Package net.ontopia.topicmaps.nav2.utils

Class TreeWidget

java.lang.Object

net.ontopia.topicmaps.nav2.utils.TreeWidget

public class TreeWidget
extends Object

PUBLIC: This class can output a nice collapsing/expanding tree view of a topic map which uses tolog queries to produce the tree. The class is configurable in various ways, and can also be subclassed to further fine-tune the rendering.

Since:

2.1

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	TreeWidget.UniversalSet

Field Summary

Fields

Modifier and Type	Field	Description
protected Collection	ancestors
protected static final int	CLOSE
protected static final int	CLOSE_ALL
protected NavigatorPageIF	context
protected static final int	EXPAND_ALL
protected String	imageurl
protected Map	map
protected String	nodeFrame
protected String	nodepage
protected static final int	OPEN
protected Set	openNodes
protected String	ownpage
protected QueryProcessorIF	processor
protected ParsedQueryIF	query
protected String	staticurl
protected TopicMapIF	topicmap
protected String	topquery
protected static final int	WINDOW_SIZE
protected int	windowSize

Constructor Summary

Constructors

Constructor	Description
TreeWidget()	PUBLIC: Sets up the widget ready for use.
TreeWidget(TopicMapIF topicmap, String query, String topquery, String ownpage, String nodepage)	PUBLIC: Sets up the widget ready for use.

Method Summary

Modifier and Type	Method	Description
protected TopicTreeNode	buildTree()
protected void	endRender(Writer out)	PUBLIC: Called after the tree has been rendered.
protected QueryResultIF	getChildren(TopicIF topic)
protected String	getId(TopicIF topic)
protected TMObjectIF	getObjectById(String id)
protected TopicIF	getTopic(String id)
protected void	initializeContext(javax.servlet.http.HttpServletRequest request)
protected String	list(Set nodes)
protected String	makeNodeUrl(TopicTreeNode node)	PUBLIC: Produces the URL to the given node.
protected void	parseQueries()
protected void	process(TopicTreeNode parent)
protected void	renderAdditionalOnBottomExpandCloseLine(Writer out, int topline)	PUBLIC: Performs any additional rendering on the bottom line of the open-all and close-all buttons.
protected void	renderAdditionalOnTopExpandCloseLine(Writer out, int topline)	PUBLIC: Performs any additional rendering on the top line of the open-all and close-all buttons.
protected void	renderBackButton(Writer out, int topline)	PUBLIC: Renders the back button at the top/bottom of the form.
protected void	renderCloseAllButton(Writer out, int topline)	PUBLIC: Renders the close all button at the top/bottom of the form.
protected void	renderExpandAllButton(Writer out, int topline)	PUBLIC: Renders the expand all button at the top/bottom of the form.
protected void	renderForwardButton(Writer out, int topline)	PUBLIC: Renders the close all button at the top/bottom of the form.
protected void	renderNode(TopicTreeNode node, Writer out)	PUBLIC: This method renders the tree node, including its link, but not the button in front of the node.
protected void	renderNodeButton(int topline, int level, int action, String id, Writer out)	PUBLIC: Renders the +/- button in front of the node.
protected void	renderTree(TopicTreeNode node, int topline, Writer writer)
void	run(javax.servlet.http.HttpServletRequest request, Writer writer)	PUBLIC: Runs the widget, producing the output.
void	run(javax.servlet.jsp.PageContext ctxt, Writer writer)	PUBLIC: Runs the widget, producing the output.
void	setAddAnchor(boolean addAnchor)	PUBLIC: If set to true the widget will add anchors on all links that open/close nodes in the tree.
void	setImageUrl(String imageurl)	PUBLIC: The URL at which the graphics used by the widget are found.
void	setNodeFrame(String nodeFrame)	PUBLIC: The name of the HTML frame in which to open links to nodes.
void	setNodePageUrl(String nodePageUrl)	PUBLIC: The URL of of the page that shows the nodes.
void	setNodeQueryString(String nodeQuery)	PUBLIC: Sets the tolog query that given a node generates its children.
void	setOwnPageUrl(String ownPageUrl)	PUBLIC: The URL of the page the widget is on.
void	setTopicMap(TopicMapIF topicmap)	PUBLIC: Sets the topic map used by the widget.
void	setTopQueryString(String topQuery)	PUBLIC: Sets the tolog query that generates the list of top nodes.
void	setWidgetName(String name)	PUBLIC: The name of the session key in which the set of open nodes is stored.
void	setWindowSize(int windowSize)	PUBLIC: Sets the maximum number of nodes displayed by the widget at once.
protected void	startRender(Writer out)	PUBLIC: Called before rendering of the tree begins.
String	toString(TopicIF topic)
protected int	writeNode(TopicTreeNode node, int topline, Writer writer, int level, int lineno, boolean indoc)

