1 /* GIMP - The GNU Image Manipulation Program
2 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 3 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18 #include "config.h"
19
20 #include <gegl.h>
21 #include <gtk/gtk.h>
22
23 #include "libgimpwidgets/gimpwidgets.h"
24
25 #include "tools-types.h"
26
27 #include "core/gimpdrawable.h"
28
29 #include "paint/gimperaseroptions.h"
30
31 #include "widgets/gimphelp-ids.h"
32 #include "widgets/gimpwidgets-utils.h"
33
34 #include "gimperasertool.h"
35 #include "gimppaintoptions-gui.h"
36 #include "gimptoolcontrol.h"
37
38 #include "gimp-intl.h"
39
40
41 static void gimp_eraser_tool_modifier_key (GimpTool *tool,
42 GdkModifierType key,
43 gboolean press,
44 GdkModifierType state,
45 GimpDisplay *display);
46 static void gimp_eraser_tool_cursor_update (GimpTool *tool,
47 const GimpCoords *coords,
48 GdkModifierType state,
49 GimpDisplay *display);
50
51 static gboolean gimp_eraser_tool_is_alpha_only (GimpPaintTool *paint_tool,
52 GimpDrawable *drawable);
53
54 static GtkWidget * gimp_eraser_options_gui (GimpToolOptions *tool_options);
55
56
G_DEFINE_TYPE(GimpEraserTool,gimp_eraser_tool,GIMP_TYPE_BRUSH_TOOL)57 G_DEFINE_TYPE (GimpEraserTool, gimp_eraser_tool, GIMP_TYPE_BRUSH_TOOL)
58
59 #define parent_class gimp_eraser_tool_parent_class
60
61
62 void
63 gimp_eraser_tool_register (GimpToolRegisterCallback callback,
64 gpointer data)
65 {
66 (* callback) (GIMP_TYPE_ERASER_TOOL,
67 GIMP_TYPE_ERASER_OPTIONS,
68 gimp_eraser_options_gui,
69 GIMP_PAINT_OPTIONS_CONTEXT_MASK,
70 "gimp-eraser-tool",
71 _("Eraser"),
72 _("Eraser Tool: Erase to background or transparency using a brush"),
73 N_("_Eraser"), "<shift>E",
74 NULL, GIMP_HELP_TOOL_ERASER,
75 GIMP_ICON_TOOL_ERASER,
76 data);
77 }
78
79 static void
gimp_eraser_tool_class_init(GimpEraserToolClass * klass)80 gimp_eraser_tool_class_init (GimpEraserToolClass *klass)
81 {
82 GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
83 GimpPaintToolClass *paint_tool_class = GIMP_PAINT_TOOL_CLASS (klass);
84
85 tool_class->modifier_key = gimp_eraser_tool_modifier_key;
86 tool_class->cursor_update = gimp_eraser_tool_cursor_update;
87
88 paint_tool_class->is_alpha_only = gimp_eraser_tool_is_alpha_only;
89 }
90
91 static void
gimp_eraser_tool_init(GimpEraserTool * eraser)92 gimp_eraser_tool_init (GimpEraserTool *eraser)
93 {
94 GimpTool *tool = GIMP_TOOL (eraser);
95 GimpPaintTool *paint_tool = GIMP_PAINT_TOOL (eraser);
96
97 gimp_tool_control_set_tool_cursor (tool->control,
98 GIMP_TOOL_CURSOR_ERASER);
99 gimp_tool_control_set_toggle_cursor_modifier (tool->control,
100 GIMP_CURSOR_MODIFIER_MINUS);
101
102 gimp_paint_tool_enable_color_picker (paint_tool,
103 GIMP_COLOR_PICK_TARGET_BACKGROUND);
104
105 paint_tool->status = _("Click to erase");
106 paint_tool->status_line = _("Click to erase the line");
107 paint_tool->status_ctrl = _("%s to pick a background color");
108 }
109
110 static void
gimp_eraser_tool_modifier_key(GimpTool * tool,GdkModifierType key,gboolean press,GdkModifierType state,GimpDisplay * display)111 gimp_eraser_tool_modifier_key (GimpTool *tool,
112 GdkModifierType key,
113 gboolean press,
114 GdkModifierType state,
115 GimpDisplay *display)
116 {
117 if (key == GDK_MOD1_MASK)
118 {
119 GimpEraserOptions *options = GIMP_ERASER_TOOL_GET_OPTIONS (tool);
120
121 g_object_set (options,
122 "anti-erase", ! options->anti_erase,
123 NULL);
124 }
125
126 GIMP_TOOL_CLASS (parent_class)->modifier_key (tool, key, press, state, display);
127 }
128
129 static void
gimp_eraser_tool_cursor_update(GimpTool * tool,const GimpCoords * coords,GdkModifierType state,GimpDisplay * display)130 gimp_eraser_tool_cursor_update (GimpTool *tool,
131 const GimpCoords *coords,
132 GdkModifierType state,
133 GimpDisplay *display)
134 {
135 GimpEraserOptions *options = GIMP_ERASER_TOOL_GET_OPTIONS (tool);
136
137 gimp_tool_control_set_toggled (tool->control, options->anti_erase);
138
139 GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
140 }
141
142 static gboolean
gimp_eraser_tool_is_alpha_only(GimpPaintTool * paint_tool,GimpDrawable * drawable)143 gimp_eraser_tool_is_alpha_only (GimpPaintTool *paint_tool,
144 GimpDrawable *drawable)
145 {
146 GimpEraserOptions *options = GIMP_ERASER_TOOL_GET_OPTIONS (paint_tool);
147
148 if (! options->anti_erase)
149 return gimp_drawable_has_alpha (drawable);
150 else
151 return TRUE;
152 }
153
154
155 /* tool options stuff */
156
157 static GtkWidget *
gimp_eraser_options_gui(GimpToolOptions * tool_options)158 gimp_eraser_options_gui (GimpToolOptions *tool_options)
159 {
160 GObject *config = G_OBJECT (tool_options);
161 GtkWidget *vbox = gimp_paint_options_gui (tool_options);
162 GtkWidget *button;
163 gchar *str;
164
165 /* the anti_erase toggle */
166 str = g_strdup_printf (_("Anti erase (%s)"),
167 gimp_get_mod_string (GDK_MOD1_MASK));
168
169 button = gimp_prop_check_button_new (config, "anti-erase", str);
170 gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
171 gtk_widget_show (button);
172
173 g_free (str);
174
175 return vbox;
176 }
177