I am writing my first gtkmm application (actually my first GUI
application). To get familiar with the toolkit (both gtk and gtkmm), I
studied the code of some existing applications. And in one of those
applications I found a construct that I would like to use in my own
application, but I don't know how to port the gtk code to gtkmm.
The main application contains a treeview and a secondary dialog is used
to edit the treeview entries. But if you try to edit an entry that is
already "open", the existing dialog is activated instead of creating a
new one (see code snippet below). How can I do this in C++?
And how do I automatically destroy the dialog after clicking the (close)
button?
/* myobject_treeview.c */
GtkWidget* main_window = ...;
myobject* obj = ...;
GtkWidget* dialog = myobject_dialog_new (main_window, obj);
gtk_widget_show (dialog);
/* myobject_dialog.c */
static GHashTable *dialogs = NULL;
GtkWidget* myobject_dialog_new (GtkWidget* parent, myobject* obj)
{
if (!dialogs) {
dialogs = g_hash_table_new (NULL, NULL);
}
dialog = g_hash_table_lookup (dialogs, obj);
if (dialog) {
gtk_window_present (GTK_WINDOW (dialog));
return dialog;
}
dialog = gtk_dialog_new ();
g_hash_table_insert (dialogs, obj, dialog);
g_signal_connect (close_button,
"clicked",
G_CALLBACK (myobject_dialog_close_clicked_cb),
dialog);
g_signal_connect (dialog,
"destroy",
G_CALLBACK (myobject_dialog_destroy_cb),
obj);
g_signal_connect_object (parent,
"destroy",
G_CALLBACK (myobject_dialog_parent_destroy_cb),
dialog,
0);
}
static void
myobject_dialog_destroy_cb (GtkWidget *parent, myobject *obj)
{
g_hash_table_remove (dialogs, obj);
}
static void
myobject_dialog_parent_destroy_cb (GtkWidget *parent, GtkWidget *dialog)
{
gtk_widget_destroy (dialog);
}
static void
myobject_dialog_close_clicked_cb (GtkWidget *button, GtkWidget *dialog)
{
gtk_widget_destroy (dialog);
}
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