javax.swing.plaf.metal
Class MetalTreeUI

java.lang.Object
  javax.swing.plaf.ComponentUI
      javax.swing.plaf.TreeUI
          javax.swing.plaf.basic.BasicTreeUI
              javax.swing.plaf.metal.MetalTreeUI

public class MetalTreeUI

extends BasicTreeUI

The metal look and feel implementation of TreeUI.

MetalTreeUI allows for configuring how to visually render the spacing and delineation between nodes. The following hints are supported:

Angled	A line is drawn connecting the child to the parent. For handling of the root node refer to JTree.setRootVisible(boolean) and JTree.setShowsRootHandles(boolean).
Horizontal	A horizontal line is drawn dividing the children of the root node.
None	Do not draw any visual indication between nodes.

As it is typically impratical to obtain the TreeUI from the JTree and cast to an instance of MetalTreeUI you enable this property via the client property JTree.lineStyle. For example, to switch to Horizontal style you would do: tree.putClientProperty("JTree.lineStyle", "Horizontal");

The default is Angled.

Author:

Tom Santos, Steve Wilson (value add stuff)

Nested Class Summary

(package private) class

MetalTreeUI.LineListener This class listens for changes in line style

Nested classes inherited from class javax.swing.plaf.basic.BasicTreeUI

BasicTreeUI.CellEditorHandler, BasicTreeUI.ComponentHandler, BasicTreeUI.FocusHandler, BasicTreeUI.KeyHandler, BasicTreeUI.MouseHandler, BasicTreeUI.MouseInputHandler, BasicTreeUI.NodeDimensionsHandler, BasicTreeUI.PropertyChangeHandler, BasicTreeUI.SelectionModelPropertyChangeHandler, BasicTreeUI.TreeCancelEditingAction, BasicTreeUI.TreeExpansionHandler, BasicTreeUI.TreeHomeAction, BasicTreeUI.TreeIncrementAction, BasicTreeUI.TreeModelHandler, BasicTreeUI.TreePageAction, BasicTreeUI.TreeSelectionHandler, BasicTreeUI.TreeToggleAction, BasicTreeUI.TreeTraverseAction

Field Summary

private static int	HORIZ_LINE_STYLE
private static String	HORIZ_STYLE_STRING
private static int	LEG_LINE_STYLE
private static String	LEG_LINE_STYLE_STRING
private static String	LINE_STYLE
private static Color	lineColor
private int	lineStyle
private java.beans.PropertyChangeListener	lineStyleListener
private static int	NO_LINE_STYLE
private static String	NO_STYLE_STRING

Fields inherited from class javax.swing.plaf.basic.BasicTreeUI

cellEditor, collapsedIcon, createdCellEditor, createdRenderer, currentCellRenderer, depthOffset, drawingCache, editingComponent, editingPath, editingRow, editorHasDifferentSize, expandedIcon, largeModel, lastSelectedRow, leftChildIndent, nodeDimensions, preferredMinSize, preferredSize, rendererPane, rightChildIndent, stopEditingInCompleteEditing, totalChildIndent, tree, treeModel, treeSelectionModel, treeState, validCachedPreferredSize

Constructor Summary

MetalTreeUI()

Method Summary

static ComponentUI	createUI(JComponent x) Returns an instance of the UI delegate for the specified component.
protected void	decodeLineStyle(Object lineStyleFlag) this function converts between the string passed into the client property and the internal representation (currently and int)
protected int	getHorizontalLegBuffer() The horizontal element of legs between nodes starts at the right of the left-hand side of the child node by default.
void	installUI(JComponent c) Configures the specified component appropriate for the look and feel.
protected boolean	isLocationInExpandControl(int row, int rowLevel, int mouseX, int mouseY)
void	paint(Graphics g, JComponent c) Paints the specified component appropriate for the look and feel.
protected void	paintHorizontalPartOfLeg(Graphics g, Rectangle clipBounds, Insets insets, Rectangle bounds, TreePath path, int row, boolean isExpanded, boolean hasBeenExpanded, boolean isLeaf) Paints the horizontal part of the leg.
protected void	paintHorizontalSeparators(Graphics g, JComponent c)
protected void	paintVerticalPartOfLeg(Graphics g, Rectangle clipBounds, Insets insets, TreePath path) Paints the vertical part of the leg.
void	uninstallUI(JComponent c) Reverses configuration which was done on the specified component during installUI.

