libyui-gtk  2.44.5
 All Classes Functions
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 static void _ygtk_tree_view_menu_position_func (
44  GtkMenu *menu, gint *x, gint *y, gboolean *push_in, gpointer user_data)
45 { *x = _popup_x; *y = _popup_y; }
46 
47 void ygtk_tree_view_popup_menu (YGtkTreeView *view, GtkWidget *menu)
48 {
49  GtkWidget *widget = GTK_WIDGET (view);
50  // popup hack -- we can't destroy the menu at hide because it may not have
51  // emitted signals yet -- destroy it when replaced or the widget destroyed
52  g_object_set_data_full (G_OBJECT (view), "popup", menu, _gtk_widget_destroy);
53 
54  gtk_menu_attach_to_widget (GTK_MENU (menu), widget, NULL);
55  gtk_menu_popup (GTK_MENU (menu), NULL, NULL,
56  _ygtk_tree_view_menu_position_func, widget, 3, _popup_time);
57  gtk_widget_show_all (menu);
58 }
59 
60 static gboolean ygtk_tree_view_button_press_event (GtkWidget *widget, GdkEventButton *event)
61 {
62  if (event->button == 3) {
63  GtkTreeView *view = GTK_TREE_VIEW (widget);
64  GtkTreePath *path;
65  gboolean outreach;
66  outreach = !gtk_tree_view_get_path_at_pos (view, event->x, event->y, &path, NULL, NULL, NULL);
67  if (!outreach) { // select row if it is not
68  GtkTreeSelection *selection = gtk_tree_view_get_selection (view);
69  GtkTreeModel *model = gtk_tree_view_get_model (view);
70  GtkTreeIter iter;
71  gtk_tree_model_get_iter (model, &iter, path);
72 
73  if (!gtk_tree_selection_iter_is_selected (selection, &iter))
74  gtk_tree_view_set_cursor (view, path, NULL, FALSE);
75  gtk_tree_path_free (path);
76  }
77 
78  _popup_time = event->time;
79  _popup_x = event->x_root; _popup_y = event->y_root;
80 
81  gtk_widget_grab_focus (widget);
82  g_signal_emit (widget, right_click_signal, 0, outreach);
83  return TRUE;
84  }
85  return GTK_WIDGET_CLASS (ygtk_tree_view_parent_class)->button_press_event (widget, event);
86 }
87 
88 static gboolean _ygtk_tree_view_popup_menu (GtkWidget *widget)
89 {
90  GtkTreeView *view = GTK_TREE_VIEW (widget);
91  GtkTreeSelection *selection = gtk_tree_view_get_selection (view);
92  gboolean outreach = gtk_tree_selection_count_selected_rows (selection) == 0;
93 
94  _popup_time = gtk_get_current_event_time();
95  if (outreach)
96  _popup_x = (_popup_y = 0);
97  else {
98  GList *rows = gtk_tree_selection_get_selected_rows (selection, NULL);
99  GtkTreePath *path = (GtkTreePath *) g_list_last (rows)->data;
100 
101  // in case that path is not visible:
102  gtk_tree_view_scroll_to_cell (view, path, NULL, FALSE, 0, 0);
103 
104  GdkRectangle rect;
105  gtk_tree_view_get_cell_area (view, path, NULL, &rect);
106  _popup_x = 0;
107  _popup_y = rect.y + rect.height;
108 
109  g_list_foreach (rows, (GFunc) gtk_tree_path_free, NULL);
110  g_list_free (rows);
111  }
112 
113  gtk_tree_view_convert_bin_window_to_widget_coords (
114  view, _popup_x, _popup_y, &_popup_x, &_popup_y);
115  gint x_orig, y_orig;
116  gdk_window_get_origin (gtk_widget_get_window(widget), &x_orig, &y_orig);
117  _popup_x += x_orig; _popup_y += y_orig;
118 
119  g_signal_emit (widget, right_click_signal, 0, outreach);
120  return TRUE;
121 }
122 
123 static gboolean _ygtk_tree_view_draw (GtkWidget *widget, cairo_t *cr)
124 {
125  GTK_WIDGET_CLASS (ygtk_tree_view_parent_class)->draw(widget, cr);
126 
127  GtkTreeView *view = GTK_TREE_VIEW (widget);
128  YGtkTreeView *yview = YGTK_TREE_VIEW (widget);
129  if (yview->empty_text) {
