PIKApp/app/tools/pikaerasertool.c

180 lines
6.0 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 "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "core/pikadrawable.h"
#include "paint/pikaeraseroptions.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikawidgets-utils.h"
#include "pikaerasertool.h"
#include "pikapaintoptions-gui.h"
#include "pikatoolcontrol.h"
#include "pika-intl.h"
static void pika_eraser_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display);
static void pika_eraser_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display);
static gboolean pika_eraser_tool_is_alpha_only (PikaPaintTool *paint_tool,
PikaDrawable *drawable);
static GtkWidget * pika_eraser_options_gui (PikaToolOptions *tool_options);
G_DEFINE_TYPE (PikaEraserTool, pika_eraser_tool, PIKA_TYPE_BRUSH_TOOL)
#define parent_class pika_eraser_tool_parent_class
void
pika_eraser_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
(* callback) (PIKA_TYPE_ERASER_TOOL,
PIKA_TYPE_ERASER_OPTIONS,
pika_eraser_options_gui,
PIKA_PAINT_OPTIONS_CONTEXT_MASK,
"pika-eraser-tool",
_("Eraser"),
_("Eraser Tool: Erase to background or transparency using a brush"),
N_("_Eraser"), "<shift>E",
NULL, PIKA_HELP_TOOL_ERASER,
PIKA_ICON_TOOL_ERASER,
data);
}
static void
pika_eraser_tool_class_init (PikaEraserToolClass *klass)
{
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
PikaPaintToolClass *paint_tool_class = PIKA_PAINT_TOOL_CLASS (klass);
tool_class->modifier_key = pika_eraser_tool_modifier_key;
tool_class->cursor_update = pika_eraser_tool_cursor_update;
paint_tool_class->is_alpha_only = pika_eraser_tool_is_alpha_only;
}
static void
pika_eraser_tool_init (PikaEraserTool *eraser)
{
PikaTool *tool = PIKA_TOOL (eraser);
PikaPaintTool *paint_tool = PIKA_PAINT_TOOL (eraser);
pika_tool_control_set_tool_cursor (tool->control,
PIKA_TOOL_CURSOR_ERASER);
pika_tool_control_set_toggle_cursor_modifier (tool->control,
PIKA_CURSOR_MODIFIER_MINUS);
pika_paint_tool_enable_color_picker (paint_tool,
PIKA_COLOR_PICK_TARGET_BACKGROUND);
paint_tool->status = _("Click to erase");
paint_tool->status_line = _("Click to erase the line");
paint_tool->status_ctrl = _("%s to pick a background color");
}
static void
pika_eraser_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display)
{
if (key == GDK_MOD1_MASK)
{
PikaEraserOptions *options = PIKA_ERASER_TOOL_GET_OPTIONS (tool);
g_object_set (options,
"anti-erase", ! options->anti_erase,
NULL);
}
PIKA_TOOL_CLASS (parent_class)->modifier_key (tool, key, press, state, display);
}
static void
pika_eraser_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display)
{
PikaEraserOptions *options = PIKA_ERASER_TOOL_GET_OPTIONS (tool);
pika_tool_control_set_toggled (tool->control, options->anti_erase);
PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static gboolean
pika_eraser_tool_is_alpha_only (PikaPaintTool *paint_tool,
PikaDrawable *drawable)
{
PikaEraserOptions *options = PIKA_ERASER_TOOL_GET_OPTIONS (paint_tool);
if (! options->anti_erase)
return pika_drawable_has_alpha (drawable);
else
return TRUE;
}
/* tool options stuff */
static GtkWidget *
pika_eraser_options_gui (PikaToolOptions *tool_options)
{
GObject *config = G_OBJECT (tool_options);
GtkWidget *vbox = pika_paint_options_gui (tool_options);
GtkWidget *button;
gchar *str;
/* the anti_erase toggle */
str = g_strdup_printf (_("Anti erase (%s)"),
pika_get_mod_string (GDK_MOD1_MASK));
button = pika_prop_check_button_new (config, "anti-erase", str);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
g_free (str);
return vbox;
}