1 /*
2 * GNT - The GLib Ncurses Toolkit
3 *
4 * GNT is the legal property of its developers, whose names are too numerous
5 * to list here. Please refer to the COPYRIGHT file distributed with this
6 * source distribution.
7 *
8 * This library is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
21 */
22
23 #include "gntinternal.h"
24 #include "gntbox.h"
25 #include "gntcombobox.h"
26 #include "gnttree.h"
27 #include "gntmarshal.h"
28 #include "gntstyle.h"
29 #include "gntutils.h"
30
31 #include <string.h>
32
33 enum
34 {
35 SIG_SELECTION_CHANGED,
36 SIGS,
37 };
38
39 static GntWidgetClass *parent_class = NULL;
40 static guint signals[SIGS] = { 0 };
41 static void (*widget_lost_focus)(GntWidget *widget);
42
43 static void
set_selection(GntComboBox * box,gpointer key)44 set_selection(GntComboBox *box, gpointer key)
45 {
46 if (box->selected != key)
47 {
48 /* XXX: make sure the key actually does exist */
49 gpointer old = box->selected;
50 box->selected = key;
51 if (GNT_WIDGET(box)->window)
52 gnt_widget_draw(GNT_WIDGET(box));
53 if (box->dropdown)
54 gnt_tree_set_selected(GNT_TREE(box->dropdown), key);
55 g_signal_emit(box, signals[SIG_SELECTION_CHANGED], 0, old, key);
56 }
57 }
58
59 static void
hide_popup(GntComboBox * box,gboolean set)60 hide_popup(GntComboBox *box, gboolean set)
61 {
62 gnt_widget_set_size(box->dropdown,
63 box->dropdown->priv.width - 1, box->dropdown->priv.height);
64 if (set)
65 set_selection(box, gnt_tree_get_selection_data(GNT_TREE(box->dropdown)));
66 else
67 gnt_tree_set_selected(GNT_TREE(box->dropdown), box->selected);
68 gnt_widget_hide(box->dropdown->parent);
69 }
70
71 static void
gnt_combo_box_draw(GntWidget * widget)72 gnt_combo_box_draw(GntWidget *widget)
73 {
74 GntComboBox *box = GNT_COMBO_BOX(widget);
75 char *text = NULL, *s;
76 GntColorType type;
77 int len;
78
79 if (box->dropdown && box->selected)
80 text = gnt_tree_get_selection_text(GNT_TREE(box->dropdown));
81
82 if (text == NULL)
83 text = g_strdup("");
84
85 if (gnt_widget_has_focus(widget))
86 type = GNT_COLOR_HIGHLIGHT;
87 else
88 type = GNT_COLOR_NORMAL;
89
90 wbkgdset(widget->window, '\0' | gnt_color_pair(type));
91
92 s = (char*)gnt_util_onscreen_width_to_pointer(text, widget->priv.width - 4, &len);
93 *s = '\0';
94
95 mvwaddstr(widget->window, 1, 1, C_(text));
96 whline(widget->window, ' ' | gnt_color_pair(type), widget->priv.width - 4 - len);
97 mvwaddch(widget->window, 1, widget->priv.width - 3, ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL));
98 mvwaddch(widget->window, 1, widget->priv.width - 2, ACS_DARROW | gnt_color_pair(GNT_COLOR_NORMAL));
99 (void)wmove(widget->window, 1, 1);
100
101 g_free(text);
102 GNTDEBUG;
103 }
104
105 static void
gnt_combo_box_size_request(GntWidget * widget)106 gnt_combo_box_size_request(GntWidget *widget)
107 {
108 if (!gnt_widget_get_mapped(widget)) {
109 GntWidget *dd = GNT_COMBO_BOX(widget)->dropdown;
110 gnt_widget_size_request(dd);
111 widget->priv.height = 3; /* For now, a combobox will have border */
112 widget->priv.width = MAX(10, dd->priv.width + 2);
113 }
114 }
115
116 static void
gnt_combo_box_map(GntWidget * widget)117 gnt_combo_box_map(GntWidget *widget)
118 {
119 if (widget->priv.width == 0 || widget->priv.height == 0)
120 gnt_widget_size_request(widget);
121 GNTDEBUG;
122 }
123
124 static void
popup_dropdown(GntComboBox * box)125 popup_dropdown(GntComboBox *box)
126 {
127 GntWidget *widget = GNT_WIDGET(box);
128 GntWidget *parent = box->dropdown->parent;
129 int height = g_list_length(GNT_TREE(box->dropdown)->list);
130 int y = widget->priv.y + widget->priv.height - 1;
131 gnt_widget_set_size(box->dropdown, widget->priv.width, height + 2);
132
133 if (y + height + 2 >= getmaxy(stdscr))
134 y = widget->priv.y - height - 1;
135 gnt_widget_set_position(parent, widget->priv.x, y);
136 if (parent->window)
137 {
138 mvwin(parent->window, y, widget->priv.x);
139 wresize(parent->window, height+2, widget->priv.width);