Methods inherited from class javax.swing.plaf.basic.BasicTreeUI

cancelEditing, checkForClickInExpandControl, completeEditing, completeEditing, completeUIInstall, completeUIUninstall, configureLayoutCache, createCellEditorListener, createCellRendererPane, createComponentListener, createDefaultCellEditor, createDefaultCellRenderer, createFocusListener, createKeyListener, createLayoutCache, createMouseListener, createNodeDimensions, createPropertyChangeListener, createSelectionModelPropertyChangeListener, createTreeExpansionListener, createTreeModelListener, createTreeSelectionListener, drawCentered, drawDashedHorizontalLine, drawDashedVerticalLine, ensureRowsAreVisible, getCellEditor, getCellRenderer, getClosestPathForLocation, getCollapsedIcon, getEditingPath, getExpandedIcon, getHashColor, getLastChildPath, getLeftChildIndent, getMaximumSize, getMinimumSize, getModel, getPathBounds, getPathForRow, getPreferredMinSize, getPreferredSize, getPreferredSize, getRightChildIndent, getRowCount, getRowForPath, getRowHeight, getSelectionModel, getShowsRootHandles, getVerticalLegBuffer, handleExpandControlClick, installComponents, installDefaults, installKeyboardActions, installListeners, isEditable, isEditing, isLargeModel, isLeaf, isLocationInExpandControl, isMultiSelectEvent, isRootVisible, isToggleEvent, isToggleSelectionEvent, paintExpandControl, paintHorizontalLine, paintRow, paintVerticalLine, pathWasCollapsed, pathWasExpanded, prepareForUIInstall, prepareForUIUninstall, selectPathForEvent, setCellEditor, setCellRenderer, setCollapsedIcon, setEditable, setExpandedIcon, setHashColor, setLargeModel, setLeftChildIndent, setModel, setPreferredMinSize, setRightChildIndent, setRootVisible, setRowHeight, setSelectionModel, setShowsRootHandles, shouldPaintExpandControl, startEditing, startEditingAtPath, stopEditing, toggleExpandState, uninstallComponents, uninstallDefaults, uninstallKeyboardActions, uninstallListeners, updateCachedPreferredSize, updateCellEditor, updateDepthOffset, updateExpandedDescendants, updateLayoutCacheExpandedNodes, updateRenderer, updateSize

Methods inherited from class javax.swing.plaf.ComponentUI

contains, getAccessibleChild, getAccessibleChildrenCount, update

Methods inherited from class java.lang.Object

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

Field Detail

lineColor

private static Color lineColor

LINE_STYLE

private static final String LINE_STYLE

See Also:

Constant Field Values

LEG_LINE_STYLE_STRING

private static final String LEG_LINE_STYLE_STRING

See Also:

Constant Field Values

HORIZ_STYLE_STRING

private static final String HORIZ_STYLE_STRING

See Also:

Constant Field Values

NO_STYLE_STRING

private static final String NO_STYLE_STRING

See Also:

Constant Field Values

LEG_LINE_STYLE

private static final int LEG_LINE_STYLE

See Also:

Constant Field Values

HORIZ_LINE_STYLE

private static final int HORIZ_LINE_STYLE

See Also:

Constant Field Values

NO_LINE_STYLE

private static final int NO_LINE_STYLE

See Also:

Constant Field Values

lineStyle

private int lineStyle

lineStyleListener

private java.beans.PropertyChangeListener lineStyleListener

Constructor Detail

MetalTreeUI

public MetalTreeUI()

Method Detail

createUI

public static ComponentUI createUI(JComponent x)

