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gimp/app/tools/gimpbycolorselecttool.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 "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimpchannel-select.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimppickable.h"
#include "core/gimptoolinfo.h"
#include "widgets/gimphelp-ids.h"
#include "display/gimpdisplay.h"
#include "gimpbycolorselecttool.h"
#include "gimpselectionoptions.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
static void gimp_by_color_select_tool_class_init (GimpByColorSelectToolClass *klass);
static void gimp_by_color_select_tool_init (GimpByColorSelectTool *by_color_select);
static void gimp_by_color_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_by_color_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_by_color_select_tool_oper_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_by_color_select_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp);
static GimpSelectionToolClass *parent_class = NULL;
/* public functions */
void
gimp_by_color_select_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_BY_COLOR_SELECT_TOOL,
GIMP_TYPE_SELECTION_OPTIONS,
gimp_selection_options_gui,
0,
"gimp-by-color-select-tool",
_("Select By Color"),
_("Select regions by color"),
N_("_By Color Select"), "<shift>O",
NULL, GIMP_HELP_TOOL_BY_COLOR_SELECT,
GIMP_STOCK_TOOL_BY_COLOR_SELECT,
data);
}
GType
gimp_by_color_select_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpByColorSelectToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_by_color_select_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpByColorSelectTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_by_color_select_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_SELECTION_TOOL,
"GimpByColorSelectTool",
&tool_info, 0);
}
return tool_type;
}
/* private functions */
static void
gimp_by_color_select_tool_class_init (GimpByColorSelectToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
tool_class->button_press = gimp_by_color_select_tool_button_press;
tool_class->button_release = gimp_by_color_select_tool_button_release;
tool_class->oper_update = gimp_by_color_select_tool_oper_update;
tool_class->cursor_update = gimp_by_color_select_tool_cursor_update;
}
static void
gimp_by_color_select_tool_init (GimpByColorSelectTool *by_color_select)
{
by_color_select->x = 0;
by_color_select->y = 0;
}
static void
gimp_by_color_select_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpByColorSelectTool *by_color_sel = GIMP_BY_COLOR_SELECT_TOOL (tool);
GimpSelectionOptions *options;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
tool->drawable = gimp_image_active_drawable (gdisp->gimage);
gimp_tool_control_activate (tool->control);
tool->gdisp = gdisp;
by_color_sel->x = coords->x;
by_color_sel->y = coords->y;
if (! options->sample_merged)
{
gint off_x, off_y;
gimp_item_offsets (GIMP_ITEM (gimp_image_active_drawable (gdisp->gimage)),
&off_x, &off_y);
by_color_sel->x -= off_x;
by_color_sel->y -= off_y;
}
}
static void
gimp_by_color_select_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpByColorSelectTool *by_color_sel = GIMP_BY_COLOR_SELECT_TOOL (tool);
GimpSelectionTool *sel_tool = GIMP_SELECTION_TOOL (tool);
GimpSelectionOptions *options;
GimpDrawable *drawable;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
drawable = gimp_image_active_drawable (gdisp->gimage);
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 (by_color_sel->x >= 0 &&
by_color_sel->y >= 0 &&
by_color_sel->x < gimp_item_width (GIMP_ITEM (drawable)) &&
by_color_sel->y < gimp_item_height (GIMP_ITEM (drawable)))
{
GimpPickable *pickable;
guchar *col;
if (options->sample_merged)
pickable = GIMP_PICKABLE (gdisp->gimage->projection);
else
pickable = GIMP_PICKABLE (drawable);
col = gimp_pickable_get_color_at (pickable,
by_color_sel->x,
by_color_sel->y);
if (col)
{
GimpRGB color;
gimp_rgba_set_uchar (&color, col[0], col[1], col[2], col[3]);
g_free (col);
gimp_channel_select_by_color (gimp_image_get_mask (gdisp->gimage),
drawable,
options->sample_merged,
&color,
options->threshold,
options->select_transparent,
sel_tool->op,
options->antialias,
options->feather,
options->feather_radius,
options->feather_radius);
gimp_image_flush (gdisp->gimage);
}
}
}
static void
gimp_by_color_select_tool_oper_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpSelectionTool *sel_tool = GIMP_SELECTION_TOOL (tool);
GimpSelectionOptions *options;
if (gimp_tool_control_is_active (tool->control))
return;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK))
{
sel_tool->op = SELECTION_INTERSECT; /* intersect with selection */
}
else if (state & GDK_SHIFT_MASK)
{
sel_tool->op = SELECTION_ADD; /* add to the selection */
}
else if (state & GDK_CONTROL_MASK)
{
sel_tool->op = SELECTION_SUBTRACT; /* subtract from the selection */
}
else
{
sel_tool->op = options->operation;
}
}
static void
gimp_by_color_select_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpSelectionOptions *options;
GimpLayer *layer;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
layer = gimp_image_pick_correlate_layer (gdisp->gimage, coords->x, coords->y);
if (! options->sample_merged &&
layer && layer != gdisp->gimage->active_layer)
{
gimp_tool_control_set_cursor (tool->control, GIMP_CURSOR_BAD);
}
else
{
gimp_tool_control_set_cursor (tool->control, GIMP_CURSOR_MOUSE);
}
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, gdisp);
}
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