Tanya 184 : Contoh Penggunaan GtkComboBoxEntry (2)

Tanya :
Bisa berikan contoh penggunaan GtkComboBoxEntry ?
Jawab :
Berikut kode yang diambil dari http://tadeboro.blogspot.com/

[sourcecode languange=”cpp”]
/* Test me with:
*   gcc -o combo combo.c $(pkg-config –cflags –libs gtk+-2.0) && ./combo
*/
#include <gtk/gtk.h>
/* This function gets called when currently selected item changes */
static void
cb_changed( GtkComboBox *combo,
gpointer     data )
{
/* Obtain currently selected string from combo box */
gchar *string = gtk_combo_box_get_active_text( combo );
/* Print it to the console – if nothing is selected, print NULL */
g_print( "Selected (simple): >> %s <<\n", ( string ? string : "NULL" ) );
/* Free string */
g_free( string );
}
/* This function deletes currently selected item from combo box */
static void
cb_delete( GtkButton   *button,
GtkComboBox *combo )
{
gint index;
/* Get currently selected item’s index */
index = gtk_combo_box_get_active( combo );
/* Remove this item from combo */
gtk_combo_box_remove_text( combo, index );
}
int
main( int    argc,
char **argv )
{
/*Common variables */
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *frame;
GtkWidget *combo;
GtkWidget *button;
/* Initialization */
gtk_init( &argc, &argv );
/* Create main window */
window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
g_signal_connect( G_OBJECT( window ), "destroy",
G_CALLBACK( gtk_main_quit ), NULL );
gtk_container_set_border_width( GTK_CONTAINER( window ), 10 );
/* Create vbox */
vbox = gtk_vbox_new( FALSE, 6 );
gtk_container_add( GTK_CONTAINER( window ), vbox );
/* Create frame */
frame = gtk_frame_new( "Text API" );
gtk_box_pack_start( GTK_BOX( vbox ), frame, FALSE, FALSE, 0 );
/* Create combo box using text API and add some data to it */
combo = gtk_combo_box_new_text();
gtk_container_add( GTK_CONTAINER( frame ), combo );
gtk_combo_box_append_text( GTK_COMBO_BOX( combo ), "Hello World once" );
gtk_combo_box_prepend_text( GTK_COMBO_BOX( combo ), "Hello World twice" );
gtk_combo_box_insert_text( GTK_COMBO_BOX( combo ), 1, "Hello World last time" );
/* Connect signal to tour handler function */
g_signal_connect( G_OBJECT( combo ), "changed",
G_CALLBACK( cb_changed ), NULL );
/* Add button that, when clicked, deletes currently selected entry */
button = gtk_button_new_with_mnemonic( "_Delete selected item" );
gtk_box_pack_start( GTK_BOX( vbox ), button, FALSE, FALSE, 0 );
g_signal_connect( G_OBJECT( button ), "clicked",
G_CALLBACK( cb_delete ), GTK_COMBO_BOX( combo ) );
/* Show our application and start main loop */
gtk_widget_show_all( window );
gtk_main();
return( 0 );
}
[/sourcecode]