130  GtkTreeModel *model = gtk_tree_view_get_model (view);
131  GtkTreeIter iter;
132  if (!model || !gtk_tree_model_get_iter_first (model, &iter)) { // empty tree-view
133  const gchar *text = yview->empty_text;
134  if (!model)
135  text = _("Loading...");
136  PangoLayout *layout;
137  layout = gtk_widget_create_pango_layout (widget, text);
138 
139  PangoAttrList *attrs = pango_attr_list_new();
140  pango_attr_list_insert (attrs, pango_attr_foreground_new (160<<8, 160<<8, 160<<8));
141  pango_layout_set_attributes (layout, attrs);
142  pango_attr_list_unref (attrs);
143 
144  int width, height;
145  pango_layout_get_pixel_size (layout, &width, &height);
146  GtkAllocation allocation;
147  gtk_widget_get_allocation(widget, &allocation);
148  int x, y;
149  x = (allocation.width - width) / 2;
150  y = (allocation.height - height) / 2;
151  cairo_move_to (cr, x, y);
152 
153  pango_cairo_show_layout (cr, layout);
154  g_object_unref (layout);
155  }
156  }
157  return FALSE;
158 }
159 
160 static void show_column_cb (GtkCheckMenuItem *item, GtkTreeView *view)
161 {
162  int col = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (item), "column"));
163  GtkTreeViewColumn *column = gtk_tree_view_get_column (view, col);
164  gboolean visible = gtk_check_menu_item_get_active (item);
165  gtk_tree_view_column_set_visible (column, visible);
166 }
167 
168 GtkWidget *ygtk_tree_view_create_show_columns_menu (YGtkTreeView *view)
169 {
170  GtkWidget *menu = gtk_menu_new();
171  GList *columns = gtk_tree_view_get_columns (GTK_TREE_VIEW (view));
172  // see ygtk_tree_view_append_column(): we re-order arabic column insertion
173  gboolean reverse = gtk_widget_get_default_direction() == GTK_TEXT_DIR_RTL &&
174  gtk_widget_get_direction (GTK_WIDGET (view)) != GTK_TEXT_DIR_RTL;
175  int n;
176  GList *i;
177  for (n = 0, i = columns; i; i = i->next, n++) {
178  GtkTreeViewColumn *column = (GtkTreeViewColumn *) i->data;
179  const gchar *header = gtk_tree_view_column_get_title (column);
180  if (header) {
181  GtkWidget *item = gtk_check_menu_item_new_with_label (header);
182  g_object_set_data (G_OBJECT (item), "column", GINT_TO_POINTER (n));
183 
184  gboolean visible = gtk_tree_view_column_get_visible (column);
185  gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (item), visible);
186  g_signal_connect (G_OBJECT (item), "toggled",
187  G_CALLBACK (show_column_cb), view);
188 
189  if (reverse)
190  gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
191  else
192  gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
193 
194  // if the user were to remove all columns, the right-click would no longer work
195  if (n == 0 && !reverse)
196  gtk_widget_set_sensitive (item, FALSE);
197  }
198  }
199  g_list_free (columns);
200  return menu;
201 }
202 
203 GtkWidget *ygtk_tree_view_append_show_columns_item (YGtkTreeView *view, GtkWidget *menu)
204 {
205  if (!menu)
206  menu = gtk_menu_new();
207 
208  GList *children = gtk_container_get_children (GTK_CONTAINER (menu));
209  g_list_free (children);
210  if (children) // non-null if it has children (in which case, add separator)
211  gtk_menu_shell_append (GTK_MENU_SHELL (menu), gtk_separator_menu_item_new());
212 
213  GtkWidget *submenu = ygtk_tree_view_create_show_columns_menu (view);
214  char *label = ygutils_mapKBAccel (_("&Show column"));
215  GtkWidget *item = gtk_menu_item_new_with_mnemonic (label);
