ParentCtrl pane;
pane.SetLayout(Ctrl.LAYOUT_TOPDOWN);

ParentCtrl topSubPane;
ParentCtrl bottomSubPane;

topSubPane.Add(mickeyMouseDrawing);
bottomSubPane.Add(button1).Add(button2).Add(button3);

template<class T>
class BoxLayout : public T
{
public:
    BoxLayout() {ishorz = false; border = 4; spacing = 4;}
    
    virtual void Layout();
    
    BoxLayout<T> &SetHorz(bool _ishorz = true)   {ishorz = _ishorz; return *this;}
    bool GetHorz() const                         {return ishorz;}
    
    BoxLayout<T> &SetBorder(int _border = 4)     {ASSERT(_border>=0); border = _border; return *this;}
    int  GetBorder() const                       {return border;}
    
    BoxLayout<T> &SetSpacing(int _spacing = 4)   {ASSERT(_spacing>=0); spacing = _spacing; return *this;}
    int  GetSpacing() const                      {return border;}
protected:
    int spacing;
    int border;
    bool ishorz;
};

template<class T>
void BoxLayout<T>::Layout()
{
    Size sz = T::GetSize();
    Ctrl::LogPos cp;
    int children = 0, total_space;
    Ctrl *c = T::GetFirstChild();   
    
    while (c) {
        children++;
        c = c->GetNext();   
    }
    if (!children) return;
    
    total_space = border*2+(children-1)*spacing;
    if (ishorz) {
        if (total_space > sz.cx) return;
        cp.x = Ctrl::Logc(LEFT, border, (sz.cx-total_space)/children);
        cp.y = Ctrl::Logc(SIZE, border, border);
    }
    else {
        if (total_space > sz.cy) return;
        cp.x = Ctrl::Logc(SIZE, border, border);
        cp.y = Ctrl::Logc(TOP, border, (sz.cy-total_space)/children);
    }
        
    c = T::GetFirstChild();
    while (c) {
        c->SetPos(cp);
        if (ishorz)
            cp.x.SetA(cp.x.GetA()+cp.x.GetB()+spacing); 
        else
            cp.y.SetA(cp.y.GetA()+cp.y.GetB()+spacing); 
        c = c->GetNext();   
    }   
}

typedef BoxLayout<LabelBox> LabelBoxPane;
typedef BoxLayout<StaticRect> StaticBoxPane;

class AWindow : public TopWindow {
public:

	typedef AWindow CLASSNAME;
	LabelBoxPane top_pane;
	StaticBoxPane sub_pane;
	Button btn[5];

	AWindow()
	{
		SetRect(Size(400, 400));
		CenterScreen();
		Title("Layout Test");
		Sizeable();
		
		// Config buttons and add to top pane
		for (int i = 0; i < 3; i++) {
			btn[i].SetLabel("Button " + AsString(i));
			btn[i] <<= THISBACK(OnButton1);	
			top_pane.Add(btn[i]);
		}
		// Config other buttons and add to sub pane
		for (int i = 3; i < 5; i++) {
			btn[i].SetLabel("Button " + AsString(i));
			btn[i] <<= THISBACK(OnButton2);	
			sub_pane.Add(btn[i]);
		}		
		// Config sub pane
		sub_pane.SetHorz(true).SetBorder(0);
		
		// Config top pane and add sub pane (LabelBox ignores mouse by default)
		top_pane.SetLabel("LabelBox with BoxLayout").IgnoreMouse(false);
		top_pane.SetBorder(12).Add(sub_pane);
		
		// Add top pane
		Add(top_pane.VSizePosZ(10, 10).HSizePosZ(10, 10));
	}
	
	void OnButton1() {
		// Flips orientation of top pane
		top_pane.SetHorz(!top_pane.GetHorz());
		top_pane.Layout();
	}
	
	void OnButton2() {
		// Flips orientation of sub pane
		sub_pane.SetHorz(!sub_pane.GetHorz());
		sub_pane.Layout();
	}	
};

ctrl LabelBoxPane {
	group "Layout";

	>LabelBox;
	bool SetHorz = true;
	int SetBorder = 4;
	int SetSpacing = 4;
};

ctrl StaticBoxPane {
	group "Layout";

	>Base;
	bool SetHorz = true;
	int SetBorder = 4;
	int SetSpacing = 4;
};