Package org.jdesktop.swingx

Class MultiSplitLayout

  • All Implemented Interfaces:
    java.awt.LayoutManager
    public class MultiSplitLayout
extends java.lang.Object
implements java.awt.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.

    Author:
    Hans Muller, Luan O'Carroll
    See Also:
    JXMultiSplitPane

    • Constructor Detail

      • MultiSplitLayout

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

      • MultiSplitLayout

        public MultiSplitLayout​(boolean layoutByWeight)
        Create a MultiSplitLayout with a default model with a single Leaf node named "default".
        Parameters:
        layoutByWeight - if true the layout is initialized in proportion to the node weights rather than the component preferred sizes. #see setModel

      • MultiSplitLayout

        public MultiSplitLayout​(MultiSplitLayout.Node model)
        Create a MultiSplitLayout with the specified model. #see setModel

    • Method Detail

      • layoutByWeight

        public void layoutByWeight​(java.awt.Container parent)
        Set the size of the child components to match the weights of the children. If the components to not all specify a weight then the available layout space is divided equally between the components.

      • getComponentForNode

        public java.awt.Component getComponentForNode​(MultiSplitLayout.Node n)
        Get the component associated with a MultiSplitLayout.Node
        Parameters:
        n - the layout node
        Returns:
        the component handled by the layout or null if not found

      • getNodeForComponent

        public MultiSplitLayout.Node getNodeForComponent​(java.awt.Component comp)
        Get the MultiSplitLayout.Node associated with a component
        Parameters:
        comp - the component being positioned by the layout
        Returns:
        the node associated with the component

      • getNodeForName

        public MultiSplitLayout.Node getNodeForName​(java.lang.String name)
        Get the MultiSplitLayout.Node associated with a component
        Parameters:
        name - the name used to associate a component with the layout
        Returns:
        the node associated with the component

      • getNameForComponent

        public java.lang.String getNameForComponent​(java.awt.Component child)
        Get the name used to map a component
        Parameters:
        child - the component
        Returns:
        the name used to map the component or null if no mapping is found

      • getNodeForComponent

        public MultiSplitLayout.Node getNodeForComponent​(MultiSplitLayout.Split split,
                                                 java.awt.Component comp)
        Get the MultiSplitLayout.Node associated with a component
        Parameters:
        split - the layout split that owns the requested node
        comp - the component being positioned by the layout
        Returns:
        the node associated with the component

      • getNodeForName

        public MultiSplitLayout.Node getNodeForName​(MultiSplitLayout.Split split,
                                            java.lang.String name)
        Get the MultiSplitLayout.Node associated with a component
        Parameters:
        split - the layout split that owns the requested node
        name - the name used to associate a component with the layout
        Returns:
        the node associated with the component

      • hasModel

        public boolean hasModel()
        Is there a valid model for the layout?
        Returns:
        true if there is a model

      • addPropertyChangeListener

        public void addPropertyChangeListener​(java.beans.PropertyChangeListener listener)

      • removePropertyChangeListener

        public void removePropertyChangeListener​(java.beans.PropertyChangeListener listener)

      • getPropertyChangeListeners

        public java.beans.PropertyChangeListener[] getPropertyChangeListeners()

      • 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:
        java.lang.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:
        java.lang.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()

      • getRemoveDividers

        public boolean getRemoveDividers()
        Returns:
        the value of the removeDividers property
        See Also:
        setRemoveDividers(boolean)

      • setRemoveDividers

        public void setRemoveDividers​(boolean removeDividers)
        If true, the next divider is removed when a component is removed from the layout. If false, only the node itself is removed. Normally the next divider should be removed from the layout when a component is removed.
        Parameters:
        removeDividers - true to removed the next divider whena component is removed from teh layout

      • addLayoutComponent

        public void addLayoutComponent​(java.lang.String name,
                               java.awt.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 java.awt.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​(java.awt.Component child)
        Removes the specified component from the layout.
        Specified by:
        removeLayoutComponent in interface java.awt.LayoutManager
        Parameters:
        child - the component to be removed
        See Also:
        addLayoutComponent(java.lang.String, java.awt.Component)

      • displayNode

        public void displayNode​(java.lang.String name,
                        boolean visible)
        Show/Hide nodes. Any dividers that are no longer required due to one of the nodes being made visible/invisible are also shown/hidder. The visibility of the component managed by the node is also changed by this method
        Parameters:
        name - the node name
        visible - the new node visible state

      • minimumNodeSize

        public java.awt.Dimension minimumNodeSize​(MultiSplitLayout.Node root)
        Get the minimum size of this node. Sums the minumum sizes of rows or columns to get the overall minimum size for the layout node, including the dividers.
        Parameters:
        root - the node whose size is required.
        Returns:
        the minimum size.

      • maximumNodeSize

        public java.awt.Dimension maximumNodeSize​(MultiSplitLayout.Node root)
        Get the maximum size of this node. Sums the minumum sizes of rows or columns to get the overall maximum size for the layout node, including the dividers.
        Parameters:
        root - the node whose size is required.
        Returns:
        the minimum size.

      • preferredLayoutSize

        public java.awt.Dimension preferredLayoutSize​(java.awt.Container parent)
        Specified by:
        preferredLayoutSize in interface java.awt.LayoutManager

      • minimumLayoutSize

        public java.awt.Dimension minimumLayoutSize​(java.awt.Container parent)
        Specified by:
        minimumLayoutSize in interface java.awt.LayoutManager

      • getLayoutMode

        public int getLayoutMode()
        Get the layout mode
        Returns:
        current layout mode

      • setLayoutMode

        public void setLayoutMode​(int layoutMode)
        Set the layout mode. By default this layout uses the preferred and minimum sizes of the child components. To ignore the minimum size set the layout mode to MultiSplitLayout.LAYOUT_NO_MIN_SIZE.
        Parameters:
        layoutMode - the layout mode
        • DEFAULT_LAYOUT - use the preferred and minimum sizes when sizing the children
        • LAYOUT_NO_MIN_SIZE - ignore the minimum size when sizing the children

      • getUserMinSize

        public int getUserMinSize()
        Get the minimum node size
        Returns:
        the minimum size

      • setUserMinSize

        public void setUserMinSize​(int minSize)
        Set the user defined minimum size support in the USER_MIN_SIZE_LAYOUT layout mode.
        Parameters:
        minSize - the new minimum size

      • getLayoutByWeight

        public boolean getLayoutByWeight()
        Get the layoutByWeight falg. If the flag is true the layout initializes itself using the model weights
        Returns:
        the layoutByWeight

      • setLayoutByWeight

        public void setLayoutByWeight​(boolean state)
        Sset the layoutByWeight falg. If the flag is true the layout initializes itself using the model weights
        Parameters:
        state - the new layoutByWeight to set

      • layoutContainer

        public void layoutContainer​(java.awt.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 java.awt.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 java.util.List<MultiSplitLayout.Divider> dividersThatOverlap​(java.awt.Rectangle r)
        Return the Dividers whose bounds overlap the specified Rectangle.
        Parameters:
        r - target Rectangle
        Returns:
        the Dividers that overlap r
        Throws:
        java.lang.IllegalArgumentException - if the Rectangle is null

      • parseModel

        public static MultiSplitLayout.Node parseModel​(java.lang.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.