216  g_free (label);
217  gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
218  gtk_menu_item_set_submenu (GTK_MENU_ITEM (item), submenu);
219  return menu;
220 }
221 
222 void ygtk_tree_view_append_column (YGtkTreeView *view, GtkTreeViewColumn *column)
223 {
224  int pos = -1;
225  if (gtk_widget_get_default_direction() == GTK_TEXT_DIR_RTL) {
226  gtk_widget_set_direction (GTK_WIDGET (view), GTK_TEXT_DIR_LTR);
227 
228  GList *renderers = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (column)), *i;
229  for (i = renderers; i; i = i->next) {
230  GtkCellRenderer *renderer = (GtkCellRenderer *) i->data;
231  if (GTK_IS_CELL_RENDERER_TEXT (renderer)) {
232  PangoAlignment alignment;
233  g_object_get (G_OBJECT (renderer), "alignment", &alignment, NULL);
234  if (alignment == PANGO_ALIGN_LEFT)
235  alignment = PANGO_ALIGN_RIGHT;
236  else if (alignment == PANGO_ALIGN_RIGHT)
237  alignment = PANGO_ALIGN_LEFT;
238  g_object_set (G_OBJECT (renderer), "alignment", alignment, NULL);
239 
240  gfloat xalign;
241  g_object_get (G_OBJECT (renderer), "xalign", &xalign, NULL);
242  xalign = 1.0 - xalign;
243  g_object_set (G_OBJECT (renderer), "xalign", xalign, NULL);
244 
245  PangoEllipsizeMode ellipsize;
246  g_object_get (G_OBJECT (renderer), "ellipsize", &ellipsize, NULL);
247  if (ellipsize == PANGO_ELLIPSIZE_END)
248  ellipsize = PANGO_ELLIPSIZE_START;
249  else if (ellipsize == PANGO_ELLIPSIZE_START)
250  ellipsize = PANGO_ELLIPSIZE_END;
251  g_object_set (G_OBJECT (renderer), "ellipsize", ellipsize, NULL);
252  }
253  }
254  g_list_free (renderers);
255  pos = 0;
256  }
257  gtk_tree_view_insert_column (GTK_TREE_VIEW (view), column, pos);
258 }
259 
260 GtkTreeViewColumn *ygtk_tree_view_get_column (YGtkTreeView *view, gint nb)
261 {
262  GtkTreeViewColumn *column;
263  if (gtk_widget_get_default_direction() == GTK_TEXT_DIR_RTL) {
264  GList *columns = gtk_tree_view_get_columns (GTK_TREE_VIEW (view));
265  nb = g_list_length (columns) - nb - 1;
266  column = g_list_nth_data (columns, nb);
267  g_list_free (columns);
268  }
269  else
270  column = gtk_tree_view_get_column (GTK_TREE_VIEW (view), nb);
271  return column;
272 }
273 
274 
275 void ygtk_tree_view_set_empty_text (YGtkTreeView *view, const gchar *empty_text)
276 {
277  if (view->empty_text)
278  g_free (view->empty_text);
279  view->empty_text = empty_text ? g_strdup (empty_text) : NULL;
280 }
281 
282 GtkWidget *ygtk_tree_view_new (const gchar *empty_text)
283 {
284  YGtkTreeView *view = (YGtkTreeView *) g_object_new (YGTK_TYPE_TREE_VIEW, NULL);
285  view->empty_text = empty_text ? g_strdup (empty_text) : NULL;
286  return GTK_WIDGET (view);
287 }
288 
289 static void ygtk_tree_view_class_init (YGtkTreeViewClass *klass)
290 {
291  GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
292  gtkwidget_class->button_press_event = ygtk_tree_view_button_press_event;
293  gtkwidget_class->popup_menu = _ygtk_tree_view_popup_menu;
294  gtkwidget_class->draw = _ygtk_tree_view_draw;
295 
296  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
297  gobject_class->finalize = ygtk_tree_view_finalize;
298 
299  right_click_signal = g_signal_new ("right-click",
300  G_OBJECT_CLASS_TYPE (klass), G_SIGNAL_RUN_LAST,
301  G_STRUCT_OFFSET (YGtkTreeViewClass, right_click),
302  NULL, NULL, g_cclosure_marshal_VOID__BOOLEAN, G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
303 }
304