Re: Combobox focus event

[cecashon aol com]

Hi Nicola,

The "set-focus-child" on the container fires for the "focus-in-event" and "focus-out-event". I forgot about 
those container functions though. You can get the toggle button pointer from the container and set up your 
"focus-in-event". That way there is no ugly business of using a private structure.

Eric


/*
    gcc -Wall combo_focus2.c -o combo_focus2 `pkg-config gtk+-3.0 --cflags --libs`
    Tested on Ubuntu16.04, GTK3.18.

    https://bugzilla.gnome.org/show_bug.cgi?id=599076
    Bugzilla Bug 599076 - GtkComboBox missing focus events 
*/

#include<gtk/gtk.h>

static void find_toggle_button(GtkWidget *widget, GtkWidget **toggle_button);
static gboolean focus_button1(GtkWidget *widget, GdkEvent *event, gpointer user_data);
static gboolean focus_combo(GtkWidget *widget, GdkEvent *event, gpointer user_data);
static gboolean focus_button2(GtkWidget *widget, GdkEvent *event, gpointer user_data);
static void focus_combo_container(GtkContainer *container, GtkWidget *widget, gpointer user_data);

int main(int argc, char *argv[])
  {
    gtk_init(&argc, &argv);

    GtkWidget *window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Combo Focus");
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_container_set_border_width(GTK_CONTAINER(window), 10);
    gtk_window_set_default_size(GTK_WINDOW(window), 200, 100);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    GtkWidget *button1=gtk_button_new_with_label("Button1");
    gtk_widget_set_hexpand(button1, TRUE);
    gtk_widget_set_vexpand(button1, TRUE);
    g_signal_connect(button1, "focus-in-event", G_CALLBACK(focus_button1), NULL);  

    GtkWidget *combo=gtk_combo_box_text_new();
    gtk_combo_box_text_insert(GTK_COMBO_BOX_TEXT(combo), 0, "1", "Turtle");
    gtk_combo_box_text_insert(GTK_COMBO_BOX_TEXT(combo), 1, "2", "Koala");
    gtk_combo_box_text_insert(GTK_COMBO_BOX_TEXT(combo), 2, "3", "Cheetah");
    gtk_combo_box_set_active(GTK_COMBO_BOX(combo), 0);
    gtk_widget_set_hexpand(combo, TRUE);
    GtkWidget *toggle_button=NULL;
    gtk_container_forall(GTK_CONTAINER(combo), (GtkCallback)find_toggle_button, &toggle_button);
    g_signal_connect(toggle_button, "focus-in-event", G_CALLBACK(focus_combo), NULL); 

    g_signal_connect(combo, "set-focus-child", G_CALLBACK(focus_combo_container), NULL);

    GtkWidget *button2=gtk_button_new_with_label("Button2");
    gtk_widget_set_hexpand(button2, TRUE);
    gtk_widget_set_vexpand(button2, TRUE);
    g_signal_connect(button2, "focus-in-event", G_CALLBACK(focus_button2), NULL);   
           
    GtkWidget *grid=gtk_grid_new();
    gtk_grid_attach(GTK_GRID(grid), button1, 0, 0, 1, 1);
    gtk_grid_attach(GTK_GRID(grid), combo, 0, 1, 1, 1);
    gtk_grid_attach(GTK_GRID(grid), button2, 0, 2, 1, 1);
  
    gtk_container_add(GTK_CONTAINER(window), grid);
    gtk_widget_show_all(window);

    gtk_main();

    return 0;
  }
static void find_toggle_button(GtkWidget *widget, GtkWidget **toggle_button)
  {
    if(g_strcmp0(gtk_widget_get_name(widget), "GtkToggleButton")==0)
      {
        g_print("Found Toggle Button in Combo\n");
        *toggle_button=widget;
      }
  }
static gboolean focus_button1(GtkWidget *widget, GdkEvent *event, gpointer user_data)
  {
    g_print("Button1 Focus\n");
    return FALSE;
  }
static gboolean focus_combo(GtkWidget *widget, GdkEvent *event, gpointer user_data)
  {
    g_print("Combo Focus In\n");
    return FALSE;
  }
static gboolean focus_button2(GtkWidget *widget, GdkEvent *event, gpointer user_data)
  {
    g_print("Button2 Focus\n");
    return FALSE;
  }
static void focus_combo_container(GtkContainer *container, GtkWidget *widget, gpointer user_data)
  {
    g_print("Combo Container Focus\n");
  }