LayoutStyle (Java Platform SE 6) (original) (raw)

javax.swing

Class LayoutStyle

java.lang.Object extended by javax.swing.LayoutStyle

public abstract class LayoutStyle

LayoutStyle provides information about how to position components. This class is primarily useful for visual tools and layout managers. Most developers will not need to use this class.

You typically don't set or create aLayoutStyle. Instead use the static methodgetInstance to obtain the current instance.

Since:

1.6

Nested Class Summary
static class	LayoutStyle.ComponentPlacement ComponentPlacement is an enumeration of the possible ways two components can be placed relative to each other.

Constructor Summary
LayoutStyle() Creates a new LayoutStyle.

Method Summary
abstract int	[getContainerGap](../../javax/swing/LayoutStyle.html#getContainerGap%28javax.swing.JComponent, int, java.awt.Container%29)(JComponent component, int position,Container parent) Returns the amount of space to place between the component and specified edge of its parent.
static LayoutStyle	getInstance() Returns the shared instance of LayoutStyle.
abstract int	[getPreferredGap](../../javax/swing/LayoutStyle.html#getPreferredGap%28javax.swing.JComponent, javax.swing.JComponent, javax.swing.LayoutStyle.ComponentPlacement, int, java.awt.Container%29)(JComponent component1,JComponent component2,LayoutStyle.ComponentPlacement type, int position,Container parent) Returns the amount of space to use between two components.
static void	setInstance(LayoutStyle style) Sets the shared instance of LayoutStyle.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, [wait](../../java/lang/Object.html#wait%28long, int%29)

Constructor Detail

LayoutStyle

public LayoutStyle()

Creates a new LayoutStyle. You generally don't create a LayoutStyle. Instead use the methodgetInstance to obtain the currentLayoutStyle.

Method Detail

setInstance

public static void setInstance(LayoutStyle style)

Sets the shared instance of LayoutStyle. Specifyingnull results in using the LayoutStyle from the current LookAndFeel.

Parameters:

style - the LayoutStyle, or null

See Also:

getInstance()

getInstance

public static LayoutStyle getInstance()

Returns the shared instance of LayoutStyle. If an instance has not been specified in setInstance, this will return the LayoutStyle from the current LookAndFeel.

Returns:

the shared instance of LayoutStyle

See Also:

LookAndFeel.getLayoutStyle()

getPreferredGap

public abstract int getPreferredGap(JComponent component1, JComponent component2, LayoutStyle.ComponentPlacement type, int position, Container parent)

Returns the amount of space to use between two components. The return value indicates the distance to placecomponent2 relative to component1. For example, the following returns the amount of space to place between component2 and component1 when component2 is placed vertically abovecomponent1:

int gap = getPreferredGap(component1, component2, ComponentPlacement.RELATED, SwingConstants.NORTH, parent);

The type parameter indicates the relation between the two components. If the two components will be contained in the same parent and are showing similar logically related items, use RELATED. If the two components will be contained in the same parent but show logically unrelated items use UNRELATED. Some look and feels may not distinguish between the RELATED andUNRELATED types.

The return value is not intended to take into account the current size and position of component2 orcomponent1. The return value may take into consideration various properties of the components. For example, the space may vary based on font size, or the preferred size of the component.

Parameters:

component1 - the JComponent component2 is being placed relative to

component2 - the JComponent being placed

position - the position component2 is being placed relative to component1; one ofSwingConstants.NORTH,SwingConstants.SOUTH,SwingConstants.EAST orSwingConstants.WEST

type - how the two components are being placed

parent - the parent of component2; this may differ from the actual parent and it may be null

Returns:

the amount of space to place between the two components

Throws:

[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang") - if component1,component2 or type isnull

[IllegalArgumentException](../../java/lang/IllegalArgumentException.html "class in java.lang") - if position is not one of SwingConstants.NORTH,SwingConstants.SOUTH,SwingConstants.EAST or SwingConstants.WEST

Since:

1.6

See Also:

LookAndFeel.getLayoutStyle()

getContainerGap

public abstract int getContainerGap(JComponent component, int position, Container parent)

Returns the amount of space to place between the component and specified edge of its parent.

Parameters:

component - the JComponent being positioned

position - the position component is being placed relative to its parent; one ofSwingConstants.NORTH,SwingConstants.SOUTH,SwingConstants.EAST orSwingConstants.WEST

parent - the parent of component; this may differ from the actual parent and may be null

Returns:

the amount of space to place between the component and specified edge

Throws:

Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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