455 lines
11 KiB
C
455 lines
11 KiB
C
/* Combo boxes
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*
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* The ComboBox widget allows to select one option out of a list.
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* The ComboBoxEntry additionally allows the user to enter a value
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* that is not in the list of options.
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*
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* How the options are displayed is controlled by cell renderers.
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*/
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#include <gtk/gtk.h>
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enum
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{
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PIXBUF_COL,
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TEXT_COL
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};
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static gchar *
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strip_underscore (const gchar *text)
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{
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gchar *p, *q;
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gchar *result;
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result = g_strdup (text);
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p = q = result;
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while (*p)
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{
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if (*p != '_')
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{
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*q = *p;
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q++;
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}
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p++;
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}
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*q = '\0';
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return result;
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}
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static GtkTreeModel *
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create_stock_icon_store (void)
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{
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gchar *stock_id[6] = {
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GTK_STOCK_DIALOG_WARNING,
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GTK_STOCK_STOP,
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GTK_STOCK_NEW,
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GTK_STOCK_CLEAR,
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NULL,
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GTK_STOCK_OPEN
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};
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GtkStockItem item;
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GdkPixbuf *pixbuf;
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GtkWidget *cellview;
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GtkTreeIter iter;
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GtkListStore *store;
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gchar *label;
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gint i;
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cellview = gtk_cell_view_new ();
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store = gtk_list_store_new (2, GDK_TYPE_PIXBUF, G_TYPE_STRING);
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for (i = 0; i < G_N_ELEMENTS (stock_id); i++)
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{
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if (stock_id[i])
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{
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pixbuf = gtk_widget_render_icon (cellview, stock_id[i],
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GTK_ICON_SIZE_BUTTON, NULL);
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gtk_stock_lookup (stock_id[i], &item);
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label = strip_underscore (item.label);
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gtk_list_store_append (store, &iter);
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gtk_list_store_set (store, &iter,
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PIXBUF_COL, pixbuf,
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TEXT_COL, label,
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-1);
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g_object_unref (pixbuf);
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g_free (label);
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}
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else
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{
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gtk_list_store_append (store, &iter);
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gtk_list_store_set (store, &iter,
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PIXBUF_COL, NULL,
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TEXT_COL, "separator",
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-1);
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}
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}
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gtk_widget_destroy (cellview);
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return GTK_TREE_MODEL (store);
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}
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/* A GtkCellLayoutDataFunc that demonstrates how one can control
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* sensitivity of rows. This particular function does nothing
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* useful and just makes the second row insensitive.
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*/
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static void
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set_sensitive (GtkCellLayout *cell_layout,
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GtkCellRenderer *cell,
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GtkTreeModel *tree_model,
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GtkTreeIter *iter,
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gpointer data)
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{
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GtkTreePath *path;
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gint *indices;
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gboolean sensitive;
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path = gtk_tree_model_get_path (tree_model, iter);
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indices = gtk_tree_path_get_indices (path);
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sensitive = indices[0] != 1;
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gtk_tree_path_free (path);
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g_object_set (cell, "sensitive", sensitive, NULL);
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}
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/* A GtkTreeViewRowSeparatorFunc that demonstrates how rows can be
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* rendered as separators. This particular function does nothing
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* useful and just turns the fourth row into a separator.
