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gimp/app/tools/gimpfreeselecttool.c

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/* 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/gimpchannel.h"
#include "core/gimpchannel-select.h"
#include "core/gimpimage.h"
#include "core/gimplayer-floating-sel.h"
#include "core/gimptoolinfo.h"
#include "widgets/gimphelp-ids.h"
#include "display/gimpdisplay.h"
#include "gimpfreeselecttool.h"
#include "gimpselectionoptions.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
#define DEFAULT_MAX_INC 1024
static void gimp_free_select_tool_class_init (GimpFreeSelectToolClass *klass);
static void gimp_free_select_tool_init (GimpFreeSelectTool *free_select);
static void gimp_free_select_tool_finalize (GObject *object);
static void gimp_free_select_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *gdisp);
static void gimp_free_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_free_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_free_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_free_select_tool_draw (GimpDrawTool *draw_tool);
static void gimp_free_select_tool_real_select (GimpFreeSelectTool *free_sel,
GimpDisplay *gdisp);
static void gimp_free_select_tool_add_point (GimpFreeSelectTool *free_sel,
gdouble x,
gdouble y);
static void gimp_free_select_tool_move_points (GimpFreeSelectTool *free_sel,
gdouble dx,
gdouble dy);
static GimpSelectionToolClass *parent_class = NULL;
/* public functions */
void
gimp_free_select_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_FREE_SELECT_TOOL,
GIMP_TYPE_SELECTION_OPTIONS,
gimp_selection_options_gui,
0,
"gimp-free-select-tool",
_("Free Select"),
_("Select hand-drawn regions"),
N_("_Free Select"), "F",
NULL, GIMP_HELP_TOOL_FREE_SELECT,
GIMP_STOCK_TOOL_FREE_SELECT,
data);
}
GType
gimp_free_select_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpFreeSelectToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_free_select_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpFreeSelectTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_free_select_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_SELECTION_TOOL,
"GimpFreeSelectTool",
&tool_info, 0);
}
return tool_type;
}
void
gimp_free_select_tool_select (GimpFreeSelectTool *free_sel,
GimpDisplay *gdisp)
{
g_return_if_fail (GIMP_IS_FREE_SELECT_TOOL (free_sel));
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
GIMP_FREE_SELECT_TOOL_GET_CLASS (free_sel)->select (free_sel, gdisp);
}
/* private functions */
static void
gimp_free_select_tool_class_init (GimpFreeSelectToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_free_select_tool_finalize;
tool_class->control = gimp_free_select_tool_control;
tool_class->button_press = gimp_free_select_tool_button_press;
tool_class->button_release = gimp_free_select_tool_button_release;
tool_class->motion = gimp_free_select_tool_motion;
draw_tool_class->draw = gimp_free_select_tool_draw;
klass->select = gimp_free_select_tool_real_select;
}
static void
gimp_free_select_tool_init (GimpFreeSelectTool *free_select)
{
GimpTool *tool = GIMP_TOOL (free_select);
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_FREE_SELECT);
free_select->points = NULL;
free_select->num_points = 0;
free_select->max_segs = 0;
}
static void
gimp_free_select_tool_finalize (GObject *object)
{
GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (object);
if (free_sel->points)
{
g_free (free_sel->points);
free_sel->points = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_free_select_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *gdisp)
{
switch (action)
{
case HALT:
GIMP_FREE_SELECT_TOOL (tool)->num_points = 0;
break;
default:
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
}
static void
gimp_free_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (tool);
gimp_tool_control_activate (tool->control);
tool->gdisp = gdisp;
if (gimp_selection_tool_start_edit (GIMP_SELECTION_TOOL (free_sel), coords))
return;
free_sel->last_coords = *coords;
free_sel->num_points = 0;
gimp_free_select_tool_add_point (free_sel, coords->x, coords->y);
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), gdisp);
}
static void
gimp_free_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (tool);
GimpSelectionOptions *options;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
gimp_tool_control_halt (tool->control);
/* First take care of the case where the user "cancels" the action */
if (state & GDK_BUTTON3_MASK)
return;
if (free_sel->num_points == 1)
{
/* If there is a floating selection, anchor it */
if (gimp_image_floating_sel (gdisp->gimage))
{
floating_sel_anchor (gimp_image_floating_sel (gdisp->gimage));
}
/* Otherwise, clear the selection mask */
else
{
gimp_channel_clear (gimp_image_get_mask (gdisp->gimage), NULL, TRUE);
}
}
else
{
GIMP_FREE_SELECT_TOOL_GET_CLASS (free_sel)->select (free_sel, gdisp);
}
gimp_image_flush (gdisp->gimage);
}
static void
gimp_free_select_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (tool);
GimpSelectionTool *sel_tool = GIMP_SELECTION_TOOL (tool);
if (sel_tool->op == SELECTION_ANCHOR)
{
sel_tool->op = SELECTION_REPLACE;
gimp_tool_cursor_update (tool, coords, state, gdisp);
}
if (state & GDK_MOD1_MASK)
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
gimp_free_select_tool_move_points (free_sel,
coords->x - free_sel->last_coords.x,
coords->y - free_sel->last_coords.y);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
else
{
gimp_free_select_tool_add_point (free_sel, coords->x, coords->y);
gimp_draw_tool_draw_line (GIMP_DRAW_TOOL (tool),
free_sel->points[free_sel->num_points - 2].x,
free_sel->points[free_sel->num_points - 2].y,
free_sel->points[free_sel->num_points - 1].x,
free_sel->points[free_sel->num_points - 1].y,
FALSE);
}
free_sel->last_coords = *coords;
}
static void
gimp_free_select_tool_draw (GimpDrawTool *draw_tool)
{
GimpFreeSelectTool *free_sel = GIMP_FREE_SELECT_TOOL (draw_tool);
gint i;
for (i = 1; i < free_sel->num_points; i++)
{
gimp_draw_tool_draw_line (draw_tool,
free_sel->points[i - 1].x,
free_sel->points[i - 1].y,
free_sel->points[i].x,
free_sel->points[i].y,
FALSE);
}
}
static void
gimp_free_select_tool_real_select (GimpFreeSelectTool *free_sel,
GimpDisplay *gdisp)
{
GimpTool *tool = GIMP_TOOL (free_sel);
GimpSelectionOptions *options;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
gimp_channel_select_polygon (gimp_image_get_mask (gdisp->gimage),
tool->tool_info->blurb,
free_sel->num_points,
free_sel->points,
GIMP_SELECTION_TOOL (tool)->op,
options->antialias,
options->feather,
options->feather_radius,
options->feather_radius);
}
static void
gimp_free_select_tool_add_point (GimpFreeSelectTool *free_sel,
gdouble x,
gdouble y)
{
if (free_sel->num_points >= free_sel->max_segs)
{
free_sel->max_segs += DEFAULT_MAX_INC;
free_sel->points = g_realloc (free_sel->points,
sizeof (GimpVector2) * free_sel->max_segs);
}
free_sel->points[free_sel->num_points].x = x;
free_sel->points[free_sel->num_points].y = y;
free_sel->num_points++;
}
static void
gimp_free_select_tool_move_points (GimpFreeSelectTool *free_sel,
gdouble dx,
gdouble dy)
{
gint i;
for (i = 0; i < free_sel->num_points; i++)
{
free_sel->points[i].x += dx;
free_sel->points[i].y += dy;
}
}
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