gimp/app/tools/gimpairbrushtool.c

/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <gtk/gtk.h>

#include "libgimpwidgets/gimpwidgets.h"

#include "tools-types.h"

#include "core/gimptoolinfo.h"

#include "paint/gimpairbrush.h"

#include "gimpairbrushtool.h"
#include "paint_options.h"
#include "gimptool.h"

#include "libgimp/gimpintl.h"


#define MAX_PRESSURE                 0.075

#define AIRBRUSH_DEFAULT_RATE        0.0
#define AIRBRUSH_DEFAULT_PRESSURE    10.0
#define AIRBRUSH_DEFAULT_INCREMENTAL FALSE


static void   gimp_airbrush_tool_class_init (GimpAirbrushToolClass *klass);
static void   gimp_airbrush_tool_init       (GimpAirbrushTool      *airbrush);

static GimpToolOptions * airbrush_options_new   (GimpToolInfo    *tool_info);
static void              airbrush_options_reset (GimpToolOptions *tool_options);


static GimpPaintToolClass *parent_class = NULL;


/*  functions  */

void
gimp_airbrush_tool_register (Gimp                     *gimp,
                             GimpToolRegisterCallback  callback)
{
  (* callback) (gimp,
                GIMP_TYPE_AIRBRUSH_TOOL,
                airbrush_options_new,
                TRUE,
                "gimp:airbrush_tool",
                _("Airbrush"),
                _("Airbrush with variable pressure"),
                N_("/Tools/Paint Tools/Airbrush"), "A",
                NULL, "tools/airbrush.html",
                GIMP_STOCK_TOOL_AIRBRUSH);
}

GType
gimp_airbrush_tool_get_type (void)
{
  static GType tool_type = 0;

  if (! tool_type)
    {
      static const GTypeInfo tool_info =
      {
        sizeof (GimpAirbrushToolClass),
	(GBaseInitFunc) NULL,
	(GBaseFinalizeFunc) NULL,
	(GClassInitFunc) gimp_airbrush_tool_class_init,
	NULL,           /* class_finalize */
	NULL,           /* class_data     */
	sizeof (GimpAirbrushTool),
	0,              /* n_preallocs    */
	(GInstanceInitFunc) gimp_airbrush_tool_init,
      };

      tool_type = g_type_register_static (GIMP_TYPE_PAINT_TOOL,
					  "GimpAirbrushTool",
                                          &tool_info, 0);
    }

  return tool_type;
}

static void 
gimp_airbrush_tool_class_init (GimpAirbrushToolClass *klass)
{
  GObjectClass *object_class;

  object_class = G_OBJECT_CLASS (klass);

  parent_class = g_type_class_peek_parent (klass);
}

static void
gimp_airbrush_tool_init (GimpAirbrushTool *airbrush)
{
  GimpTool      *tool;
  GimpPaintTool *paint_tool;

  tool       = GIMP_TOOL (airbrush);
  paint_tool = GIMP_PAINT_TOOL (airbrush);

  tool->tool_cursor       = GIMP_AIRBRUSH_TOOL_CURSOR;

  paint_tool->pick_colors = TRUE;
  paint_tool->core        = g_object_new (GIMP_TYPE_AIRBRUSH, NULL);
}

#if 0

gboolean
airbrush_non_gui_default (GimpDrawable *drawable,
			  gint          num_strokes,
			  gdouble      *stroke_array)
{
  GimpToolInfo    *tool_info;
  AirbrushOptions *options;

  gdouble pressure = AIRBRUSH_DEFAULT_PRESSURE;

  tool_info = tool_manager_get_info_by_type (drawable->gimage->gimp,
                                             GIMP_TYPE_AIRBRUSH_TOOL);

  options = (AirbrushOptions *) tool_info->tool_options;

  if (options)
    pressure = options->pressure;

  return airbrush_non_gui (drawable, pressure, num_strokes, stroke_array);
}

gboolean
airbrush_non_gui (GimpDrawable *drawable,
    		  gdouble       pressure,
		  gint          num_strokes,
		  gdouble      *stroke_array)
{
  static GimpAirbrushTool *non_gui_airbrush = NULL;

