PIKApp/app/tools/pikaguidetool.c

543 lines
18 KiB
C

/* 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 "libpikamath/pikamath.h"
#include "tools-types.h"
#include "core/pika.h"
#include "core/pikaguide.h"
#include "core/pikaimage.h"
#include "core/pikaimage-guides.h"
#include "core/pikaimage-undo.h"
#include "display/pikadisplay.h"
#include "display/pikadisplayshell.h"
#include "display/pikadisplayshell-selection.h"
#include "display/pikadisplayshell-transform.h"
#include "pikaguidetool.h"
#include "pikatoolcontrol.h"
#include "tool_manager.h"
#include "pika-intl.h"
#define SWAP_ORIENT(orient) ((orient) == PIKA_ORIENTATION_HORIZONTAL ? \
PIKA_ORIENTATION_VERTICAL : \
PIKA_ORIENTATION_HORIZONTAL)
/* local function prototypes */
static void pika_guide_tool_finalize (GObject *object);
static void pika_guide_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display);
static void pika_guide_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display);
static void pika_guide_tool_draw (PikaDrawTool *draw_tool);
static void pika_guide_tool_start (PikaTool *parent_tool,
PikaDisplay *display,
GList *guides,
PikaOrientationType orientation);
static void pika_guide_tool_push_status (PikaGuideTool *guide_tool,
PikaDisplay *display,
gboolean remove_guides);
G_DEFINE_TYPE (PikaGuideTool, pika_guide_tool, PIKA_TYPE_DRAW_TOOL)
#define parent_class pika_guide_tool_parent_class
static void
pika_guide_tool_class_init (PikaGuideToolClass *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->finalize = pika_guide_tool_finalize;
tool_class->button_release = pika_guide_tool_button_release;
tool_class->motion = pika_guide_tool_motion;
draw_tool_class->draw = pika_guide_tool_draw;
}
static void
pika_guide_tool_init (PikaGuideTool *guide_tool)
{
PikaTool *tool = PIKA_TOOL (guide_tool);
pika_tool_control_set_snap_to (tool->control, FALSE);
pika_tool_control_set_handle_empty_image (tool->control, TRUE);
pika_tool_control_set_tool_cursor (tool->control,
PIKA_TOOL_CURSOR_MOVE);
pika_tool_control_set_scroll_lock (tool->control, TRUE);
pika_tool_control_set_precision (tool->control,
PIKA_CURSOR_PRECISION_PIXEL_BORDER);
guide_tool->guides = NULL;
guide_tool->n_guides = 0;
}
static void
pika_guide_tool_finalize (GObject *object)
{
PikaGuideTool *guide_tool = PIKA_GUIDE_TOOL (object);
gint i;
for (i = 0; i < guide_tool->n_guides; i++)
g_clear_object (&guide_tool->guides[i].guide);
g_free (guide_tool->guides);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_guide_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display)
{
PikaGuideTool *guide_tool = PIKA_GUIDE_TOOL (tool);
PikaDisplayShell *shell = pika_display_get_shell (display);
PikaImage *image = pika_display_get_image (display);
gint i;
pika_tool_pop_status (tool, display);
pika_tool_control_halt (tool->control);
pika_draw_tool_stop (PIKA_DRAW_TOOL (tool));
if (release_type == PIKA_BUTTON_RELEASE_CANCEL)
{
for (i = 0; i < guide_tool->n_guides; i++)
{
PikaGuideToolGuide *guide = &guide_tool->guides[i];
/* custom guides are moved live */
if (guide->custom)
{
pika_image_move_guide (image, guide->guide, guide->old_position,
TRUE);
}
}
}
else
{
gint n_non_custom_guides = 0;
gboolean remove_guides = FALSE;
for (i = 0; i < guide_tool->n_guides; i++)
{
PikaGuideToolGuide *guide = &guide_tool->guides[i];
n_non_custom_guides += ! guide->custom;
if (guide->position == PIKA_GUIDE_POSITION_UNDEFINED)
{
remove_guides = TRUE;
}
}
if (n_non_custom_guides > 1)
{
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_GUIDE,
remove_guides ?
C_("undo-type", "Remove Guides") :
C_("undo-type", "Move Guides"));
}
for (i = 0; i < guide_tool->n_guides; i++)
{
PikaGuideToolGuide *guide = &guide_tool->guides[i];
if (remove_guides)
{
/* removing a guide can cause other guides to be removed as well
* (in particular, in case of symmetry guides). these guides
* will be kept alive, since we hold a reference on them, but we
* need to make sure that they're still part of the image.
