Change the image used in a GtkButton

["Jorge Monsalvo" <jm_tecno2002 yahoo com ar>]

Hi people!,
I'm developing a small applicaction where you can assign different
buttons to actions. One thing I want to put in this application is the
user can select the color and also the shape of the button.
What I imagined was different pixmaps to set into the button. So the
first attempt was get the button from the window and reload the image,
but I can't make it work.
Can you give me a little help??
 
Thanks
 
Jorge Monsalvo
Argentina
 
PS:
    1) I'm working with GTK 2.4.10 on Win32
    2)Sorry about my english.....
 
 
This is the code for testing (modified from glade project)
 
GtkWidget*
create_pbtn_wnd (void)
{
  GtkWidget *pbtn_wnd;
  GtkWidget *hbox1;
  GtkWidget *pbtn_push;
  GtkWidget *image;
  GtkWidget *table1;
  GtkWidget *pbtn_link;
  GtkWidget *pbtn_addr;
  GtkWidget *pbtn_out;
  GtkWidget *label4;
  GtkWidget *label3;
  GtkWidget *label2;
  GtkWidget *label1;
  GtkWidget *pbtn_color;
 
  pbtn_wnd = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (pbtn_wnd), _("pbtn_wnd"));
 
  hbox1 = gtk_hbox_new (TRUE, 4);
  gtk_widget_show (hbox1);
  gtk_container_add (GTK_CONTAINER (pbtn_wnd), hbox1);
  gtk_container_set_border_width (GTK_CONTAINER (hbox1), 3);
 
  pbtn_push = gtk_button_new ();
  gtk_widget_show (pbtn_push);
  gtk_box_pack_start (GTK_BOX (hbox1), pbtn_push, FALSE, FALSE, 0);
  gtk_button_set_relief (GTK_BUTTON (pbtn_push), GTK_RELIEF_NONE);
  gtk_button_set_focus_on_click (GTK_BUTTON (pbtn_push), FALSE);
 
  image = create_pixmap (pbtn_wnd, "pbtn_black.png");
  gtk_widget_show (image);
  gtk_container_add (GTK_CONTAINER (pbtn_push), image);
 
  table1 = gtk_table_new (4, 2, FALSE);
  gtk_widget_show (table1);
  gtk_box_pack_start (GTK_BOX (hbox1), table1, FALSE, FALSE, 5);
  gtk_container_set_border_width (GTK_CONTAINER (table1), 3);
  gtk_table_set_row_spacings (GTK_TABLE (table1), 4);
  gtk_table_set_col_spacings (GTK_TABLE (table1), 2);
 
  pbtn_link = gtk_entry_new ();
  gtk_widget_show (pbtn_link);
  gtk_table_attach (GTK_TABLE (table1), pbtn_link, 1, 2, 0, 1,
                    (GtkAttachOptions) (GTK_EXPAND),
                    (GtkAttachOptions) (0), 0, 0);
 
  pbtn_addr = gtk_entry_new ();
  gtk_widget_show (pbtn_addr);
  gtk_table_attach (GTK_TABLE (table1), pbtn_addr, 1, 2, 1, 2,
                    (GtkAttachOptions) (GTK_EXPAND),
                    (GtkAttachOptions) (0), 0, 0);
 
  pbtn_out = gtk_entry_new ();
  gtk_widget_show (pbtn_out);
  gtk_table_attach (GTK_TABLE (table1), pbtn_out, 1, 2, 2, 3,
                    (GtkAttachOptions) (GTK_EXPAND),
                    (GtkAttachOptions) (0), 0, 0);
  gtk_editable_set_editable (GTK_EDITABLE (pbtn_out), FALSE);
 
  label4 = gtk_label_new (_("Color :"));
  gtk_widget_show (label4);
  gtk_table_attach (GTK_TABLE (table1), label4, 0, 1, 3, 4,
                    (GtkAttachOptions) (GTK_FILL),
                    (GtkAttachOptions) (0), 0, 0);
  gtk_misc_set_alignment (GTK_MISC (label4), 0, 0.5);
 
  label3 = gtk_label_new (_("Output :"));
  gtk_widget_show (label3);
  gtk_table_attach (GTK_TABLE (table1), label3, 0, 1, 2, 3,
                    (GtkAttachOptions) (GTK_FILL),
                    (GtkAttachOptions) (0), 0, 0);
  gtk_misc_set_alignment (GTK_MISC (label3), 0, 0.5);
 