  GimpPaintTool *paint_tool;
  gint           i;

  if (! non_gui_airbrush)
    {
      non_gui_airbrush = g_object_new (GIMP_TYPE_AIRBRUSH_TOOL, NULL);
    }

  paint_tool = GIMP_PAINT_TOOL (non_gui_airbrush);

  if (gimp_paint_tool_start (paint_tool, drawable,
                             stroke_array[0],
                             stroke_array[1]))
    {
      non_gui_rate        = AIRBRUSH_DEFAULT_RATE;
      non_gui_pressure    = pressure;
      non_gui_incremental = AIRBRUSH_DEFAULT_INCREMENTAL;

      paint_tool->start_coords.x = paint_tool->last_coords.x = stroke_array[0];
      paint_tool->start_coords.y = paint_tool->last_coords.y = stroke_array[1];

      gimp_airbrush_tool_paint (paint_tool, drawable, MOTION_PAINT);

      for (i = 1; i < num_strokes; i++)
	{
	  paint_tool->cur_coords.x = stroke_array[i * 2 + 0];
	  paint_tool->cur_coords.y = stroke_array[i * 2 + 1];

	  gimp_paint_tool_interpolate (paint_tool, drawable);

	  paint_tool->last_coords.x = paint_tool->cur_coords.x;
	  paint_tool->last_coords.y = paint_tool->cur_coords.y;
	}

      gimp_paint_tool_finish (paint_tool, drawable);

      return TRUE;
    }

  return FALSE;
}

#endif

static GimpToolOptions *
airbrush_options_new (GimpToolInfo *tool_info)
{
  AirbrushOptions *options;
  GtkWidget       *vbox;
  GtkWidget       *table;
  GtkWidget       *scale;

  options = g_new0 (AirbrushOptions, 1);

  paint_options_init ((PaintOptions *) options, tool_info);

  ((GimpToolOptions *) options)->reset_func = airbrush_options_reset;

  options->rate     = options->rate_d     = 80.0;
  options->pressure = options->pressure_d = AIRBRUSH_DEFAULT_PRESSURE;

  /*  the main vbox  */
  vbox = ((GimpToolOptions *) options)->main_vbox;

  /*  the rate scale  */
  table = gtk_table_new (2, 2, FALSE);
  gtk_table_set_col_spacing (GTK_TABLE (table), 0, 4);
  gtk_table_set_row_spacings (GTK_TABLE (table), 1);
  gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);

  options->rate_w =
    gtk_adjustment_new (options->rate_d, 0.0, 150.0, 1.0, 1.0, 0.0);
  scale = gtk_hscale_new (GTK_ADJUSTMENT (options->rate_w));
  gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
  gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
  g_signal_connect (G_OBJECT (options->rate_w), "value_changed",
                    G_CALLBACK (gimp_double_adjustment_update),
                    &options->rate);
  gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
			     _("Rate:"), 1.0, 1.0,
			     scale, 1, FALSE);

  /*  the pressure scale  */
  options->pressure_w =
    gtk_adjustment_new (options->pressure_d, 0.0, 100.0, 1.0, 1.0, 0.0);
  scale = gtk_hscale_new (GTK_ADJUSTMENT (options->pressure_w));
  gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
  gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
  g_signal_connect (G_OBJECT (options->pressure_w), "value_changed",
                    G_CALLBACK (gimp_double_adjustment_update),
                    &options->pressure);
  gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
			     _("Pressure:"), 1.0, 1.0,
			     scale, 1, FALSE);

  gtk_widget_show (table);

  return (GimpToolOptions *) options;
}

static void
airbrush_options_reset (GimpToolOptions *tool_options)
{
  AirbrushOptions *options;

  options = (AirbrushOptions *) tool_options;

  paint_options_reset (tool_options);

  gtk_adjustment_set_value (GTK_ADJUSTMENT (options->rate_w),
			    options->rate_d);
  gtk_adjustment_set_value (GTK_ADJUSTMENT (options->pressure_w),
			    options->pressure_d);
}