Module java.desktop

Package javax.swing

Class ViewportLayout

java.lang.Object

javax.swing.ViewportLayout

All Implemented Interfaces:

LayoutManager, Serializable

public class ViewportLayout
extends Object
implements LayoutManager, Serializable

The default layout manager for JViewport. ViewportLayout defines a policy for layout that should be useful for most applications. The viewport makes its view the same size as the viewport, however it will not make the view smaller than its minimum size. As the viewport grows the view is kept bottom justified until the entire view is visible, subsequently the view is kept top justified.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans has been added to the java.beans package. Please see XMLEncoder.

Since:

1.2

Constructor Summary

Constructors

Constructor	Description
ViewportLayout()	Constructs a ViewportLayout.

Method Summary

Modifier and Type	Method	Description
void	addLayoutComponent(String name, Component c)	Adds the specified component to the layout.
void	layoutContainer(Container parent)	Called by the AWT when the specified container needs to be laid out.
Dimension	minimumLayoutSize(Container parent)	Returns the minimum dimensions needed to layout the components contained in the specified target container.
Dimension	preferredLayoutSize(Container parent)	Returns the preferred dimensions for this layout given the components in the specified target container.
void	removeLayoutComponent(Component c)	Removes the specified component from the layout.

Methods declared in class java.lang.Object

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

Constructor Details

ViewportLayout

public ViewportLayout()

Constructs a ViewportLayout.

Method Details

addLayoutComponent

public void addLayoutComponent(String name,
 Component c)

Adds the specified component to the layout. Not used by this class.

Specified by:

addLayoutComponent in interface LayoutManager

Parameters:

name - the name of the component

c - the component to be added

removeLayoutComponent

public void removeLayoutComponent(Component c)

Removes the specified component from the layout. Not used by this class.

Specified by:

removeLayoutComponent in interface LayoutManager

Parameters:

c - the component to remove

preferredLayoutSize

public Dimension preferredLayoutSize(Container parent)

Returns the preferred dimensions for this layout given the components in the specified target container.

Specified by:

preferredLayoutSize in interface LayoutManager

Parameters:

parent - the component which needs to be laid out

Returns:

a Dimension object containing the preferred dimensions

See Also:

• minimumLayoutSize(java.awt.Container)

minimumLayoutSize

public Dimension minimumLayoutSize(Container parent)

Returns the minimum dimensions needed to layout the components contained in the specified target container.

Specified by:

minimumLayoutSize in interface LayoutManager

Parameters:

parent - the component which needs to be laid out

Returns:

a Dimension object containing the minimum dimensions

See Also:

• preferredLayoutSize(java.awt.Container)

layoutContainer

public void layoutContainer(Container parent)

Called by the AWT when the specified container needs to be laid out.

Specified by:

layoutContainer in interface LayoutManager

Parameters:

parent - the container to lay out

Throws:

AWTError - if the target isn't the container specified to the BoxLayout constructor