libyui-gtk  2.44.9
ygtktreeview.c
1 /********************************************************************
2  * YaST2-GTK - http://en.opensuse.org/YaST2-GTK *
3  ********************************************************************/
4 /* YGtkTreeView widget */
5 // check the header file for information about this widget
6 
7 /*
8  Textdomain "gtk"
9  */
10 
11 #include <yui/Libyui_config.h>
12 #include "ygtktreeview.h"
13 #include <gtk/gtk.h>
14 #define YGI18N_C
15 #include "YGi18n.h"
16 
17 extern char *ygutils_mapKBAccel (const char *src);
18 
19 static guint right_click_signal = 0;
20 
21 G_DEFINE_TYPE (YGtkTreeView, ygtk_tree_view, GTK_TYPE_TREE_VIEW)
22 
23 static void ygtk_tree_view_init (YGtkTreeView *view)
24 {
25 }
26 
27 static void ygtk_tree_view_finalize (GObject *object)
28 {
29  YGtkTreeView *view = YGTK_TREE_VIEW (object);
30  if (view->empty_text) {
31  g_free (view->empty_text);
32  view->empty_text = NULL;
33  }
34  G_OBJECT_CLASS (ygtk_tree_view_parent_class)->finalize (object);
35 }
36 
37 static void _gtk_widget_destroy (gpointer widget)
38 { gtk_widget_destroy (GTK_WIDGET (widget)); }
39 
40 static guint32 _popup_time = 0;
41 static gint _popup_x = 0, _popup_y = 0;
42 
43 /*
44 static void _ygtk_tree_view_menu_position_func (
45  GtkMenu *menu, gint *x, gint *y, gboolean *push_in, gpointer user_data)
46 { *x = _popup_x; *y = _popup_y; }
47 */
48 
49 void ygtk_tree_view_popup_menu (YGtkTreeView *view, GtkWidget *menu)
50 {
51  GtkWidget *widget = GTK_WIDGET (view);
52  // popup hack -- we can't destroy the menu at hide because it may not have
53  // emitted signals yet -- destroy it when replaced or the widget destroyed
54  g_object_set_data_full (G_OBJECT (view), "popup", menu, _gtk_widget_destroy);
55 
56  gtk_menu_attach_to_widget (GTK_MENU (menu), widget, NULL);
57 
58  // gtk_menu_popup (GTK_MENU (menu), NULL, NULL,
59  // _ygtk_tree_view_menu_position_func, widget, 3, _popup_time);
60  gtk_menu_popup_at_pointer (GTK_MENU (menu), NULL);
61 
62  gtk_widget_show_all (menu);
63 }
64 
65 static gboolean ygtk_tree_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
66 {
67  if (event->button == 3) {
68  GtkTreeView *view = GTK_TREE_VIEW (widget);
69  GtkTreePath *path;
70  gboolean outreach;
71  outreach = !gtk_tree_view_get_path_at_pos (view, event->x, event->y, &path, NULL, NULL, NULL);
72  if (!outreach) { // select row if it is not
73  GtkTreeSelection *selection = gtk_tree_view_get_selection (view);
74  GtkTreeModel *model = gtk_tree_view_get_model (view);
75  GtkTreeIter iter;
76  gtk_tree_model_get_iter (model, &iter, path);
77 
78  if (!gtk_tree_selection_iter_is_selected (selection, &iter))
79  gtk_tree_view_set_cursor (view, path, NULL, FALSE);
80  gtk_tree_path_free (path);
81  }
82 
83  _popup_time = event->time;
84  _popup_x = event->x_root; _popup_y = event->y_root;
85 
86  gtk_widget_grab_focus (widget);
87  g_signal_emit (widget, right_click_signal, 0, outreach);
88  return TRUE;
89  }
90  return GTK_WIDGET_CLASS (ygtk_tree_view_parent_class)->button_press_event (widget, event);
91 }
92 
93 static gboolean _ygtk_tree_view_popup_menu (GtkWidget *widget)
94 {
95  GtkTreeView *view = GTK_TREE_VIEW (widget);
96  GtkTreeSelection *selection = gtk_tree_view_get_selection (view);
97  gboolean outreach = gtk_tree_selection_count_selected_rows (selection) == 0;
98 
99  _popup_time = gtk_get_current_event_time();
100  if (outreach)
101  _popup_x = (_popup_y = 0);
102  else {
103  GList *rows = gtk_tree_selection_get_selected_rows (selection, NULL);
104  GtkTreePath *path = (GtkTreePath *) g_list_last (rows)->data;
105 
106  // in case that path is not visible:
107  gtk_tree_view_scroll_to_cell (view, path, NULL, FALSE, 0, 0);
108 
109  GdkRectangle rect;
110  gtk_tree_view_get_cell_area (view, path, NULL, &rect);
111  _popup_x = 0;
