How to change Tab by Enter?

laremi400 · **Posted:** Mon Apr 06, 2009 3:07 pm

When i press Enter i want change the focus to the next GtkEntry. Is possible?

I was learn about gtk_widget_grab_focus to change the focus to the next entry, but i d'ont know which is.
I was read about the key_press_event but i can't see how make it.

Thank you...

tadeboro · **Posted:** Mon Apr 06, 2009 6:20 pm

Hi.

Since learning by examining code is the way to go, I wrote a simple application for you to dissect. It implements the behavior you desire - move to the next entry field when you press Return.

Code:

#include <gtk/gtk.h>

#define NO_ENTRIES 10

typedef struct _Data Data;
struct _Data
{
   GtkWidget *entries[NO_ENTRIES];
};

static void
cb_activate( GtkEntry *entry,
          Data     *data )
{
   gint index =
      GPOINTER_TO_INT( g_object_get_data( G_OBJECT( entry ), "idx" ) ) + 1;

   if( index < NO_ENTRIES )
      gtk_widget_grab_focus( data->entries[index] );
}

int
main( int    argc,
     char **argv )
{
   GtkWidget *window;
   GtkWidget *vbox;
   GtkWidget *entry;

   Data data;
   gint i;

   gtk_init( &argc, &argv );

   window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
   g_signal_connect( G_OBJECT( window ), "destroy",
                 G_CALLBACK( gtk_main_quit ), NULL );

   vbox = gtk_vbox_new( TRUE, 6 );
   gtk_container_add( GTK_CONTAINER( window ), vbox );

   for( i = 0; i < NO_ENTRIES; i++ )
   {
      entry = gtk_entry_new();
      data.entries[i] = entry;
      g_object_set_data( G_OBJECT( entry ), "idx", GINT_TO_POINTER( i ) );
      g_signal_connect( G_OBJECT( entry ), "activate",
                    G_CALLBACK( cb_activate ), &data );
      gtk_box_pack_start( GTK_BOX( vbox ), entry, FALSE, FALSE, 0 );
   }

   gtk_widget_show_all( window );

   gtk_main();

   return( 0 );
}

laremi400 · **Posted:** Tue Apr 07, 2009 7:41 am

Thank you very much tadeboro.

Hummmmmmm... post number 666... That's means anything?... :wink:

laremi400 · **Posted:** Tue Apr 07, 2009 8:39 am

Solved:

gtk_widget_child_focus(widget,GTK_DIR_TAB_FORWARD);

Code:

#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h> ///usr/include/gtk-2.0/gdk/gdkkeysyms.h
#include <glib/gprintf.h>

static gboolean 
key_control(GtkWidget *widget,GdkEventKey  *event,gpointer data)
{
switch(event->keyval)
      {
      case GDK_F1: g_printf("\n F1 \n"); break;
      case GDK_Scroll_Lock: g_printf("\n SCROLL \n"); break;
      case GDK_Caps_Lock: {
      if(event->state & (GDK_LOCK_MASK)) g_printf("\n Scroll Lock OFF\n");
      else g_printf("\n Scroll Lock ON\n");} break;
      case GDK_Num_Lock: {
      if(event->state & (GDK_MOD2_MASK))g_printf("\n Num Lock OFF\n");
      else g_printf("\n Num Lock ON\n");} break;
      case GDK_Return: {
      gtk_widget_child_focus(widget,GTK_DIR_TAB_FORWARD);} break;
       }
return FALSE; 
}


int
main( int    argc,
      char **argv )
{
    GtkWidget *window;
    GtkWidget *vbox;
    GtkWidget *entry;

    gint i;

    gtk_init( &argc, &argv );

    window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
    g_signal_connect( G_OBJECT( window ), "destroy",
                      G_CALLBACK( gtk_main_quit ), NULL );

    vbox = gtk_vbox_new( TRUE, 6 );
    gtk_container_add( GTK_CONTAINER( window ), vbox );

    for( i = 0; i < 10; i++ )
    {
        entry = gtk_entry_new();
        gtk_box_pack_start( GTK_BOX( vbox ), entry, FALSE, FALSE, 0 );
    }

    g_signal_connect(G_OBJECT(window),"key_press_event",G_CALLBACK(key_control),NULL);

    gtk_widget_show_all( window );

    gtk_main();

    return( 0 );
}

laremi400 · **Posted:** Tue Apr 14, 2009 2:34 pm

another way:

Code:

void  LookForWidget(GtkContainer *box,gchar *name,gchar *data,gint way)
{
GList *list = NULL; 
GtkWidget *children  = NULL;

list = gtk_container_get_children(box);

while(list != NULL)
     {
     if(GTK_IS_CONTAINER(GTK_WIDGET(list->data)))
       {
       LookForWidget(GTK_CONTAINER(GTK_WIDGET(list->data)),name,data,way);
       }  
    else {
         if(strcmp(gtk_widget_get_name(GTK_WIDGET(list->data)),name) == 0)
           {
           children = GTK_WIDGET(list->data);
           switch(way)
                {
                case 1: {
                        if(GTK_IS_ENTRY(children)) gtk_entry_set_text(GTK_ENTRY(children),data);
                        } break;
                case 2: {
                        if(GTK_IS_ENTRY(children)) strcpy(data,gtk_entry_get_text(GTK_ENTRY(children)));
                        } break;
                case 3: gtk_widget_grab_focus(children); break;
                }
            
           }
         }
     list = list->next;
     }
g_list_free(list);
}

laremi400 · **Posted:** Wed Apr 15, 2009 12:28 pm

if you use gtk_widget_child_focus in key-press-event, the event doing before the press.
In this way the event is when you validate the entry.

Code:

#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h> ///usr/include/gtk-2.0/gdk/gdkkeysyms.h
#include <glib/gprintf.h>


typedef struct {
GtkWidget *base; //GtkWindow (main)
int other; //example
} for_entry;



static gboolean 
Control_Activate(GtkEntry *entry,gpointer data)
{
for_entry *ent = (for_entry *) data;

printf("\n %s\n",gtk_widget_get_name(GTK_WIDGET(entry)));

gtk_widget_child_focus(ent->base,GTK_DIR_TAB_FORWARD);

return FALSE;  
}


int
main( int    argc,
      char **argv )
{
    GtkWidget *window;
    GtkWidget *vbox;
    GtkWidget *entry;
    for_entry *ent = g_slice_new(for_entry);

    //Data data;
    gint i;

    gtk_init( &argc, &argv );

    window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
    g_signal_connect( G_OBJECT( window ), "destroy",
                      G_CALLBACK( gtk_main_quit ), NULL );

    vbox = gtk_vbox_new( TRUE, 6 );
    gtk_container_add( GTK_CONTAINER( window ), vbox );

    for( i = 0; i < 10; i++ )
    {
        entry = gtk_entry_new();
        //data.entries[i] = entry;
        gtk_box_pack_start( GTK_BOX( vbox ), entry, FALSE, FALSE, 0 );
        ent->base = window;
        ent->other = 0;
        g_signal_connect(entry,"activate",G_CALLBACK(Control_Activate),ent);
    }


    gtk_widget_show_all( window );

    gtk_main();

    return( 0 );
}

laremi400 · **Posted:** Wed Apr 15, 2009 1:50 pm

Oooooooops:

Code:

 gtk_widget_show_all( window );

    gtk_main();

    g_slice_free(for_entry,ent);

    return( 0 );

g_slice_free(for_entry,ent);

GTK+ Forums

How to change Tab by Enter?

Who is online