[sourcecode languange=”cpp”]
/*
* Test me with:
* gcc -o combo2 combo2.c $(pkg-config –cflags –libs gtk+-2.0) && ./combo2
*/
[/sourcecode]
[sourcecode language=”cpp”]
#include <gtk/gtk.h>
/* This enumeration simplifies using data store, since column numbers can be
* accessed via more meaningful names. */
enum
{
/* Text related columns */
TEXT_C = 0, /* Column with text strings */
TEXT_VIS_C, /* Visibility column for text strings */
TEXT_COL_C, /* Text color column */
/* Image related columns */
PIXBUF_C, /* Column with GdkPixbufs */
PIXBUF_VIS_C, /* Visibility column for pixbufs */
/* Progress renderer related columns */
PROGRESS_C, /* Column with progress information [0, 100] */
PROGRESS_VIS_C, /* Column with progress visibility */
/* Last element of enumeration holds the number of columns */
N_COLS
};
/* Structure that holds widgets we need in our callback functions. */
typedef struct _Data Data;
struct _Data
{
GtkWidget *combo; /* Our combo box */
GtkTreeModel *store; /* Just a conveniance to avoid calling
gtk_combo_box_get_model every time we need to
access to data. */
/* Check buttons that control visibility of renderers. */
GtkWidget *vis_pixbuf;
GtkWidget *vis_text;
GtkWidget *vis_progress;
/* Entries for modifying values */
GtkWidget *e_pixbuf;
GtkWidget *e_text;
GtkWidget *e_progress;
};
/* Callback function for updating current item. */
static void
cb_clicked( GtkButton *button,
Data *data )
{
const gchar *stock_id, *string;
gint value;
gboolean pix, text, prog;
GtkTreeIter iter;
/* If nothing is selected, do nothing. */
if( ! gtk_combo_box_get_active_iter( GTK_COMBO_BOX( data->combo ), &iter ) )
return;
/* Fill variables with proper data */
stock_id = gtk_entry_get_text( GTK_ENTRY( data->e_pixbuf ) );
string = gtk_entry_get_text( GTK_ENTRY( data->e_text ) );
value = gtk_spin_button_get_value_as_int( GTK_SPIN_BUTTON( data->e_progress ) );
pix = gtk_toggle_button_get_active( GTK_TOGGLE_BUTTON( data->vis_pixbuf ) );
text = gtk_toggle_button_get_active( GTK_TOGGLE_BUTTON( data->vis_text ) );
prog = gtk_toggle_button_get_active( GTK_TOGGLE_BUTTON( data->vis_progress ) );
/* Update data store for current iter */
gtk_tree_store_set( GTK_TREE_STORE( data->store ), &iter,
TEXT_C, string,
TEXT_VIS_C, text,
PIXBUF_C, stock_id,
PIXBUF_VIS_C, pix,
PROGRESS_C, value,
PROGRESS_VIS_C, prog,
-1 );
}
/* Callback function for changed signal.
* In this function, we’ll set the widgets that control current line. */
static void
cb_changed( GtkComboBox *combo,
Data *data )
{
/* sensitive flag */
static gboolean sensitive = TRUE;
/* Vars */
GtkTreeIter iter;
gchar *stock_id = NULL, *string = NULL;
gint value;
gboolean pix, text, prog;
gboolean active;
/* Get active iter from combo box. If nothing is selected,
* disable controls. */
active = gtk_combo_box_get_active_iter( combo, &iter );
if( active )
{
gtk_tree_model_get( data->store, &iter, TEXT_C, &string,
TEXT_VIS_C, &text,
PIXBUF_C, &stock_id,
PIXBUF_VIS_C, &pix,
PROGRESS_C, &value,
PROGRESS_VIS_C, &prog,
-1 );
gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON( data->vis_pixbuf ), pix );
gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON( data->vis_text ), text );
gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON( data->vis_progress ), prog );
gtk_entry_set_text( GTK_ENTRY( data->e_pixbuf ), stock_id );
gtk_entry_set_text( GTK_ENTRY( data->e_text ), string );
gtk_spin_button_set_value( GTK_SPIN_BUTTON( data->e_progress ), value );
/* Free strings */
g_free( stock_id );
g_free( string );
}
if( sensitive != active )
{
gtk_widget_set_sensitive( data->vis_pixbuf, active );
gtk_widget_set_sensitive( data->vis_text, active );
gtk_widget_set_sensitive( data->vis_progress, active );
gtk_widget_set_sensitive( data->e_pixbuf, active );
gtk_widget_set_sensitive( data->e_text, active );
gtk_widget_set_sensitive( data->e_progress, active );
sensitive = active;
}
}
/* This function creates tree data structure and fills it with data. */
static GtkTreeModel *
create_model( Data *data )
{
GtkTreeStore *store;
GtkTreeIter parent, child;
/* Create data store. We’ll be using GtkTreeStore today, to show you how
* combo box handles tree structures. */
store = gtk_tree_store_new( N_COLS, G_TYPE_STRING, /* text */
G_TYPE_BOOLEAN, /* text visibility */
G_TYPE_STRING, /* text color */
G_TYPE_STRING, /* pixbufs */
G_TYPE_BOOLEAN, /* pixbuf visibility */
G_TYPE_INT, /* progress bar % */
G_TYPE_BOOLEAN /* progress vis */
);
/* Fill our store with some data. */
gtk_tree_store_append( store, &parent, NULL );
gtk_tree_store_set( store, &parent, TEXT_C, "Root 1",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "black",
PIXBUF_C, GTK_STOCK_OK,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &child, &parent );
gtk_tree_store_set( store, &child, TEXT_C, "Leaf 1.1",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "red",
PIXBUF_C, GTK_STOCK_ADD,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &child, &parent );
gtk_tree_store_set( store, &child, TEXT_C, "Leaf 1.2",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "green",
PIXBUF_C, GTK_STOCK_APPLY,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &child, &parent );
