Code for TreeTag class after putting it on a diet.
package org.apache.myfaces.custom.tree3;
import javax.faces.component.UIComponent;
public class TreeTag extends
org.apache.myfaces.custom.tree2.TreeTag {
private String expandAllInit = "false";
public static String EXPAND_ALL_INIT
= "org.apache.myfaces.tree.EXPAND_ALL_INIT";
private static String COMPONENT_TYPE
= "org.apache.myfaces.HtmlTree3";
public String getExpandAllInit() {
return expandAllInit;
}
public void setExpandAllInit(String expandAllInit) {
this.expandAllInit = expandAllInit;
}
public String getComponentType() {
return COMPONENT_TYPE;
}
protected void setProperties(UIComponent component)
{
super.setProperties(component);
// ideally, we would add a static var to JSFAttr
setBooleanProperty(component, EXPAND_ALL_INIT,
expandAllInit);
}
}
---- Original message ----
>Date: Tue, 12 Jul 2005 12:23:22 -0800
>From: [EMAIL PROTECTED]
>Subject: Re: extending tree2
>To: "MyFaces Discussion" <[email protected]>
>
> I figured out how to expand all nodes the first time
> tree2 is rendered. For those interested, below is
> the source of two java files and snippets from a tld
> and faces configuration file. Constructive
> criticism is appreciated.
>
> package org.apache.myfaces.custom.tree3;
>
> import javax.faces.context.FacesContext;
>
> import org.apache.myfaces.custom.tree2.TreeNode;
>
> import java.util.Iterator;
> import java.util.Map;
> import java.util.Set;
>
> /**
> * Child of tree2 UI component; this control will
> repect the
> * expandAllInit attribute.
> *
> */
> public class HtmlTree extends
> org.apache.myfaces.custom.tree2.HtmlTree{
>
> private boolean justCreated = true;
>
> public boolean isJustCreated() {
> return justCreated;
> }
>
> public void setJustCreated(boolean
> justCreated) {
> this.justCreated = justCreated;
> }
>
> // see superclass for documentation
> public void restoreState(FacesContext context,
> Object state)
> {
> this.setJustCreated(false);
> super.restoreState(context, state);
> }
>
> /**
> * Indicates whether or not the current [EMAIL PROTECTED]
> TreeNode} is expanded.
> *
> * if this is before a restoreState call, and
> the expandAllInit att. is set to true
> * and this is not a leaf, and the node is not
> expanded ... otherwise it will behave
> * as the parent would.
> *
> * @return boolean
> */
> public boolean isNodeExpanded()
> {
> boolean ret = super.isNodeExpanded();
>
> if(justCreated && getExpandAllInit() &&
> getNode().getChildCount() != 0 && ! ret){
> toggleExpanded();
> return true;
> }
> return ret;
> }
>
> /**
> * Iterates through the prop.s of the component,
> determines if all nodes are
> * expanded the first time they are rendered.
> *
> * @return boolean
> */
>
> protected boolean getExpandAllInit() {
> String key = null;
> Boolean value = null;
> Map map = null;
> Set set = null;
> Iterator iterator = null;
>
> map = getAttributes();
> iterator = map.keySet().iterator();
>
> while(iterator.hasNext()){
> key = (String)
> iterator.next();
>
> if(TreeTag.EXPAND_ALL_INIT.equals(key) ){
> value = (Boolean)
> map.get(key);
> return
> value.booleanValue();
> }
> }
>
> return false;
> }
>
> }
>
> package org.apache.myfaces.custom.tree3;
>
> import javax.faces.component.UIComponent;
> import javax.faces.context.FacesContext;
> import javax.faces.el.ValueBinding;
>
> import org.apache.myfaces.renderkit.JSFAttr;
>
> public class TreeTag extends
> org.apache.myfaces.custom.tree2.TreeTag {
>
> private String _value;
> private String _var;
> private String _varNodeToggler;
> private String _showLines;
> private String _showNav;
> private String _clientSideToggle;
> private String _showRootNode;
>
> private String expandAllInit = "false";
> public static String EXPAND_ALL_INIT =
> "org.apache.myfaces.tree.EXPAND_ALL_INIT";
>
> private static String COMPONENT_TYPE =
> "org.apache.myfaces.HtmlTree3";
>
> public String getExpandAllInit() {
> return expandAllInit;
> }
>
> public void setExpandAllInit(String
> expandAllInit) {
> this.expandAllInit = expandAllInit;
> }
>
> public String getComponentType() {
> return COMPONENT_TYPE;
> }
>
> public void setValue(String value)
> {
> _value = value;
> }
>
> /**
> * @param var The var to set.
> */
> public void setVar(String var)
> {
> _var = var;
> }
>
> public void setVarNodeToggler(String
> varNodeToggler)
> {
> _varNodeToggler = varNodeToggler;
> }
>
> public void setShowLines(String showLines)
> {
> _showLines = showLines;
> }
>
> public void setShowNav(String showNav)
> {
> _showNav = showNav;
> }
>
> public void setClientSideToggle(String
> clientSideToggle)
> {
> _clientSideToggle = clientSideToggle;
> }
>
> public void setShowRootNode(String showRootNode)
> {
> _showRootNode = showRootNode;
> }
>
> protected void setProperties(UIComponent
> component)
> {
> super.setProperties(component);
>
> FacesContext context =
> getFacesContext();
>
> if (_value != null)
> {
> ValueBinding vb =
> context.getApplication().createValueBinding(_value);
>
> component.setValueBinding("value", vb);
> }
>
> if (_var != null)
> {
>
> ((HtmlTree)component).setVar(_var);
> }
>
> if (_varNodeToggler != null)
> {
>
> ((HtmlTree)component).setVarNodeToggler(_varNodeToggler);
> }
>
> setBooleanProperty(component,
> JSFAttr.SHOW_NAV, _showNav);
> setBooleanProperty(component,
> JSFAttr.SHOW_LINES, _showLines);
> setBooleanProperty(component,
> JSFAttr.CLIENT_SIDE_TOGGLE, _clientSideToggle);
> setBooleanProperty(component,
> JSFAttr.SHOW_ROOT_NODE, _showRootNode);
> // ideally, we would add a static
> var to JSFAttr
> setBooleanProperty(component,
> EXPAND_ALL_INIT, expandAllInit);
> }
>
> }
>
> In your JSF config file:
>
> <component>
>
> <component-type>org.apache.myfaces.HtmlTree3</component-
type>
>
> <component-
class>org.apache.myfaces.custom.tree3.HtmlTree</component-
class>
> </component>
>
> In your TLD:
>
> <tag>
> <name>tree3</name>
>
> <tag-class>org.apache.myfaces.custom.tree3.TreeTag</tag-
class>
> <body-content>JSP</body-content>
>
> ... the same att.s you find in the tld
> extensions file for JSF 1.0.9
>
> <attribute>
> <description>Expand all nodes the
> initial time this control is rendered.</description>
>
> <name>expandAllInit</name>
> <required>false</required>
> <rtexprvalue>false</rtexprvalue>
> </attribute>
> </tag>
Dennis Byrne
