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 <string.h>
21
22 #include <gegl.h>
23 #include <gtk/gtk.h>
24
25 #include "libgimpmath/gimpmath.h"
26 #include "libgimpwidgets/gimpwidgets.h"
27
28 #include "widgets-types.h"
29
30 #include "core/gimphistogram.h"
31
32 #include "gimpcolorbar.h"
33 #include "gimphandlebar.h"
34 #include "gimphistogrambox.h"
35 #include "gimphistogramview.h"
36
37 #include "gimp-intl.h"
38
39
40 /* #define DEBUG_VIEW */
41
42 #define GRADIENT_HEIGHT 12
43 #define CONTROL_HEIGHT 10
44
45
46 /* local function prototypes */
47
48 static void gimp_histogram_box_low_adj_update (GtkAdjustment *adj,
49 GimpHistogramBox *box);
50 static void gimp_histogram_box_high_adj_update (GtkAdjustment *adj,
51 GimpHistogramBox *box);
52 static void gimp_histogram_box_histogram_range (GimpHistogramView *view,
53 gint start,
54 gint end,
55 GimpHistogramBox *box);
56 static void gimp_histogram_box_channel_notify (GimpHistogramView *view,
57 GParamSpec *pspec,
58 GimpHistogramBox *box);
59 static void gimp_histogram_box_border_notify (GimpHistogramView *view,
60 GParamSpec *pspec,
61 GimpHistogramBox *box);
62
63
G_DEFINE_TYPE(GimpHistogramBox,gimp_histogram_box,GTK_TYPE_BOX)64 G_DEFINE_TYPE (GimpHistogramBox, gimp_histogram_box, GTK_TYPE_BOX)
65
66
67 static void
68 gimp_histogram_box_class_init (GimpHistogramBoxClass *klass)
69 {
70 }
71
72 static void
gimp_histogram_box_init(GimpHistogramBox * box)73 gimp_histogram_box_init (GimpHistogramBox *box)
74 {
75 GtkWidget *hbox;
76 GtkWidget *vbox;
77 GtkWidget *vbox2;
78 GtkWidget *frame;
79 GtkWidget *view;
80 GtkWidget *bar;
81
82 box->n_bins = 256;
83
84 gtk_orientable_set_orientation (GTK_ORIENTABLE (box),
85 GTK_ORIENTATION_VERTICAL);
86
87 gtk_box_set_spacing (GTK_BOX (box), 2);
88
89 frame = gtk_frame_new (NULL);
90 gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
91 gtk_box_pack_start (GTK_BOX (box), frame, TRUE, TRUE, 0);
92 gtk_widget_show (frame);
93
94 vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
95 gtk_container_add (GTK_CONTAINER (frame), vbox);
96 gtk_widget_show (vbox);
97
98 /* The histogram */
99 view = gimp_histogram_view_new (TRUE);
100 gtk_box_pack_start (GTK_BOX (vbox), view, TRUE, TRUE, 0);
101 gtk_widget_show (view);
102
103 g_signal_connect (view, "range-changed",
104 G_CALLBACK (gimp_histogram_box_histogram_range),
105 box);
106
107 box->view = GIMP_HISTOGRAM_VIEW (view);
108
109 /* The gradient below the histogram */
110 vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
111 gtk_container_set_border_width (GTK_CONTAINER (vbox2),
112 GIMP_HISTOGRAM_VIEW (view)->border_width);
113 gtk_box_pack_start (GTK_BOX (vbox), vbox2, FALSE, FALSE, 0);
114 gtk_widget_show (vbox2);
115
116 box->color_bar = bar = g_object_new (GIMP_TYPE_COLOR_BAR,
117 "histogram-channel", box->view->channel,
118 NULL);
119 gtk_widget_set_size_request (bar, -1, GRADIENT_HEIGHT);
120 gtk_box_pack_start (GTK_BOX (vbox2), bar, FALSE, FALSE, 0);
121 gtk_widget_show (bar);
122
123 g_signal_connect (view, "notify::histogram-channel",
124 G_CALLBACK (gimp_histogram_box_channel_notify),
125 box);
126 g_signal_connect (view, "notify::border-width",
127 G_CALLBACK (gimp_histogram_box_border_notify),
128 box);
129
130 box->slider_bar = bar = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
131 gtk_widget_set_size_request (bar, -1, CONTROL_HEIGHT);
132 gtk_box_pack_start (GTK_BOX (vbox2), bar, FALSE, FALSE, 0);
133 gtk_widget_show (bar);
134
135 gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (box->slider_bar),
136 box->color_bar);
137
138 /* The range selection */
139 hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
140 gtk_box_pack_start (GTK_BOX (box), hbox, FALSE, FALSE, 0);
141 gtk_widget_show (hbox);
142
143 /* low spinbutton */
144 box->low_adj = (GtkAdjustment *)
145 gtk_adjustment_new (0.0, 0.0, 255.0, 1.0, 16.0, 0.0);
146 box->low_spinbutton = gimp_spin_button_new (box->low_adj, 1.0, 0);
147 gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (box->low_spinbutton), TRUE);
148 gtk_box_pack_start (GTK_BOX (hbox), box->low_spinbutton, FALSE, FALSE, 0);
149 gtk_widget_show (box->low_spinbutton);
150
151 g_signal_connect (box->low_adj, "value-changed",
152 G_CALLBACK (gimp_histogram_box_low_adj_update),
153 box);
154
155 gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (bar), 0,
156 GTK_ADJUSTMENT (box->low_adj));
157
158 /* high spinbutton */
159 box->high_adj = (GtkAdjustment *)
160 gtk_adjustment_new (255.0, 0.0, 255.0, 1.0, 16.0, 0.0);
161 box->high_spinbutton = gimp_spin_button_new (box->high_adj, 1.0, 0);
