1 /*
2 * go-palette.c :
3 *
4 * Copyright (C) 2006 Emmanuel Pacaud (emmanuel.pacaud@lapp.in2p3.fr)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of the
9 * License, or (at your option) version 3.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
19 * USA
20 */
21
22 #include <goffice/goffice-config.h>
23 #include <goffice/goffice.h>
24
25 #include <glib/gi18n-lib.h>
26 #include <gdk/gdkkeysyms.h>
27
28 #include <math.h>
29
30 enum {
31 GO_PALETTE_ACTIVATE,
32 GO_PALETTE_AUTOMATIC_ACTIVATE,
33 GO_PALETTE_CUSTOM_ACTIVATE,
34 GO_PALETTE_LAST_SIGNAL
35 };
36
37 static guint go_palette_signals[GO_PALETTE_LAST_SIGNAL] = {0,};
38
39 static void go_palette_finalize (GObject *object);
40 static GtkWidget *go_palette_menu_item_new (GOPalette *palette, int index);
41 static void cb_automatic_activate (GtkWidget *item, GOPalette *palette);
42 static void cb_custom_activate (GtkWidget *item, GOPalette *palette);
43
44 struct _GOPalettePrivate {
45 int n_swatches;
46 int n_columns;
47
48 int swatch_width;
49 int swatch_height;
50
51 GOPaletteSwatchRenderCallback swatch_render;
52 GOPaletteSwatchTooltipCallback get_tooltip;
53
54 gpointer data;
55 GDestroyNotify destroy;
56
57 gboolean show_automatic;
58 GtkWidget *automatic;
59 GtkWidget *automatic_separator;
60 char *automatic_label;
61 int automatic_index;
62
63 gboolean show_custom;
64 GtkWidget *custom;
65 GtkWidget *custom_separator;
66 char *custom_label;
67 };
68
G_DEFINE_TYPE(GOPalette,go_palette,GTK_TYPE_MENU)69 G_DEFINE_TYPE (GOPalette, go_palette, GTK_TYPE_MENU)
70
71 static void
72 go_palette_init (GOPalette *palette)
73 {
74 GOPalettePrivate *priv;
75 PangoLayout *layout;
76 PangoRectangle rect;
77
78 priv = G_TYPE_INSTANCE_GET_PRIVATE (palette, GO_TYPE_PALETTE, GOPalettePrivate);
79
80 palette->priv = priv;
81
82 priv->n_swatches = 0;
83 priv->n_columns = 1;
84
85 priv->swatch_render = NULL;
86 priv->data = NULL;
87 priv->destroy = NULL;
88
89 priv->automatic = NULL;
90 priv->automatic_separator = NULL;
91 priv->automatic_label = NULL;
92 priv->custom = NULL;
93 priv->custom_separator = NULL;
94 priv->custom_label = NULL;
95 priv->show_automatic = FALSE;
96 priv->show_custom = FALSE;
97
98 priv->automatic_index = 0;
99
100 layout = gtk_widget_create_pango_layout (GTK_WIDGET (palette), "A");
101 pango_layout_get_pixel_extents (layout, NULL, &rect);
102 g_object_unref (layout);
103
104 priv->swatch_height = rect.height + 2;
105 priv->swatch_width = priv->swatch_height;
106 }
107
108 static void
go_palette_realize(GtkWidget * widget)109 go_palette_realize (GtkWidget *widget)
110 {
111 GOPalette *palette = GO_PALETTE (widget);
112 GOPalettePrivate *priv = palette->priv;
113 GtkWidget *item;
114 int i, row;
115
116 for (i = 0; i < priv->n_swatches; i++) {
117 item = go_palette_menu_item_new (GO_PALETTE (palette), i);
118 gtk_menu_attach (GTK_MENU (palette), item, i % priv->n_columns, i % priv->n_columns + 1,
119 i / priv->n_columns + 2, i / priv->n_columns + 3);
120 gtk_widget_show (item);
121 }
122
123 if (priv->show_automatic) {
124 priv->automatic = gtk_menu_item_new_with_label (priv->automatic_label);
125 gtk_menu_attach (GTK_MENU (palette), priv->automatic, 0, priv->n_columns, 0, 1);
126 g_signal_connect (priv->automatic, "activate", G_CALLBACK (cb_automatic_activate), palette);
127 priv->automatic_separator = gtk_separator_menu_item_new ();
