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a776232e141a37f5b67ca4eb5647388db07e901b
gimp/app/tools/gimpmovetool.c
Jehan 90e9eb3fca app: alt-click to pick a layer will loop through candidate layers. 
If you click on a zone filled in several visible layers, you don't
necessarily want the top layer. You may want one below. With this
change, as long as you hold alt, you will loop through all candidate
layers from top to bottom (then looping back top when reaching the
bottom).
In a first alt-click, you will always end up to the top candidate.
2019-01-07 23:08:48 +01:00

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/* GIMP - The GNU 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "config/gimpdisplayconfig.h"
#include "config/gimpguiconfig.h"
#include "core/gimp.h"
#include "core/gimp-cairo.h"
#include "core/gimpguide.h"
#include "core/gimpimage.h"
#include "core/gimpimage-pick-item.h"
#include "core/gimplayer.h"
#include "core/gimpimage-undo.h"
#include "core/gimplayermask.h"
#include "core/gimplayer-floating-selection.h"
#include "core/gimpundostack.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpcanvasitem.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-appearance.h"
#include "display/gimpdisplayshell-selection.h"
#include "display/gimpdisplayshell-transform.h"
#include "gimpeditselectiontool.h"
#include "gimpguidetool.h"
#include "gimpmoveoptions.h"
#include "gimpmovetool.h"
#include "gimptoolcontrol.h"
#include "gimptools-utils.h"
#include "gimp-intl.h"
/* local function prototypes */
static void gimp_move_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_move_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static gboolean gimp_move_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display);
static void gimp_move_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display);
static void gimp_move_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_move_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static void gimp_move_tool_draw (GimpDrawTool *draw_tool);
G_DEFINE_TYPE (GimpMoveTool, gimp_move_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_move_tool_parent_class
void
gimp_move_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_MOVE_TOOL,
GIMP_TYPE_MOVE_OPTIONS,
gimp_move_options_gui,
0,
"gimp-move-tool",
C_("tool", "Move"),
_("Move Tool: Move layers, selections, and other objects"),
N_("_Move"), "M",
NULL, GIMP_HELP_TOOL_MOVE,
GIMP_ICON_TOOL_MOVE,
data);
}
static void
gimp_move_tool_class_init (GimpMoveToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
tool_class->button_press = gimp_move_tool_button_press;
tool_class->button_release = gimp_move_tool_button_release;
tool_class->key_press = gimp_move_tool_key_press;
tool_class->modifier_key = gimp_move_tool_modifier_key;
tool_class->oper_update = gimp_move_tool_oper_update;
tool_class->cursor_update = gimp_move_tool_cursor_update;
draw_tool_class->draw = gimp_move_tool_draw;
}
static void
gimp_move_tool_init (GimpMoveTool *move_tool)
{
GimpTool *tool = GIMP_TOOL (move_tool);
gimp_tool_control_set_snap_to (tool->control, FALSE);
gimp_tool_control_set_handle_empty_image (tool->control, TRUE);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_MOVE);
move_tool->floating_layer = NULL;
move_tool->guide = NULL;
move_tool->saved_type = GIMP_TRANSFORM_TYPE_LAYER;
move_tool->old_active_layer = NULL;
move_tool->old_active_vectors = NULL;
}
static void
gimp_move_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpMoveTool *move = GIMP_MOVE_TOOL (tool);
GimpMoveOptions *options = GIMP_MOVE_TOOL_GET_OPTIONS (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GimpItem *active_item = NULL;
GimpTranslateMode translate_mode = GIMP_TRANSLATE_MODE_MASK;
const gchar *null_message = NULL;
const gchar *locked_message = NULL;
tool->display = display;
move->floating_layer = NULL;
move->guide = NULL;
if (! options->move_current)
{
const gint snap_distance = display->config->snap_distance;
if (options->move_type == GIMP_TRANSFORM_TYPE_PATH)
{
GimpVectors *vectors;
vectors = gimp_image_pick_vectors (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance));
if (vectors)
{
move->old_active_vectors =
gimp_image_get_active_vectors (image);
gimp_image_set_active_vectors (image, vectors);
}
else
{
/* no path picked */
return;
}
}
else if (options->move_type == GIMP_TRANSFORM_TYPE_LAYER)
{
GimpGuide *guide;
GimpLayer *layer;
if (gimp_display_shell_get_show_guides (shell) &&
(guide = gimp_image_pick_guide (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance))))
{
move->guide = guide;
gimp_guide_tool_start_edit (tool, display, guide);
return;
}
else if ((layer = gimp_image_pick_layer (image,
coords->x,
coords->y,
NULL)))
{
if (gimp_image_get_floating_selection (image) &&
! gimp_layer_is_floating_sel (layer))
{
/* If there is a floating selection, and this aint it,
* use the move tool to anchor it.
