Eclipse Community Forums: Riena » TreeTableRidget: Bind model to modifiable value

Home » Archived » Riena » TreeTableRidget: Bind model to modifiable value

TreeTableRidget: Bind model to modifiable value [message #538670]

Tue, 08 June 2010 07:40

Eclipse User

Hi,

i need to bind a TreeTableRidget to a global modifiable value. So far changes on that value doesn't force a change in the TreeTable automatically. Only if reassign the binding after the value has changed, the TreeTable displays the new value.

Isn't there a way to bind the TreeTableRidget to an modifiable value like e.g. ITableRidget.bindToModel(IObservableList, ...)?

thanks, matthias

Re: TreeTableRidget: Bind model to modifiable value [message #538683 is a reply to message #538670]

Tue, 08 June 2010 08:14

Eclipse User

Am 08.06.10 13:40, schrieb Matthias:
> Hi,
>
> i need to bind a TreeTableRidget to a global modifiable value. So far
> changes on that value doesn't force a change in the TreeTable
> automatically. Only if reassign the binding after the value has changed,
> the TreeTable displays the new value.
> Isn't there a way to bind the TreeTableRidget to an modifiable value
> like e.g. ITableRidget.bindToModel(IObservableList, ...)?
>
> thanks, matthias
>
In general in Riena changes in the model are only promoted to the widget either when you bind or by invoking the method
updateFromModel on the ridget. Its the same for all ridgets and its also true for the TreeTableRidget.

So when you finished updating the model, call updateFromModel on the ridget and that should be it.

christian

Re: TreeTableRidget: Bind model to modifiable value [message #538707 is a reply to message #538683]

Tue, 08 June 2010 09:11

Eclipse User

then i did something wrong with the binding:

input = createInput();
tree.bindToModel(input, MyTreeNode.class, MyTreeNode.PROPERTY_CHILDREN, MyTreeNode.PROPERTY_PARENT, columnPropertyNames, columnHeaders);

The thing is that createInput() creates a new array of TreeNodes out of my model structure. And because this new array has another id, it can't be bound. Am i right?

Re: TreeTableRidget: Bind model to modifiable value [message #538877 is a reply to message #538707]

Tue, 08 June 2010 17:01

Eclipse User

Hi Matthias,

I don't really understand your question... I think it would be best to post a standalone snippet showing your problem. Or at least an exception or error message.

Thanks,
Elias.

Re: TreeTableRidget: Bind model to modifiable value [message #538935 is a reply to message #538877]

Wed, 09 June 2010 03:15

Eclipse User

ok, i extended the SnippetTreeTableRidget001

with the function

private WordNode[] createTreeInput2() {
	WordNode root = new WordNode("Words");
	WordNode aTowns = new WordNode(root, "Z");
	new WordNode(aTowns, "Zurich"); //$NON-NLS-1$
	return new WordNode[] { root };
}

and the possibility to update the model

Button button = new Button(shell, SWT.PUSH);
button.setText("Update Value");
IActionRidget actionRidget = (IActionRidget) SwtRidgetFactory.createRidget(button);
actionRidget.addListener(new IActionListener() {
	public void callback() {
		roots = createTreeInput2();
	}
});

If i press the button, the TableTree doesn't change, even when i call updateFromModel() manually.
In my understanding it doesn't work since the model isn't modified but recreated.

I don't know how to update the model (Object[]) without recreating it.

I hope that was clear Wink

Re: TreeTableRidget: Bind model to modifiable value [message #539663 is a reply to message #538935]

Fri, 11 June 2010 14:16

Eclipse User

Hi Matthias,

sorry, you can't to that this way... The ridget does not keep the array reference (bad style - breaks encapsulation) only the values in the array. So changing the array after you invoke bindToModel(...) has no effect.

You can either invoke r.bindToModel(...); r.updateFromModel() or better:

1. Invoke ridget.setRootsVisible(false)
2. The root you bind to should be a dummy node that returns the real roots as it's children
3. Change the values returned by the getChildren method of the root >> children are updated. No re-binding or update needed.

