/src/wrappers/gtk/examples/gtk-demo/editable_cells.e

  1indexing
  2	description: "."
  3	copyright: "[
  4					Copyright (C) 2006 Paolo Redaelli, GTK+ team
  5					
  6					This library is free software; you can redistribute it and/or
  7					modify it under the terms of the GNU Lesser General Public License
  8					as published by the Free Software Foundation; either version 2.1 of
  9					the License, or (at your option) any later version.
 10					
 11					This library is distributed in the hope that it will be useful, but
 12					WITHOUT ANY WARRANTY; without even the implied warranty of
 13					MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 14					Lesser General Public License for more details.
 15
 16					You should have received a copy of the GNU Lesser General Public
 17					License along with this library; if not, write to the Free Software
 18					Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 19					02110-1301 USA
 20			]"
 21
 22class EDITABLE_CELLS
 23
 24creation make
 25
 26feature
 27-- /* Tree View/Editable Cells
 28--  *
 29--  * This demo demonstrates the use of editable cells in a GtkTreeView. If
 30--  * you're new to the GtkTreeView widgets and associates, look into
 31--  * the GtkListStore example first. It also shows how to use the
 32--  * GtkCellRenderer::editing-started signal to do custom setup of the
 33--  * editable widget.
 34--  *
 35--  * The cell renderers used in this demo are GtkCellRendererText, 
 36--  * GtkCellRendererCombo and GtkCellRendererProgress.
 37--  */
 38
 39-- #include <gtk/gtk.h>
 40-- #include <string.h>
 41-- #include <stdlib.h>
 42
 43-- static GtkWidget *window = NULL;
 44
 45-- typedef struct
 46-- {
 47--   gint   number;
 48--   gchar *product;
 49--   gint   yummy;
 50-- }
 51-- Item;
 52
 53-- enum
 54-- {
 55--   COLUMN_ITEM_NUMBER,
 56--   COLUMN_ITEM_PRODUCT,
 57--   COLUMN_ITEM_YUMMY,
 58--   NUM_ITEM_COLUMNS
 59-- };
 60
 61-- enum
 62-- {
 63--   COLUMN_NUMBER_TEXT,
 64--   NUM_NUMBER_COLUMNS
 65-- };
 66
 67-- static GArray *articles = NULL;
 68
 69-- static void
 70-- add_items (void)
 71-- {
 72--   Item foo;
 73
 74--   g_return_if_fail (articles != NULL);
 75
 76--   foo.number = 3;
 77--   foo.product = g_strdup ("bottles of coke");
 78--   foo.yummy = 20;
 79--   g_array_append_vals (articles, &foo, 1);
 80
 81--   foo.number = 5;
 82--   foo.product = g_strdup ("packages of noodles");
 83--   foo.yummy = 50;
 84--   g_array_append_vals (articles, &foo, 1);
 85
 86--   foo.number = 2;
 87--   foo.product = g_strdup ("packages of chocolate chip cookies");
 88--   foo.yummy = 90;
 89--   g_array_append_vals (articles, &foo, 1);
 90
 91--   foo.number = 1;
 92--   foo.product = g_strdup ("can vanilla ice cream");
 93--   foo.yummy = 60;
 94--   g_array_append_vals (articles, &foo, 1);
 95
 96--   foo.number = 6;
 97--   foo.product = g_strdup ("eggs");
 98--   foo.yummy = 10;
 99--   g_array_append_vals (articles, &foo, 1);
100-- }
101
102-- static GtkTreeModel *
103-- create_items_model (void)
104-- {
105--   gint i = 0;
106--   GtkListStore *model;
107--   GtkTreeIter iter;
108
109--   /* create array */
110--   articles = g_array_sized_new (FALSE, FALSE, sizeof (Item), 1);
111
112--   add_items ();
113
114--   /* create list store */
115--   model = gtk_list_store_new (NUM_ITEM_COLUMNS, G_TYPE_INT, G_TYPE_STRING,
116--                               G_TYPE_INT, G_TYPE_BOOLEAN);
117
118--   /* add items */
119--   for (i = 0; i < articles->len; i++)
120--     {
121--       gtk_list_store_append (model, &iter);
122
123--       gtk_list_store_set (model, &iter,
124--                           COLUMN_ITEM_NUMBER,
125--                           g_array_index (articles, Item, i).number,
126--                           COLUMN_ITEM_PRODUCT,
127--                           g_array_index (articles, Item, i).product,
128--                           COLUMN_ITEM_YUMMY,
129--                           g_array_index (articles, Item, i).yummy,
130--                           -1);
131--     }
132
133--   return GTK_TREE_MODEL (model);
134-- }
135
136-- static GtkTreeModel *
137-- create_numbers_model (void)
138-- {
139-- #define N_NUMBERS 10
140--   gint i = 0;
141--   GtkListStore *model;
142--   GtkTreeIter iter;
143
144--   /* create list store */
145--   model = gtk_list_store_new (NUM_NUMBER_COLUMNS, G_TYPE_STRING, G_TYPE_INT);
146
147--   /* add numbers */
148--   for (i = 0; i < N_NUMBERS; i++)
149--     {
150--       char str[2] = { '0' + i, '\0' };
151
152--       gtk_list_store_append (model, &iter);
153
154--       gtk_list_store_set (model, &iter,
155--                           COLUMN_NUMBER_TEXT, str,
156--                           -1);
157--     }
158
159--   return GTK_TREE_MODEL (model);
