mirror of
https://gitlab.gnome.org/GNOME/gitg
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109 lines
1.6 KiB
Vala
109 lines
1.6 KiB
Vala
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namespace GitgGtk
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{
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public class WhenMapped
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{
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public delegate void OnMapped();
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private unowned Gtk.Widget? d_widget;
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private unowned Object? d_lifetime;
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private ulong d_sid;
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public WhenMapped(Gtk.Widget widget)
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{
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d_sid = 0;
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d_widget = widget;
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d_widget.weak_ref(weak_notify);
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}
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private void weak_notify(Object o)
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{
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d_widget = null;
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if (d_lifetime != null)
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{
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d_lifetime.weak_unref(lifetime_weak_notify);
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d_lifetime = null;
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}
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}
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~WhenMapped()
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{
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if (d_widget != null)
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{
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if (d_sid != 0)
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{
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d_widget.disconnect(d_sid);
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}
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d_widget.weak_unref(weak_notify);
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d_widget = null;
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}
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if (d_lifetime != null)
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{
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d_lifetime.weak_unref(lifetime_weak_notify);
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d_lifetime = null;
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}
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}
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private void lifetime_weak_notify(Object o)
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{
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if (d_sid != 0 && d_widget != null)
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{
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d_widget.disconnect(d_sid);
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d_sid = 0;
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}
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d_lifetime = null;
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}
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public void update(owned OnMapped mapped, Object? lifetime = null)
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{
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if (d_widget == null)
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{
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return;
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}
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if (d_sid != 0)
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{
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d_widget.disconnect(d_sid);
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}
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if (d_lifetime != null)
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{
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d_lifetime.weak_unref(lifetime_weak_notify);
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d_lifetime = null;
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}
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if (d_widget.get_mapped())
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{
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mapped();
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}
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else
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{
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d_sid = d_widget.map.connect(() => {
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d_sid = 0;
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if (d_lifetime != null)
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{
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d_lifetime.weak_unref(lifetime_weak_notify);
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d_lifetime = null;
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}
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mapped();
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});
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d_lifetime = lifetime;
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if (d_lifetime != null)
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{
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d_lifetime.weak_ref(lifetime_weak_notify);
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}
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}
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}
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}
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}
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// ex: ts=4 noet
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