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LibCore+LibGUI: Don't fire timers in non-visible windows by default

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LibCore timers now have a TimerShouldFireWhenNotVisible flag which is
set to "No" by default.

If "No", the timer will not be fired by the event loop if it's within
a CObject tree whose nearest GWindow ancestor is currently not visible
for timer purposes. (Specificially, this means that the window is
either minimized or fully occluded, and so does not want to fire timers
just to update the UI.)

This is another nice step towards a calm and serene operating system.
This commit is contained in:
Andreas Kling 2019-12-29 15:58:07 +01:00
parent f8f2b8b520
commit 411d293961
6 changed files with 42 additions and 9 deletions
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3
Libraries/LibGUI/GWindow.h
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@ -139,6 +139,8 @@ public:
static void update_all_windows(Badge<GWindowServerConnection>);
void notify_state_changed(Badge<GWindowServerConnection>, bool minimized, bool occluded);
virtual bool is_visible_for_timer_purposes() const override { return m_visible_for_timer_purposes; }
protected:
GWindow(CObject* parent = nullptr);
virtual void wm_event(GWMEvent&);
@ -176,4 +178,5 @@ private:
bool m_fullscreen { false };
bool m_show_titlebar { true };
bool m_layout_pending { false };
bool m_visible_for_timer_purposes { true };
};