Re: [Gui4j-user] Casting objects in edit-fields

[Joachim S. <Joa...@be...>]

Hi Timo,

I'm not really sure what your suggestion is. The contentType attribute =
for
the combobox tells the framework the static type of the elements in the=

list, so that you can work with type information.

For the edit field, it is a little bit different, because at the end, y=
ou
will need a string which can be edited. So, there is no need to specifi=
y
the final type. On the other hand, which type should the contentType
attribute specify?

Maybe what you need, is a notation for class casts in the xml expressio=
n.
This could be integrated. However, instead of such a cast notation, so
could always use a method.

Here is an example, how I'm using the edit field to edit numbers. Maybe=

this helps you.

<edit value=3D"conv.double2strNK2(getCustomer.getWeight)"
setValue=3D"getCustomer.setWeight(conv.str2doubleNK2(?value))"/>

The controller then has to implement at least "conv" and "getCustomer".=
 The
result type of "getWeight" must match the argument type of "double2strN=
K2".

Regards,
Joachim
-----------------------------------------------------
Dr. Joachim Schmid
Beck et al. projects GmbH
Theresienh=F6he 13, D-80339 M=FCnchen
Phone:  +49 / 89 / 54 42 53 - 29
Mobile: +49 /163 / 54 42 529


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             "Timo Meinen"                                             =
    
             <me...@gm...>                                           =
    
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             31.01.2006 17:37          Joachim Schmid                  =
    
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                                       Re: [Gui4j-user] Casting objects=
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Hallo Jochen,

at first, thank you for the fastest maillinglist answer, I ever got. 3
Minutes, wow. ;-)

The conversion method won't help me:
My "Gui-Classes" extends a, let's call it Gui-Base-Class. Every GUI has=
 to
implement a method called getEditEntity, which is the editable entity i=
n
this view.
Of course, every GUI-class represents a different Entity, so the return=

type
of getEditEntity is different in every class.

I declared an abstract method getEditEntity in Gui-Base-Class, to verif=
y,
that every class provides this method. In deed, it is only a marker-met=
hod.

Perhaps I have to use generics to customize the return type. Never used=

generics, so far.

Could you imagine to add contentType-tag to edit-component and do a
gui4j-internal casting? Using comboBoxes this works wonderful. A new
Feature-Request. :-)

Thank you
Timo

--
Gl=FCck Auf
Timo

(MAIL) me...@gm...
(ICQ) 10201138
(AIM) TimoLiebtEffi
(JAB) tim...@ja...

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