GWT 2.0.3 + Tree widget + get tree level of selected TreeItem - Problem
Hejsan,
I am building dynamic Tree Widget. First Level I done with no problem
so it look like:
+ Atletics
+ Ice Hockey
+ Chess
+ Footbal
+ Golf
Functionality must be like when you click on sport must roll up/show
off list of countries like:
+ Atletics
+ Ice Hockey
+ Canada
+ USA
+ Russia
+ Chess
+ Footbal
+ Golf
and when click to some country then show off League like
+ Atletics
+ Ice Hockey
+ Canada
+ Tournaments
+ Extra league
+ 1.league
+ 2.league
+ USA
+ Russia
+ Chess
+ Footbal
+ Golf
PROBLEM is that I need get level of selected TreeItem to for each
different level will fire up different query so for example for
selected Ice Hockey need get information that it's 1 level of tree so
use databases select to find out all countries for Ice hockey.
When click to Canada TreeItem, it's level 2 I call select to find
out all leagues level for Canada.
I create handler for Tree like:
// Add a handler that automatically generates some children
statTree.addOpenHandler(new OpenHandlerTreeItem() {
public void onOpen(OpenEventTreeItem event) {
// tree item that was clicked
TreeItem itemSelected = event.getTarget();
if (itemSelected.getChildCount() == 1) {
// Close item immediately
itemSelected.setState(false, false);
// Add a random number of children to
the item
String itemText =
itemSelected.getText();
// request to database according
selected tree item level
// dummy data
for (int i = 0; i numChildren; i++) {
// tree item to be added
TreeItem childDescendant =
itemSelected
.addItem(itemText + . + i);
System.out.println(\ncildDescendant index:
+
itemSelected.getChildIndex(childDescendant));
childDescendant.addItem();
}
// Remove the temporary item when we
finish loading
itemSelected.getChild(0).remove();
// Reopen the item
itemSelected.setState(true, false);
}
}
});
Please help me some one I'll do appreciate it.
Thank you
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GWT 2.0.3 + Tree widget + get tree level of selected TreeItem - Problem
Hejsan
I am building GWT Tree and need to get information about level of
current opened TreeItem. Let me describe more detail.
I build up first level(Sport List) of tree so it looks like:
+ Athletics
+ Ice Hockey
+ Footbal
Second level(Countries List) must looks like:
+ Athletics
+ Ice Hockey
+ Canada
+ USA
+ Russia
+ Footbal
Third level(League List) must looks like:
+ Athletics
+ Ice Hockey
+ Canada
+ Tournament
+ 1.League
+ 2.League
+ AAA League
+ USA
+ Russia
+ Footbal
Why I need info abou opened TreeItem? By level of opened TreeItem fire
up different SELECT of database so if I open up + Ice Hockey - it's
first level, then I fire up SELECT on database to get list of
countries for sport Ice Hockey. Next if I open up country + Canada
then fire up SELECT on databases to get list of all leagues at country
Canada for sport Ice Hockey.
I call open handler for Tree for TreeItem like this:
// Add a handler that automatically generates some children
statTree.addOpenHandler(new OpenHandlerTreeItem() {
public void onOpen(OpenEventTreeItem event) {
// tree item that was clicked
TreeItem itemSelected = event.getTarget();
if (itemSelected.getChildCount() == 1) {
// Close item immediately
itemSelected.setState(false, false);
// Add a random number of children to
the item
String itemText =
itemSelected.getText();
// different request to database,
according level of TreeItem
// ??
// just temporary dummy data
of subtree items
int numChildren = Random.nextInt(5) + 2;
for (int i = 0; i numChildren; i++) {
// tree item to be added
TreeItem childDescendant =
itemSelected
.addItem(itemText + . + i);
System.out.println(\ncildDescendant index:
+
itemSelected.getChildIndex(childDescendant));
childDescendant.addItem();
}
// Remove the temporary item when we
finish loading
itemSelected.getChild(0).remove();
// Reopen the item
itemSelected.setState(true, false);
}
}
});
Please help me with this problem, I'd appreciate it.
junior
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Re: GWT 2.0.3 + Tree widget + get tree level of selected TreeItem - Problem
Follow the chain of getParentItem() until it returns null.
http://google-web-toolkit.googlecode.com/svn/javadoc/2.1/com/google/gwt/user/client/ui/TreeItem.html#getParentItem()
On Jun 2, 3:25 am, junior kubinca...@gmail.com wrote:
Hejsan
I am building GWT Tree and need to get information about level of
current opened TreeItem. Let me describe more detail.
I build up first level(Sport List) of tree so it looks like:
+ Athletics
+ Ice Hockey
+ Footbal
Second level(Countries List) must looks like:
+ Athletics
+ Ice Hockey
+ Canada
+ USA
+ Russia
+ Footbal
Third level(League List) must looks like:
+ Athletics
+ Ice Hockey
+ Canada
+ Tournament
+ 1.League
+ 2.League
+ AAA League
+ USA
+ Russia
+ Footbal
Why I need info abou opened TreeItem? By level of opened TreeItem fire
up different SELECT of database so if I open up + Ice Hockey - it's
first level, then I fire up SELECT on database to get list of
countries for sport Ice Hockey. Next if I open up country + Canada
then fire up SELECT on databases to get list of all leagues at country
Canada for sport Ice Hockey.
I call open handler for Tree for TreeItem like this:
// Add a handler that automatically generates some children
statTree.addOpenHandler(new OpenHandlerTreeItem() {
public void onOpen(OpenEventTreeItem event) {
// tree item that was clicked
TreeItem itemSelected = event.getTarget();
if (itemSelected.getChildCount() == 1) {
// Close item immediately
itemSelected.setState(false, false);
// Add a random number of children to
the item
String itemText =
itemSelected.getText();
// different request to database,
according level of TreeItem
// ??
// just temporary dummy data
of subtree items
int numChildren = Random.nextInt(5) +
2;
for (int i = 0; i numChildren; i++)
{
// tree item to be added
TreeItem childDescendant =
itemSelected
.addItem(itemText + . + i);
System.out.println(\ncildDescendant index:
+
itemSelected.getChildIndex(childDescendant));
childDescendant.addItem();
}
// Remove the temporary item when we
finish loading
itemSelected.getChild(0).remove();
// Reopen the item
itemSelected.setState(true, false);
}
}
});
Please help me with this problem, I'd appreciate it.
junior
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