org.jdesktop.swingx

Class MultiSplitLayout

java.lang.Object

org.jdesktop.swingx.MultiSplitLayout

All Implemented Interfaces:

LayoutManager

public class MultiSplitLayout
extends Object
implements LayoutManager

The MultiSplitLayout layout manager recursively arranges its components in row and column groups called "Splits". Elements of the layout are separated by gaps called "Dividers". The overall layout is defined with a simple tree model whose nodes are instances of MultiSplitLayout.Split, MultiSplitLayout.Divider, and MultiSplitLayout.Leaf. Named Leaf nodes represent the space allocated to a component that was added with a constraint that matches the Leaf's name. Extra space is distributed among row/column siblings according to their 0.0 to 1.0 weight. If no weights are specified then the last sibling always gets all of the extra space, or space reduction.

Although MultiSplitLayout can be used with any Container, it's the default layout manager for MultiSplitPane. MultiSplitPane supports interactively dragging the Dividers, accessibility, and other features associated with split panes.

All properties in this class are bound: when a properties value is changed, all PropertyChangeListeners are fired.

See Also:

MultiSplitPane

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MultiSplitLayout.Divider Models a single vertical/horiztonal divider.
static class	MultiSplitLayout.InvalidLayoutException The specified Node is either the wrong type or was configured incorrectly.
static class	MultiSplitLayout.Leaf Models a java.awt Component child.
static class	MultiSplitLayout.Node Base class for the nodes that model a MultiSplitLayout.
static class	MultiSplitLayout.Split Defines a vertical or horizontal subdivision into two or more tiles.

Constructor Summary

Constructors

Constructor and Description
MultiSplitLayout() Create a MultiSplitLayout with a default model with a single Leaf node named "default".
MultiSplitLayout(MultiSplitLayout.Node model) Create a MultiSplitLayout with the specified model.

Method Summary

Modifier and Type	Method and Description
void	addLayoutComponent(String name, Component child) Add a component to this MultiSplitLayout.
void	addPropertyChangeListener(PropertyChangeListener listener)
MultiSplitLayout.Divider	dividerAt(int x, int y) Return the Divider whose bounds contain the specified point, or null if there isn't one.
List<MultiSplitLayout.Divider>	dividersThatOverlap(Rectangle r) Return the Dividers whose bounds overlap the specified Rectangle.
int	getDividerSize() Returns the width of Dividers in Split rows, and the height of Dividers in Split columns.
boolean	getFloatingDividers()
MultiSplitLayout.Node	getModel() Return the root of the tree of Split, Leaf, and Divider nodes that define this layout.
PropertyChangeListener[]	getPropertyChangeListeners()
void	layoutContainer(Container parent) Compute the bounds of all of the Split/Divider/Leaf Nodes in the layout model, and then set the bounds of each child component with a matching Leaf Node.
Dimension	minimumLayoutSize(Container parent)
static MultiSplitLayout.Node	parseModel(String s) A convenience method that converts a string to a MultiSplitLayout model (a tree of Nodes) using a a simple syntax.
Dimension	preferredLayoutSize(Container parent)
static void	printModel(MultiSplitLayout.Node root) Print the tree with enough detail for simple debugging.
void	removeLayoutComponent(Component child) Removes the specified component from the layout.
void	removePropertyChangeListener(PropertyChangeListener listener)
void	setDividerSize(int dividerSize) Sets the width of Dividers in Split rows, and the height of Dividers in Split columns.
void	setFloatingDividers(boolean floatingDividers) If true, Leaf node bounds match the corresponding component's preferred size and Splits/Dividers are resized accordingly.
void	setModel(MultiSplitLayout.Node model) Set the root of the tree of Split, Leaf, and Divider nodes that define this layout.

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiSplitLayout

public MultiSplitLayout()

Create a MultiSplitLayout with a default model with a single Leaf node named "default". #see setModel

MultiSplitLayout

public MultiSplitLayout(MultiSplitLayout.Node model)

Create a MultiSplitLayout with the specified model. #see setModel

Method Detail

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener listener)

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener listener)

getPropertyChangeListeners

public PropertyChangeListener[] getPropertyChangeListeners()

getModel

public MultiSplitLayout.Node getModel()

Return the root of the tree of Split, Leaf, and Divider nodes that define this layout.

Returns:

the value of the model property

See Also:

setModel(org.jdesktop.swingx.MultiSplitLayout.Node)

setModel

public void setModel(MultiSplitLayout.Node model)

Set the root of the tree of Split, Leaf, and Divider nodes that define this layout. The model can be a Split node (the typical case) or a Leaf. The default value of this property is a Leaf named "default".

