public abstract class Layout

Layout the given parent container children

Returns the container preferred size

Some layouts can optionally track the addition of elements with meta-data that allows the user to “hint” on object positioning.

Removes the component from the layout this operation is only useful if the layout maintains references to components within it

Returns the optional component constraint

This method returns true if the Layout allows Components to Overlap.

Indicates whether some other object is “equal to” this one. The equals method implements an equivalence relation: It is reflexive: for any reference value x, x.equals(x) should return true. It is symmetric: for any reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true. It is transitive: for any reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true. It is consistent: for any reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the object is modified. For any non-null reference value x, x.equals(null) should return false. The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any reference values x and y, this method returns true if and only if x and y refer to the same object (x==y has the value true).

Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable. The general contract of hashCode is: Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables. As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)

If this method returns true, the addLayoutComponent method will be called when replacing a layout for every component within the container

Some layout managers can obscure their child components in some cases this returns true if the basic underpinnings are in place for that. This method doesn’t take padding/margin etc. into account since that is checked by the caller

If a layout specifies a different traversal order of its components than the component index, then it should override this method to return true, and it should also override #getChildrenInTraversalOrder(com.codename1.ui.Container) to set the tab indices of a container’s children.

Updates the tab traversal order