Viewing file:  combobox.c (9.23 KB) -rw-r--r--
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/* Combo boxes
*
* The ComboBox widget allows to select one option out of a list.
* The ComboBoxEntry additionally allows the user to enter a value
* that is not in the list of options.
*
* How the options are displayed is controlled by cell renderers.
*/
#include <gtk/gtk.h>
enum
{
PIXBUF_COL,
TEXT_COL
};
static gchar *
strip_underscore (const gchar *text)
{
gchar *p, *q;
gchar *result;
result = g_strdup (text);
p = q = result;
while (*p)
{
if (*p != '_')
{
*q = *p;
q++;
}
p++;
}
*q = '\0';
return result;
}
static GtkTreeModel *
create_stock_icon_store (void)
{
gchar *stock_id[6] = {
GTK_STOCK_DIALOG_WARNING,
GTK_STOCK_STOP,
GTK_STOCK_NEW,
GTK_STOCK_CLEAR,
NULL,
GTK_STOCK_OPEN
};
GtkStockItem item;
GdkPixbuf *pixbuf;
GtkWidget *cellview;
GtkTreeIter iter;
GtkListStore *store;
gchar *label;
gint i;
cellview = gtk_cell_view_new ();
store = gtk_list_store_new (2, GDK_TYPE_PIXBUF, G_TYPE_STRING);
for (i = 0; i < G_N_ELEMENTS (stock_id); i++)
{
if (stock_id[i])
{
pixbuf = gtk_widget_render_icon (cellview, stock_id[i],
GTK_ICON_SIZE_BUTTON, NULL);
gtk_stock_lookup (stock_id[i], &item);
label = strip_underscore (item.label);
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter,
PIXBUF_COL, pixbuf,
TEXT_COL, label,
-1);
g_free (label);
}
else
{
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter,
PIXBUF_COL, NULL,
TEXT_COL, "separator",
-1);
}
}
gtk_widget_destroy (cellview);
return GTK_TREE_MODEL (store);
}
/* A GtkCellLayoutDataFunc that demonstrates how one can control
* sensitivity of rows. This particular function does nothing
* useful and just makes the second row insensitive.
*/
static void
set_sensitive (GtkCellLayout *cell_layout,
GtkCellRenderer *cell,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gpointer data)
{
GtkTreePath *path;
gint *indices;
gboolean sensitive;
path = gtk_tree_model_get_path (tree_model, iter);
indices = gtk_tree_path_get_indices (path);
sensitive = indices[0] != 1;
gtk_tree_path_free (path);
g_object_set (cell, "sensitive", sensitive, NULL);
}
/* A GtkTreeViewRowSeparatorFunc that demonstrates how rows can be
* rendered as separators. This particular function does nothing
* useful and just turns the fourth row into a separator.
*/
static gboolean
is_separator (GtkTreeModel *model,
GtkTreeIter *iter,
gpointer data)
{
GtkTreePath *path;
gboolean result;
path = gtk_tree_model_get_path (model, iter);
result = gtk_tree_path_get_indices (path)[0] == 4;
gtk_tree_path_free (path);
return result;
}
static GtkTreeModel *
create_capital_store (void)
{
struct {
gchar *group;
gchar *capital;
} capitals[] = {
{ "A - B", NULL },
{ NULL, "Albany" },
{ NULL, "Annapolis" },
{ NULL, "Atlanta" },
{ NULL, "Augusta" },
{ NULL, "Austin" },
{ NULL, "Baton Rouge" },
{ NULL, "Bismarck" },
{ NULL, "Boise" },
{ NULL, "Boston" },
{ "C - D", NULL },
{ NULL, "Carson City" },
{ NULL, "Charleston" },
{ NULL, "Cheyenne" },
{ NULL, "Columbia" },
{ NULL, "Columbus" },
{ NULL, "Concord" },
{ NULL, "Denver" },
{ NULL, "Des Moines" },
{ NULL, "Dover" },
{ "E - J", NULL },
{ NULL, "Frankfort" },
{ NULL, "Harrisburg" },
{ NULL, "Hartford" },
{ NULL, "Helena" },
{ NULL, "Honolulu" },
{ NULL, "Indianapolis" },
{ NULL, "Jackson" },
{ NULL, "Jefferson City" },
{ NULL, "Juneau" },
{ "K - O" },
{ NULL, "Lansing" },
{ NULL, "Lincoln" },
{ NULL, "Little Rock" },
{ NULL, "Madison" },
{ NULL, "Montgomery" },
{ NULL, "Montpelier" },
{ NULL, "Nashville" },
{ NULL, "Oklahoma City" },
{ NULL, "Olympia" },
{ NULL, "P - S" },
{ NULL, "Phoenix" },
{ NULL, "Pierre" },
{ NULL, "Providence" },
{ NULL, "Raleigh" },
{ NULL, "Richmond" },
{ NULL, "Sacramento" },
{ NULL, "Salem" },
{ NULL, "Salt Lake City" },
{ NULL, "Santa Fe" },
{ NULL, "Springfield" },
{ NULL, "St. Paul" },
{ "T - Z", NULL },
{ NULL, "Tallahassee" },
{ NULL, "Topeka" },
{ NULL, "Trenton" },
{ NULL, NULL }
};
GtkTreeIter iter, iter2;
GtkTreeStore *store;
gint i;
store = gtk_tree_store_new (1, G_TYPE_STRING);