  label2 = gtk_label_new (_("Address :"));
  gtk_widget_show (label2);
  gtk_table_attach (GTK_TABLE (table1), label2, 0, 1, 1, 2,
                    (GtkAttachOptions) (GTK_FILL),
                    (GtkAttachOptions) (0), 0, 0);
  gtk_misc_set_alignment (GTK_MISC (label2), 0, 0.5);
 
  label1 = gtk_label_new (_("Link :"));
  gtk_widget_show (label1);
  gtk_table_attach (GTK_TABLE (table1), label1, 0, 1, 0, 1,
                    (GtkAttachOptions) (GTK_FILL),
                    (GtkAttachOptions) (0), 0, 0);
  gtk_misc_set_alignment (GTK_MISC (label1), 0, 0.5);
 
  pbtn_color = gtk_combo_box_new_text ();
  gtk_widget_show (pbtn_color);
  gtk_table_attach (GTK_TABLE (table1), pbtn_color, 1, 2, 3, 4,
                    (GtkAttachOptions) (GTK_FILL),
                    (GtkAttachOptions) (GTK_FILL), 0, 0);
  gtk_combo_box_append_text (GTK_COMBO_BOX (pbtn_color),
_("PBTN_BLACK"));
  gtk_combo_box_append_text (GTK_COMBO_BOX (pbtn_color),
_("PBTN_BLUE"));
  gtk_combo_box_append_text (GTK_COMBO_BOX (pbtn_color),
_("PBTN_GREEN"));
  gtk_combo_box_append_text (GTK_COMBO_BOX (pbtn_color), _("PBTN_RED"));
  gtk_combo_box_append_text (GTK_COMBO_BOX (pbtn_color),
_("PBTN_YELLOW"));
  gtk_combo_box_append_text (GTK_COMBO_BOX (pbtn_color),
_("PBTN_E-STOP"));
  gtk_combo_box_set_active( GTK_COMBO_BOX (pbtn_color), 0);
 
  g_signal_connect ((gpointer) pbtn_push, "pressed",
                    G_CALLBACK (on_pbtn_push_pressed),
                    NULL);
  g_signal_connect ((gpointer) pbtn_push, "released",
                    G_CALLBACK (on_pbtn_push_released),
                    NULL);
  g_signal_connect ((gpointer) pbtn_color, "changed",
                    G_CALLBACK (on_pbtn_color_changed),
                    pbtn_wnd);
 
  /* Store pointers to all widgets, for use by lookup_widget(). */
  GLADE_HOOKUP_OBJECT_NO_REF (pbtn_wnd, pbtn_wnd, "pbtn_wnd");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, hbox1, "hbox1");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, pbtn_push, "pbtn_push");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, image, "image");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, table1, "table1");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, pbtn_link, "pbtn_link");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, pbtn_addr, "pbtn_addr");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, pbtn_out, "pbtn_out");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, label4, "label4");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, label3, "label3");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, label2, "label2");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, label1, "label1");
  GLADE_HOOKUP_OBJECT (pbtn_wnd, pbtn_color, "pbtn_color");
 
  return pbtn_wnd;
}
 
void
on_pbtn_color_changed                  (GtkComboBox     *combobox,
                                        gpointer         user_data)
{
  GtkWidget *image;
  GtkWidget *pbtn_push;
  GtkWidget *wnd;
  gint idx;
 
 wnd = (GtkWidget *)user_data;
    pbtn_push = lookup_widget(wnd, "pbtn_push");
 
 idx = gtk_combo_box_get_active(GTK_COMBO_BOX(combobox));
 switch(idx){
  case 0:
   image = create_pixmap (wnd, "pbtn_black.png");
   break;
  case 1:
   image = create_pixmap (wnd, "pbtn_blue.png");
   break;
  case 2:
   image = create_pixmap (wnd, "pbtn_green.png");
   break;
  case 3:
   image = create_pixmap (wnd, "pbtn_red.png");
   break;
  case 4:
   image = create_pixmap (wnd, "pbtn_yellow.png");
   break;
  case 5:
   image = create_pixmap (wnd, "pbtn_e-stop.png");
   break;
 }
 gtk_widget_show (image);
 gtk_container_add (GTK_CONTAINER (pbtn_push), image);
 gtk_widget_show (pbtn_push);
}
 
 

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