Progress bar example when button is pressed

[jpercyasnet]

when I try to do progress bar update when a button is clicked, nothing is updated until the button click code is completed. Does any one have an example for using the Progress Bar?

[EPashkin]

@jpercyasnet You not tried do something like https://stackoverflow.com/a/8383141/2604116 ?

[jpercyasnet]

This is the rust code when button is clicked. addition code is added later to update the progress bar but even the first set does not update.

//----------------- list button start -----------------------------------

let directory_combobox_weak2 = directory_combobox.downgrade();
let messageval_label_weak2 = messageval_label.downgrade();
let from_entry_weak2 = from_entry.downgrade();
let to_entry_weak2 = to_entry.downgrade();
let iconsize_entry_weak2 = iconsize_entry.downgrade();
let icon_view_weak2 = icon_view.downgrade();
let progress_progressbar_weak2 = progress_progressbar.downgrade();



listgroup_button.connect_clicked(clone!(directory_combobox_weak2, messageval_label_weak2, from_entry_weak2, to_entry_weak2, iconsize_entry_weak2, progress_progressbar_weak2 => move|_| {
    let directory_combobox = upgrade_weak!(directory_combobox_weak2);
    let messageval_label = upgrade_weak!(messageval_label_weak2);
    let from_entry = upgrade_weak!(from_entry_weak2);
    let to_entry = upgrade_weak!(to_entry_weak2);
    let iconsize_entry = upgrade_weak!(iconsize_entry_weak2);
    let icon_view = upgrade_weak!(icon_view_weak2);
    let progress_progressbar = upgrade_weak!(progress_progressbar_weak2);
    progress_progressbar.set_fraction(0.5);

.
.
.
}

[jpercyasnet]

from your suggested discussion, to execute progressbar.set_fraction one has to use this code:
progress_progressbar.set_fraction(somef64variable);
while gtk::events_pending() {
gtk::main_iteration_do(true);
}
I really appreciate your assistance.

[mmstick]

GTK signals are always blocking operations. This means that if you need to do a long-running task, it should be spawned in the background. How you keep up with progress is up to you -- atomics are often a good idea alongside a gtk::idle_add() to check up with the progress over time.