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/* Copyright 2016 Software Freedom Conservancy Inc.
* Copyright 2017 Jens Georg <mail@jensge.org>
*
* This software is licensed under the GNU LGPL (version 2.1 or later).
* See the COPYING file in this distribution.
*/
public class ProgressDialog : Gtk.Window {
private Gtk.ProgressBar progress_bar = new Gtk.ProgressBar();
private Gtk.Button cancel_button = null;
private Cancellable cancellable;
private uint64 last_count = uint64.MAX;
private int update_every = 1;
private int minimum_on_screen_time_msec = 500;
private ulong time_started;
#if UNITY_SUPPORT
UnityProgressBar uniprobar = UnityProgressBar.get_instance();
#endif
public ProgressDialog(Gtk.Window? owner, string text, Cancellable? cancellable = null) {
this.cancellable = cancellable;
set_title(text);
set_resizable(false);
if (owner != null)
set_transient_for(owner);
set_modal(true);
set_type_hint(Gdk.WindowTypeHint.DIALOG);
progress_bar.set_size_request(300, -1);
progress_bar.set_show_text(true);
Gtk.Box vbox_bar = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);
vbox_bar.pack_start(progress_bar, true, false, 0);
if (cancellable != null) {
cancel_button = new Gtk.Button.with_mnemonic(Resources.CANCEL_LABEL);
cancel_button.clicked.connect(on_cancel);
delete_event.connect(on_window_closed);
}
Gtk.Box hbox = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 8);
hbox.pack_start(vbox_bar, true, false, 0);
if (cancel_button != null)
hbox.pack_end(cancel_button, false, false, 0);
Gtk.Label primary_text_label = new Gtk.Label("");
primary_text_label.set_markup("<span weight=\"bold\">%s</span>".printf(text));
primary_text_label.xalign = 0.0f;
primary_text_label.yalign = 0.5f;
Gtk.Box vbox = new Gtk.Box(Gtk.Orientation.VERTICAL, 12);
vbox.pack_start(primary_text_label, false, false, 0);
vbox.pack_start(hbox, true, false, 0);
vbox.halign = Gtk.Align.CENTER;
vbox.valign = Gtk.Align.CENTER;
vbox.hexpand = true;
vbox.vexpand = true;
vbox.margin_start = 12;
vbox.margin_end = 12;
vbox.margin_top = 12;
vbox.margin_bottom = 12;
add(vbox);
time_started = now_ms();
}
public override void realize() {
base.realize();
// if unable to cancel the progress bar, remove the close button
if (cancellable == null)
get_window().set_functions(Gdk.WMFunction.MOVE);
}
public void update_display_every(int update_every) {
assert(update_every >= 1);
this.update_every = update_every;
}
public void set_minimum_on_screen_time_msec(int minimum_on_screen_time_msec) {
this.minimum_on_screen_time_msec = minimum_on_screen_time_msec;
}
public void set_fraction(int current, int total) {
set_percentage((double) current / (double) total);
}
public void set_percentage(double pct) {
pct = pct.clamp(0.0, 1.0);
maybe_show_all(pct);
progress_bar.set_fraction(pct);
progress_bar.set_text(_("%d%%").printf((int) (pct * 100.0)));
#if UNITY_SUPPORT
//UnityProgressBar: set progress
uniprobar.set_progress(pct);
#endif
}
public void set_status(string text) {
progress_bar.set_text(text);
#if UNITY_SUPPORT
//UnityProgressBar: try to draw progress bar
uniprobar.set_visible(true);
#endif
show_all();
}
// This can be used as a ProgressMonitor delegate.
public bool monitor(uint64 count, uint64 total, bool do_event_loop = true) {
if ((last_count == uint64.MAX) || (count - last_count) >= update_every) {
set_percentage((double) count / (double) total);
last_count = count;
}
bool keep_going = (cancellable != null) ? !cancellable.is_cancelled() : true;
// TODO: get rid of this. non-trivial, as some progress-monitor operations are blocking
// and need to allow the event loop to spin
//
// Important: Since it's possible the progress dialog might be destroyed inside this call,
// avoid referring to "this" afterwards at all costs (in case all refs have been dropped)
if (do_event_loop)
spin_event_loop();
return keep_going;
}
public new void close() {
#if UNITY_SUPPORT
//UnityProgressBar: reset
uniprobar.reset();
#endif
hide();
destroy();
}
private bool on_window_closed() {
on_cancel();
return false; // return false so that the system handler will remove the window from
// the screen
}
private void on_cancel() {
if (cancellable != null)
cancellable.cancel();
cancel_button.sensitive = false;
}
private void maybe_show_all(double pct) {
// Appear only after a while because some jobs may take only a
// fraction of second to complete so there's no point in showing progress.
if (!this.visible && now_ms() - time_started > minimum_on_screen_time_msec) {
// calculate percents completed in one ms
double pps = pct * 100.0 / minimum_on_screen_time_msec;
// calculate [very rough] estimate of time to complete in ms
double ttc = 100.0 / pps;
// If there is still more work to do for at least MINIMUM_ON_SCREEN_TIME_MSEC,
// finally display the dialog.
if (ttc > minimum_on_screen_time_msec) {
#if UNITY_SUPPORT
//UnityProgressBar: try to draw progress bar
uniprobar.set_visible(true);
#endif
show_all();
spin_event_loop();
}
}
}
}
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