140 }
141 parent->priv.width = widget->priv.width;
142 parent->priv.height = height + 2;
143
144 gnt_widget_set_visible(parent, TRUE);
145 gnt_widget_draw(parent);
146 }
147
148 static gboolean
gnt_combo_box_key_pressed(GntWidget * widget,const char * text)149 gnt_combo_box_key_pressed(GntWidget *widget, const char *text)
150 {
151 GntComboBox *box = GNT_COMBO_BOX(widget);
152 gboolean showing = gnt_widget_get_mapped(box->dropdown->parent);
153
154 if (showing) {
155 if (text[1] == 0) {
156 switch (text[0]) {
157 case '\r':
158 case '\t':
159 case '\n':
160 hide_popup(box, TRUE);
161 return TRUE;
162 case 27:
163 hide_popup(box, FALSE);
164 return TRUE;
165 }
166 }
167 }
168
169 if (gnt_widget_key_pressed(box->dropdown, text)) {
170 if (!showing)
171 popup_dropdown(box);
172 return TRUE;
173 }
174
175 {
176 #define SEARCH_IN_RANGE(start, end) do { \
177 GntTreeRow *row; \
178 for (row = start; row != end; \
179 row = gnt_tree_row_get_next(tree, row)) { \
180 gpointer key = gnt_tree_row_get_key(tree, row); \
181 GList *list = gnt_tree_get_row_text_list(tree, key); \
182 gboolean found = FALSE; \
183 found = (list->data && g_ascii_strncasecmp(text, list->data, len) == 0); \
184 g_list_foreach(list, (GFunc)g_free, NULL); \
185 g_list_free(list); \
186 if (found) { \
187 if (!showing) \
188 popup_dropdown(box); \
189 gnt_tree_set_selected(tree, key); \
190 return TRUE; \
191 } \
192 } \
193 } while (0)
194
195 int len = strlen(text);
196 GntTree *tree = GNT_TREE(box->dropdown);
197 GntTreeRow *current = tree->current;
198
199 SEARCH_IN_RANGE(gnt_tree_row_get_next(tree, current), NULL);
200 SEARCH_IN_RANGE(tree->top, current);
201
202 #undef SEARCH_IN_RANGE
203 }
204
205 return FALSE;
206 }
207
208 static void
gnt_combo_box_destroy(GntWidget * widget)209 gnt_combo_box_destroy(GntWidget *widget)
210 {
211 gnt_widget_destroy(GNT_COMBO_BOX(widget)->dropdown->parent);
212 }
213
214 static void
gnt_combo_box_lost_focus(GntWidget * widget)215 gnt_combo_box_lost_focus(GntWidget *widget)
216 {
217 GntComboBox *combo = GNT_COMBO_BOX(widget);
218 if (gnt_widget_get_mapped(combo->dropdown->parent))
219 hide_popup(combo, FALSE);
220 widget_lost_focus(widget);
221 }
222
223 static gboolean
gnt_combo_box_clicked(GntWidget * widget,GntMouseEvent event,int x,int y)224 gnt_combo_box_clicked(GntWidget *widget, GntMouseEvent event, int x, int y)
225 {
226 GntComboBox *box = GNT_COMBO_BOX(widget);
227 gboolean dshowing = gnt_widget_get_mapped(box->dropdown->parent);
228
229 if (event == GNT_MOUSE_SCROLL_UP) {
230 if (dshowing)
231 gnt_widget_key_pressed(box->dropdown, GNT_KEY_UP);
232 } else if (event == GNT_MOUSE_SCROLL_DOWN) {
233 if (dshowing)
234 gnt_widget_key_pressed(box->dropdown, GNT_KEY_DOWN);
235 } else if (event == GNT_LEFT_MOUSE_DOWN) {
236 if (dshowing) {
237 hide_popup(box, TRUE);
238 } else {
239 popup_dropdown(GNT_COMBO_BOX(widget));
240 }
241 } else
242 return FALSE;
243 return TRUE;
244 }
245
246 static void
gnt_combo_box_size_changed(GntWidget * widget,int oldw,int oldh)247 gnt_combo_box_size_changed(GntWidget *widget, int oldw, int oldh)
248 {
249 GntComboBox *box = GNT_COMBO_BOX(widget);
250 gnt_widget_set_size(box->dropdown, widget->priv.width - 1, box->dropdown->priv.height);
251 }
252
253 static gboolean
dropdown_menu(GntBindable * b,GList * null)254 dropdown_menu(GntBindable *b, GList *null)
255 {
256 if (gnt_widget_get_mapped(GNT_COMBO_BOX(b)->dropdown->parent))
257 return FALSE;
258 popup_dropdown(GNT_COMBO_BOX(b));
259 return TRUE;
260 }
261
262 static void
gnt_combo_box_class_init(GntComboBoxClass * klass)263 gnt_combo_box_class_init(GntComboBoxClass *klass)
264 {
265 GntBindableClass *bindable = GNT_BINDABLE_CLASS(klass);
266
267 parent_class = GNT_WIDGET_CLASS(klass);
268
269 parent_class->destroy = gnt_combo_box_destroy;
270 parent_class->draw = gnt_combo_box_draw;
271 parent_class->map = gnt_combo_box_map;
