event interception on Text

[mathieu.cier]

hi,

I try to redefine the onkeyPress event onto a Text component for
intercepting the keyCode #13 (i.e. for default action when validating
a text zone).
for this I've implemented an event handler onto the txtObjName object as:


txtObjName.keypresshandler.onkeyPress = function () {
        var keyCode = oThis.txtObjName.keypresshandler.getKeyCode();
        if (keyCode != 13) {
                //default rialto behaviour
                this.prototype.baseOnkeyPress =
rialto.widget.Text.prototype.keypresshandler.onkeyPress;
                oThis.baseOnkeyPress();
        }
        else
                //my statements
                ...
}

but then I get the error message:
rialto.widget.Text.prototype.keypresshandler has no properties

and I can't call the herited handler...
what the good syntax please for doing this?
thx

mathieu

[Cyril Balit]

Hello mathieu,

It was almost ok. In fact you don't have to change keypressHandler
attribute. As the keypresHandler use the onkeyPress function of the
Text widget just redefine it. This function must return a bolean to
allow or cancel the keypress

Here is an example

var myText = new rialto.widget.Text('Text',20,250,350,'A',document.body);
myText.baseOnkeyPress=rialto.widget.Text.prototype.checkKeyPress;
myText.checkKeyPress=function(){
var keyCode = this.keypresshandler.getKeyCode();
if (keyCode != 13) {
//default rialto behaviour
return this.baseOnkeyPress();
}
else
//my statements return true or false
}

}

Cyril



--- In rialto-dev@..., "mathieu.cier" <mathieu.cier@...>
wrote:
>
> hi,
>
> I try to redefine the onkeyPress event onto a Text component for
> intercepting the keyCode #13 (i.e. for default action when validating
> a text zone).
> for this I've implemented an event handler onto the txtObjName
object as:

>
>
> txtObjName.keypresshandler.onkeyPress = function () {
> var keyCode = oThis.txtObjName.keypresshandler.getKeyCode();
> if (keyCode != 13) {
>                 //default rialto behaviour
> this.prototype.baseOnkeyPress =
> rialto.widget.Text.prototype.keypresshandler.onkeyPress;
> oThis.baseOnkeyPress();
> }
> else
> //my statements
>                 ...
> }
>
> but then I get the error message:
> rialto.widget.Text.prototype.keypresshandler has no properties
>
> and I can't call the herited handler...
> what the good syntax please for doing this?
> thx
>
> mathieu
>

[mathieu.cier]

ok thanks a lot. it works fine.
mathieu

--- In rialto-dev@..., "Cyril Balit" <cbalit@...> wrote:

>
> Hello mathieu,
>
> It was almost ok. In fact you don't have to change keypressHandler
> attribute. As the keypresHandler use the onkeyPress function of the
> Text widget just redefine it. This function must return a bolean to
> allow or cancel the keypress
>
> Here is an example
>
> var myText = new

rialto.widget.Text('Text',20,250,350,'A',document.body);

> myText.baseOnkeyPress=rialto.widget.Text.prototype.checkKeyPress;
> myText.checkKeyPress=function(){
> var keyCode = this.keypresshandler.getKeyCode();
> if (keyCode != 13) {
> //default rialto behaviour
> return this.baseOnkeyPress();
> }
> else
> //my statements return true or false
> }
>
> }
>
> Cyril
>
>
>
> --- In rialto-dev@..., "mathieu.cier" <mathieu.cier@>
> wrote:
> >
> > hi,
> >
> > I try to redefine the onkeyPress event onto a Text component for
> > intercepting the keyCode #13 (i.e. for default action when validating
> > a text zone).
> > for this I've implemented an event handler onto the txtObjName
> object as:
> >
> >
> > txtObjName.keypresshandler.onkeyPress = function () {
> > var keyCode = oThis.txtObjName.keypresshandler.getKeyCode();
> > if (keyCode != 13) {
> >                 //default rialto behaviour
> > this.prototype.baseOnkeyPress =
> > rialto.widget.Text.prototype.keypresshandler.onkeyPress;
> > oThis.baseOnkeyPress();
> > }
> > else
> > //my statements
> >                 ...
> > }
> >
> > but then I get the error message:
> > rialto.widget.Text.prototype.keypresshandler has no properties
> >
> > and I can't call the herited handler...
> > what the good syntax please for doing this?
> > thx
> >
> > mathieu
> >
>