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PIKApp/app/tools/pikaaligntool.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libpikamath/pikamath.h"
#include "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "config/pikadisplayconfig.h"
#include "core/pika.h"
#include "core/pikaguide.h"
#include "core/pikaimage.h"
#include "core/pikaimage-arrange.h"
#include "core/pikaimage-pick-item.h"
#include "core/pikaimage-undo.h"
#include "core/pikalayer.h"
#include "core/pikapickable.h"
#include "core/pikapickable-auto-shrink.h"
#include "vectors/pikavectors.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikawidgets-utils.h"
#include "display/pikacanvasitem.h"
#include "display/pikadisplay.h"
#include "display/pikadisplayshell.h"
#include "display/pikadisplayshell-appearance.h"
#include "pikaalignoptions.h"
#include "pikaaligntool.h"
#include "pikatoolcontrol.h"
#include "pika-intl.h"
#define EPSILON 3 /* move distance after which we do a box-select */
/* local function prototypes */
static void pika_align_tool_constructed (GObject *object);
static void pika_align_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display);
static void pika_align_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display);
static void pika_align_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display);
static void pika_align_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display);
static gboolean pika_align_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display);
static void pika_align_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display);
static void pika_align_tool_status_update (PikaTool *tool,
PikaDisplay *display,
GdkModifierType state,
gboolean proximity);
static void pika_align_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display);
const gchar * pika_align_tool_can_undo (PikaTool *tool,
PikaDisplay *display);
static gboolean pika_align_tool_undo (PikaTool *tool,
PikaDisplay *display);
static void pika_align_tool_draw (PikaDrawTool *draw_tool);
static void pika_align_tool_redraw (PikaAlignTool *align_tool);
static void pika_align_tool_align (PikaAlignTool *align_tool,
PikaAlignmentType align_type);
static gint pika_align_tool_undo_idle (gpointer data);
static void pika_align_tool_display_changed (PikaContext *context,
PikaDisplay *display,
PikaAlignTool *align_tool);
G_DEFINE_TYPE (PikaAlignTool, pika_align_tool, PIKA_TYPE_DRAW_TOOL)
#define parent_class pika_align_tool_parent_class
void
pika_align_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
(* callback) (PIKA_TYPE_ALIGN_TOOL,
PIKA_TYPE_ALIGN_OPTIONS,
pika_align_options_gui,
0,
"pika-align-tool",
_("Align and Distribute"),
_("Alignment Tool: Align or arrange layers and other objects"),
N_("_Align and Distribute"), "Q",
NULL, PIKA_HELP_TOOL_ALIGN,
PIKA_ICON_TOOL_ALIGN,
data);
}
static void
pika_align_tool_class_init (PikaAlignToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
PikaDrawToolClass *draw_tool_class = PIKA_DRAW_TOOL_CLASS (klass);
object_class->constructed = pika_align_tool_constructed;
tool_class->control = pika_align_tool_control;
tool_class->button_press = pika_align_tool_button_press;
tool_class->button_release = pika_align_tool_button_release;
tool_class->motion = pika_align_tool_motion;
tool_class->key_press = pika_align_tool_key_press;
tool_class->oper_update = pika_align_tool_oper_update;
tool_class->cursor_update = pika_align_tool_cursor_update;
tool_class->can_undo = pika_align_tool_can_undo;
tool_class->undo = pika_align_tool_undo;
draw_tool_class->draw = pika_align_tool_draw;
}
static void
pika_align_tool_init (PikaAlignTool *align_tool)
{
PikaTool *tool = PIKA_TOOL (align_tool);
pika_tool_control_set_snap_to (tool->control, FALSE);
pika_tool_control_set_precision (tool->control,
PIKA_CURSOR_PRECISION_PIXEL_BORDER);
pika_tool_control_set_tool_cursor (tool->control, PIKA_TOOL_CURSOR_MOVE);
align_tool->function = ALIGN_TOOL_REF_IDLE;
}
static void
pika_align_tool_constructed (GObject *object)
{
PikaAlignTool *align_tool = PIKA_ALIGN_TOOL (object);
