A Meta_RolloutStack is a Meta_Stack with a button that rolls/unrolls the stack contents.
If a rollout stack contains a stack, the child stack must have its Popup property set to true, otherwise the stack will not respect the RolledOut property of the rollout stack at load time.
bool - When enabled, draws itself and its children
vec3f - Position of the panel relative to its parent
SizingMode (int) - How the panel sizes itself in respect to its contents
vec2f - Size of the panel, when SizingMode==Fixed
Direction (int) - The direction to stack the child objects
HAlign (int) - How to align the objects horizontally
VAlign (int) - How to align the objects vertically
float - Specifies the gap size between objects (padding)
link - A Panel style (Meta_ColouredPanelStyle, Meta_GradientPanelStyle, Meta_TexturedPanelStyle)
string - The text to display on the rollout button
link - Link to an image (e.g. Meta_Texture) to display on the title bar
float - Scalar applied to the image to size it
link - Style to apply to the button (Meta_ColouredButtonStyle, Meta_TexturedButtonStyle)
bool - Whether the stack is initially rolled out