",
		      GTK_SIGNAL_FUNC (gtk_exit), NULL);
  gtk_signal_connect (GTK_OBJECT (window), "delete_event",
		      GTK_SIGNAL_FUNC (gtk_exit), NULL);
  gtk_widget_show(window);
}

static void
draw_entry_grad(GtkDPSPaintSelection * paintsel,
		DPSContext raw_ctxt,
		GdkDPSRectangle * rect,
		GtkDPSPaintSelectionEntry * entry);
static void
draw_entry_color(GtkDPSPaintSelection * paintsel,
		 DPSContext raw_ctxt,
		 GdkDPSRectangle * rect,
		 GtkDPSPaintSelectionEntry * entry);
static void
draw_entry(GtkDPSPaintSelection * paintsel,
	   DPSContext raw_ctxt,
	   GdkDPSRectangle * rect,
	   GtkDPSPaintSelectionEntry * entry)
{
  if (entry->position%2)
    draw_entry_grad(paintsel, raw_ctxt, rect, entry);
  else
    draw_entry_color(paintsel, raw_ctxt, rect, entry);
      
}
     
static void
draw_entry_grad(GtkDPSPaintSelection * paintsel,
		DPSContext raw_ctxt,
		GdkDPSRectangle * rect,
		GtkDPSPaintSelectionEntry * entry)
{
  gint i;
  gfloat radius;
  gfloat colors[6];
  gint step = 6;
  gfloat step_invert = (1.0/(gfloat)step);
  gfloat r_step, g_step, b_step;
  for (i = 0; i < 6; i++)
    colors[i] = ((gfloat)(rand()%256))/255.0;
  DPStranslate(raw_ctxt, 
	       rect->x + (rect->width/2.0),
	       rect->y + (rect->height/2.0));
  radius = (rect->width > rect->height)?
    (rect->width/1.5):
    (rect->height/1.5);
  r_step = (colors[0] - colors[3])/(gfloat)step;
  b_step = (colors[1] - colors[4])/(gfloat)step;
  g_step = (colors[2] - colors[5])/(gfloat)step;
  
  for (i = step; i > 0; i--)
    {
      DPSsetrgbcolor(raw_ctxt, 
		     colors[3]+(i*r_step),
		     colors[4]+(i*r_step),
		     colors[5]+(i*r_step));
      DPSarc(raw_ctxt, (float)0.0, (float)0.0, 
	     step_invert*radius*(gfloat)i,
	     0.0, 360.0);
      DPSfill(raw_ctxt);
    }
}

static void
draw_entry_color(GtkDPSPaintSelection * paintsel,
		 DPSContext raw_ctxt,
		 GdkDPSRectangle * rect,
		 GtkDPSPaintSelectionEntry * entry)
{
  gint i;
  gfloat colors[3];  
  for (i = 0; i < 3; i++)
    colors[i] = ((gfloat)(rand()%256))/255.0;
  DPSsetrgbcolor(raw_ctxt, colors[0], colors[1], colors[2]);
  DPSrectfill(raw_ctxt, rect->x, rect->y, 
	      rect->width, rect->height);
}