PikaAlignOptions *options;
G_OBJECT_CLASS (parent_class)->constructed (object);
options = PIKA_ALIGN_TOOL_GET_OPTIONS (align_tool);
g_signal_connect_object (options, "align-button-clicked",
G_CALLBACK (pika_align_tool_align),
align_tool, G_CONNECT_SWAPPED);
g_signal_connect_object (options, "notify::align-reference",
G_CALLBACK (pika_align_tool_redraw),
align_tool, G_CONNECT_SWAPPED);
g_signal_connect_object (options, "notify::align-contents",
G_CALLBACK (pika_align_tool_redraw),
align_tool, G_CONNECT_SWAPPED);
g_signal_connect_object (pika_get_user_context (PIKA_CONTEXT (options)->pika),
"display-changed",
G_CALLBACK (pika_align_tool_display_changed),
align_tool, 0);
}
static void
pika_align_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display)
{
switch (action)
{
case PIKA_TOOL_ACTION_PAUSE:
case PIKA_TOOL_ACTION_RESUME:
break;
case PIKA_TOOL_ACTION_HALT:
break;
case PIKA_TOOL_ACTION_COMMIT:
break;
}
PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
pika_align_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display)
{
PikaAlignTool *align_tool = PIKA_ALIGN_TOOL (tool);
pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
/* If the tool was being used in another image... reset it */
if (display != tool->display)
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, display);
tool->display = display;
pika_tool_control_activate (tool->control);
align_tool->x2 = align_tool->x1 = coords->x;
align_tool->y2 = align_tool->y1 = coords->y;
if (! pika_draw_tool_is_active (PIKA_DRAW_TOOL (tool)))
pika_draw_tool_start (PIKA_DRAW_TOOL (tool), display);
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
}
/* some rather complex logic here. If the user clicks without modifiers,
* then we start a new list, and use the first object in it as reference.
* If the user clicks using Shift, or draws a rubber-band box, then
* we add objects to the list, but do not specify which one should
* be used as reference.
*/
static void
pika_align_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display)
{
PikaAlignTool *align_tool = PIKA_ALIGN_TOOL (tool);
PikaAlignOptions *options = PIKA_ALIGN_TOOL_GET_OPTIONS (tool);
PikaDisplayShell *shell = pika_display_get_shell (display);
PikaImage *image = pika_display_get_image (display);
GdkModifierType extend_mask;
extend_mask = pika_get_extend_selection_mask ();
pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
pika_tool_control_halt (tool->control);
if (release_type == PIKA_BUTTON_RELEASE_CANCEL)
{
align_tool->x2 = align_tool->x1;
align_tool->y2 = align_tool->y1;
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
return;
}
if (state & GDK_MOD1_MASK)
{
PikaGuide *guide = NULL;
if (pika_display_shell_get_show_guides (shell))
{
gint snap_distance = display->config->snap_distance;
guide = pika_image_pick_guide (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance));
}
pika_align_options_pick_guide (options, guide, (gboolean) state & extend_mask);
}
else
{
GObject *object = NULL;
/* Check if a layer is fully included in the rubber-band rectangle.
* Don't verify for too small rectangles.
*/
/* FIXME: look for vectors too */
if (hypot (coords->x - align_tool->x1,
coords->y - align_tool->y1) > EPSILON)
{
gint X0 = MIN (coords->x, align_tool->x1);
gint X1 = MAX (coords->x, align_tool->x1);
gint Y0 = MIN (coords->y, align_tool->y1);
gint Y1 = MAX (coords->y, align_tool->y1);
GList *all_layers;
GList *list;
all_layers = pika_image_get_layer_list (image);
for (list = all_layers; list; list = g_list_next (list))
{
PikaLayer *layer = list->data;
gint x0, y0, x1, y1;
if (! pika_item_get_visible (PIKA_ITEM (layer)))
continue;
pika_item_get_offset (PIKA_ITEM (layer), &x0, &y0);
x1 = x0 + pika_item_get_width (PIKA_ITEM (layer));
y1 = y0 + pika_item_get_height (PIKA_ITEM (layer));
if (x0 < X0 || y0 < Y0 || x1 > X1 || y1 > Y1)
continue;
object = G_OBJECT (layer);
break;
}
g_list_free (all_layers);
}
if (object == NULL)
{
PikaVectors *vectors;
PikaGuide *guide;
PikaLayer *layer;