*/
move->floating_layer =
gimp_image_get_floating_selection (image);
gimp_tool_control_activate (tool->control);
return;
}
else
{
move->old_active_layer = gimp_image_get_active_layer (image);
gimp_image_set_active_layer (image, layer);
}
}
else
{
/* no guide and no layer picked */
return;
}
}
}
switch (options->move_type)
{
case GIMP_TRANSFORM_TYPE_PATH:
{
active_item = GIMP_ITEM (gimp_image_get_active_vectors (image));
translate_mode = GIMP_TRANSLATE_MODE_VECTORS;
if (! active_item)
{
null_message = _("There is no path to move.");
}
else if (gimp_item_is_position_locked (active_item))
{
locked_message = _("The active path's position is locked.");
}
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
{
active_item = GIMP_ITEM (gimp_image_get_mask (image));
if (gimp_channel_is_empty (GIMP_CHANNEL (active_item)))
active_item = NULL;
translate_mode = GIMP_TRANSLATE_MODE_MASK;
if (! active_item)
{
/* cannot happen, don't translate this message */
null_message = "There is no selection to move.";
}
else if (gimp_item_is_position_locked (active_item))
{
locked_message = "The selection's position is locked.";
}
}
break;
case GIMP_TRANSFORM_TYPE_LAYER:
{
active_item = GIMP_ITEM (gimp_image_get_active_drawable (image));
if (! active_item)
{
null_message = _("There is no layer to move.");
}
else if (GIMP_IS_LAYER_MASK (active_item))
{
translate_mode = GIMP_TRANSLATE_MODE_LAYER_MASK;
if (gimp_item_is_position_locked (active_item))
locked_message = _("The active layer's position is locked.");
else if (gimp_item_is_content_locked (active_item))
locked_message = _("The active layer's pixels are locked.");
}
else if (GIMP_IS_CHANNEL (active_item))
{
translate_mode = GIMP_TRANSLATE_MODE_CHANNEL;
if (gimp_item_is_position_locked (active_item))
locked_message = _("The active channel's position is locked.");
else if (gimp_item_is_content_locked (active_item))
locked_message = _("The active channel's pixels are locked.");
}
else
{
translate_mode = GIMP_TRANSLATE_MODE_LAYER;
if (gimp_item_is_position_locked (active_item))
locked_message = _("The active layer's position is locked.");
}
}
break;
}
if (! active_item)
{
gimp_tool_message_literal (tool, display, null_message);
gimp_widget_blink (options->type_box);
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
return;
}
else if (locked_message)
{
gimp_tool_message_literal (tool, display, locked_message);
gimp_tools_blink_lock_box (display->gimp, active_item);
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
return;
}
gimp_tool_control_activate (tool->control);
gimp_edit_selection_tool_start (tool, display, coords,
translate_mode,
TRUE);
}
static void
gimp_move_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpMoveTool *move = GIMP_MOVE_TOOL (tool);
GimpGuiConfig *config = GIMP_GUI_CONFIG (display->gimp->config);
GimpImage *image = gimp_display_get_image (display);
gboolean flush = FALSE;
gimp_tool_control_halt (tool->control);
if (! config->move_tool_changes_active ||
(release_type == GIMP_BUTTON_RELEASE_CANCEL))
{
if (move->old_active_layer)
{
gimp_image_set_active_layer (image, move->old_active_layer);
move->old_active_layer = NULL;
flush = TRUE;
}
if (move->old_active_vectors)
{
gimp_image_set_active_vectors (image, move->old_active_vectors);
move->old_active_vectors = NULL;
flush = TRUE;
}
}
if (release_type != GIMP_BUTTON_RELEASE_CANCEL)
{
if (move->floating_layer)
{
floating_sel_anchor (move->floating_layer);
flush = TRUE;
}
}
if (flush)
gimp_image_flush (image);
}
static gboolean
gimp_move_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display)
{
GimpMoveOptions *options = GIMP_MOVE_TOOL_GET_OPTIONS (tool);
return gimp_edit_selection_tool_translate (tool, kevent,
options->move_type,
display,
options->type_box);
}
static void
gimp_move_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display)
{
GimpMoveTool *move = GIMP_MOVE_TOOL (tool);
GimpMoveOptions *options = GIMP_MOVE_TOOL_GET_OPTIONS (tool);
if (key == gimp_get_extend_selection_mask ())
{
g_object_set (options, "move-current", ! options->move_current, NULL);
}
else if (key == GDK_MOD1_MASK ||
key == gimp_get_toggle_behavior_mask ())
{
GimpTransformType button_type;
button_type = options->move_type;
if (press)
{
if (key == (state & (GDK_MOD1_MASK |
gimp_get_toggle_behavior_mask ())))
