org.xhtmlrenderer.simple

Class XHTMLPanel

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JPanel

org.xhtmlrenderer.swing.RootPanel

org.xhtmlrenderer.swing.BasicPanel

org.xhtmlrenderer.simple.XHTMLPanel

All Implemented Interfaces:

java.awt.event.ComponentListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, java.util.EventListener, javax.accessibility.Accessible, FSCanvas, UserInterface, FormSubmissionListener, RepaintListener

Direct Known Subclasses:

ScalableXHTMLPanel

public class XHTMLPanel
extends BasicPanel

XHTMLPanel is a simple Swing component that renders valid XHTML content in a Java program. It is scrolling aware so you can safely drop it into a JScrollPane. The most common usage is to stuff a URL into it and then add it to your JFrame. Ex:

 import org.xhtmlrenderer.simple.*;
 .....
 

 public static void main(String[] args) {
 

 // set up the xhtml panel XHTMLPanel xhtml = new XHTMLPanel();
 xhtml.setDocument(new URL("http://myserver.com/page.xhtml"));
 

 JScrollPane scroll = new JScrollPane(xhtml);
 JFrame frame = new JFrame("Demo");
 frame.getContentPane().add(scroll);
 frame.pack();
 frame.setSize(500,600);
 frame.show();
 }
 

XHTMLPanel renders XHTML and XML which can be loaded as valid Document instances. You should make sure the document you want to render is well-formed. For XHTML, there is always a default stylesheet available, even if no CSS is attached to the XHTML you are loading. For XML, there is no default stylesheet, so you should have one attached to your XML before trying to render it using the xml-stylesheer processing instruction. XHTMLPanel has methods to load documents from a uri (setDocument(String uri)), from a Document instance (setDocument(Document)) or from an InputStream (BasicPanel.setDocument(java.io.InputStream,String)).

XHTMLPanel also lets you make simple changes with simple methods like setFontScalingFactor(float). If you want to make other changes you will need to get the rendering context (BasicPanel.getSharedContext()) and call methods on that. Ex:

 XHTMLPanel xhtml = new XHTMLPanel();
 RenderingContext ctx = xhtml.getRenderingContext();
 ctx.setLogging(true); // turn on logging
 ctx.setValidating(true); // turn on doctype validation
 ctx.addFont(fnt,"Arial"); // redefine a font
 ctx.setDomImplementation("com.cooldom.DomImpl");
 

XHTMLPanel comes with a pre-installed MouseListener which handles :hover events used for rollovers ( @see org.xhtmlrenderer.swing.HoverListener ). XHTMLPanel also comes with a pre-installed LinkListener used to follow links. ( @see org.xhtmlrenderer.swing.LinkListener ) If you want to disable these for some reason you can get the list of mouse listeners and remove them all.

Author:

Joshua Marinacci (joshy@joshy.net)

See Also:

The Flying Saucer Home Page, RenderingContext, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JPanel

javax.swing.JPanel.AccessibleJPanel

Nested classes/interfaces inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

Fields inherited from class org.xhtmlrenderer.swing.BasicPanel

formSubmissionListener

Fields inherited from class org.xhtmlrenderer.swing.RootPanel

active_element, doc, documentListeners, enclosingScrollPane, focus_element, hovered_element, sharedContext

Fields inherited from class javax.swing.JComponent

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors

Constructor and Description
XHTMLPanel() Instantiates an XHTMLPanel with no Document loaded by default.
XHTMLPanel(UserAgentCallback uac) Instantiates a panel with a custom UserAgentCallback implementation.

Method Summary

Methods

Modifier and Type	Method and Description
void	decrementFontSize() Decrements all rendered fonts on the current document by the current scaling factor for the panel.
float	getMaxFontScale() Returns the maximum font scaling that may be applied, e.g.
float	getMinFontScale() Returns the minimum font scaling that may be applied, e.g.
void	incrementFontSize() Increments all rendered fonts on the current document by the current scaling factor for the panel.
void	relayout() Lays out the current document again, and re-renders.
void	resetFontSize() Resets all rendered fonts on the current document to the font size specified in the document's styling instructions.
void	setDocument(org.w3c.dom.Document doc) Renders an XML Document instance.
void	setDocument(org.w3c.dom.Document doc, java.lang.String url) Renders a Document using a URL as a base URL for relative paths.
void	setDocument(java.io.File file) Renders a Document read from an InputStream using a URL as a base URL for relative paths.
void	setDocument(java.io.InputStream stream, java.lang.String url) Renders a Document read from an InputStream using a URL as a base URL for relative paths.
void	setDocument(java.lang.String uri) Loads and renders a Document given a uri.
void	setFontScalingFactor(float scaling) Sets the scaling factor used by incrementFontSize() and decrementFontSize()--both scale the font up or down by this scaling factor.
void	setMaxFontScale(float f) Sets the maximum font scaling that may be applied, e.g.
void	setMinFontScale(float f) Sets the minimum font scaling that may be applied, e.g.
void	setSharedContext(SharedContext ctx) Sets the RenderingContext attribute of the XHTMLPanel object.