128 gtk_menu_attach (GTK_MENU (palette), priv->automatic_separator, 0, priv->n_columns, 1, 2);
129 gtk_widget_show (GTK_WIDGET (palette->priv->automatic));
130 gtk_widget_show (GTK_WIDGET (palette->priv->automatic_separator));
131 }
132
133 if (priv->show_custom) {
134 row = ((priv->n_swatches - 1) / priv->n_columns) + 3;
135
136 priv->custom_separator = gtk_separator_menu_item_new ();
137 gtk_menu_attach (GTK_MENU (palette), priv->custom_separator, 0, priv->n_columns,
138 row, row + 1);
139 priv->custom = gtk_menu_item_new_with_label (priv->custom_label);
140 gtk_menu_attach (GTK_MENU (palette), priv->custom, 0, priv->n_columns,
141 row + 1, row + 2);
142 g_signal_connect (priv->custom, "activate", G_CALLBACK (cb_custom_activate), palette);
143 gtk_widget_show (GTK_WIDGET (palette->priv->custom));
144 gtk_widget_show (GTK_WIDGET (palette->priv->custom_separator));
145 }
146
147 GTK_WIDGET_CLASS (go_palette_parent_class)->realize (widget);
148 }
149
150 static void
go_palette_class_init(GOPaletteClass * class)151 go_palette_class_init (GOPaletteClass *class)
152 {
153 GObjectClass *object_class = G_OBJECT_CLASS (class);
154 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
155
156 object_class->finalize = go_palette_finalize;
157 widget_class->realize = go_palette_realize;
158
159 go_palette_signals[GO_PALETTE_ACTIVATE] =
160 g_signal_new ("activate",
161 G_OBJECT_CLASS_TYPE (class),
162 G_SIGNAL_RUN_LAST,
163 G_STRUCT_OFFSET (GOPaletteClass, activate),
164 NULL, NULL,
165 g_cclosure_marshal_VOID__INT,
166 G_TYPE_NONE, 1, G_TYPE_INT);
167
168 go_palette_signals[GO_PALETTE_AUTOMATIC_ACTIVATE] =
169 g_signal_new ("automatic-activate",
170 G_OBJECT_CLASS_TYPE (class),
171 G_SIGNAL_RUN_LAST,
172 G_STRUCT_OFFSET (GOPaletteClass, automatic_activate),
173 NULL, NULL,
174 g_cclosure_marshal_VOID__INT,
175 G_TYPE_NONE, 1, G_TYPE_INT);
176
177 go_palette_signals[GO_PALETTE_CUSTOM_ACTIVATE] =
178 g_signal_new ("custom-activate",
179 G_OBJECT_CLASS_TYPE (class),
180 G_SIGNAL_RUN_LAST,
181 G_STRUCT_OFFSET (GOPaletteClass, custom_activate),
182 NULL, NULL,
183 g_cclosure_marshal_VOID__VOID,
184 G_TYPE_NONE, 0);
185
186 g_type_class_add_private (object_class, sizeof (GOPalettePrivate));
187
188 #ifdef HAVE_GTK_WIDGET_CLASS_SET_CSS_NAME
189 gtk_widget_class_set_css_name (widget_class, "palette");
190 #endif
191 }
192
193 static void
go_palette_finalize(GObject * object)194 go_palette_finalize (GObject *object)
195 {
196 GOPalettePrivate *priv;
197
198 priv = GO_PALETTE(object)->priv;
199
200 if (priv->data && priv->destroy)
201 (priv->destroy) (priv->data);
202 g_free (priv->automatic_label);
203 g_free (priv->custom_label);
204
205 (* G_OBJECT_CLASS (go_palette_parent_class)->finalize) (object);
206 }
207
208 static gboolean
cb_swatch_draw(GtkWidget * swatch,cairo_t * cr,GOPalette * palette)209 cb_swatch_draw (GtkWidget *swatch, cairo_t *cr, GOPalette *palette)
210 {
211 if (palette->priv->swatch_render) {
212 GdkRectangle area;
213 int index;
214 GtkAllocation allocation;
215
216 gtk_widget_get_allocation (swatch, &allocation);
217 area.x = 0;
218 area.y = 0;
219 area.width = allocation.width;
220 area.height = allocation.height;
221
222 index = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (swatch), "index"));
223
224 (palette->priv->swatch_render) (cr, &area, index, palette->priv->data);