162 gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (box->high_spinbutton), TRUE);
163 gtk_box_pack_end (GTK_BOX (hbox), box->high_spinbutton, FALSE, FALSE, 0);
164 gtk_widget_show (box->high_spinbutton);
165
166 g_signal_connect (box->high_adj, "value-changed",
167 G_CALLBACK (gimp_histogram_box_high_adj_update),
168 box);
169
170 gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (bar), 2,
171 GTK_ADJUSTMENT (box->high_adj));
172
173 #ifdef DEBUG_VIEW
174 spinbutton = gimp_prop_spin_button_new (G_OBJECT (box->view), "border-width",
175 1, 5, 0);
176 gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
177 gtk_widget_show (spinbutton);
178
179 spinbutton = gimp_prop_spin_button_new (G_OBJECT (box->view), "subdivisions",
180 1, 5, 0);
181 gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
182 gtk_widget_show (spinbutton);
183 #endif
184 }
185
186 static void
gimp_histogram_box_low_adj_update(GtkAdjustment * adjustment,GimpHistogramBox * box)187 gimp_histogram_box_low_adj_update (GtkAdjustment *adjustment,
188 GimpHistogramBox *box)
189 {
190 gdouble value = gtk_adjustment_get_value (adjustment);
191
192 gtk_adjustment_set_lower (box->high_adj, value);
193
194 if (box->n_bins != 256)
195 value *= box->n_bins - 1;
196
197 value = ROUND (value);
198
199 if (box->view->start != value)
200 gimp_histogram_view_set_range (box->view, value, box->view->end);
201 }
202
203 static void
gimp_histogram_box_high_adj_update(GtkAdjustment * adjustment,GimpHistogramBox * box)204 gimp_histogram_box_high_adj_update (GtkAdjustment *adjustment,
205 GimpHistogramBox *box)
206 {
207 gdouble value = gtk_adjustment_get_value (adjustment);
208
209 gtk_adjustment_set_upper (box->low_adj, value);
210
211 if (box->n_bins != 256)
212 value *= box->n_bins - 1;
213
214 value = ROUND (value);
215
216 if (box->view->end != value)
217 gimp_histogram_view_set_range (box->view, box->view->start, value);
218 }
219
220 static void
gimp_histogram_box_histogram_range(GimpHistogramView * view,gint start,gint end,GimpHistogramBox * box)221 gimp_histogram_box_histogram_range (GimpHistogramView *view,
222 gint start,
223 gint end,
224 GimpHistogramBox *box)
225 {
226 gdouble s = start;
227 gdouble e = end;
228
229 if (box->n_bins != view->n_bins)
230 {
231 gdouble upper;
232 gdouble page_increment;
233 gdouble step_increment;
234 guint digits;
235
236 box->n_bins = view->n_bins;
237
238 if (box->n_bins == 256)
239 {
240 digits = 0;
241 upper = 255.0;
242 step_increment = 1.0;
243 page_increment = 16.0;
244 }
245 else
246 {
247 digits = 3;
248 upper = 1.0;
249 step_increment = 0.01;
250 page_increment = 0.1;
251 }
252
253 g_object_set (G_OBJECT (box->high_adj),
254 "upper", upper,
255 "step-increment", step_increment,
256 "page-increment", page_increment,
257 NULL);
258
259 gtk_spin_button_set_digits (GTK_SPIN_BUTTON (box->high_spinbutton), digits);
260
261 g_object_set (G_OBJECT (box->low_adj),
262 "step-increment", step_increment,
263 "page-increment", page_increment,
264 NULL);
265
266 gtk_spin_button_set_digits (GTK_SPIN_BUTTON (box->low_spinbutton), digits);
267 }
268
269 if (box->n_bins != 256)
270 {
271 s /= box->n_bins - 1;
272 e /= box->n_bins - 1;
273 }
274
275 gtk_adjustment_set_lower (box->high_adj, s);
276 gtk_adjustment_set_upper (box->low_adj, e);
277
278 gtk_adjustment_set_value (box->low_adj, s);
279 gtk_adjustment_set_value (box->high_adj, e);
280 }
281
282 static void
gimp_histogram_box_channel_notify(GimpHistogramView * view,GParamSpec * pspec,GimpHistogramBox * box)283 gimp_histogram_box_channel_notify (GimpHistogramView *view,
284 GParamSpec *pspec,
285 GimpHistogramBox *box)
286 {
287 gimp_color_bar_set_channel (GIMP_COLOR_BAR (box->color_bar), view->channel);
288 }
289
290 static void
gimp_histogram_box_border_notify(GimpHistogramView * view,GParamSpec * pspec,GimpHistogramBox * box)291 gimp_histogram_box_border_notify (GimpHistogramView *view,
292 GParamSpec *pspec,
293 GimpHistogramBox *box)
294 {
295 GtkWidget *vbox = gtk_widget_get_parent (box->color_bar);
296
297 gtk_container_set_border_width (GTK_CONTAINER (vbox), view->border_width);
298 }
299
300
301 /* public functions */
302
303 GtkWidget *
gimp_histogram_box_new(void)304 gimp_histogram_box_new (void)
305 {
306 return g_object_new (GIMP_TYPE_HISTOGRAM_BOX, NULL);
307 }
308
309 void
gimp_histogram_box_set_channel(GimpHistogramBox * box,GimpHistogramChannel channel)310 gimp_histogram_box_set_channel (GimpHistogramBox *box,
311 GimpHistogramChannel channel)
312 {
313 g_return_if_fail (GIMP_IS_HISTOGRAM_BOX (box));
314
315 if (box->view)
316 gimp_histogram_view_set_channel (box->view, channel);
317 }
318