gtk_tree_store_set( store, &child, TEXT_C, "Leaf 1.3",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "blue",
PIXBUF_C, GTK_STOCK_CDROM,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &child, &parent );
gtk_tree_store_set( store, &child, TEXT_C, "Leaf 1.4",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "orange",
PIXBUF_C, GTK_STOCK_QUIT,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &parent, NULL );
gtk_tree_store_set( store, &parent, TEXT_C, "Root 2",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "black",
PIXBUF_C, GTK_STOCK_FILE,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &child, &parent );
gtk_tree_store_set( store, &child, TEXT_C, "Leaf 2.1",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "blue",
PIXBUF_C, GTK_STOCK_EXECUTE,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &child, &parent );
gtk_tree_store_set( store, &child, TEXT_C, "Leaf 2.2",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "red",
PIXBUF_C, GTK_STOCK_HOME,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &child, &parent );
gtk_tree_store_set( store, &child, TEXT_C, "Leaf 2.3",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "gray",
PIXBUF_C, GTK_STOCK_INFO,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
gtk_tree_store_append( store, &child, &parent );
gtk_tree_store_set( store, &child, TEXT_C, "Leaf 2.4",
TEXT_VIS_C, TRUE,
TEXT_COL_C, "green",
PIXBUF_C, GTK_STOCK_PRINT,
PIXBUF_VIS_C, TRUE,
PROGRESS_C, 100,
PROGRESS_VIS_C, TRUE,
-1 );
return( GTK_TREE_MODEL( store ) );
}
/* Main */
int
main( int argc,
char **argv )
{
GtkWidget *window;
GtkWidget *table;
GtkWidget *button;
GtkCellRenderer *cell;
Data data;
/* Initialization */
gtk_init( &argc, &argv );
/* 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 );
/* Table */
table = gtk_table_new( 4, 3, FALSE );
gtk_container_add( GTK_CONTAINER( window ), table );
/* Create combo box */
data.combo = gtk_combo_box_new();
g_signal_connect( G_OBJECT( data.combo ), "changed",
G_CALLBACK( cb_changed ), &data );
gtk_table_attach( GTK_TABLE( table ), data.combo, 0, 3, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0 );
/* Create data store */
data.store = create_model( &data );
/* Add data store to combo box */
gtk_combo_box_set_model( GTK_COMBO_BOX( data.combo ), data.store );
g_object_unref( G_OBJECT( data.store ) );
/* Create pixbuf cell renderer */
cell = gtk_cell_renderer_pixbuf_new();
/* Add cell renderer to combo box */
gtk_cell_layout_pack_start( GTK_CELL_LAYOUT( data.combo ), cell, FALSE );
/* Connect cell renderer with data from store */
gtk_cell_layout_set_attributes( GTK_CELL_LAYOUT( data.combo ), cell,
"stock-id", PIXBUF_C,
"visible", PIXBUF_VIS_C,
NULL );
/* Create text cell renderer */
cell = gtk_cell_renderer_text_new();
gtk_cell_layout_pack_start( GTK_CELL_LAYOUT( data.combo ), cell, FALSE );
gtk_cell_layout_set_attributes( GTK_CELL_LAYOUT( data.combo ), cell,
"text", TEXT_C,
"visible", TEXT_VIS_C,
"foreground", TEXT_COL_C,
NULL );
/* Create progress renderer */
cell = gtk_cell_renderer_progress_new();
gtk_cell_layout_pack_start( GTK_CELL_LAYOUT( data.combo ), cell, TRUE );
gtk_cell_layout_set_attributes( GTK_CELL_LAYOUT( data.combo ), cell,
"value", PROGRESS_C,
"visible", PROGRESS_VIS_C,
NULL );
/* Create check buttons for controling visibility */
data.vis_pixbuf = gtk_check_button_new_with_label( "Image visible" );
gtk_table_attach( GTK_TABLE( table ), data.vis_pixbuf, 0, 1, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0 );
data.vis_text = gtk_check_button_new_with_label( "Text visible" );
gtk_table_attach( GTK_TABLE( table ), data.vis_text, 1, 2, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0 );
data.vis_progress = gtk_check_button_new_with_label( "Progress visible" );
gtk_table_attach( GTK_TABLE( table ), data.vis_progress, 2, 3, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0 );
/* Create entries for modifying values */
data.e_pixbuf = gtk_entry_new();
gtk_table_attach( GTK_TABLE( table ), data.e_pixbuf, 0, 1, 2, 3,
GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0 );
data.e_text = gtk_entry_new();
gtk_table_attach( GTK_TABLE( table ), data.e_text, 1, 2, 2, 3,
GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0 );
data.e_progress = gtk_spin_button_new_with_range( 0, 100, 1 );
gtk_spin_button_set_numeric( GTK_SPIN_BUTTON( data.e_progress ), TRUE );
gtk_table_attach( GTK_TABLE( table ), data.e_progress, 2, 3, 2, 3,
GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0 );
/* Create button for applying changes */
button = gtk_button_new_from_stock( GTK_STOCK_APPLY );
g_signal_connect( G_OBJECT( button ), "clicked",
G_CALLBACK( cb_clicked ), &data );
gtk_table_attach( GTK_TABLE( table ), button, 0, 3, 3, 4,
GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0 );
/* Manually call cb_changed function to set controllers to right state. */
cb_changed( GTK_COMBO_BOX( data.combo ), &data );
/* Show everything and start main loop */
gtk_widget_show_all( window );
gtk_main();
return( 0 );
}
[/sourcecode]
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