225
226 }
227 return TRUE;
228 }
229
230 static void
cb_menu_item_activate(GtkWidget * item,GOPalette * palette)231 cb_menu_item_activate (GtkWidget *item, GOPalette *palette)
232 {
233 int index;
234
235 index = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (gtk_bin_get_child (GTK_BIN (item))), "index"));
236 g_signal_emit (palette, go_palette_signals[GO_PALETTE_ACTIVATE], 0, index);
237 }
238
239 static void
cb_menu_item_toggle_size_request(GtkWidget * item,gint * requitision)240 cb_menu_item_toggle_size_request (GtkWidget *item, gint *requitision)
241 {
242 *requitision = 1;
243 }
244
245 static GtkWidget *
go_palette_menu_item_new(GOPalette * palette,int index)246 go_palette_menu_item_new (GOPalette *palette, int index)
247 {
248 GtkWidget *swatch;
249 GtkWidget *item;
250 GOPalettePrivate *priv = palette->priv;
251
252 item = gtk_menu_item_new ();
253 swatch = go_palette_swatch_new (palette, index);
254 gtk_container_add (GTK_CONTAINER (item), swatch);
255
256 if (priv->get_tooltip) {
257 char const *tip;
258
259 tip = priv->get_tooltip (index, priv->data);
260 gtk_widget_set_tooltip_text (item, tip);
261 }
262
263 g_signal_connect (item, "activate", G_CALLBACK (cb_menu_item_activate), palette);
264
265 /* Workaround for bug http://bugzilla.gnome.org/show_bug.cgi?id=585421 */
266 g_signal_connect (item, "toggle-size-request", G_CALLBACK (cb_menu_item_toggle_size_request), NULL);
267
268 return item;
269 }
270
271 static void
cb_automatic_activate(GtkWidget * item,GOPalette * palette)272 cb_automatic_activate (GtkWidget *item, GOPalette *palette)
273 {
274 g_signal_emit (palette, go_palette_signals[GO_PALETTE_AUTOMATIC_ACTIVATE], 0,
275 palette->priv->automatic_index);
276 }
277
278 static void
cb_custom_activate(GtkWidget * item,GOPalette * palette)279 cb_custom_activate (GtkWidget *item, GOPalette *palette)
280 {
281 g_signal_emit (palette, go_palette_signals[GO_PALETTE_CUSTOM_ACTIVATE], 0);
282 }
283
284 /**
285 * go_palette_new:
286 * @n_swatches: number of palette items
287 * @swatch_width: swatch width as multiple of swatch height
288 * @n_columns: number of columns for displaying palette items
289 * @swatch_render: (scope notified): a user function used for swatch rendering
290 * @get_tooltip: (scope notified): a user function for tooltips.
291 * @data: user data for use by swatch render function
292 * @destroy: (scope async): a function to destroy user data on widget finalization
293 *
294 * Returns: a new #GOPalette object.
295 **/
296 GtkWidget *
go_palette_new(int n_swatches,double swatch_width,int n_columns,GOPaletteSwatchRenderCallback swatch_render,GOPaletteSwatchTooltipCallback get_tooltip,gpointer data,GDestroyNotify destroy)297 go_palette_new (int n_swatches,
298 double swatch_width,
299 int n_columns,
300 GOPaletteSwatchRenderCallback swatch_render,
301 GOPaletteSwatchTooltipCallback get_tooltip,
302 gpointer data,
303 GDestroyNotify destroy)
304 {
305 GOPalettePrivate *priv;
306 GtkWidget *palette;
307
308 palette = g_object_new (GO_TYPE_PALETTE, NULL);
309
310 g_return_val_if_fail (n_swatches >= 1, palette);
311
312 priv = GO_PALETTE (palette)->priv;
313
314 priv->n_swatches = n_swatches;
315 priv->swatch_render = swatch_render;
316 priv->get_tooltip = get_tooltip;
317 priv->data = data;
318 priv->destroy = destroy;
319 if (swatch_width > 0.)
