Package net.ontopia.topicmaps.nav2.utils

Class DynamicTreeWidget

java.lang.Object

net.ontopia.topicmaps.nav2.utils.DynamicTreeWidget

public class DynamicTreeWidget
extends Object

EXPERIMENTAL: This class can output a nice collapsing/expanding tree view of a topic map implemented with DHTML, 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:

3.0

Field Summary

Fields

Modifier and Type	Field	Description
protected static final int	CLOSE
protected static final int	CLOSE_ALL
protected NavigatorPageIF	context
protected static final int	EXPAND_ALL
protected String	imageurl
protected String	nodepage
protected static final int	OPEN
protected String	ownpage
protected QueryProcessorIF	processor
protected String	staticurl
protected static final int	WINDOW_SIZE
protected int	windowSize

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected void	endRender(Writer out)	PUBLIC: Called after the tree has been rendered.
protected String	escapeName(String name)
protected String	getId(TopicIF topic)
protected String	getQualifiedId(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	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.
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	setChildrenComparator(Comparator childrenComparator)
void	setDebug(boolean debug)	INTERNAL: Debug flag.
void	setDependentWidgets(String[] widget_names)	PUBLIC: The name of the session key in which the set of open nodes is stored.
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	setOwnPageUrl(String ownPageUrl)	PUBLIC: The URL of the page the widget is on.
void	setTableQuery(String tablequery)	EXPERIMENTAL: The name of the HTML frame in which to open links to nodes.
void	setTableQueryString(String tablequery)	PUBLIC: Sets the tolog query that generates the entire tree.
void	setTopicMap(TopicMapIF topicmap)	PUBLIC: Sets the topic map used by the widget.
void	setTopQuery(String topquery)
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)

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

imageurl

protected String imageurl

windowSize

protected int windowSize

context

protected NavigatorPageIF context

ownpage

protected String ownpage

Constructor Details

DynamicTreeWidget

public DynamicTreeWidget(TopicMapIF topicmap,
 String tablequery,
 String ownpage,
 String nodepage)
                  throws InvalidQueryException

PUBLIC: Sets up the widget ready for use.

Parameters:

topicmap - The topic map being displayed.

tablequery - A tolog query that generates the entire tree. The query must have at least two columns, where the first column contains all the parent nodes and the second column contains the children of those parents. Any further columns will be used to populate the data attribute of the tree nodes.

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.

Throws:

InvalidQueryException

DynamicTreeWidget

public DynamicTreeWidget()

PUBLIC: Sets up the widget ready for use.

Method Details

setTopicMap

public void setTopicMap(TopicMapIF topicmap)

PUBLIC: Sets the topic map used by the widget.

setTableQueryString

public void setTableQueryString(String tablequery)

PUBLIC: Sets the tolog query that generates the entire tree. The query must have at least two columns, where the first column contains all the parent nodes and the second column contains the children of those parents. Any further columns will be used to populate the data attribute of the tree nodes.

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.

setDebug

public void setDebug(boolean debug)

INTERNAL: Debug flag. Used only for debugging purposes.

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.

setDependentWidgets

public void setDependentWidgets(String[] widget_names)

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.

escapeName

protected String escapeName(String name)

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.

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

setTableQuery

public void setTableQuery(String tablequery)

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

Since:

2.0.3

setChildrenComparator

public void setChildrenComparator(Comparator childrenComparator)

setTopQuery

public void setTopQuery(String topquery)

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

initializeContext

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

getTopic

protected TopicIF getTopic(String id)

getId

protected String getId(TopicIF topic)

getQualifiedId

protected String getQualifiedId(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

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.