Parameters:

model - the root of the tree of Split, Leaf, and Divider node

Throws:

IllegalArgumentException - if model is a Divider or null

See Also:

getModel()

getDividerSize

public int getDividerSize()

Returns the width of Dividers in Split rows, and the height of Dividers in Split columns.

Returns:

the value of the dividerSize property

See Also:

setDividerSize(int)

setDividerSize

public void setDividerSize(int dividerSize)

Sets the width of Dividers in Split rows, and the height of Dividers in Split columns. The default value of this property is the same as for JSplitPane Dividers.

Parameters:

dividerSize - the size of dividers (pixels)

Throws:

IllegalArgumentException - if dividerSize < 0

See Also:

getDividerSize()

getFloatingDividers

public boolean getFloatingDividers()

Returns:

the value of the floatingDividers property

See Also:

setFloatingDividers(boolean)

setFloatingDividers

public void setFloatingDividers(boolean floatingDividers)

If true, Leaf node bounds match the corresponding component's preferred size and Splits/Dividers are resized accordingly. If false then the Dividers define the bounds of the adjacent Split and Leaf nodes. Typically this property is set to false after the (MultiSplitPane) user has dragged a Divider.

See Also:

getFloatingDividers()

addLayoutComponent

public void addLayoutComponent(String name,
                               Component child)

Add a component to this MultiSplitLayout. The name should match the name property of the Leaf node that represents the bounds of child. After layoutContainer() recomputes the bounds of all of the nodes in the model, it will set this child's bounds to the bounds of the Leaf node with name. Note: if a component was already added with the same name, this method does not remove it from its parent.

Specified by:

addLayoutComponent in interface LayoutManager

Parameters:

name - identifies the Leaf node that defines the child's bounds

child - the component to be added

See Also:

removeLayoutComponent(java.awt.Component)

removeLayoutComponent

public void removeLayoutComponent(Component child)

Removes the specified component from the layout.

Specified by:

removeLayoutComponent in interface LayoutManager

Parameters:

child - the component to be removed

See Also:

addLayoutComponent(java.lang.String, java.awt.Component)

preferredLayoutSize

public Dimension preferredLayoutSize(Container parent)

Specified by:

preferredLayoutSize in interface LayoutManager

minimumLayoutSize

public Dimension minimumLayoutSize(Container parent)

Specified by:

minimumLayoutSize in interface LayoutManager

layoutContainer

public void layoutContainer(Container parent)

Compute the bounds of all of the Split/Divider/Leaf Nodes in the layout model, and then set the bounds of each child component with a matching Leaf Node.

Specified by:

layoutContainer in interface LayoutManager

dividerAt

public MultiSplitLayout.Divider dividerAt(int x,
                                          int y)

Return the Divider whose bounds contain the specified point, or null if there isn't one.

Parameters:

x - x coordinate

y - y coordinate

Returns:

the Divider at x,y

dividersThatOverlap

public List<MultiSplitLayout.Divider> dividersThatOverlap(Rectangle r)

Return the Dividers whose bounds overlap the specified Rectangle.

Parameters:

r - target Rectangle

Returns:

the Dividers that overlap r

Throws:

IllegalArgumentException - if the Rectangle is null

parseModel

public static MultiSplitLayout.Node parseModel(String s)

A convenience method that converts a string to a MultiSplitLayout model (a tree of Nodes) using a a simple syntax. Nodes are represented by parenthetical expressions whose first token is one of ROW/COLUMN/LEAF. ROW and COLUMN specify horizontal and vertical Split nodes respectively, LEAF specifies a Leaf node. A Leaf's name and weight can be specified with attributes, name=myLeafName weight=myLeafWeight. Similarly, a Split's weight can be specified with weight=mySplitWeight.

For example, the following expression generates a horizontal Split node with three children: the Leafs named left and right, and a Divider in between:

 (ROW (LEAF name=left) (LEAF name=right weight=1.0))
 

Dividers should not be included in the string, they're added automatcially as needed. Because Leaf nodes often only need to specify a name, one can specify a Leaf by just providing the name. The previous example can be written like this:

 (ROW left (LEAF name=right weight=1.0))
 

Here's a more complex example. One row with three elements, the first and last of which are columns with two leaves each:

 (ROW (COLUMN weight=0.5 left.top left.bottom) 
      (LEAF name=middle)
      (COLUMN weight=0.5 right.top right.bottom))
 

This syntax is not intended for archiving or configuration files . It's just a convenience for examples and tests.

Returns:

the Node root of a tree based on s.

printModel

public static void printModel(MultiSplitLayout.Node root)

Print the tree with enough detail for simple debugging.