Re: about button's problem......

[John Cupitt ng-london org uk]

¶À¼y Kason Huang wrote:

> now i want to do:my condition is being no  mouse,the only terminal
controlling  tool is  the keyboard.(i am doing a STB project.). when a
button get focus(with keyboard) , setting  the button's  background to be a
color. then when the button lost focus,setting the button's background to be
another color.i do the following.
> i rewrite the testing code,but it's still not working like i expected.



Hi Kason, the best way to do this is to set the name of the widget and
then use .gtkrc to set a colour.

here's a program that does what you want:

----------------------
#include <gtk/gtk.h>

void
set_name (GtkWidget * widget, const char *name)
{
  gtk_widget_set_name (widget, name);
  if (GTK_IS_CONTAINER (widget))
    gtk_container_foreach (GTK_CONTAINER (widget),
			   (GtkCallback) set_name, (char *) name);
}


static gboolean
set_name_cb (GtkWidget * widget, GdkEvent * event, gpointer client)
{
  set_name (widget, (const char *) client);

  return TRUE;
}

int
main (int argc, char *argv[])
{
  GtkWidget *window;
  GtkWidget *vbox;
  GtkWidget *button;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

  vbox = gtk_vbox_new (FALSE, 0);
  gtk_container_add (GTK_CONTAINER (window), vbox);

  button = gtk_button_new_with_label ("foo");
  gtk_box_pack_start (GTK_BOX (vbox), button, TRUE, TRUE, 0);
  gtk_signal_connect (GTK_OBJECT (button), "focus_in_event",
		      GTK_SIGNAL_FUNC (set_name_cb), "focussed_widget");
  gtk_signal_connect (GTK_OBJECT (button), "focus_out_event",
		      GTK_SIGNAL_FUNC (set_name_cb), "default");

  button = gtk_button_new_with_label ("bar");
  gtk_box_pack_start (GTK_BOX (vbox), button, TRUE, TRUE, 0);
  gtk_signal_connect (GTK_OBJECT (button), "focus_in_event",
		      GTK_SIGNAL_FUNC (set_name_cb), "focussed_widget");
  gtk_signal_connect (GTK_OBJECT (button), "focus_out_event",
		      GTK_SIGNAL_FUNC (set_name_cb), "default");

  gtk_widget_show_all (window);

  gtk_main ();

  return 0;
}
-------------------------

You need to make a file called .gtkrc in your home directory, and add
this to the end:

-------------------------
style "focussed_style" = "default"
{
        bg[NORMAL] = { 0.1, 0.7, 0.6 }
        bg[PRELIGHT] = { 0.2, 0.8, 0.7 }
        bg[ACTIVE] = { 0.1, 0.7, 0.6 }
        bg[SELECTED] = { 0.1, 0.7, 0.6 }
        bg[INSENSITIVE] = { 0, 0.4, 0.3 }
}

widget "*focussed_widget" style "focussed_style"
--------------------------

John



========================================================== 
Coming soon: 
Aelbert Cuyp 13 February - 12 May 2002 

For information and tickets: 
http://www.nationalgallery.org.uk