public abstract class EnhancedTreeCellRenderer
extends javax.swing.tree.DefaultTreeCellRenderer
DefaultTreeCellRenderer to be used as superclass for custom
tree cell renderers. Using DefaultTreeCellRenderer as superclass for a custom tree
cell renderer without further measures is not stable in regards to on-the-fly Look and Feel
changes, at least not with Java 6. For Java 7 it should be tested again.
With Java 6 the DefaultTreeCellRenderer initializes some values according to the
Look and Feel in its constructor. If the DefaultTreeCellRenderer is created by the
JTree code, it is recreated on a Look and Feel change. This way all works fine. But
if a tree cell renderer is set explicitly on the JTree, no matter whether
DefaultTreeCellRenderer, a subclass of it or a complete own implementation, the
set instance is used beyond Look and Feel boundaries and this causes two problems.
DefaultTreeCellRenderer
are not reset according to the new Look and Feel. Some values are partly set by the
JTree code, but this is not complete and reliable and thus the renderer paints
the tree cells wrongly.
JTree, then the sizes of
the tree cells which are saved in a cache are recalculated. Only after that,
the children of the JTree get the new Look and Feel applied, amongst them
also the tree cell renderer.JTree which influences size calculations.
To work around the described problems this enhanced tree cell renderer listens for Look
and Feel changes on the JTree where this renderer is used, requests a subclass
to create a new instance of the renderer and sets it on the JTree. By doing so
the DefaultTreeCellRenderer reinitializes to the new Look and Feel in its
constructor and the JTree recalculates the cached size values because a different
object is set as tree cell renderer.
javax.swing.JLabel.AccessibleJLabeljavax.swing.JComponent.AccessibleJComponentbackgroundNonSelectionColor, backgroundSelectionColor, borderSelectionColor, closedIcon, hasFocus, leafIcon, openIcon, selected, textNonSelectionColor, textSelectionColorlistenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOWaccessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT| Constructor and Description |
|---|
EnhancedTreeCellRenderer() |
| Modifier and Type | Method and Description |
|---|---|
protected abstract void |
configureTreeCellRendererComponent(javax.swing.JTree tree,
java.lang.Object value,
boolean selected,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus)
Configures this instance of the renderer component based on the passed in
components.
|
java.awt.Component |
getTreeCellRendererComponent(javax.swing.JTree tree,
java.lang.Object value,
boolean selected,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) |
protected abstract javax.swing.tree.TreeCellRenderer |
newInstance()
Creates a new instance of the tree cell renderer.
|
firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackgroundNonSelectionColor, getBackgroundSelectionColor, getBorderSelectionColor, getClosedIcon, getDefaultClosedIcon, getDefaultLeafIcon, getDefaultOpenIcon, getFont, getLeafIcon, getOpenIcon, getPreferredSize, getTextNonSelectionColor, getTextSelectionColor, invalidate, paint, repaint, repaint, repaint, revalidate, setBackground, setBackgroundNonSelectionColor, setBackgroundSelectionColor, setBorderSelectionColor, setClosedIcon, setFont, setLeafIcon, setOpenIcon, setTextNonSelectionColor, setTextSelectionColor, updateUI, validatecheckHorizontalKey, checkVerticalKey, getAccessibleContext, getDisabledIcon, getDisplayedMnemonic, getDisplayedMnemonicIndex, getHorizontalAlignment, getHorizontalTextPosition, getIcon, getIconTextGap, getLabelFor, getText, getUI, getUIClassID, getVerticalAlignment, getVerticalTextPosition, imageUpdate, paramString, setDisabledIcon, setDisplayedMnemonic, setDisplayedMnemonic, setDisplayedMnemonicIndex, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setIconTextGap, setLabelFor, setText, setUI, setVerticalAlignment, setVerticalTextPositionaddAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, updateadd, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validateTreeaction, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCyclepublic final java.awt.Component getTreeCellRendererComponent(javax.swing.JTree tree,
java.lang.Object value,
boolean selected,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus)
getTreeCellRendererComponent in interface javax.swing.tree.TreeCellRenderergetTreeCellRendererComponent in class javax.swing.tree.DefaultTreeCellRendererprotected abstract javax.swing.tree.TreeCellRenderer newInstance()
Any one-time initializations that are necessary and are not made in the constructor should be made in this method. The simplest implementation of this method will just call the constructor and return the result.
This is an instance method so that the new instance can be set up with information from the current instance.
protected abstract void configureTreeCellRendererComponent(javax.swing.JTree tree,
java.lang.Object value,
boolean selected,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus)
getTreeCellRendererComponent(JTree, Object, boolean, boolean, boolean, int, boolean).tree - The tree in which this renderer component is used currentlyvalue - The value to be displayed for the tree cell to be renderedselected - Whether the tree cell to be rendered is selectedexpanded - Whether the tree cell to be rendered is expandedleaf - Whether the tree cell to be rendered is a leafrow - The row index of the tree cell to be renderedhasFocus - Whether the tree cell to be rendered has the focus