Methods inherited from class java.lang.Object

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

Field Details

OPEN

protected static final int OPEN

See Also:

• Constant Field Values

CLOSE

protected static final int CLOSE

See Also:

• Constant Field Values

EXPAND_ALL

protected static final int EXPAND_ALL

See Also:

• Constant Field Values

CLOSE_ALL

protected static final int CLOSE_ALL

See Also:

• Constant Field Values

WINDOW_SIZE

protected static final int WINDOW_SIZE

See Also:

• Constant Field Values

processor

protected QueryProcessorIF processor

nodepage

protected String nodepage

staticurl

protected String staticurl

openNodes

protected Set openNodes

imageurl

protected String imageurl

windowSize

protected int windowSize

context

protected NavigatorPageIF context

ancestors

protected Collection ancestors

query

protected ParsedQueryIF query

topicmap

protected TopicMapIF topicmap

map

protected Map map

topquery

protected String topquery

ownpage

protected String ownpage

nodeFrame

protected String nodeFrame

Constructor Details

TreeWidget

public TreeWidget()

PUBLIC: Sets up the widget ready for use. The default constructor must be accompanied by the appropriate setter methods.

TreeWidget

public TreeWidget(TopicMapIF topicmap,
 String query,
 String topquery,
 String ownpage,
 String nodepage)

PUBLIC: Sets up the widget ready for use.

Parameters:

topicmap - The topic map being displayed.

query - A tolog query that given a node generates its children. Use the %parent% parameter to reference the parent node in the query. Make sure the query produces a 1-column result.

topquery - A tolog query that generates the list of top nodes. Make sure the query produces a 1-column result.

ownpage - The URL of the page the widget is on. The widget will append request parameters in the form "a=b&c=d&e=f..."

nodepage - The URL of of the page that shows the nodes.

Method Details

setTopicMap

public void setTopicMap(TopicMapIF topicmap)

PUBLIC: Sets the topic map used by the widget.

setWidgetName

public void setWidgetName(String name)

PUBLIC: The name of the session key in which the set of open nodes is stored. Using the same session key for different widgets will make them share open/closed information.

setTopQueryString

public void setTopQueryString(String topQuery)

PUBLIC: Sets the tolog query that generates the list of top nodes. Make sure the query produces a 1-column result.

setNodeQueryString

public void setNodeQueryString(String nodeQuery)

PUBLIC: Sets the tolog query that given a node generates its children. Use the %parent% parameter to reference the parent node in the query. Make sure the query produces a 1-column result.

setOwnPageUrl

public void setOwnPageUrl(String ownPageUrl)

PUBLIC: The URL of the page the widget is on. The widget will append request parameters in the form "a=b&c=d&e=f..."

setNodePageUrl

public void setNodePageUrl(String nodePageUrl)

PUBLIC: The URL of of the page that shows the nodes.

setImageUrl

public void setImageUrl(String imageurl)

PUBLIC: The URL at which the graphics used by the widget are found. The widget will produce HTML like <img src="[imageurl]spacer.gif"> to refer to the graphics.

setAddAnchor

public void setAddAnchor(boolean addAnchor)

PUBLIC: If set to true the widget will add anchors on all links that open/close nodes in the tree. The default is true.

setWindowSize

public void setWindowSize(int windowSize)

PUBLIC: Sets the maximum number of nodes displayed by the widget at once. If the number of nodes to display exceeds the maximum the widget will break the display into multiple "pages".

setNodeFrame

public void setNodeFrame(String nodeFrame)

PUBLIC: The name of the HTML frame in which to open links to nodes.

run

public void run(javax.servlet.jsp.PageContext ctxt,
 Writer writer)
         throws IOException,
InvalidQueryException,
NavigatorRuntimeException

PUBLIC: Runs the widget, producing the output.