GObject *previously_picked;
gint snap_distance = display->config->snap_distance;
previously_picked = pika_align_options_get_reference (options, FALSE);
if ((vectors = pika_image_pick_vectors (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance))))
{
object = G_OBJECT (vectors);
}
else if (pika_display_shell_get_show_guides (shell) &&
(guide = pika_image_pick_guide (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance))))
{
object = G_OBJECT (guide);
}
else if ((layer = pika_image_pick_layer (image, coords->x, coords->y,
previously_picked && PIKA_IS_LAYER (previously_picked)? PIKA_LAYER (previously_picked) : NULL)))
{
object = G_OBJECT (layer);
}
}
if (object)
pika_align_options_pick_reference (options, object);
}
align_tool->x2 = align_tool->x1;
align_tool->y2 = align_tool->y1;
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
}
static void
pika_align_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display)
{
PikaAlignTool *align_tool = PIKA_ALIGN_TOOL (tool);
pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
align_tool->x2 = coords->x;
align_tool->y2 = coords->y;
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
}
static gboolean
pika_align_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display)
{
if (display == tool->display)
{
switch (kevent->keyval)
{
case GDK_KEY_Escape:
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, display);
return TRUE;
default:
break;
}
}
return FALSE;
}
static void
pika_align_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display)
{
PikaAlignTool *align_tool = PIKA_ALIGN_TOOL (tool);
PikaAlignOptions *options = PIKA_ALIGN_TOOL_GET_OPTIONS (align_tool);
PikaDisplayShell *shell = pika_display_get_shell (display);
PikaImage *image = pika_display_get_image (display);
gint snap_distance = display->config->snap_distance;
state &= pika_get_all_modifiers_mask ();
align_tool->function = ALIGN_TOOL_NO_ACTION;
if (pika_image_pick_vectors (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance)))
{
if (options->align_reference == PIKA_ALIGN_REFERENCE_PICK)
align_tool->function = ALIGN_TOOL_REF_PICK_PATH;
}
else if (pika_display_shell_get_show_guides (shell) &&
pika_image_pick_guide (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance)))
{
if (state == (pika_get_extend_selection_mask () | GDK_MOD1_MASK))
align_tool->function = ALIGN_TOOL_ALIGN_ADD_GUIDE;
else if (state == GDK_MOD1_MASK)
align_tool->function = ALIGN_TOOL_ALIGN_PICK_GUIDE;
else if (options->align_reference == PIKA_ALIGN_REFERENCE_PICK)
align_tool->function = ALIGN_TOOL_REF_PICK_GUIDE;
}
else if (pika_image_pick_layer_by_bounds (image, coords->x, coords->y))
{
if (options->align_reference == PIKA_ALIGN_REFERENCE_PICK)
align_tool->function = ALIGN_TOOL_REF_PICK_LAYER;
}
else
{
if (state & GDK_MOD1_MASK)
align_tool->function = ALIGN_TOOL_ALIGN_IDLE;
else if (options->align_reference == PIKA_ALIGN_REFERENCE_PICK)
align_tool->function = ALIGN_TOOL_REF_IDLE;
}
pika_align_tool_status_update (tool, display, state, proximity);
if (! pika_draw_tool_is_active (PIKA_DRAW_TOOL (tool)))
pika_draw_tool_start (PIKA_DRAW_TOOL (tool), display);
}
static void
pika_align_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display)
{
PikaAlignTool *align_tool = PIKA_ALIGN_TOOL (tool);
PikaToolCursorType tool_cursor = PIKA_TOOL_CURSOR_NONE;
PikaCursorModifier modifier = PIKA_CURSOR_MODIFIER_NONE;
switch (align_tool->function)
{
case ALIGN_TOOL_REF_IDLE:
case ALIGN_TOOL_ALIGN_IDLE:
tool_cursor = PIKA_TOOL_CURSOR_RECT_SELECT;
break;
case ALIGN_TOOL_REF_PICK_LAYER:
tool_cursor = PIKA_TOOL_CURSOR_HAND;
break;
case ALIGN_TOOL_ALIGN_ADD_GUIDE:
modifier = PIKA_CURSOR_MODIFIER_PLUS;
case ALIGN_TOOL_REF_PICK_GUIDE:
case ALIGN_TOOL_ALIGN_PICK_GUIDE:
tool_cursor = PIKA_TOOL_CURSOR_MOVE;
break;
case ALIGN_TOOL_REF_PICK_PATH:
tool_cursor = PIKA_TOOL_CURSOR_PATHS;
break;
case ALIGN_TOOL_REF_DRAG_BOX:
case ALIGN_TOOL_NO_ACTION:
break;
}
pika_tool_control_set_cursor (tool->control, PIKA_CURSOR_MOUSE);
pika_tool_control_set_tool_cursor (tool->control, tool_cursor);