for (i = 0; capitals[i].group || capitals[i].capital; i++)
{
if (capitals[i].group)
{
gtk_tree_store_append (store, &iter, NULL);
gtk_tree_store_set (store, &iter, 0, capitals[i].group, -1);
}
else if (capitals[i].capital)
{
gtk_tree_store_append (store, &iter2, &iter);
gtk_tree_store_set (store, &iter2, 0, capitals[i].capital, -1);
}
}
return GTK_TREE_MODEL (store);
}
static void
is_capital_sensitive (GtkCellLayout *cell_layout,
GtkCellRenderer *cell,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gpointer data)
{
gboolean sensitive;
sensitive = !gtk_tree_model_iter_has_child (tree_model, iter);
g_object_set (cell, "sensitive", sensitive, NULL);
}
static void
fill_combo_entry (GtkWidget *entry)
{
gtk_combo_box_append_text (GTK_COMBO_BOX (entry), "One");
gtk_combo_box_append_text (GTK_COMBO_BOX (entry), "Two");
gtk_combo_box_append_text (GTK_COMBO_BOX (entry), "2\302\275");
gtk_combo_box_append_text (GTK_COMBO_BOX (entry), "Three");
}
GtkWidget *
do_combobox (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
GtkWidget *vbox, *frame, *box, *combo;
GtkTreeModel *model;
GtkCellRenderer *renderer;
GtkTreePath *path;
GtkTreeIter iter;
if (!window)
{
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_screen (GTK_WINDOW (window),
gtk_widget_get_screen (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Combo boxes");
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&window);
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
vbox = gtk_vbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (window), vbox);
/* A combobox demonstrating cell renderers, separators and
* insensitive rows
*/
frame = gtk_frame_new ("Some stock icons");
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
box = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (box), 5);
gtk_container_add (GTK_CONTAINER (frame), box);
model = create_stock_icon_store ();
combo = gtk_combo_box_new_with_model (model);
g_object_unref (model);
gtk_container_add (GTK_CONTAINER (box), combo);
renderer = gtk_cell_renderer_pixbuf_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, FALSE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), renderer,
"pixbuf", PIXBUF_COL,
NULL);
gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (combo),
renderer,
set_sensitive,
NULL, NULL);
renderer = gtk_cell_renderer_text_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), renderer,
"text", TEXT_COL,
NULL);
gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (combo),
renderer,
set_sensitive,
NULL, NULL);
gtk_combo_box_set_row_separator_func (GTK_COMBO_BOX (combo),
is_separator, NULL, NULL);
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), 0);
/* A combobox demonstrating trees.
*/
frame = gtk_frame_new ("Where are we ?");
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
box = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (box), 5);
gtk_container_add (GTK_CONTAINER (frame), box);
model = create_capital_store ();
combo = gtk_combo_box_new_with_model (model);
g_object_unref (model);
gtk_container_add (GTK_CONTAINER (box), combo);
renderer = gtk_cell_renderer_text_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), renderer,
"text", 0,
NULL);
gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (combo),
renderer,
is_capital_sensitive,
NULL, NULL);
path = gtk_tree_path_new_from_indices (0, 8, -1);
gtk_tree_model_get_iter (model, &iter, path);
gtk_tree_path_free (path);
gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo), &iter);
/* A GtkComboBoxEntry
*/
frame = gtk_frame_new ("Editable");
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
box = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (box), 5);
gtk_container_add (GTK_CONTAINER (frame), box);
combo = gtk_combo_box_entry_new_text ();
fill_combo_entry (combo);
gtk_container_add (GTK_CONTAINER (box), combo);
}
if (!GTK_WIDGET_VISIBLE (window))
{
gtk_widget_show_all (window);
}
else
{
gtk_widget_destroy (window);
window = NULL;
}
return window;
}
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