Throws:

IOException

InvalidQueryException

NavigatorRuntimeException

run

public void run(javax.servlet.http.HttpServletRequest request,
 Writer writer)
         throws IOException,
InvalidQueryException,
NavigatorRuntimeException

PUBLIC: Runs the widget, producing the output.

Throws:

IOException

InvalidQueryException

NavigatorRuntimeException

Since:

2.2.1

parseQueries

protected void parseQueries()
                     throws InvalidQueryException

Throws:

InvalidQueryException

initializeContext

protected void initializeContext(javax.servlet.http.HttpServletRequest request)

buildTree

protected TopicTreeNode buildTree()
                           throws InvalidQueryException

Throws:

InvalidQueryException

getChildren

protected QueryResultIF getChildren(TopicIF topic)
                             throws InvalidQueryException

Throws:

InvalidQueryException

process

protected void process(TopicTreeNode parent)
                throws InvalidQueryException

Throws:

InvalidQueryException

renderTree

protected void renderTree(TopicTreeNode node,
 int topline,
 Writer writer)
                   throws IOException

Throws:

IOException

writeNode

protected int writeNode(TopicTreeNode node,
 int topline,
 Writer writer,
 int level,
 int lineno,
 boolean indoc)
                 throws IOException

Throws:

IOException

getId

protected String getId(TopicIF topic)

getObjectById

protected TMObjectIF getObjectById(String id)

getTopic

protected TopicIF getTopic(String id)

list

protected String list(Set nodes)

toString

public String toString(TopicIF topic)

renderNode

protected void renderNode(TopicTreeNode node,
 Writer out)
                   throws IOException

PUBLIC: This method renders the tree node, including its link, but not the button in front of the node. Intended to be overridden by applications wanting to control rendering of nodes in detail.

Throws:

IOException

renderNodeButton

protected void renderNodeButton(int topline,
 int level,
 int action,
 String id,
 Writer out)
                         throws IOException

PUBLIC: Renders the +/- button in front of the node. Intended to be overridden.

Throws:

IOException

renderBackButton

protected void renderBackButton(Writer out,
 int topline)
                         throws IOException

PUBLIC: Renders the back button at the top/bottom of the form.

Throws:

IOException

renderExpandAllButton

protected void renderExpandAllButton(Writer out,
 int topline)
                              throws IOException

PUBLIC: Renders the expand all button at the top/bottom of the form.

Throws:

IOException

renderCloseAllButton

protected void renderCloseAllButton(Writer out,
 int topline)
                             throws IOException

PUBLIC: Renders the close all button at the top/bottom of the form.

Throws:

IOException

renderForwardButton

protected void renderForwardButton(Writer out,
 int topline)
                            throws IOException

PUBLIC: Renders the close all button at the top/bottom of the form.

Throws:

IOException

renderAdditionalOnTopExpandCloseLine

protected void renderAdditionalOnTopExpandCloseLine(Writer out,
 int topline)
                                             throws IOException

PUBLIC: Performs any additional rendering on the top line of the open-all and close-all buttons. Intended to be implemented by any sub-classes that need to do such additional rendering.

Throws:

IOException

renderAdditionalOnBottomExpandCloseLine

protected void renderAdditionalOnBottomExpandCloseLine(Writer out,
 int topline)
                                                throws IOException

PUBLIC: Performs any additional rendering on the bottom line of the open-all and close-all buttons. Intended to be implemented by any sub-classes that need to do such additional rendering.

Throws:

IOException

startRender

protected void startRender(Writer out)
                    throws IOException

PUBLIC: Called before rendering of the tree begins.

Throws:

IOException

endRender

protected void endRender(Writer out)
                  throws IOException

PUBLIC: Called after the tree has been rendered.

Throws:

IOException

makeNodeUrl

protected String makeNodeUrl(TopicTreeNode node)

PUBLIC: Produces the URL to the given node.

Since:

3.0