org.jurvis.awt
Class JvAbstractLayoutManager2

java.lang.Object
  org.jurvis.awt.JvAbstractLayoutManager
      org.jurvis.awt.JvAbstractLayoutManager2

All Implemented Interfaces:

LayoutManager, LayoutManager2

Direct Known Subclasses:

JvColumnLayout

public abstract class JvAbstractLayoutManager2
extends JvAbstractLayoutManager
implements LayoutManager2

This class provides a skeletal implementation of the LayoutManager2 interface, to minimize the effort required to implement this interface.

Author:

Neil W. Weber

Field Summary

protected HashMap

constraintsMap The constraints for each component.

Fields inherited from class org.jurvis.awt.JvAbstractLayoutManager

gap

Constructor Summary

JvAbstractLayoutManager2()
Construct a new JvAbstractLayoutManager2.

Method Summary

void	addLayoutComponent(Component comp, Object constraints) Adds the specified component to the layout, using the specified constraint object.
float	getLayoutAlignmentX(Container target) Returns the alignment along the x axis.
float	getLayoutAlignmentY(Container target) Returns the alignment along the y axis.
void	invalidateLayout(Container target) Invalidates the layout, indicating that if the layout manager has cached information it should be discarded.
Dimension	maximumLayoutSize(Container target) Returns the maximum size of this component.
void	removeLayoutComponent(Component comp) Removes the specified component from the layout.
void	setConstraints(Component comp, Object constraints) Sets the constraints for the specified component in this layout.

Methods inherited from class org.jurvis.awt.JvAbstractLayoutManager

addLayoutComponent, minimumLayoutSize, preferredLayoutSize

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.awt.LayoutManager

addLayoutComponent, layoutContainer, minimumLayoutSize, preferredLayoutSize

Field Detail

constraintsMap

protected HashMap constraintsMap

The constraints for each component. Keyed by the component itself.

Constructor Detail

JvAbstractLayoutManager2

public JvAbstractLayoutManager2()

Construct a new JvAbstractLayoutManager2.

Method Detail

addLayoutComponent

public void addLayoutComponent(Component comp,
                               Object constraints)

Adds the specified component to the layout, using the specified constraint object.

Specified by:

addLayoutComponent in interface LayoutManager2

Parameters:

comp - the component to be added

constraints - where/how the component is added to the layout.

removeLayoutComponent

public void removeLayoutComponent(Component comp)

Removes the specified component from the layout.

Specified by:

removeLayoutComponent in interface LayoutManager

Parameters:

comp - the component to be removed

setConstraints

public void setConstraints(Component comp,
                           Object constraints)

Sets the constraints for the specified component in this layout.

Parameters:

comp - the component to be modified

constraints - the constraints to be applied

maximumLayoutSize

public Dimension maximumLayoutSize(Container target)

Returns the maximum size of this component.

Specified by:

maximumLayoutSize in interface LayoutManager2

Returns:

Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE)

getLayoutAlignmentX

public float getLayoutAlignmentX(Container target)

Returns the alignment along the x axis. This specifies how the component would like to be aligned relative to other components. The value should be a number between 0 and 1 where 0 represents alignment along the origin, 1 is aligned the furthest away from the origin, 0.5 is centered, etc.

Specified by:

getLayoutAlignmentX in interface LayoutManager2

Returns:

0.5

getLayoutAlignmentY

public float getLayoutAlignmentY(Container target)

Returns the alignment along the y axis. This specifies how the component would like to be aligned relative to other components. The value should be a number between 0 and 1 where 0 represents alignment along the origin, 1 is aligned the furthest away from the origin, 0.5 is centered, etc.

Specified by:

getLayoutAlignmentY in interface LayoutManager2

Returns:

0.5

invalidateLayout

public void invalidateLayout(Container target)

Invalidates the layout, indicating that if the layout manager has cached information it should be discarded.

Specified by:

invalidateLayout in interface LayoutManager2