Description copied from class: ComponentUI

Returns an instance of the UI delegate for the specified component. Each subclass must provide its own static createUI method that returns an instance of that UI delegate subclass. If the UI delegate subclass is stateless, it may return an instance that is shared by multiple components. If the UI delegate is stateful, then it should return a new instance per component. The default implementation of this method throws an error, as it should never be invoked.

getHorizontalLegBuffer

protected int getHorizontalLegBuffer()

Description copied from class: BasicTreeUI

The horizontal element of legs between nodes starts at the right of the left-hand side of the child node by default. This method makes the leg end before that.

Overrides:

getHorizontalLegBuffer in class BasicTreeUI

installUI

public void installUI(JComponent c)

Description copied from class: ComponentUI

Configures the specified component appropriate for the look and feel. This method is invoked when the ComponentUI instance is being installed as the UI delegate on the specified component. This method should completely configure the component for the look and feel, including the following:

1. Install any default property values for color, fonts, borders, icons, opacity, etc. on the component. Whenever possible, property values initialized by the client program should not be overridden.
2. Install a LayoutManager on the component if necessary.
3. Create/add any required sub-components to the component.
4. Create/install event listeners on the component.
5. Create/install a PropertyChangeListener on the component in order to detect and respond to component property changes appropriately.
6. Install keyboard UI (mnemonics, traversal, etc.) on the component.
7. Initialize any appropriate instance data.

Overrides:

installUI in class BasicTreeUI

uninstallUI

public void uninstallUI(JComponent c)

Description copied from class: ComponentUI

Reverses configuration which was done on the specified component during installUI. This method is invoked when this UIComponent instance is being removed as the UI delegate for the specified component. This method should undo the configuration performed in installUI, being careful to leave the JComponent instance in a clean state (no extraneous listeners, look-and-feel-specific property objects, etc.). This should include the following:

1. Remove any UI-set borders from the component.
2. Remove any UI-set layout managers on the component.
3. Remove any UI-added sub-components from the component.
4. Remove any UI-added event/property listeners from the component.
5. Remove any UI-installed keyboard UI from the component.
6. Nullify any allocated instance data objects to allow for GC.

Overrides:

uninstallUI in class BasicTreeUI

decodeLineStyle

protected void decodeLineStyle(Object lineStyleFlag)

this function converts between the string passed into the client property and the internal representation (currently and int)

isLocationInExpandControl

protected boolean isLocationInExpandControl(int row,
                                            int rowLevel,
                                            int mouseX,
                                            int mouseY)

paint

public void paint(Graphics g,
                  JComponent c)

Description copied from class: ComponentUI

Paints the specified component appropriate for the look and feel. This method is invoked from the ComponentUI.update method when the specified component is being painted. Subclasses should override this method and use the specified Graphics object to render the content of the component.

Overrides:

paint in class BasicTreeUI

paintHorizontalSeparators

protected void paintHorizontalSeparators(Graphics g,
                                         JComponent c)

paintVerticalPartOfLeg

protected void paintVerticalPartOfLeg(Graphics g,
                                      Rectangle clipBounds,
                                      Insets insets,
                                      TreePath path)

Description copied from class: BasicTreeUI

Paints the vertical part of the leg. The receiver should NOT modify clipBounds, insets.

Overrides:

paintVerticalPartOfLeg in class BasicTreeUI

paintHorizontalPartOfLeg

protected void paintHorizontalPartOfLeg(Graphics g,
                                        Rectangle clipBounds,
                                        Insets insets,
                                        Rectangle bounds,
                                        TreePath path,
                                        int row,
                                        boolean isExpanded,
                                        boolean hasBeenExpanded,
                                        boolean isLeaf)

Description copied from class: BasicTreeUI

Paints the horizontal part of the leg. The receiver should NOT modify clipBounds, or insets.

NOTE: parentRow can be -1 if the root is not visible.

Overrides:

paintHorizontalPartOfLeg in class BasicTreeUI