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package net.miginfocom.layout;
import net.miginfocom.layout.UnitValue;
import net.miginfocom.layout.ComponentWrapper;
import net.miginfocom.layout.BoundSize;
/** A class to extend if you want to provide more control over where a component is placed or the size of it.
* <p>
* Note! Returned arrays from this class will never be altered. This means that caching of arrays in these methods
* is OK.
*/
public abstract class LayoutCallback
{
/** Returns a position similar to the "pos" the component constraint.
* @param comp The component wrapper that holds the actual component (JComponent is Swing and Control in SWT).
* <b>Should not be altered.</b>
* @return The [x, y, x2, y2] as explained in the documentation for "pos". If <code>null</code>
* is returned nothing is done and this is the default.
* @see UnitValue
* @see net.miginfocom.layout.ConstraintParser#parseUnitValue(String, boolean)
*/
public UnitValue[] getPosition(ComponentWrapper comp)
{
return null;
}
/** Returns a size similar to the "width" and "height" in the component constraint.
* @param comp The component wrapper that holds the actual component (JComponent is Swing and Control in SWT).
* <b>Should not be altered.</b>
* @return The [width, height] as explained in the documentation for "width" and "height". If <code>null</code>
* is returned nothing is done and this is the default.
* @see net.miginfocom.layout.BoundSize
* @see net.miginfocom.layout.ConstraintParser#parseBoundSize(String, boolean, boolean)
*/
public BoundSize[] getSize(ComponentWrapper comp)
{
return null;
}
/** A last minute change of the bounds. The bound for the layout cycle has been set and you can correct there
* after any set of rules you like.
* @param comp The component wrapper that holds the actual component (JComponent is Swing and Control in SWT).
* <b>Should not be altered.</b>
*/
public void correctBounds(ComponentWrapper comp)
{
}
}
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