112  _popup_y = rect.y + rect.height;
113 
114  g_list_foreach (rows, (GFunc) gtk_tree_path_free, NULL);
115  g_list_free (rows);
116  }
117 
118  gtk_tree_view_convert_bin_window_to_widget_coords (
119  view, _popup_x, _popup_y, &_popup_x, &_popup_y);
120  gint x_orig, y_orig;
121  gdk_window_get_origin (gtk_widget_get_window(widget), &x_orig, &y_orig);
122  _popup_x += x_orig; _popup_y += y_orig;
123 
124  g_signal_emit (widget, right_click_signal, 0, outreach);
125  return TRUE;
126 }
127 
128 static gboolean _ygtk_tree_view_draw (GtkWidget *widget, cairo_t *cr)
129 {
130  GTK_WIDGET_CLASS (ygtk_tree_view_parent_class)->draw(widget, cr);
131 
132  GtkTreeView *view = GTK_TREE_VIEW (widget);
133  YGtkTreeView *yview = YGTK_TREE_VIEW (widget);
134  if (yview->empty_text) {
135  GtkTreeModel *model = gtk_tree_view_get_model (view);
136  GtkTreeIter iter;
137  if (!model || !gtk_tree_model_get_iter_first (model, &iter)) { // empty tree-view
138  const gchar *text = yview->empty_text;
139  if (!model)
140  text = _("Loading...");
141  PangoLayout *layout;
142  layout = gtk_widget_create_pango_layout (widget, text);
143 
144  PangoAttrList *attrs = pango_attr_list_new();
145  pango_attr_list_insert (attrs, pango_attr_foreground_new (160<<8, 160<<8, 160<<8));
146  pango_layout_set_attributes (layout, attrs);
147  pango_attr_list_unref (attrs);
148 
149  int width, height;
150  pango_layout_get_pixel_size (layout, &width, &height);
151  GtkAllocation allocation;
152  gtk_widget_get_allocation(widget, &allocation);
153  int x, y;
154  x = (allocation.width - width) / 2;
155  y = (allocation.height - height) / 2;
156  cairo_move_to (cr, x, y);
157 
158  pango_cairo_show_layout (cr, layout);
159  g_object_unref (layout);
160  }
161  }
162  return FALSE;
163 }
164 
165 static void show_column_cb (GtkCheckMenuItem *item, GtkTreeView *view)
166 {
167  int col = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (item), "column"));
168  GtkTreeViewColumn *column = gtk_tree_view_get_column (view, col);
169  gboolean visible = gtk_check_menu_item_get_active (item);
170  gtk_tree_view_column_set_visible (column, visible);
171 }
172 
173 GtkWidget *ygtk_tree_view_create_show_columns_menu (YGtkTreeView *view)
174 {
175  GtkWidget *menu = gtk_menu_new();
176  GList *columns = gtk_tree_view_get_columns (GTK_TREE_VIEW (view));
177  // see ygtk_tree_view_append_column(): we re-order arabic column insertion
178  gboolean reverse = gtk_widget_get_default_direction() == GTK_TEXT_DIR_RTL &&
179  gtk_widget_get_direction (GTK_WIDGET (view)) != GTK_TEXT_DIR_RTL;
180  int n;
181  GList *i;
182  for (n = 0, i = columns; i; i = i->next, n++) {
183  GtkTreeViewColumn *column = (GtkTreeViewColumn *) i->data;
184  const gchar *header = gtk_tree_view_column_get_title (column);
185  if (header) {
186  GtkWidget *item = gtk_check_menu_item_new_with_label (header);
187  g_object_set_data (G_OBJECT (item), "column", GINT_TO_POINTER (n));
188 
189  gboolean visible = gtk_tree_view_column_get_visible (column);
190  gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (item), visible);
191  g_signal_connect (G_OBJECT (item), "toggled",
192  G_CALLBACK (show_column_cb), view);
193 
194  if (reverse)
195  gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
196  else
197  gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
198 
199  // if the user were to remove all columns, the right-click would no longer work
200  if (n == 0 && !reverse)
201  gtk_widget_set_sensitive (item, FALSE);
202  }
203  }
204  g_list_free (columns);
205  return menu;
206 }
207 
208 GtkWidget *ygtk_tree_view_append_show_columns_item (YGtkTreeView *view, GtkWidget *menu)
209 {
210  if (!menu)
211  menu = gtk_menu_new();
212 
213  GList *children = gtk_container_get_children (GTK_CONTAINER (menu));
214  g_list_free (children);
