public Interface Layout

Zero indicates no max height.

Zero indicates no max width.

Invalidates this actor's layout, causing layout() to happen the next time validate() is called. This method should be called when state changes in the actor that requires a layout but does not change the minimum, preferred, maximum, or actual size of the actor (meaning it does not affect the parent actor's layout).

Invalidates this actor and its ascendants, calling invalidate() on each. This method should be called when state changes in the actor that affects the minimum, preferred, maximum, or actual size of the actor (meaning it potentially affects the parent actor's layout).

Computes and caches any information needed for drawing and, if this actor has children, positions and sizes each child, calls invalidate() on any each child whose width or height has changed, and calls validate() on each child. This method should almost never be called directly, instead validate() should be used.

Sizes this actor to its preferred width and height, then calls validate().

Generally this method should not be called in an actor's constructor because it calls layout(), which means a subclass would have layout() called before the subclass' constructor. Instead, in constructors simply set the actor's size to getPrefWidth() and getPrefHeight(). This allows the actor to have a size at construction time for more convenient use with groups that do not layout their children.

If true, this actor will be sized to the parent in validate(). If the parent is the stage, the actor will be sized to the stage. This method is for convenience only when the widget's parent does not set the size of its children (such as the stage).

Enables or disables the layout for this actor and all child actors, recursively. When false, validate() will not cause a layout to occur. This can be useful when an actor will be manipulated externally, such as with actions. Default is true.

Ensures the actor has been laid out. Calls layout() if invalidate() has been called since the last time validate() was called, or if the actor otherwise needs to be laid out. This method is usually called in Actor#draw(Batch, float) by the actor itself before drawing is performed.