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*/
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static gboolean
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is_separator (GtkTreeModel *model,
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GtkTreeIter *iter,
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gpointer data)
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{
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GtkTreePath *path;
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gboolean result;
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path = gtk_tree_model_get_path (model, iter);
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result = gtk_tree_path_get_indices (path)[0] == 4;
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gtk_tree_path_free (path);
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return result;
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}
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static GtkTreeModel *
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create_capital_store (void)
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{
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struct {
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gchar *group;
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gchar *capital;
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} capitals[] = {
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{ "A - B", NULL },
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{ NULL, "Albany" },
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{ NULL, "Annapolis" },
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{ NULL, "Atlanta" },
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{ NULL, "Augusta" },
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{ NULL, "Austin" },
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{ NULL, "Baton Rouge" },
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{ NULL, "Bismarck" },
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{ NULL, "Boise" },
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{ NULL, "Boston" },
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{ "C - D", NULL },
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{ NULL, "Carson City" },
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{ NULL, "Charleston" },
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{ NULL, "Cheyenne" },
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{ NULL, "Columbia" },
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{ NULL, "Columbus" },
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{ NULL, "Concord" },
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{ NULL, "Denver" },
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{ NULL, "Des Moines" },
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{ NULL, "Dover" },
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{ "E - J", NULL },
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{ NULL, "Frankfort" },
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{ NULL, "Harrisburg" },
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{ NULL, "Hartford" },
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{ NULL, "Helena" },
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{ NULL, "Honolulu" },
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{ NULL, "Indianapolis" },
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{ NULL, "Jackson" },
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{ NULL, "Jefferson City" },
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{ NULL, "Juneau" },
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{ "K - O" },
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{ NULL, "Lansing" },
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{ NULL, "Lincoln" },
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{ NULL, "Little Rock" },
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{ NULL, "Madison" },
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{ NULL, "Montgomery" },
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{ NULL, "Montpelier" },
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{ NULL, "Nashville" },
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{ NULL, "Oklahoma City" },
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{ NULL, "Olympia" },
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{ NULL, "P - S" },
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{ NULL, "Phoenix" },
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{ NULL, "Pierre" },
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{ NULL, "Providence" },
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{ NULL, "Raleigh" },
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{ NULL, "Richmond" },
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{ NULL, "Sacramento" },
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{ NULL, "Salem" },
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{ NULL, "Salt Lake City" },
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{ NULL, "Santa Fe" },
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{ NULL, "Springfield" },
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{ NULL, "St. Paul" },
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{ "T - Z", NULL },
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{ NULL, "Tallahassee" },
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{ NULL, "Topeka" },
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{ NULL, "Trenton" },
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{ NULL, NULL }
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};
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GtkTreeIter iter, iter2;
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GtkTreeStore *store;
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gint i;
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store = gtk_tree_store_new (1, G_TYPE_STRING);
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for (i = 0; capitals[i].group || capitals[i].capital; i++)
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{
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if (capitals[i].group)
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{
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gtk_tree_store_append (store, &iter, NULL);
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gtk_tree_store_set (store, &iter, 0, capitals[i].group, -1);
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}
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else if (capitals[i].capital)
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{
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gtk_tree_store_append (store, &iter2, &iter);
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gtk_tree_store_set (store, &iter2, 0, capitals[i].capital, -1);
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}
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}
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return GTK_TREE_MODEL (store);
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}
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static void
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is_capital_sensitive (GtkCellLayout *cell_layout,
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GtkCellRenderer *cell,
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GtkTreeModel *tree_model,
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GtkTreeIter *iter,
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gpointer data)
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{
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gboolean sensitive;
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sensitive = !gtk_tree_model_iter_has_child (tree_model, iter);
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g_object_set (cell, "sensitive", sensitive, NULL);
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}
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static void
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fill_combo_entry (GtkWidget *entry)
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{
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gtk_combo_box_append_text (GTK_COMBO_BOX (entry), "One");
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gtk_combo_box_append_text (GTK_COMBO_BOX (entry), "Two");
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gtk_combo_box_append_text (GTK_COMBO_BOX (entry), "2\302\275");
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gtk_combo_box_append_text (GTK_COMBO_BOX (entry), "Three");
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}
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/* A simple validating entry */
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#define TYPE_MASK_ENTRY (mask_entry_get_type ())
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#define MASK_ENTRY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_MASK_ENTRY, MaskEntry))
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#define MASK_ENTRY_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), TYPE_MASK_ENTRY, MaskEntryClass))
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#define IS_MASK_ENTRY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_MASK_ENTRY))
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#define IS_MASK_ENTRY_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), TYPE_MASK_ENTRY))
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#define MASK_ENTRY_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), TYPE_MASK_ENTRY, MaskEntryClass))
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typedef struct _MaskEntry MaskEntry;
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struct _MaskEntry
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{
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GtkEntry entry;
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gchar *mask;
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};
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typedef struct _MaskEntryClass MaskEntryClass;
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struct _MaskEntryClass
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{
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GtkEntryClass parent_class;
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};
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static void mask_entry_editable_init (GtkEditableClass *iface);
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G_DEFINE_TYPE_WITH_CODE (MaskEntry, mask_entry, GTK_TYPE_ENTRY,
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G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE,
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mask_entry_editable_init));
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static void