{
/* first modifier pressed */
move->saved_type = options->move_type;
}
}
else
{
if (! (state & (GDK_MOD1_MASK |
gimp_get_toggle_behavior_mask ())))
{
/* last modifier released */
button_type = move->saved_type;
}
}
if (state & GDK_MOD1_MASK)
{
button_type = GIMP_TRANSFORM_TYPE_SELECTION;
}
else if (state & gimp_get_toggle_behavior_mask ())
{
button_type = GIMP_TRANSFORM_TYPE_PATH;
}
if (button_type != options->move_type)
{
g_object_set (options, "move-type", button_type, NULL);
}
}
}
static void
gimp_move_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpMoveTool *move = GIMP_MOVE_TOOL (tool);
GimpMoveOptions *options = GIMP_MOVE_TOOL_GET_OPTIONS (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GimpGuide *guide = NULL;
if (options->move_type == GIMP_TRANSFORM_TYPE_LAYER &&
! options->move_current &&
gimp_display_shell_get_show_guides (shell) &&
proximity)
{
gint snap_distance = display->config->snap_distance;
guide = gimp_image_pick_guide (image, coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance));
}
if (move->guide != guide)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
gimp_draw_tool_pause (draw_tool);
if (gimp_draw_tool_is_active (draw_tool) &&
draw_tool->display != display)
gimp_draw_tool_stop (draw_tool);
move->guide = guide;
if (! gimp_draw_tool_is_active (draw_tool))
gimp_draw_tool_start (draw_tool, display);
gimp_draw_tool_resume (draw_tool);
}
}
static void
gimp_move_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpMoveOptions *options = GIMP_MOVE_TOOL_GET_OPTIONS (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GimpCursorType cursor = GIMP_CURSOR_MOUSE;
GimpToolCursorType tool_cursor = GIMP_TOOL_CURSOR_MOVE;
GimpCursorModifier modifier = GIMP_CURSOR_MODIFIER_NONE;
gint snap_distance = display->config->snap_distance;
if (options->move_type == GIMP_TRANSFORM_TYPE_PATH)
{
tool_cursor = GIMP_TOOL_CURSOR_PATHS;
modifier = GIMP_CURSOR_MODIFIER_MOVE;
if (options->move_current)
{
GimpItem *item = GIMP_ITEM (gimp_image_get_active_vectors (image));
if (! item || gimp_item_is_position_locked (item))
modifier = GIMP_CURSOR_MODIFIER_BAD;
}
else
{
if (gimp_image_pick_vectors (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance)))
{
tool_cursor = GIMP_TOOL_CURSOR_HAND;
}
else
{
modifier = GIMP_CURSOR_MODIFIER_BAD;
}
}
}
else if (options->move_type == GIMP_TRANSFORM_TYPE_SELECTION)
{
tool_cursor = GIMP_TOOL_CURSOR_RECT_SELECT;
modifier = GIMP_CURSOR_MODIFIER_MOVE;
if (gimp_channel_is_empty (gimp_image_get_mask (image)))
modifier = GIMP_CURSOR_MODIFIER_BAD;
}
else if (options->move_current)
{
GimpItem *item = GIMP_ITEM (gimp_image_get_active_drawable (image));
if (! item || gimp_item_is_position_locked (item))
modifier = GIMP_CURSOR_MODIFIER_BAD;
}
else
{
GimpLayer *layer;
if (gimp_display_shell_get_show_guides (shell) &&
gimp_image_pick_guide (image, coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance)))
{
tool_cursor = GIMP_TOOL_CURSOR_HAND;
modifier = GIMP_CURSOR_MODIFIER_MOVE;
}
else if ((layer = gimp_image_pick_layer (image,
coords->x, coords->y,
NULL)))
{
/* if there is a floating selection, and this aint it... */
if (gimp_image_get_floating_selection (image) &&
! gimp_layer_is_floating_sel (layer))
{
tool_cursor = GIMP_TOOL_CURSOR_MOVE;
modifier = GIMP_CURSOR_MODIFIER_ANCHOR;
}
else if (gimp_item_is_position_locked (GIMP_ITEM (layer)))
{
modifier = GIMP_CURSOR_MODIFIER_BAD;
}
else if (layer != gimp_image_get_active_layer (image))
{
tool_cursor = GIMP_TOOL_CURSOR_HAND;
modifier = GIMP_CURSOR_MODIFIER_MOVE;
}
}
else
{
modifier = GIMP_CURSOR_MODIFIER_BAD;
}
}
gimp_tool_control_set_cursor (tool->control, cursor);
gimp_tool_control_set_tool_cursor (tool->control, tool_cursor);
gimp_tool_control_set_cursor_modifier (tool->control, modifier);
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static void
gimp_move_tool_draw (GimpDrawTool *draw_tool)
{
GimpMoveTool *move = GIMP_MOVE_TOOL (draw_tool);
if (move->guide)
{
GimpCanvasItem *item;
GimpGuideStyle style;
style = gimp_guide_get_style (move->guide);
item = gimp_draw_tool_add_guide (draw_tool,
gimp_guide_get_orientation (move->guide),
gimp_guide_get_position (move->guide),
style);
gimp_canvas_item_set_highlight (item, TRUE);
}
}
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