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gimp/app/tools/gimpselectiontool.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 <gdk/gdkkeysyms.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimpchannel.h"
#include "core/gimpimage.h"
#include "core/gimptoolinfo.h"
#include "display/gimpdisplay.h"
#include "gimpeditselectiontool.h"
#include "gimpselectiontool.h"
#include "gimpselectionoptions.h"
#include "gimptoolcontrol.h"
static void gimp_selection_tool_class_init (GimpSelectionToolClass *klass);
static void gimp_selection_tool_init (GimpSelectionTool *sel_tool);
static void gimp_selection_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_selection_tool_oper_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_selection_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp);
static GimpDrawToolClass *parent_class = NULL;
GType
gimp_selection_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpSelectionToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_selection_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpSelectionTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_selection_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_DRAW_TOOL,
"GimpSelectionTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_selection_tool_class_init (GimpSelectionToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
tool_class->modifier_key = gimp_selection_tool_modifier_key;
tool_class->key_press = gimp_edit_selection_tool_key_press;
tool_class->oper_update = gimp_selection_tool_oper_update;
tool_class->cursor_update = gimp_selection_tool_cursor_update;
}
static void
gimp_selection_tool_init (GimpSelectionTool *selection_tool)
{
selection_tool->op = SELECTION_REPLACE;
selection_tool->saved_op = SELECTION_REPLACE;
}
static void
gimp_selection_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpSelectionTool *selection_tool = GIMP_SELECTION_TOOL (tool);
GimpSelectionOptions *options;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
if (key == GDK_SHIFT_MASK || key == GDK_CONTROL_MASK)
{
SelectOps button_op = options->operation;
if (press)
{
if (key == (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK)))
{
/* first modifier pressed */
selection_tool->saved_op = options->operation;
}
}
else
{
if (! (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK)))
{
/* last modifier released */
button_op = selection_tool->saved_op;
}
}
if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK))
{
button_op = SELECTION_INTERSECT;
}
else if (state & GDK_SHIFT_MASK)
{
button_op = SELECTION_ADD;
}
else if (state & GDK_CONTROL_MASK)
{
button_op = SELECTION_SUBTRACT;
}
if (button_op != options->operation)
{
g_object_set (options, "operation", button_op, NULL);
}
}
}
static void
gimp_selection_tool_oper_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpSelectionTool *selection_tool = GIMP_SELECTION_TOOL (tool);
GimpSelectionOptions *options;
GimpChannel *selection;
GimpLayer *layer;
GimpLayer *floating_sel;
gboolean move_layer = FALSE;
gboolean move_floating_sel = FALSE;
options = GIMP_SELECTION_OPTIONS (tool->tool_info->tool_options);
selection = gimp_image_get_mask (gdisp->gimage);
layer = gimp_image_pick_correlate_layer (gdisp->gimage,
coords->x, coords->y);
floating_sel = gimp_image_floating_sel (gdisp->gimage);
if (layer)
{
if (floating_sel)
{
if (layer == floating_sel)
move_floating_sel = TRUE;
}
else if (gimp_channel_value (selection, coords->x, coords->y))
{
move_layer = TRUE;
}
}
if ((state & GDK_MOD1_MASK) && (state & GDK_CONTROL_MASK) && move_layer)
{
selection_tool->op = SELECTION_MOVE_COPY; /* move a copy of the selection */
}
else if ((state & GDK_MOD1_MASK) && ! gimp_channel_is_empty (selection))
{
selection_tool->op = SELECTION_MOVE_MASK; /* move the selection mask */
}
else if (! (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK)) &&
(move_layer || move_floating_sel))
{
selection_tool->op = SELECTION_MOVE; /* move the selection */
}
else if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK))
{
selection_tool->op = SELECTION_INTERSECT; /* intersect with selection */
}
else if (state & GDK_SHIFT_MASK)
{
selection_tool->op = SELECTION_ADD; /* add to the selection */
}
else if (state & GDK_CONTROL_MASK)
{
selection_tool->op = SELECTION_SUBTRACT; /* subtract from the selection */
}
else if (floating_sel)
{
selection_tool->op = SELECTION_ANCHOR; /* anchor the selection */
}
else
{
selection_tool->op = options->operation;
}
}
static void
gimp_selection_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpSelectionTool *selection_tool = GIMP_SELECTION_TOOL (tool);
GimpToolCursorType tool_cursor;
GimpCursorModifier cmodifier;
tool_cursor = gimp_tool_control_get_tool_cursor (tool->control);
cmodifier = GIMP_CURSOR_MODIFIER_NONE;
switch (selection_tool->op)
{
case SELECTION_ADD:
cmodifier = GIMP_CURSOR_MODIFIER_PLUS;
break;
case SELECTION_SUBTRACT:
cmodifier = GIMP_CURSOR_MODIFIER_MINUS;
break;
case SELECTION_INTERSECT:
cmodifier = GIMP_CURSOR_MODIFIER_INTERSECT;
break;
case SELECTION_REPLACE:
break;
case SELECTION_MOVE_MASK:
cmodifier = GIMP_CURSOR_MODIFIER_MOVE;
break;
case SELECTION_MOVE:
case SELECTION_MOVE_COPY:
tool_cursor = GIMP_TOOL_CURSOR_MOVE;
break;
case SELECTION_ANCHOR:
cmodifier = GIMP_CURSOR_MODIFIER_ANCHOR;
break;
}
gimp_tool_set_cursor (tool, gdisp,
GIMP_CURSOR_MOUSE, tool_cursor, cmodifier);
}
/* public functions */
gboolean
gimp_selection_tool_start_edit (GimpSelectionTool *sel_tool,
GimpCoords *coords)
{
GimpTool *tool;
g_return_val_if_fail (GIMP_IS_SELECTION_TOOL (sel_tool), FALSE);
g_return_val_if_fail (coords != NULL, FALSE);
tool = GIMP_TOOL (sel_tool);
g_return_val_if_fail (GIMP_IS_DISPLAY (tool->gdisp), FALSE);
g_return_val_if_fail (gimp_tool_control_is_active (tool->control), FALSE);
switch (sel_tool->op)
{
case SELECTION_MOVE_MASK:
gimp_edit_selection_tool_start (tool, tool->gdisp, coords,
GIMP_TRANSLATE_MODE_MASK, FALSE);
return TRUE;
case SELECTION_MOVE:
gimp_edit_selection_tool_start (tool, tool->gdisp, coords,
GIMP_TRANSLATE_MODE_MASK_TO_LAYER, FALSE);
return TRUE;
case SELECTION_MOVE_COPY:
gimp_edit_selection_tool_start (tool, tool->gdisp, coords,
GIMP_TRANSLATE_MODE_MASK_COPY_TO_LAYER,
FALSE);
return TRUE;
default:
break;
}
return FALSE;
}
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