*/
if (g_list_find (pika_image_get_guides (image), guide->guide))
pika_image_remove_guide (image, guide->guide, TRUE);
}
else
{
if (guide->guide)
{
/* custom guides are moved live */
if (! guide->custom)
{
pika_image_move_guide (image, guide->guide,
guide->position, TRUE);
}
}
else
{
switch (guide->orientation)
{
case PIKA_ORIENTATION_HORIZONTAL:
pika_image_add_hguide (image,
guide->position,
TRUE);
break;
case PIKA_ORIENTATION_VERTICAL:
pika_image_add_vguide (image,
guide->position,
TRUE);
break;
default:
pika_assert_not_reached ();
}
}
}
}
if (n_non_custom_guides > 1)
pika_image_undo_group_end (image);
pika_image_flush (image);
}
pika_display_shell_selection_resume (shell);
tool_manager_pop_tool (display->pika);
g_object_unref (guide_tool);
{
PikaTool *active_tool = tool_manager_get_active (display->pika);
if (PIKA_IS_DRAW_TOOL (active_tool))
pika_draw_tool_pause (PIKA_DRAW_TOOL (active_tool));
tool_manager_oper_update_active (display->pika, coords, state,
TRUE, display);
tool_manager_cursor_update_active (display->pika, coords, state,
display);
if (PIKA_IS_DRAW_TOOL (active_tool))
pika_draw_tool_resume (PIKA_DRAW_TOOL (active_tool));
}
}
static void
pika_guide_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display)
{
PikaGuideTool *guide_tool = PIKA_GUIDE_TOOL (tool);
PikaDisplayShell *shell = pika_display_get_shell (display);
PikaImage *image = pika_display_get_image (display);
gboolean remove_guides = FALSE;
gint tx, ty;
gint i;
pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
pika_display_shell_transform_xy (shell,
coords->x, coords->y,
&tx, &ty);
for (i = 0; i < guide_tool->n_guides; i++)
{
PikaGuideToolGuide *guide = &guide_tool->guides[i];
gint max_position;
gint position;
if (guide->orientation == PIKA_ORIENTATION_HORIZONTAL)
max_position = pika_image_get_height (image);
else
max_position = pika_image_get_width (image);
if (guide->orientation == PIKA_ORIENTATION_HORIZONTAL)
guide->position = RINT (coords->y);
else
guide->position = RINT (coords->x);
position = CLAMP (guide->position, 0, max_position);
if (tx < 0 || tx >= shell->disp_width ||
ty < 0 || ty >= shell->disp_height)
{
guide->position = PIKA_GUIDE_POSITION_UNDEFINED;
remove_guides = TRUE;
}
else
{
if (guide->position < 0 || guide->position > max_position)
remove_guides = TRUE;
}
/* custom guides are moved live */
if (guide->custom)
pika_image_move_guide (image, guide->guide, position, TRUE);
}
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
pika_tool_pop_status (tool, display);
pika_guide_tool_push_status (guide_tool, display, remove_guides);
}
static void
pika_guide_tool_draw (PikaDrawTool *draw_tool)
{
PikaGuideTool *guide_tool = PIKA_GUIDE_TOOL (draw_tool);
gint i;
for (i = 0; i < guide_tool->n_guides; i++)
{
PikaGuideToolGuide *guide = &guide_tool->guides[i];
if (guide->position != PIKA_GUIDE_POSITION_UNDEFINED)
{
/* custom guides are moved live */
if (! guide->custom)
{
pika_draw_tool_add_guide (draw_tool,
guide->orientation,
guide->position,
PIKA_GUIDE_STYLE_NONE);
}
}
}
}
static void
pika_guide_tool_start (PikaTool *parent_tool,
PikaDisplay *display,
GList *guides,
PikaOrientationType orientation)
{
PikaGuideTool *guide_tool;
PikaTool *tool;
guide_tool = g_object_new (PIKA_TYPE_GUIDE_TOOL,
"tool-info", parent_tool->tool_info,
NULL);
tool = PIKA_TOOL (guide_tool);
pika_display_shell_selection_pause (pika_display_get_shell (display));
if (guides)
{
gint i;
guide_tool->n_guides = g_list_length (guides);
guide_tool->guides = g_new (PikaGuideToolGuide, guide_tool->n_guides);
