java generated tree dosn't work...

asked 2006-05-07 15:24:21 +0800

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Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3717695

By: oberinspector

backround: in my db i have a entity and a entry table where the entry table is a n:m table between entities: entity 1:n entry n:1 entity this construct is used to build up hierarchical strucures in the db...

i have overwritten Treechildren and Treeitem, where treechildren handles the entry list and Treeitem corresponds with entity.

my Item implementation has a createChildren() to create the treechildren:

class EntiyTreeItem extends Treeitem {
...
public void createChildren(){
if(entity==null && entry != null)
entity = entry.getChild();
EntityTreeChildren treechildren = new EntityTreeChildren(entity, typeImage,
deepness);
this.appendChild(treechildren);
}

my Treechildren implementaion also to create treeitems for each entry in a loop:

class EntiyTreeChildren extends Treechildren { ...
public void createChildren(){
...
while(i.hasNext()){
...
EntityTreeItem item = new EntityTreeItem(entity.getChildEntries().get(key),
typeImage, deepness);
...
this.appendChild(item);
}

The tree is rendered as expected, but is not functional...
2 problems:
1. when i click on the +/- buttons they are toggled, but the children are not expanded/closed.
2. all generated treeitems have the +/- button, even when the have no children...

i tried a onOpen()function in EntityTreeItem and also tried to add an event listener to EntityTreeItem...

do i have to care for expand/close of children with an own onOpen event listener, when i overwrite Treeitem, Treechildren?