160
161-- #undef N_NUMBERS
162-- }
163
164-- static void
165-- add_item (GtkWidget *button, gpointer data)
166-- {
167--   Item foo;
168--   GtkTreeIter iter;
169--   GtkTreeModel *model = (GtkTreeModel *)data;
170
171--   g_return_if_fail (articles != NULL);
172
173--   foo.number = 0;
174--   foo.product = g_strdup ("Description here");
175--   foo.yummy = 50;
176--   g_array_append_vals (articles, &foo, 1);
177
178--   gtk_list_store_append (GTK_LIST_STORE (model), &iter);
179--   gtk_list_store_set (GTK_LIST_STORE (model), &iter,
180--                       COLUMN_ITEM_NUMBER, foo.number,
181--                       COLUMN_ITEM_PRODUCT, foo.product,
182--                       COLUMN_ITEM_YUMMY, foo.yummy,
183--                       -1);
184-- }
185
186-- static void
187-- remove_item (GtkWidget *widget, gpointer data)
188-- {
189--   GtkTreeIter iter;
190--   GtkTreeView *treeview = (GtkTreeView *)data;
191--   GtkTreeModel *model = gtk_tree_view_get_model (treeview);
192--   GtkTreeSelection *selection = gtk_tree_view_get_selection (treeview);
193
194--   if (gtk_tree_selection_get_selected (selection, NULL, &iter))
195--     {
196--       gint i;
197--       GtkTreePath *path;
198
199--       path = gtk_tree_model_get_path (model, &iter);
200--       i = gtk_tree_path_get_indices (path)[0];
201--       gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
202
203--       g_array_remove_index (articles, i);
204
205--       gtk_tree_path_free (path);
206--     }
207-- }
208
209-- static gboolean
210-- separator_row (GtkTreeModel *model,
211--                GtkTreeIter  *iter,
212--                gpointer      data)
213-- {
214--   GtkTreePath *path;
215--   gint idx;
216
217--   path = gtk_tree_model_get_path (model, iter);
218--   idx = gtk_tree_path_get_indices (path)[0];
219
220--   gtk_tree_path_free (path);
221
222--   return idx == 5;
223-- }
224
225-- static void
226-- editing_started (GtkCellRenderer *cell,
227--                  GtkCellEditable *editable,
228--                  const gchar     *path,
229--                  gpointer         data)
230-- {
231--   gtk_combo_box_set_row_separator_func (GTK_COMBO_BOX (editable), 
232--                                         separator_row, NULL, NULL);
233-- }
234
235-- static void
236-- cell_edited (GtkCellRendererText *cell,
237--              const gchar         *path_string,
238--              const gchar         *new_text,
239--              gpointer             data)
240-- {
241--   GtkTreeModel *model = (GtkTreeModel *)data;
242--   GtkTreePath *path = gtk_tree_path_new_from_string (path_string);
243--   GtkTreeIter iter;
244
245--   gint column = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (cell), "column"));
246
247--   gtk_tree_model_get_iter (model, &iter, path);
248
249--   switch (column)
250--     {
251--     case COLUMN_ITEM_NUMBER:
252--       {
253--         gint i;
254
255--         i = gtk_tree_path_get_indices (path)[0];
256--         g_array_index (articles, Item, i).number = atoi (new_text);
257
258--         gtk_list_store_set (GTK_LIST_STORE (model), &iter, column,
259--                             g_array_index (articles, Item, i).number, -1);
260--       }
261--       break;
262
263--     case COLUMN_ITEM_PRODUCT:
264--       {
265--         gint i;
266--         gchar *old_text;
267
268--         gtk_tree_model_get (model, &iter, column, &old_text, -1);
269--         g_free (old_text);
270
271--         i = gtk_tree_path_get_indices (path)[0];
272--         g_free (g_array_index (articles, Item, i).product);
273--         g_array_index (articles, Item, i).product = g_strdup (new_text);
274
275--         gtk_list_store_set (GTK_LIST_STORE (model), &iter, column,
276--                             g_array_index (articles, Item, i).product, -1);
277--       }
278--       break;
279--     }
280
281--   gtk_tree_path_free (path);
282-- }
283
284-- static void
285-- add_columns (GtkTreeView  *treeview, 
286--              GtkTreeModel *items_model,
287--              GtkTreeModel *numbers_model)
288-- {
289--   GtkCellRenderer *renderer;
290
291--   /* number column */
292--   renderer = gtk_cell_renderer_combo_new ();
293--   g_object_set (renderer,
294--                 "model", numbers_model,
295--                 "text-column", COLUMN_NUMBER_TEXT,
296--                 "has-entry", FALSE,
297--                 "editable", TRUE,
298--                 NULL);
299--   g_signal_connect (renderer, "edited",
300--                     G_CALLBACK (cell_edited), items_model);
301--   g_signal_connect (renderer, "editing-started",
302--                     G_CALLBACK (editing_started), NULL);
303--   g_object_set_data (G_OBJECT (renderer), "column", GINT_TO_POINTER (COLUMN_ITEM_NUMBER));