pika_tool_control_set_cursor_modifier (tool->control, modifier);
PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
const gchar *
pika_align_tool_can_undo (PikaTool *tool,
PikaDisplay *display)
{
return _("Arrange Objects");
}
static gboolean
pika_align_tool_undo (PikaTool *tool,
PikaDisplay *display)
{
g_idle_add ((GSourceFunc) pika_align_tool_undo_idle, (gpointer) tool);
return FALSE;
}
static void
pika_align_tool_status_update (PikaTool *tool,
PikaDisplay *display,
GdkModifierType state,
gboolean proximity)
{
PikaAlignTool *align_tool = PIKA_ALIGN_TOOL (tool);
gchar *status = NULL;
GdkModifierType extend_mask;
extend_mask = pika_get_extend_selection_mask ();
pika_tool_pop_status (tool, display);
if (proximity)
{
switch (align_tool->function)
{
case ALIGN_TOOL_REF_IDLE:
status = g_strdup (_("Click on a layer, path or guide, "
"or Click-Drag to pick a reference"));
break;
case ALIGN_TOOL_REF_PICK_LAYER:
status = g_strdup (_("Click to pick this layer as reference"));
break;
case ALIGN_TOOL_REF_PICK_GUIDE:
status = pika_suggest_modifiers (_("Click to pick this guide as reference"),
GDK_MOD1_MASK & ~state,
NULL, NULL, NULL);
break;
case ALIGN_TOOL_REF_PICK_PATH:
status = g_strdup (_("Click to pick this path as reference"));
break;
case ALIGN_TOOL_REF_DRAG_BOX:
break;
case ALIGN_TOOL_ALIGN_IDLE:
status = g_strdup (_("Click on a guide to add it to objects to align, "
"click anywhere else to unselect all guides"));
break;
case ALIGN_TOOL_ALIGN_PICK_GUIDE:
status = pika_suggest_modifiers (_("Click to select this guide for alignment"),
extend_mask & ~state,
NULL, NULL, NULL);
break;
case ALIGN_TOOL_ALIGN_ADD_GUIDE:
status = g_strdup (_("Click to add this guide to the list of objects to align"));
break;
case ALIGN_TOOL_NO_ACTION:
break;
}
}
if (status)
{
pika_tool_push_status (tool, display, "%s", status);
g_free (status);
}
}
static void
pika_align_tool_draw (PikaDrawTool *draw_tool)
{
PikaAlignTool *align_tool = PIKA_ALIGN_TOOL (draw_tool);
PikaAlignOptions *options = PIKA_ALIGN_TOOL_GET_OPTIONS (align_tool);
GObject *reference;
GList *objects;
GList *iter;
gint x, y, w, h;
/* draw rubber-band rectangle */
x = MIN (align_tool->x2, align_tool->x1);
y = MIN (align_tool->y2, align_tool->y1);
w = MAX (align_tool->x2, align_tool->x1) - x;
h = MAX (align_tool->y2, align_tool->y1) - y;
if (w != 0 && h != 0)
pika_draw_tool_add_rectangle (draw_tool, FALSE, x, y, w, h);
/* Draw handles on the reference object. */
reference = pika_align_options_get_reference (options, FALSE);
if (PIKA_IS_ITEM (reference))
{
PikaItem *item = PIKA_ITEM (reference);
gint off_x, off_y;
pika_item_bounds (item, &x, &y, &w, &h);
pika_item_get_offset (item, &off_x, &off_y);
x += off_x;
y += off_y;
if (pika_align_options_align_contents (options))
{
gint shrunk_x;
gint shrunk_y;
if (pika_pickable_auto_shrink (PIKA_PICKABLE (reference),
0, 0,
pika_item_get_width (PIKA_ITEM (reference)),
pika_item_get_height (PIKA_ITEM (reference)),
&shrunk_x, &shrunk_y, &w, &h) == PIKA_AUTO_SHRINK_SHRINK)
{
x += shrunk_x;
y += shrunk_y;
}
}
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
x, y,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_NORTH_WEST);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
x + w, y,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_NORTH_EAST);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
x, y + h,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_SOUTH_WEST);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
x + w, y + h,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_SOUTH_EAST);
}
else if (PIKA_IS_GUIDE (reference))
{
PikaGuide *guide = PIKA_GUIDE (reference);
PikaImage *image = pika_display_get_image (draw_tool->display);
gint x, y;
gint w, h;
switch (pika_guide_get_orientation (guide))
{
case PIKA_ORIENTATION_VERTICAL:
x = pika_guide_get_position (guide);
h = pika_image_get_height (image);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
x, h,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_SOUTH);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
