Hi,
the method you want to override is the following:
protected void onNodeLinkClicked(Object node, BaseTree tree,
AjaxRequestTarget target)
{
}
Sven
On 05/18/2011 05:27 PM, hubert_hupe wrote:
Oh my goodness,
ok. there was an object that was null. error is gone.
BUT still no event is fired when i click on a node in the tree.
as a kind of template i tried to adapt the following for the tree:
add(new AjaxLink("expandAll") {
@Override
public void onClick(AjaxRequestTarget target) {
tree.getTreeState().expandAll();
tree.updateTree(target);
System.out.println("Click");
}
});
here is the current snippet:
add(new LinkTree("tree", createTreeModel()) {
protected void onNodeClicked(AjaxRequestTarget ajaxRequestTarget, TreeNode
node) {
System.out.println("Click");
}
});
the problem is that the line with "system.out" is never reached when i click
the tree node.
an @Override is not possible as in the AjaxLink onClik Method.
has anyone ever used
org.apache.wicket.markup.html.tree.LinkTree.LinkTree(String id, TreeModel model)
i got the exampe from here:
http://www.wicket-library.com/wicket-examples/ajax/tree/simple?0
but there is no sample to get the clicked node
cheers
Am 18.05.2011 um 15:28 schrieb Martijn Dashorst:
Take a look at line 217 of your SignIn class and see why it throws a NPE.
Martijn
On Wed, May 18, 2011 at 3:24 PM, hubert_hupe<hubert_h...@gmx.de> wrote:
hi sven,
here it is. cheers hubert
WicketMessage: Can't instantiate page using constructor public
com.reporting.SignIn(org.apache.wicket.PageParameters) and argument
Root cause:
java.lang.NullPointerException
at com.reporting.SignIn.<init>(SignIn.java:217)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at
org.apache.wicket.session.DefaultPageFactory.createPage(DefaultPageFactory.java:188)
at
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:65)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:298)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:320)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:234)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:319)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:295)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:503)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:827)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:511)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:210)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:379)
at
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
at
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
Complete stack:
org.apache.wicket.WicketRuntimeException: Can't instantiate page using
constructor public com.reporting.SignIn(org.apache.wicket.PageParameters) and
argument
at
org.apache.wicket.session.DefaultPageFactory.createPage(DefaultPageFactory.java:212)
at
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:65)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:298)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:320)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:234)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at
org.apache.wicket.session.DefaultPageFactory.createPage(DefaultPageFactory.java:188)
at
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:65)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:298)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:320)
at
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:234)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
Am 18.05.2011 um 14:59 schrieb Sven Meier:
Hi,
error: WicketMessage: Can't instantiate page using constructor
public com.test.Test(org.apache.wicket.PageParameters) and argument
an exception stacktrace would give us a clue on what goes wrong here.
Sven
Am 18.05.2011 11:44, schrieb hubert_hupe:
hello,
after hours of researching and trying get a simple tree running iam completely
frustrated.
i added a tree to the website in this way:
public class Test extends WebPage {
protected TreeModel createTreeModel() {
List<Object> l1 = new ArrayList<Object>();
l1.add("test 1.1");
....
}
public Test(final PageParameters parameters) {
tree = new LinkTree("tree", createTreeModel());
add(tree);
}
markup:
<div wicket:id="tree" class="my-tree"> </div>
now the problem: i am not able to fetch the selected node. iam not able to
fetch the event...
i tried the following:
add(new LinkTree("tree") {
public void onClick(AjaxRequestTarget target) {
System.out.println("Click");
}
});
error: WicketMessage: Can't instantiate page using constructor public
com.test.Test(org.apache.wicket.PageParameters) and argument
what works is: to get an event from a link:
add(new AjaxLink("expandAll") {
@Override
public void onClick(AjaxRequestTarget target) {
tree.getTreeState().expandAll();
tree.updateTree(target);
System.out.println("Click");
}
});
the same must be possible with the tree?!
any help is appreciated...
cheers hubert
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