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mask_entry_set_background (MaskEntry *entry)
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{
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static const GdkColor error_color = { 0, 65535, 60000, 60000 };
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if (entry->mask)
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{
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if (!g_regex_match_simple (entry->mask, gtk_entry_get_text (GTK_ENTRY (entry)), 0, 0))
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{
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gtk_widget_modify_base (GTK_WIDGET (entry), GTK_STATE_NORMAL, &error_color);
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return;
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}
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}
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gtk_widget_modify_base (GTK_WIDGET (entry), GTK_STATE_NORMAL, NULL);
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}
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static void
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mask_entry_changed (GtkEditable *editable)
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{
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mask_entry_set_background (MASK_ENTRY (editable));
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}
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static void
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mask_entry_init (MaskEntry *entry)
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{
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entry->mask = NULL;
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}
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static void
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mask_entry_class_init (MaskEntryClass *klass)
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{ }
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static void
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mask_entry_editable_init (GtkEditableClass *iface)
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{
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iface->changed = mask_entry_changed;
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}
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GtkWidget *
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do_combobox (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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GtkWidget *vbox, *frame, *box, *combo, *entry;
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GtkTreeModel *model;
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GtkCellRenderer *renderer;
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GtkTreePath *path;
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GtkTreeIter iter;
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if (!window)
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{
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_screen (GTK_WINDOW (window),
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gtk_widget_get_screen (do_widget));
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gtk_window_set_title (GTK_WINDOW (window), "Combo boxes");
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_widget_destroyed),
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&window);
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gtk_container_set_border_width (GTK_CONTAINER (window), 10);
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vbox = gtk_vbox_new (FALSE, 2);
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gtk_container_add (GTK_CONTAINER (window), vbox);
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/* A combobox demonstrating cell renderers, separators and
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* insensitive rows
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*/
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frame = gtk_frame_new ("Some stock icons");
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gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
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box = gtk_vbox_new (FALSE, 0);
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gtk_container_set_border_width (GTK_CONTAINER (box), 5);
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gtk_container_add (GTK_CONTAINER (frame), box);
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model = create_stock_icon_store ();
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combo = gtk_combo_box_new_with_model (model);
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g_object_unref (model);
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gtk_container_add (GTK_CONTAINER (box), combo);
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renderer = gtk_cell_renderer_pixbuf_new ();
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gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, FALSE);
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gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), renderer,
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"pixbuf", PIXBUF_COL,
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NULL);
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gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (combo),
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renderer,
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set_sensitive,
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NULL, NULL);
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renderer = gtk_cell_renderer_text_new ();
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gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
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gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), renderer,
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"text", TEXT_COL,
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NULL);
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gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (combo),
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renderer,
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set_sensitive,
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NULL, NULL);
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gtk_combo_box_set_row_separator_func (GTK_COMBO_BOX (combo),
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is_separator, NULL, NULL);
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gtk_combo_box_set_active (GTK_COMBO_BOX (combo), 0);
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/* A combobox demonstrating trees.
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*/
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frame = gtk_frame_new ("Where are we ?");
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gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
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box = gtk_vbox_new (FALSE, 0);
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gtk_container_set_border_width (GTK_CONTAINER (box), 5);
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gtk_container_add (GTK_CONTAINER (frame), box);
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model = create_capital_store ();
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combo = gtk_combo_box_new_with_model (model);
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g_object_unref (model);
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gtk_container_add (GTK_CONTAINER (box), combo);
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renderer = gtk_cell_renderer_text_new ();
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gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
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gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), renderer,
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"text", 0,
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NULL);
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gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (combo),
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renderer,
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is_capital_sensitive,
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NULL, NULL);
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path = gtk_tree_path_new_from_indices (0, 8, -1);
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gtk_tree_model_get_iter (model, &iter, path);
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gtk_tree_path_free (path);
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gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo), &iter);
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/* A GtkComboBoxEntry with validation.
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*/
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frame = gtk_frame_new ("Editable");
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gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
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box = gtk_vbox_new (FALSE, 0);
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gtk_container_set_border_width (GTK_CONTAINER (box), 5);
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gtk_container_add (GTK_CONTAINER (frame), box);
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combo = gtk_combo_box_entry_new_text ();
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fill_combo_entry (combo);
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gtk_container_add (GTK_CONTAINER (box), combo);
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entry = g_object_new (TYPE_MASK_ENTRY, NULL);
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MASK_ENTRY (entry)->mask = "^([0-9]*|One|Two|2\302\275|Three)$";
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gtk_container_remove (GTK_CONTAINER (combo), GTK_BIN (combo)->child);
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gtk_container_add (GTK_CONTAINER (combo), entry);
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}
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if (!gtk_widget_get_visible (window))
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{
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gtk_widget_show_all (window);
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}
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else
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{
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gtk_widget_destroy (window);
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window = NULL;
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}
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return window;
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}
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