Methods inherited from class org.xhtmlrenderer.swing.BasicPanel

addDocumentListener, addMouseTrackingListener, assignPagePrintPositions, doRender, getDocument, getDocumentTitle, getFixedRectangle, getMouseTrackingListeners, getSharedContext, getURL, isActive, isCenteredPagedView, isFocus, isHover, isInteractive, isOpaque, loadDocument, paintComponent, paintPage, printTree, reloadDocument, reloadDocument, removeDocumentListener, removeMouseTrackingListener, resetMouseTracker, scrollTo, setCenteredPagedView, setDocument, setDocument, setDocumentFromString, setDocumentRelative, setFormSubmissionListener, setInteractive, setLayout, setOpaque, setSize, submit

Methods inherited from class org.xhtmlrenderer.swing.RootPanel

addNotify, componentHidden, componentMoved, componentResized, componentShown, doDocumentLayout, find, find, fireDocumentLoaded, fireDocumentStarted, fireOnLayoutException, fireOnRenderException, getCellRendererPane, getLayoutContext, getLayoutWidth, getRootBox, getRootLayer, getScreenExtents, init, isDefaultFontFromComponent, isExtentsHaveChanged, isNeedRelayout, isPrintView, newLayoutContext, newRenderingContext, removeNotify, repaintRequested, resetScrollPosition, setDefaultFontFromComponent, setDocument, setEnclosingScrollPane, setNeedRelayout, setRootBox, validate

Methods inherited from class javax.swing.JPanel

getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class javax.swing.JComponent

addAncestorListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, 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, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, 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, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, transferFocusDownCycle, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, 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, imageUpdate, 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, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.xhtmlrenderer.extend.FSCanvas

getX, getY

Constructor Detail

XHTMLPanel

public XHTMLPanel()

Instantiates an XHTMLPanel with no Document loaded by default.

XHTMLPanel

public XHTMLPanel(UserAgentCallback uac)

Instantiates a panel with a custom UserAgentCallback implementation.

Parameters:

uac - The custom UserAgentCallback implementation.

Method Detail

relayout

public void relayout()

Lays out the current document again, and re-renders.

Overrides:

relayout in class RootPanel

setDocument

public void setDocument(java.lang.String uri)

Loads and renders a Document given a uri. The uri is resolved by the UserAgentCallback

Overrides:

setDocument in class BasicPanel

Parameters:

uri -

setDocument

public void setDocument(org.w3c.dom.Document doc)

Renders an XML Document instance. Make sure that no relative resources are needed

Parameters:

doc - The document to render.

setDocument

public void setDocument(org.w3c.dom.Document doc,
               java.lang.String url)

Renders a Document using a URL as a base URL for relative paths.

Overrides:

setDocument in class BasicPanel

Parameters:

doc - The new document value

url - The new document value

setDocument

public void setDocument(java.io.InputStream stream,
               java.lang.String url)
                 throws java.lang.Exception

Renders a Document read from an InputStream using a URL as a base URL for relative paths.

Overrides:

setDocument in class BasicPanel

Parameters:

stream - The stream to read the Document from.

url - The URL used to resolve relative path references.

Throws:

java.lang.Exception

setDocument

public void setDocument(java.io.File file)
                 throws java.lang.Exception

Renders a Document read from an InputStream using a URL as a base URL for relative paths.

Parameters:

file - The file to read the Document from. Relative paths will be resolved based on the file's parent directory.

Throws:

java.lang.Exception

setSharedContext

public void setSharedContext(SharedContext ctx)

Sets the RenderingContext attribute of the XHTMLPanel object. Generally you should not use this unless you have a heavily customized context to use. To modify just some rendering behavior, consider using BasicPanel.getSharedContext() to retrieve the current context, and using mutators to change its behavior.

Overrides:

setSharedContext in class BasicPanel

Parameters:

ctx - A new RenderingContext to use for rendering.

setFontScalingFactor

public void setFontScalingFactor(float scaling)

Sets the scaling factor used by incrementFontSize() and decrementFontSize()--both scale the font up or down by this scaling factor. The scaling roughly modifies the font size as a multiplier or divisor. A scaling factor of 1.2 applied against a font size of 10pt results in a scaled font of 12pt. The default scaling factor is 1.2F.

incrementFontSize

public void incrementFontSize()

Increments all rendered fonts on the current document by the current scaling factor for the panel. Scaling applies culmulatively, which means that multiple calls to this method scale fonts larger and larger by applying the current scaling factor against itself. You can modify the scaling factor by setFontScalingFactor(float), and reset to the document's specified font size with resetFontSize().

resetFontSize

public void resetFontSize()

Resets all rendered fonts on the current document to the font size specified in the document's styling instructions.

decrementFontSize

public void decrementFontSize()

Decrements all rendered fonts on the current document by the current scaling factor for the panel. Scaling applies culmulatively, which means that multiple calls to this method scale fonts smaller and smaller by applying the current scaling factor against itself. You can modify the scaling factor by setFontScalingFactor(float), and reset to the document's specified font size with resetFontSize().

getMaxFontScale

public float getMaxFontScale()

Returns the maximum font scaling that may be applied, e.g. 3 times assigned font size.

getMinFontScale

public float getMinFontScale()

Returns the minimum font scaling that may be applied, e.g. 0.5 times assigned font size.

setMaxFontScale

public void setMaxFontScale(float f)

Sets the maximum font scaling that may be applied, e.g. 3 times assigned font size. Calling incrementFontSize() after this scale has been reached doesn't have an effect.

setMinFontScale

public void setMinFontScale(float f)

Sets the minimum font scaling that may be applied, e.g. 3 times assigned font size. Calling decrementFontSize() after this scale has been reached doesn't have an effect.