272 parent_class->size_request = gnt_combo_box_size_request;
273 parent_class->key_pressed = gnt_combo_box_key_pressed;
274 parent_class->clicked = gnt_combo_box_clicked;
275 parent_class->size_changed = gnt_combo_box_size_changed;
276
277 widget_lost_focus = parent_class->lost_focus;
278 parent_class->lost_focus = gnt_combo_box_lost_focus;
279
280 signals[SIG_SELECTION_CHANGED] =
281 g_signal_new("selection-changed",
282 G_TYPE_FROM_CLASS(klass),
283 G_SIGNAL_RUN_LAST,
284 0,
285 NULL, NULL,
286 gnt_closure_marshal_VOID__POINTER_POINTER,
287 G_TYPE_NONE, 2, G_TYPE_POINTER, G_TYPE_POINTER);
288
289 gnt_bindable_class_register_action(bindable, "dropdown", dropdown_menu,
290 GNT_KEY_DOWN, NULL);
291 gnt_bindable_register_binding(bindable, "dropdown", GNT_KEY_UP, NULL);
292
293 gnt_style_read_actions(G_OBJECT_CLASS_TYPE(klass), bindable);
294
295 GNTDEBUG;
296 }
297
298 static void
gnt_combo_box_init(GTypeInstance * instance,gpointer class)299 gnt_combo_box_init(GTypeInstance *instance, gpointer class)
300 {
301 GntWidget *box;
302 GntWidget *widget = GNT_WIDGET(instance);
303 GntComboBox *combo = GNT_COMBO_BOX(instance);
304
305 gnt_widget_set_grow_x(widget, TRUE);
306 gnt_widget_set_take_focus(widget, TRUE);
307 gnt_widget_set_has_shadow(widget, FALSE);
308 combo->dropdown = gnt_tree_new();
309
310 box = gnt_box_new(FALSE, FALSE);
311 gnt_widget_set_has_shadow(box, FALSE);
312 gnt_widget_set_has_border(box, FALSE);
313 gnt_widget_set_transient(box, TRUE);
314 gnt_box_set_pad(GNT_BOX(box), 0);
315 gnt_box_add_widget(GNT_BOX(box), combo->dropdown);
316
317 widget->priv.minw = 4;
318 widget->priv.minh = 3;
319 GNTDEBUG;
320 }
321
322 /******************************************************************************
323 * GntComboBox API
324 *****************************************************************************/
325 GType
gnt_combo_box_get_gtype(void)326 gnt_combo_box_get_gtype(void)
327 {
328 static GType type = 0;
329
330 if(type == 0)
331 {
332 static const GTypeInfo info = {
333 sizeof(GntComboBoxClass),
334 NULL, /* base_init */
335 NULL, /* base_finalize */
336 (GClassInitFunc)gnt_combo_box_class_init,
337 NULL, /* class_finalize */
338 NULL, /* class_data */
339 sizeof(GntComboBox),
340 0, /* n_preallocs */
341 gnt_combo_box_init, /* instance_init */
342 NULL /* value_table */
343 };
344
345 type = g_type_register_static(GNT_TYPE_WIDGET,
346 "GntComboBox",
347 &info, 0);
348 }
349
350 return type;
351 }
352
gnt_combo_box_new()353 GntWidget *gnt_combo_box_new()
354 {
355 GntWidget *widget = g_object_new(GNT_TYPE_COMBO_BOX, NULL);
356
357 return widget;
358 }
359
360 GntWidget *
gnt_combo_box_get_dropdown(GntComboBox * box)361 gnt_combo_box_get_dropdown(GntComboBox *box)
362 {
363 g_return_val_if_fail(GNT_IS_COMBO_BOX(box), NULL);
364
365 return box->dropdown;
366 }
367
gnt_combo_box_add_data(GntComboBox * box,gpointer key,const char * text)368 void gnt_combo_box_add_data(GntComboBox *box, gpointer key, const char *text)
369 {
370 gnt_tree_add_row_last(GNT_TREE(box->dropdown), key,
371 gnt_tree_create_row(GNT_TREE(box->dropdown), text), NULL);
372 if (box->selected == NULL)
373 set_selection(box, key);
374 }
375
gnt_combo_box_get_selected_data(GntComboBox * box)376 gpointer gnt_combo_box_get_selected_data(GntComboBox *box)
377 {
378 return box->selected;
379 }
380
gnt_combo_box_set_selected(GntComboBox * box,gpointer key)381 void gnt_combo_box_set_selected(GntComboBox *box, gpointer key)
382 {
383 set_selection(box, key);
384 }
385
gnt_combo_box_remove(GntComboBox * box,gpointer key)386 void gnt_combo_box_remove(GntComboBox *box, gpointer key)
387 {
388 gnt_tree_remove(GNT_TREE(box->dropdown), key);
389 if (box->selected == key)
390 set_selection(box, NULL);
391 }
392
gnt_combo_box_remove_all(GntComboBox * box)393 void gnt_combo_box_remove_all(GntComboBox *box)
394 {
395 gnt_tree_remove_all(GNT_TREE(box->dropdown));
396 set_selection(box, NULL);
397 }
398