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gimp/app/tools/gimpmovetool.c

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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/gimp-utils.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_finalize (GObject *object);
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)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
object_class->finalize = gimp_move_tool_finalize;
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->guides = NULL;
move_tool->saved_type = GIMP_TRANSFORM_TYPE_LAYER;
move_tool->old_selected_layers = NULL;
move_tool->old_selected_vectors = NULL;
}
static void
gimp_move_tool_finalize (GObject *object)
{
GimpMoveTool *move = GIMP_MOVE_TOOL (object);
g_clear_pointer (&move->guides, g_list_free);
g_clear_pointer (&move->old_selected_layers, g_list_free);
g_clear_pointer (&move->old_selected_vectors, g_list_free);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
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;
GList *selected_items = NULL;
GList *iter;
GimpTranslateMode translate_mode = GIMP_TRANSLATE_MODE_MASK;
const gchar *null_message = NULL;
const gchar *locked_message = NULL;
tool->display = display;
move->floating_layer = NULL;
g_clear_pointer (&move->guides, g_list_free);
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)
{
GList *new_selected_vectors = g_list_prepend (NULL, vectors);
move->old_selected_vectors =
g_list_copy (gimp_image_get_selected_vectors (image));
gimp_image_set_selected_vectors (image, new_selected_vectors);
g_list_free (new_selected_vectors);
}
else
{
/* no path picked */
return;
}
}
else if (options->move_type == GIMP_TRANSFORM_TYPE_LAYER)
{
GList *guides;
GimpLayer *layer;
if (gimp_display_shell_get_show_guides (shell) &&
(guides = gimp_image_pick_guides (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance))))
{
move->guides = guides;
gimp_guide_tool_start_edit_many (tool, display, guides);
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
{
GList *new_selected_layers = g_list_prepend (NULL, layer);
move->old_selected_layers = g_list_copy (gimp_image_get_selected_layers (image));
gimp_image_set_selected_layers (image, new_selected_layers);
g_list_free (new_selected_layers);
}
}
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:
{
selected_items = gimp_image_get_selected_drawables (image);
if (! selected_items)
{
null_message = _("There is no layer to move.");
}
else if (GIMP_IS_LAYER_MASK (selected_items->data))
{
g_return_if_fail (g_list_length (selected_items) == 1);
translate_mode = GIMP_TRANSLATE_MODE_LAYER_MASK;
if (gimp_item_is_position_locked (selected_items->data))
locked_message = _("The selected layer's position is locked.");
else if (gimp_item_is_content_locked (selected_items->data))
locked_message = _("The selected layer's pixels are locked.");
}
else if (GIMP_IS_CHANNEL (selected_items->data))
{
gint n_items = 0;
translate_mode = GIMP_TRANSLATE_MODE_CHANNEL;
for (iter = selected_items; iter; iter = iter->next)
if (! gimp_item_is_position_locked (iter->data) &&
! gimp_item_is_content_locked (iter->data))
n_items++;
if (n_items == 0)
locked_message = _("All selected channels' positions or pixels are locked.");
}
else
{
gint n_items = 0;
translate_mode = GIMP_TRANSLATE_MODE_LAYER;
for (iter = selected_items; iter; iter = iter->next)
if (! gimp_item_is_position_locked (iter->data))
n_items++;
if (n_items == 0)
locked_message = _("All selected layers' positions are locked.");
}
}
break;
case GIMP_TRANSFORM_TYPE_IMAGE:
g_return_if_reached ();
}
if (! active_item && ! selected_items)
{
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 ? active_item : selected_items->data);
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
g_list_free (selected_items);
return;
}
gimp_tool_control_activate (tool->control);
gimp_edit_selection_tool_start (tool, display, coords,
translate_mode,
TRUE);
g_list_free (selected_items);
}
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_selected_layers)
{
gimp_image_set_selected_layers (image, move->old_selected_layers);
g_clear_pointer (&move->old_selected_layers, g_list_free);
flush = TRUE;
}
if (move->old_selected_vectors)
{
gimp_image_set_selected_vectors (image, move->old_selected_vectors);
g_clear_pointer (&move->old_selected_vectors, g_list_free);
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);
GList *guides = 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;
guides = gimp_image_pick_guides (image, coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance));
}
if (gimp_g_list_compare (guides, move->guides))
{
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);
g_clear_pointer (&move->guides, g_list_free);
move->guides = guides;
if (! gimp_draw_tool_is_active (draw_tool))
gimp_draw_tool_start (draw_tool, display);
gimp_draw_tool_resume (draw_tool);
}
else
{
g_list_free (guides);
}
}
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)
{
GList *items = gimp_image_get_selected_drawables (image);
GList *iter;
gint n_items = 0;
for (iter = items; iter; iter = iter->next)
if (! gimp_item_is_position_locked (iter->data))
n_items++;
if (n_items == 0)
modifier = GIMP_CURSOR_MODIFIER_BAD;
g_list_free (items);
}
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 (! g_list_find (gimp_image_get_selected_layers (image), layer))
{
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);
GList *iter;
for (iter = move->guides; iter; iter = g_list_next (iter))
{
GimpGuide *guide = iter->data;
GimpCanvasItem *item;
GimpGuideStyle style;
style = gimp_guide_get_style (guide);
item = gimp_draw_tool_add_guide (draw_tool,
gimp_guide_get_orientation (guide),
gimp_guide_get_position (guide),
style);
gimp_canvas_item_set_highlight (item, TRUE);
}
}
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