Hope this helps. If you need a snippet let me know.

Elias.

Re: TreeTableRidget: Bind model to modifiable value [message #539952 is a reply to message #539663]

Mon, 14 June 2010 07:40

Eclipse User

Meanwhile i came to the same solution. I work with ExtendedTreeNodes which holds a reference to my value object. In a PropertyChangeListener i call:

public void propertyChange(PropertyChangeEvent evt) {
		updateRoot((ExtendedTreeNode) input[0]);
		tree.updateFromModel();
}

private void updateRoot(ExtendedTreeNode rootNode){
		MyVal mv = ValueManager.getInstance().getValue();
		rootNode.setReference(mv);
}

this works, thanks

Re: TreeTableRidget: Bind model to modifiable value [message #585739 is a reply to message #538683]

Tue, 08 June 2010 09:11

Eclipse User

then i did something wrong with the binding:

input = createInput();
tree.bindToModel(input, MyTreeNode.class, MyTreeNode.PROPERTY_CHILDREN, MyTreeNode.PROPERTY_PARENT, columnPropertyNames, columnHeaders);

The thing is that createInput() creates a new array of TreeNodes out of my model structure. And because this new array has another id, it can't be bound. Am i right?

Re: TreeTableRidget: Bind model to modifiable value [message #585745 is a reply to message #538707]

Tue, 08 June 2010 17:01

Eclipse User

Hi Matthias,

I don't really understand your question... I think it would be best to post a standalone snippet showing your problem. Or at least an exception or error message.

Thanks,
Elias.
--
Elias Volanakis | http://eclipsesource.com
elias (AT) eclipsesource.com | @evolanakis

Re: TreeTableRidget: Bind model to modifiable value [message #585753 is a reply to message #585745]

Wed, 09 June 2010 03:15

Eclipse User

ok, i extended the http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.riena/o rg.eclipse.riena.sample.snippets/src/org/eclipse/riena/sampl e/snippets/SnippetTreeTableRidget001.java?root=RT_Project&am p;view=co

with the function

private WordNode[] createTreeInput2() {
WordNode root = new WordNode("Words");
WordNode aTowns = new WordNode(root, "Z");
new WordNode(aTowns, "Zurich"); //$NON-NLS-1$
return new WordNode[] { root };
}

and the possibility to update the model

Button button = new Button(shell, SWT.PUSH);
button.setText("Update Value");
IActionRidget actionRidget = (IActionRidget) SwtRidgetFactory.createRidget(button);
actionRidget.addListener(new IActionListener() {
public void callback() {
roots = createTreeInput2();
}
});

If i press the button, the TableTree doesn't change, even when i call updateFromModel() manually.
In my understanding it doesn't work since the model isn't modified but recreated.

I don't know how to update the model (Object[]) without recreating it.

I hope that was clear ;)

Re: TreeTableRidget: Bind model to modifiable value [message #585808 is a reply to message #585753]

Fri, 11 June 2010 14:16

Eclipse User

Re: TreeTableRidget: Bind model to modifiable value [message #585835 is a reply to message #585808]

Mon, 14 June 2010 07:40

Eclipse User

Meanwhile i came to the same solution. I work with ExtendedTreeNodes which holds a reference to my value object. In a PropertyChangeListener i call:

public void propertyChange(PropertyChangeEvent evt) {
updateRoot((ExtendedTreeNode) input[0]);
tree.updateFromModel();
}

private void updateRoot(ExtendedTreeNode rootNode){
MyVal mv = ValueManager.getInstance().getValue();
rootNode.setReference(mv);
}

this works, thanks

Previous Topic:	Data Communication failes - sometimes
Next Topic:	Possible problem on MacOSX Cocoa

Goto Forum:

-=] Back to Top [=-

Current Time: Thu Jul 03 05:57:57 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter