Martin Wittemann wrote:
>
> Hi Christian,
>
> I did take a look at your code but could not find the place where you
> use the bindValue method. So I could not see where the problem is and
> why the reset is called.
>
> I have to admit that I don't get completely why you need to do it the
> way you do it. What is targetObject and what is the targetPath?
>
Sorry if I have been unclear. qcl.config.Manager has has a "model"
property:
/*
* The config manager's data model which can be
* bound to a data store. It must be an qx.core.Object
* with two properties, "keys" and "values", which
* contain config keys and values, respectively and
* will be converted to qx.data.Array objects
*/
model :
{
check : "qx.core.Object",
nullable : true,
event : "changeModel",
apply : "_applyModel"
}
The model property is bound to a JsonRpc datastore's model property, so when
the datastore has finished loading, it's model property is transferred (in
fact, it is the same object, as you have designed the mechanism). It would,
for example, look like this (pseudo-code):
property 'model' : qx.core.Object
{
property 'keys' : qx.data.Array(["foo","bar","baz"]),
property 'properties' : qx.data.Arrray([1,2,3])
}
which corresponds to the configuration value map { foo:1,bar:2,baz:3 }.
So if I want to bind the value of a textfield tf to the value of the config
key "bar", I would do
qcl.config.Manager.getInstance().bindValue("bar",tf,"value",true);
Here is the bindValue method:
/**
* Binds a config value to a target widget property in both
* directions.
* @param key {String}
* @param targetObject {qx.core.Object}
* @param targetPath {String}
* @param updateSelfAlso {Boolean} Optional, default undefined
* @return
*/
bindValue : function( key, targetObject, targetPath, updateSelfAlso )
{
var index = this._getIndex( key );
/*
* update the target widget property when config value changes
*/
targetObject.bind( targetPath, this, "model.values[" + index + "]" );
/*
* update config value if target widget property changes
*/
if ( updateSelfAlso )
{
this.bind( "model.values[" + index + "]", targetObject, targetPath
);
}
}
So each time the config value changes (when loaded from the server or is set
manually), the value of tf changes. On the other hand, if the user changes
the value of tf, the config value is updated. Since the values are kept in a
qx.data.Array, internally, I have to bind tf.<value> to
qcl.config.Manager.getInstance().getModel().<values>[1].
So in my example, targetObjet is the textfield tf and targetPath is "value".
Does that make the case clear?
Thanks,
Christian
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