gtkmm - How to fill Gtk::TreeModelColumn with a large dataset without locking up the application -

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i need fill in large (maybe not - several thousands of entries) dataset gtk::treemodelcolumn. how do without locking application. safe put processing separate thread? parts of application have protect lock then? gtk::treemodelcolumn class, or gtk::treeview widget placed in, or maybe surrounding frame or window?

there 2 general approaches take. (disclaimer: i've tried provide example code, use gtkmm - i'm more familiar gtk in c. principles remain same, however.)

one use idle function - runs whenever nothing's happening in gui. best results, small amount of calculation in idle function, adding 1 item treeview. if return true idle function, called again whenever there more processing time available. if return false, not called again. part idle functions don't have lock anything. can define idle function this:

bool fill_column(gtk::treemodelcolumn* column) {     // add item column     return !column_is_full(); }

then start process this:

glib::signal_idle().connect(sigc::bind(&fill_column, column));

the other approach use threads. in c api, involve gdk_threads_enter() , friends, gather proper way in gtkmm, use glib::dispatcher. haven't used before, here example of it. however, can still use c api gtkmm, pointed out here.


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