320 priv->swatch_width = priv->swatch_height * swatch_width;
321
322 if (n_columns < 1)
323 n_columns = 1;
324 priv->n_columns = n_columns;
325
326 return palette;
327 }
328
329 /**
330 * go_palette_show_automatic:
331 * @palette: a #GOPalette
332 * @index: index to use on automatic item activation
333 * @label: if not %NULL, replace automatic button label
334 *
335 * Adds an automatic button to @palette.
336 **/
337 void
go_palette_show_automatic(GOPalette * palette,int index,char const * label)338 go_palette_show_automatic (GOPalette *palette,
339 int index,
340 char const *label)
341 {
342 GOPalettePrivate *priv;
343
344 g_return_if_fail (GO_IS_PALETTE (palette));
345
346 priv = palette->priv;
347 g_return_if_fail (!priv->show_automatic);
348
349 priv->automatic_label = g_strdup (label == NULL ? _("Automatic"): _(label));
350 priv->automatic_index = index;
351 priv->show_automatic = TRUE;
352 }
353
354 /**
355 * go_palette_show_custom:
356 * @palette: a #GOPalette
357 * @label: if not %NULL, replaces custom button label
358 *
359 * Adds a custom button to bottom of @palette. An activation
360 * of custom button will cause an emition of "custom_activate" signal.
361 **/
362 void
go_palette_show_custom(GOPalette * palette,char const * label)363 go_palette_show_custom (GOPalette *palette,
364 char const *label)
365 {
366 GOPalettePrivate *priv;
367
368 g_return_if_fail (GO_IS_PALETTE (palette));
369
370 priv = palette->priv;
371 g_return_if_fail (!priv->show_custom);
372
373 priv->custom_label = g_strdup (label == NULL ? _("Custom...") : _(label));
374 priv->show_custom = TRUE;
375 }
376
377 /**
378 * go_palette_get_user_data:
379 * @palette: a #GOPalette
380 *
381 * Returns: (transfer none): a pointer to user data given to go_palette_new function.
382 **/
383 gpointer
go_palette_get_user_data(GOPalette * palette)384 go_palette_get_user_data (GOPalette *palette)
385 {
386 g_return_val_if_fail (GO_IS_PALETTE (palette), NULL);
387
388 return palette->priv->data;
389 }
390
391 /**
392 * go_palette_swatch_new:
393 * @palette: a #GOPalette
394 * @index: default index
395 *
396 * Returns: (transfer full): a new #GtkDrawingArea which will be rendered like a @palette
397 * swatch. @index can be changed later by changing swatch "index" data.
398 **/
399 GtkWidget *
go_palette_swatch_new(GOPalette * palette,int index)400 go_palette_swatch_new (GOPalette *palette, int index)
401 {
402 GtkWidget *swatch;
403
404 g_return_val_if_fail (GO_IS_PALETTE (palette), NULL);
405
406 swatch = gtk_drawing_area_new ();
407
408 g_object_set_data (G_OBJECT (swatch), "index", GINT_TO_POINTER (index));
409 g_signal_connect (G_OBJECT (swatch), "draw", G_CALLBACK (cb_swatch_draw), palette);
410 gtk_widget_set_size_request (swatch,
411 palette->priv->swatch_width,
412 palette->priv->swatch_height);
413
414 gtk_widget_show (swatch);
415
416 return swatch;
417 }
418
419 /**
420 * go_palette_get_n_swatches:
421 * @palette: a #GOPalette
422 *
423 * A convenience function.
424 *
425 * Returns: the number of palette items.
426 **/
427 int
go_palette_get_n_swatches(GOPalette * palette)428 go_palette_get_n_swatches (GOPalette *palette)
429 {
430 g_return_val_if_fail (GO_IS_PALETTE (palette), 0);
431
432 return palette->priv->n_swatches;
433 }
434
435