for (i = 0; i < guide_tool->n_guides; i++)
{
PikaGuide *guide = guides->data;
guide_tool->guides[i].guide = g_object_ref (guide);
guide_tool->guides[i].old_position = pika_guide_get_position (guide);
guide_tool->guides[i].position = pika_guide_get_position (guide);
guide_tool->guides[i].orientation = pika_guide_get_orientation (guide);
guide_tool->guides[i].custom = pika_guide_is_custom (guide);
guides = g_list_next (guides);
}
}
else
{
guide_tool->n_guides = 1;
guide_tool->guides = g_new (PikaGuideToolGuide, 1);
guide_tool->guides[0].guide = NULL;
guide_tool->guides[0].old_position = 0;
guide_tool->guides[0].position = PIKA_GUIDE_POSITION_UNDEFINED;
guide_tool->guides[0].orientation = orientation;
guide_tool->guides[0].custom = FALSE;
}
pika_tool_set_cursor (tool, display,
PIKA_CURSOR_MOUSE,
PIKA_TOOL_CURSOR_HAND,
PIKA_CURSOR_MODIFIER_MOVE);
tool_manager_push_tool (display->pika, tool);
tool->display = display;
pika_tool_control_activate (tool->control);
pika_draw_tool_start (PIKA_DRAW_TOOL (guide_tool), display);
pika_guide_tool_push_status (guide_tool, display, FALSE);
}
static void
pika_guide_tool_push_status (PikaGuideTool *guide_tool,
PikaDisplay *display,
gboolean remove_guides)
{
PikaTool *tool = PIKA_TOOL (guide_tool);
if (remove_guides)
{
pika_tool_push_status (tool, display,
guide_tool->n_guides > 1 ? _("Remove Guides") :
guide_tool->guides[0].guide ? _("Remove Guide") :
_("Cancel Guide"));
}
else
{
PikaGuideToolGuide *guides[2] = { 0, };
gint n_guides = 0;
gint i;
for (i = 0; i < guide_tool->n_guides; i++)
{
PikaGuideToolGuide *guide = &guide_tool->guides[i];
if (guide_tool->guides[i].guide)
{
if (n_guides == 0 || guide->orientation != guides[0]->orientation)
{
guides[n_guides++] = guide;
if (n_guides == 2)
break;
}
}
}
if (n_guides == 2 &&
guides[0]->orientation == PIKA_ORIENTATION_HORIZONTAL)
{
PikaGuideToolGuide *temp;
temp = guides[0];
guides[0] = guides[1];
guides[1] = temp;
}
if (n_guides == 1)
{
pika_tool_push_status_length (tool, display,
_("Move Guide: "),
SWAP_ORIENT (guides[0]->orientation),
guides[0]->position -
guides[0]->old_position,
NULL);
}
else if (n_guides == 2)
{
pika_tool_push_status_coords (tool, display,
PIKA_CURSOR_PRECISION_PIXEL_BORDER,
_("Move Guides: "),
guides[0]->position -
guides[0]->old_position,
", ",
guides[1]->position -
guides[1]->old_position,
NULL);
}
else
{
pika_tool_push_status_length (tool, display,
_("Add Guide: "),
SWAP_ORIENT (guide_tool->guides[0].orientation),
guide_tool->guides[0].position,
NULL);
}
}
}
/* public functions */
void
pika_guide_tool_start_new (PikaTool *parent_tool,
PikaDisplay *display,
PikaOrientationType orientation)
{
g_return_if_fail (PIKA_IS_TOOL (parent_tool));
g_return_if_fail (PIKA_IS_DISPLAY (display));
g_return_if_fail (orientation != PIKA_ORIENTATION_UNKNOWN);
pika_guide_tool_start (parent_tool, display,
NULL, orientation);
}
void
pika_guide_tool_start_edit (PikaTool *parent_tool,
PikaDisplay *display,
PikaGuide *guide)
{
GList *guides = NULL;
g_return_if_fail (PIKA_IS_TOOL (parent_tool));
g_return_if_fail (PIKA_IS_DISPLAY (display));
g_return_if_fail (PIKA_IS_GUIDE (guide));
guides = g_list_append (guides, guide);
pika_guide_tool_start (parent_tool, display,
guides, PIKA_ORIENTATION_UNKNOWN);
g_list_free (guides);
}
void
pika_guide_tool_start_edit_many (PikaTool *parent_tool,
PikaDisplay *display,
GList *guides)
{
g_return_if_fail (PIKA_IS_TOOL (parent_tool));
g_return_if_fail (PIKA_IS_DISPLAY (display));
g_return_if_fail (guides != NULL);
pika_guide_tool_start (parent_tool, display,
guides, PIKA_ORIENTATION_UNKNOWN);
}