304
305--   gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
306--                                                -1, "Number", renderer,
307--                                                "text", COLUMN_ITEM_NUMBER,
308--                                                NULL);
309
310--   /* product column */
311--   renderer = gtk_cell_renderer_text_new ();
312--   g_object_set (renderer,
313--                 "editable", TRUE,
314--                 NULL);
315--   g_signal_connect (renderer, "edited",
316--                     G_CALLBACK (cell_edited), items_model);
317--   g_object_set_data (G_OBJECT (renderer), "column", GINT_TO_POINTER (COLUMN_ITEM_PRODUCT));
318
319--   gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
320--                                                -1, "Product", renderer,
321--                                                "text", COLUMN_ITEM_PRODUCT,
322--                                                NULL);
323
324--   /* yummy column */
325--   renderer = gtk_cell_renderer_progress_new ();
326--   g_object_set_data (G_OBJECT (renderer), "column", GINT_TO_POINTER (COLUMN_ITEM_YUMMY));
327
328--   gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
329--                                                -1, "Yummy", renderer,
330--                                                "value", COLUMN_ITEM_YUMMY,
331--                                                NULL);
332  
333
334-- }
335
336-- GtkWidget *
337-- do_editable_cells (GtkWidget *do_widget)
338-- {
339--   if (!window)
340--     {
341--       GtkWidget *vbox;
342--       GtkWidget *hbox;
343--       GtkWidget *sw;
344--       GtkWidget *treeview;
345--       GtkWidget *button;
346--       GtkTreeModel *items_model;
347--       GtkTreeModel *numbers_model;
348
349--       /* create window, etc */
350--       window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
351--       gtk_window_set_screen (GTK_WINDOW (window),
352--                              gtk_widget_get_screen (do_widget));
353--       gtk_window_set_title (GTK_WINDOW (window), "Shopping list");
354--       gtk_container_set_border_width (GTK_CONTAINER (window), 5);
355--       g_signal_connect (window, "destroy",
356--                         G_CALLBACK (gtk_widget_destroyed), &window);
357
358--       vbox = gtk_vbox_new (FALSE, 5);
359--       gtk_container_add (GTK_CONTAINER (window), vbox);
360
361--       gtk_box_pack_start (GTK_BOX (vbox),
362--                           gtk_label_new ("Shopping list (you can edit the cells!)"),
363--                           FALSE, FALSE, 0);
364
365--       sw = gtk_scrolled_window_new (NULL, NULL);
366--       gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
367--                                            GTK_SHADOW_ETCHED_IN);
368--       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
369--                                       GTK_POLICY_AUTOMATIC,
370--                                       GTK_POLICY_AUTOMATIC);
371--       gtk_box_pack_start (GTK_BOX (vbox), sw, TRUE, TRUE, 0);
372
373--       /* create models */
374--       items_model = create_items_model ();
375--       numbers_model = create_numbers_model ();
376
377--       /* create tree view */
378--       treeview = gtk_tree_view_new_with_model (items_model);
379--       gtk_tree_view_set_rules_hint (GTK_TREE_VIEW (treeview), TRUE);
380--       gtk_tree_selection_set_mode (gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview)),
381--                                    GTK_SELECTION_SINGLE);
382
383--       add_columns (GTK_TREE_VIEW (treeview), items_model, numbers_model);
384
385--       g_object_unref (numbers_model);
386--       g_object_unref (items_model);
387
388--       gtk_container_add (GTK_CONTAINER (sw), treeview);
389
390--       /* some buttons */
391--       hbox = gtk_hbox_new (TRUE, 4);
392--       gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
393
394--       button = gtk_button_new_with_label ("Add item");
395--       g_signal_connect (button, "clicked",
396--                         G_CALLBACK (add_item), items_model);
397--       gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
398
399--       button = gtk_button_new_with_label ("Remove item");
400--       g_signal_connect (button, "clicked",
401--                         G_CALLBACK (remove_item), treeview);
402--       gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
403
404--       gtk_window_set_default_size (GTK_WINDOW (window), 320, 200);
405--     }
406
407--   if (!GTK_WIDGET_VISIBLE (window))
408--     gtk_widget_show_all (window);
409--   else
410--     {
411--       gtk_widget_destroy (window);
412--       window = NULL;
413--     }
414
415--   return window;
416-- }
417end