#include <stdio.h>
#include <stdlib.h>

#include <gtk/gtk.h>

#include "libgimp/gimp.h"

#include "fp.h"

extern AdvancedWindow AW;
extern FP_Params Current;


extern gint nudgeArray[256];


void
slider_erase (GdkWindow *window,
	      int        xpos)
{
  gdk_window_clear_area (window, MARGIN + xpos - (RANGE_HEIGHT - 1) / 2, 0,
			 RANGE_HEIGHT, RANGE_HEIGHT);
}

void
draw_slider(GdkWindow *window,
	    GdkGC     *border_gc,
	    GdkGC     *fill_gc,
	    int        xpos)
{
  gint i;

  for (i = 0; i < RANGE_HEIGHT; i++)
    gdk_draw_line (window, fill_gc, MARGIN + xpos-i/2, i, MARGIN + xpos+i/2,i);
  
  gdk_draw_line (window, border_gc, MARGIN + xpos, 0,
		 MARGIN + xpos - (RANGE_HEIGHT - 1) / 2, RANGE_HEIGHT - 1);

  gdk_draw_line (window, border_gc, MARGIN + xpos, 0,
		 MARGIN + xpos + (RANGE_HEIGHT - 1) / 2, RANGE_HEIGHT - 1);

  gdk_draw_line (window, border_gc, MARGIN + xpos-(RANGE_HEIGHT-1)/2,RANGE_HEIGHT-1,
		 MARGIN + xpos + (RANGE_HEIGHT-1)/2, RANGE_HEIGHT-1);
}


void
draw_it (GtkWidget *widget)
{
  draw_slider (AW.aliasingGraph->window,
	       AW.aliasingGraph->style->black_gc,
	       AW.aliasingGraph->style->dark_gc[GTK_STATE_NORMAL],
	       Current.Cutoffs[SHADOWS]);

  draw_slider (AW.aliasingGraph->window,
	       AW.aliasingGraph->style->black_gc,
	       AW.aliasingGraph->style->dark_gc[GTK_STATE_NORMAL],
	       Current.Cutoffs[MIDTONES]);

  draw_slider (AW.aliasingGraph->window,
	       AW.aliasingGraph->style->black_gc,
	       AW.aliasingGraph->style->dark_gc[GTK_STATE_SELECTED],
	       Current.Offset);
} 

gint     
FP_Range_Change_Events  (GtkWidget *widget, 
			 GdkEvent  *event, 
			 FP_Params *current)
{
  GdkEventButton *bevent;
  GdkEventMotion *mevent;
  gint shad, mid, offset, min;
  static guchar  *new;
  gint  x;

  switch (event->type)
    {
    case GDK_EXPOSE:
      draw_it (NULL);
      break;
    
    case GDK_BUTTON_PRESS:
      bevent= (GdkEventButton *) event;

      shad   =  abs (bevent->x - Current.Cutoffs[SHADOWS]);
      mid    =  abs (bevent->x - Current.Cutoffs[MIDTONES]);
      offset =  abs (bevent->x - Current.Offset);
    
      min = MIN (MIN (shad, mid), offset);
    
      if (bevent->x >0 && bevent->x<256)
	{
	  if (min == shad) 
	    new = &Current.Cutoffs[SHADOWS];
	  else if (min == mid) 
	    new = &Current.Cutoffs[MIDTONES];
	  else 
	    new = &Current.Offset;

	  slider_erase (AW.aliasingGraph->window, *new);
	  *new=bevent->x;
	}

      draw_it (NULL);
  
      if (Current.RealTime)
	{
	  fp_range_preview_spill (AW.rangePreview, Current.ValueBy);
	  update_range_labels ();
	  fp_create_smoothness_graph (AW.aliasingPreview);
	  refreshPreviews (Current.VisibleFrames);
	}
      break;

    case GDK_BUTTON_RELEASE:
      if (!Current.RealTime)
	{
	  fp_range_preview_spill (AW.rangePreview, Current.ValueBy);
	  update_range_labels ();
	  fp_create_smoothness_graph (AW.aliasingPreview);
	  refreshPreviews (Current.VisibleFrames);
	}
      break;

    case GDK_MOTION_NOTIFY:
      mevent = (GdkEventMotion *) event;
      gdk_window_get_pointer (widget->window, &x, NULL, NULL);

      if (x >= 0 && x < 256)
	{
	  slider_erase (AW.aliasingGraph->window, *new);
	  *new = x;
	  draw_it (NULL);
	  if (Current.RealTime)
	    {
	      fp_range_preview_spill (AW.rangePreview, Current.ValueBy);
	      update_range_labels ();
	      fp_create_smoothness_graph (AW.aliasingPreview);
	      refreshPreviews (Current.VisibleFrames);
	    }
	}
      break;

    default:
      break;
    }

  return FALSE;
}

void
update_range_labels (void)
{
  guchar buffer[3];
  
  gtk_label_set_text (GTK_LABEL(Current.rangeLabels[1]),"0");

  g_snprintf (buffer, sizeof (buffer), "%d", Current.Cutoffs[SHADOWS]);
  gtk_label_set_text (GTK_LABEL (Current.rangeLabels[3]), buffer);
  gtk_label_set_text (GTK_LABEL (Current.rangeLabels[5]), buffer);

  g_snprintf (buffer, sizeof (buffer), "%d", Current.Cutoffs[MIDTONES]);
  gtk_label_set_text (GTK_LABEL (Current.rangeLabels[7]), buffer);
  gtk_label_set_text (GTK_LABEL (Current.rangeLabels[9]), buffer);

  gtk_label_set_text (GTK_LABEL(Current.rangeLabels[11]), "255");
}