x, 0,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_NORTH);
break;
case PIKA_ORIENTATION_HORIZONTAL:
y = pika_guide_get_position (guide);
w = pika_image_get_width (image);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
w, y,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_EAST);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
0, y,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_WEST);
break;
default:
break;
}
}
else if (PIKA_IS_IMAGE (reference))
{
PikaImage *image = PIKA_IMAGE (reference);
gint width = pika_image_get_width (image);
gint height = pika_image_get_height (image);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
0, 0,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_NORTH_WEST);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
width, 0,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_NORTH_EAST);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
0, height,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_SOUTH_WEST);
pika_draw_tool_add_handle (draw_tool, PIKA_HANDLE_FILLED_SQUARE,
width, height,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_TOOL_HANDLE_SIZE_SMALL,
PIKA_HANDLE_ANCHOR_SOUTH_EAST);
}
/* Highlight picked guides, similarly to how they are highlighted in Move
* tool.
*/
objects = pika_align_options_get_objects (options);
for (iter = objects; iter; iter = iter->next)
{
if (PIKA_IS_GUIDE (iter->data))
{
PikaGuide *guide = iter->data;
PikaCanvasItem *item;
PikaGuideStyle style;
style = pika_guide_get_style (guide);
item = pika_draw_tool_add_guide (draw_tool,
pika_guide_get_orientation (guide),
pika_guide_get_position (guide),
style);
pika_canvas_item_set_highlight (item, TRUE);
}
}
}
static void
pika_align_tool_redraw (PikaAlignTool *align_tool)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (align_tool);
pika_draw_tool_pause (draw_tool);
if (! pika_draw_tool_is_active (draw_tool) && draw_tool->display)
pika_draw_tool_start (draw_tool, draw_tool->display);
pika_draw_tool_resume (draw_tool);
}
static void
pika_align_tool_align (PikaAlignTool *align_tool,
PikaAlignmentType align_type)
{
PikaAlignOptions *options = PIKA_ALIGN_TOOL_GET_OPTIONS (align_tool);
PikaImage *image;
GObject *reference_object = NULL;
GList *objects;
GList *list;
gdouble align_x = 0.0;
gdouble align_y = 0.0;
/* if nothing is selected, just return */
objects = pika_align_options_get_objects (options);
if (! objects)
return;
image = pika_context_get_image (pika_get_user_context (PIKA_CONTEXT (options)->pika));
list = objects;
if (align_type < PIKA_ARRANGE_HFILL)
{
reference_object = pika_align_options_get_reference (options, TRUE);
if (! reference_object)
return;
}
pika_draw_tool_pause (PIKA_DRAW_TOOL (align_tool));
pika_align_options_get_pivot (options, &align_x, &align_y);
pika_image_arrange_objects (image, list,
align_x, align_y,
reference_object,
align_type,
pika_align_options_align_contents (options));
pika_draw_tool_resume (PIKA_DRAW_TOOL (align_tool));
pika_image_flush (image);
g_list_free (objects);
}
static gint
pika_align_tool_undo_idle (gpointer data)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (data);
PikaDisplay *display = draw_tool->display;
/* This makes sure that we properly undraw then redraw the various handles and
* highlighted guides after undoing.
*/
pika_draw_tool_stop (draw_tool);
pika_draw_tool_start (draw_tool, display);
return FALSE; /* remove idle */
}
static void
pika_align_tool_display_changed (PikaContext *context,
PikaDisplay *display,
PikaAlignTool *align_tool)
{
PikaTool *tool = PIKA_TOOL (align_tool);
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (align_tool);
pika_draw_tool_pause (draw_tool);
if (display != tool->display)
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, display);
tool->display = display;
if (! pika_draw_tool_is_active (draw_tool) && display)
pika_draw_tool_start (draw_tool, display);
pika_draw_tool_resume (draw_tool);
}
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