Re: Combobox focus event

[tr <tr kyborg dk>]

Hi Eric,

Thanks a lot, looks good. I will try it.

If I want the same feature with other widgets, then I can find the 
structs in the sources from GTK ?


Thomas



On 04/06/2017 10:43 PM, cecashon aol com wrote:
> Hi Thomas,
>
> You can try getting the private toggle button in the combo box. This 
> isn't a solution using the given GTK api but if you want to inspect 
> the how to get the "focus-in-event" to work with a combo box, this 
> might be helpful. You are working in C right?
>
> Eric
>
>
> /*
>     gcc -Wall combo_focus1.c -o combo_focus1 `pkg-config gtk+-3.0 
> --cflags --libs`
>     Tested on Ubuntu16.04, GTK3.18.
> */
>
> #include<gtk/gtk.h>
>
> //From gtkcombobox.c
> struct _GtkComboBoxPrivate
> {
>   GtkTreeModel *model;
>
>   GtkCellArea *area;
>
>   gint col_column;
>   gint row_column;
>
>   gint wrap_width;
>
>   gint active; /* Only temporary */
>   GtkTreeRowReference *active_row;
>
>   GtkWidget *tree_view;
>
>   GtkWidget *cell_view;
>
>   GtkWidget *box;
>   GtkWidget *button;
>   GtkWidget *arrow;
>
>   GtkWidget *popup_widget;
>   GtkWidget *popup_window;
>   GtkWidget *scrolled_window;
>
>   //GtkCssGadget *gadget;
>
>   gulong inserted_id;
>   gulong deleted_id;
>   gulong reordered_id;
>   gulong changed_id;
>   guint popup_idle_id;
>   guint activate_button;
>   guint32 activate_time;
>   guint scroll_timer;
>   guint resize_idle_id;
>
>   /* For "has-entry" specific behavior we track
>    * an automated cell renderer and text column
>    */
>   gint  text_column;
>   GtkCellRenderer *text_renderer;
>
>   gint id_column;
>
>   guint popup_in_progress : 1;
>   guint popup_shown : 1;
>   guint add_tearoffs : 1;
>   guint has_frame : 1;
>   guint is_cell_renderer : 1;
>   guint editing_canceled : 1;
>   guint auto_scroll : 1;
>   guint button_sensitivity : 2;
>   guint has_entry : 1;
>   guint popup_fixed_width : 1;
>
>   GtkTreeViewRowSeparatorFunc row_separator_func;
>   gpointer                    row_separator_data;
>   GDestroyNotify              row_separator_destroy;
>
>   GdkDevice *grab_pointer;
>
>   gchar *tearoff_title;
> };
>
> static gboolean focus_button(GtkWidget *widget, GdkEvent *event, 
> gpointer user_data);
> static gboolean focus_combo(GtkWidget *widget, GdkEvent *event, 
> 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), "Rooster Icon");
>     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 *button=gtk_button_new_with_label("Button");
>     gtk_widget_set_hexpand(button, TRUE);
>     gtk_widget_set_vexpand(button, TRUE);
>     g_signal_connect(button, "focus-in-event", 
> G_CALLBACK(focus_button), 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);
>     GtkComboBoxPrivate *priv=G_TYPE_INSTANCE_GET_PRIVATE((combo), 
> GTK_TYPE_COMBO_BOX, GtkComboBoxPrivate);
>     g_signal_connect(priv->button, "focus-in-event", 
> G_CALLBACK(focus_combo), NULL);
>
>     GtkWidget *grid=gtk_grid_new();
>     gtk_grid_attach(GTK_GRID(grid), button, 0, 0, 1, 1);
>     gtk_grid_attach(GTK_GRID(grid), combo, 0, 1, 1, 1);
>
>     gtk_container_add(GTK_CONTAINER(window), grid);
>     gtk_widget_show_all(window);
>
>     gtk_main();
>
>     return 0;
>   }
> static gboolean focus_button(GtkWidget *widget, GdkEvent *event, 
> gpointer user_data)
>   {
>     g_print("Button Focus\n");
>     return FALSE;
>   }
> static gboolean focus_combo(GtkWidget *widget, GdkEvent *event, 
> gpointer user_data)
>   {
>     g_print("Combo Focus\n");
>     return FALSE;
>   }