void Ctrl::RefreshFrame(const Rect& r) {
	GuiLock __;
	if (manualRefresh || !IsOpen() || !IsVisible() || r.IsEmpty()) return;

private:
	bool manualRefresh;

public:
	bool IsUpdate() const { return manualRefresh; }
	void BeginUpdate() { manualRefresh = true; }
	void EndUpdate() { manualRefresh = false; RefreshFrame(); }

Ctrl::Ctrl() {
	GuiLock __;
	manualRefresh = false;

	Array<Ctrl *> ctrls;
	// Adding needed ctrls to update
	// ...
	// Begin updating of ctrls
	for (int i = 0, n = ctrls.GetCount(); i < n; ++i)
		ctrls[i]->BeginUpdate();
	// Changing data
	// ...
	// End updating of ctrls
	for (int i = 0, n = ctrls.GetCount(); i < n; ++i)
		ctrls[i]->EndUpdate();