Viewing file:  sizegroup.c (5.11 KB) -rw-r--r--
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/* Size Groups
*
* GtkSizeGroup provides a mechanism for grouping a number of
* widgets together so they all request the same amount of space.
* This is typically useful when you want a column of widgets to
* have the same size, but you can't use a GtkTable widget.
*
* Note that size groups only affect the amount of space requested,
* not the size that the widgets finally receive. If you want the
* widgets in a GtkSizeGroup to actually be the same size, you need
* to pack them in such a way that they get the size they request
* and not more. For example, if you are packing your widgets
* into a table, you would not include the GTK_FILL flag.
*/
#include <gtk/gtk.h>
static GtkWidget *window = NULL;
/* Convenience function to create a combo box holding a number of strings
*/
GtkWidget *
create_combo_box (const char **strings)
{
GtkWidget *combo_box;
const char **str;
combo_box = gtk_combo_box_new_text ();
for (str = strings; *str; str++)
gtk_combo_box_append_text (GTK_COMBO_BOX (combo_box), *str);
gtk_combo_box_set_active (GTK_COMBO_BOX (combo_box), 0);
return combo_box;
}
static void
add_row (GtkTable *table,
int row,
GtkSizeGroup *size_group,
const char *label_text,
const char **options)
{
GtkWidget *combo_box;
GtkWidget *label;
label = gtk_label_new_with_mnemonic (label_text);
gtk_misc_set_alignment (GTK_MISC (label), 0, 1);
gtk_table_attach (GTK_TABLE (table), label,
0, 1, row, row + 1,
GTK_EXPAND | GTK_FILL, 0,
0, 0);
combo_box = create_combo_box (options);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo_box);
gtk_size_group_add_widget (size_group, combo_box);
gtk_table_attach (GTK_TABLE (table), combo_box,
1, 2, row, row + 1,
0, 0,
0, 0);
}
static void
toggle_grouping (GtkToggleButton *check_button,
GtkSizeGroup *size_group)
{
GtkSizeGroupMode new_mode;
/* GTK_SIZE_GROUP_NONE is not generally useful, but is useful
* here to show the effect of GTK_SIZE_GROUP_HORIZONTAL by
* contrast.
*/
if (gtk_toggle_button_get_active (check_button))
new_mode = GTK_SIZE_GROUP_HORIZONTAL;
else
new_mode = GTK_SIZE_GROUP_NONE;
gtk_size_group_set_mode (size_group, new_mode);
}
GtkWidget *
do_sizegroup (GtkWidget *do_widget)
{
GtkWidget *table;
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *check_button;
GtkSizeGroup *size_group;
static const char *color_options[] = {
"Red", "Green", "Blue", NULL
};
static const char *dash_options[] = {
"Solid", "Dashed", "Dotted", NULL
};
static const char *end_options[] = {
"Square", "Round", "Arrow", NULL
};
if (!window)
{
window = gtk_dialog_new_with_buttons ("GtkSizeGroup",
GTK_WINDOW (do_widget),
0,
GTK_STOCK_CLOSE,
GTK_RESPONSE_NONE,
NULL);
gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
g_signal_connect (window, "response",
G_CALLBACK (gtk_widget_destroy), NULL);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
vbox = gtk_vbox_new (FALSE, 5);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (window)->vbox), vbox, TRUE, TRUE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 5);
size_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
/* Create one frame holding color options
*/
frame = gtk_frame_new ("Color Options");
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
table = gtk_table_new (2, 2, FALSE);
gtk_container_set_border_width (GTK_CONTAINER (table), 5);
gtk_table_set_row_spacings (GTK_TABLE (table), 5);
gtk_table_set_col_spacings (GTK_TABLE (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
add_row (GTK_TABLE (table), 0, size_group, "_Foreground", color_options);
add_row (GTK_TABLE (table), 1, size_group, "_Background", color_options);
/* And another frame holding line style options
*/
frame = gtk_frame_new ("Line Options");
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
table = gtk_table_new (2, 2, FALSE);
gtk_container_set_border_width (GTK_CONTAINER (table), 5);
gtk_table_set_row_spacings (GTK_TABLE (table), 5);
gtk_table_set_col_spacings (GTK_TABLE (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
add_row (GTK_TABLE (table), 0, size_group, "_Dashing", dash_options);
add_row (GTK_TABLE (table), 1, size_group, "_Line ends", end_options);
/* And a check button to turn grouping on and off */
check_button = gtk_check_button_new_with_mnemonic ("_Enable grouping");
gtk_box_pack_start (GTK_BOX (vbox), check_button, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check_button), TRUE);
g_signal_connect (check_button, "toggled",
G_CALLBACK (toggle_grouping), size_group);
}
if (!GTK_WIDGET_VISIBLE (window))
gtk_widget_show_all (window);
else
gtk_widget_destroy (window);
return window;
}
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