215  if (children) // non-null if it has children (in which case, add separator)
216  gtk_menu_shell_append (GTK_MENU_SHELL (menu), gtk_separator_menu_item_new());
217 
218  GtkWidget *submenu = ygtk_tree_view_create_show_columns_menu (view);
219  char *label = ygutils_mapKBAccel (_("&Show column"));
220  GtkWidget *item = gtk_menu_item_new_with_mnemonic (label);
221  g_free (label);
222  gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
223  gtk_menu_item_set_submenu (GTK_MENU_ITEM (item), submenu);
224  return menu;
225 }
226 
227 void ygtk_tree_view_append_column (YGtkTreeView *view, GtkTreeViewColumn *column)
228 {
229  int pos = -1;
230  if (gtk_widget_get_default_direction() == GTK_TEXT_DIR_RTL) {
231  gtk_widget_set_direction (GTK_WIDGET (view), GTK_TEXT_DIR_LTR);
232 
233  GList *renderers = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (column)), *i;
234  for (i = renderers; i; i = i->next) {
235  GtkCellRenderer *renderer = (GtkCellRenderer *) i->data;
236  if (GTK_IS_CELL_RENDERER_TEXT (renderer)) {
237  PangoAlignment alignment;
238  g_object_get (G_OBJECT (renderer), "alignment", &alignment, NULL);
239  if (alignment == PANGO_ALIGN_LEFT)
240  alignment = PANGO_ALIGN_RIGHT;
241  else if (alignment == PANGO_ALIGN_RIGHT)
242  alignment = PANGO_ALIGN_LEFT;
243  g_object_set (G_OBJECT (renderer), "alignment", alignment, NULL);
244 
245  gfloat xalign;
246  g_object_get (G_OBJECT (renderer), "xalign", &xalign, NULL);
247  xalign = 1.0 - xalign;
248  g_object_set (G_OBJECT (renderer), "xalign", xalign, NULL);
249 
250  PangoEllipsizeMode ellipsize;
251  g_object_get (G_OBJECT (renderer), "ellipsize", &ellipsize, NULL);
252  if (ellipsize == PANGO_ELLIPSIZE_END)
253  ellipsize = PANGO_ELLIPSIZE_START;
254  else if (ellipsize == PANGO_ELLIPSIZE_START)
255  ellipsize = PANGO_ELLIPSIZE_END;
256  g_object_set (G_OBJECT (renderer), "ellipsize", ellipsize, NULL);
257  }
258  }
259  g_list_free (renderers);
260  pos = 0;
261  }
262  gtk_tree_view_insert_column (GTK_TREE_VIEW (view), column, pos);
263 }
264 
265 GtkTreeViewColumn *ygtk_tree_view_get_column (YGtkTreeView *view, gint nb)
266 {
267  GtkTreeViewColumn *column;
268  if (gtk_widget_get_default_direction() == GTK_TEXT_DIR_RTL) {
269  GList *columns = gtk_tree_view_get_columns (GTK_TREE_VIEW (view));
270  nb = g_list_length (columns) - nb - 1;
271  column = g_list_nth_data (columns, nb);
272  g_list_free (columns);
273  }
274  else
275  column = gtk_tree_view_get_column (GTK_TREE_VIEW (view), nb);
276  return column;
277 }
278 
279 
280 void ygtk_tree_view_set_empty_text (YGtkTreeView *view, const gchar *empty_text)
281 {
282  if (view->empty_text)
283  g_free (view->empty_text);
284  view->empty_text = empty_text ? g_strdup (empty_text) : NULL;
285 }
286 
287 GtkWidget *ygtk_tree_view_new (const gchar *empty_text)
288 {
289  YGtkTreeView *view = (YGtkTreeView *) g_object_new (YGTK_TYPE_TREE_VIEW, NULL);
290  view->empty_text = empty_text ? g_strdup (empty_text) : NULL;
291  return GTK_WIDGET (view);
292 }
293 
294 static void ygtk_tree_view_class_init (YGtkTreeViewClass *klass)
295 {
296  GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
297  gtkwidget_class->button_press_event = ygtk_tree_view_button_press_event;
298  gtkwidget_class->popup_menu = _ygtk_tree_view_popup_menu;
299  gtkwidget_class->draw = _ygtk_tree_view_draw;
300 
301  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
302  gobject_class->finalize = ygtk_tree_view_finalize;
303 
304  right_click_signal = g_signal_new ("right-click",
305  G_OBJECT_CLASS_TYPE (klass), G_SIGNAL_RUN_LAST,
306  G_STRUCT_OFFSET (YGtkTreeViewClass, right_click),
307  NULL, NULL, g_cclosure_marshal_VOID__BOOLEAN, G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
308 }
309 
_YGtkTreeViewClass
Definition: ygtktreeview.h:34
_YGtkTreeView
Definition: ygtktreeview.h:26