The distinction is that:
value="${foo}"
evauates the expression foo, converts it to a string, and binds the
value parameter to the string (read only).
value="foo"
binds the value parameter to the expression foo, which is read/write
(assuming there's a setFoo() method).
You can use "${foo}" almost anywhere, including an attribute of
non-component elements. You can only use value="foo" to bind
component parameters.
On Tue, Jan 6, 2009 at 9:38 AM, Tobias Wehrum <leg...@dragonlab.de> wrote:
> Indeed it should. I didn't check all the code I copied.
>
> If you use an expansion ${color}, just the value of the property color gets
> inserted there and Tapestry doesn't has access to the property color. This
> was the first error reported in this thread.
>
> Jayson Pierringer schrieb:
>>
>> I haven't ever seen anything like value="${teste}" in the tml either. I
>> think that should just be value="teste". You used the @Property attribute
>> in your java page so tapestry will magically create your getter and setter.
>> Tapestry will then use that getter and setter for the value.
>>
>> For a good example of how to use checkboxes and radio buttons take a look
>> at this page example:
>>
>> http://jumpstart.doublenegative.com.au:8080/jumpstart/examples/component/coreinputcomponents
>>
>> Jayson
>>
>> Tobias Wehrum wrote:
>>>
>>> Hello,
>>>
>>> while I've never worked with the Radio Component before, I assume from
>>> the URL I provided to you that it should look like this:
>>>
>>> Class:
>>> -----------------------------------
>>> [...]
>>> @Property
>>> private String currentColor;
>>>
>>> @Property
>>> private String chosenColor;
>>> [...]
>>> void onSubmit() {
>>> System.out.println("aqui.........: " + chosenColor);
>>> }
>>> [...]
>>> -----------------------------------
>>>
>>> Template:
>>> -----------------------------------
>>> <form t:type="form" t:id="myForm">
>>> <input t:type="submit" t:name="${teste}" value="${teste}"/> ${teste}
>>> <br/>
>>>
>>> <t:radiogroup value="chosenColor">
>>> <t:loop source="colors" value="currentColor">
>>> <t:radio value="currentColor"/> ${currentColor}
>>> </t:loop>
>>> </t:radiogroup>
>>>
>>> <br/>
>>> <input t:type="submit"/>
>>> </form>
>>> -----------------------------------
>>>
>>> Code is untested and maybe needs to be tweaked a bit.
>>>
>>> - Tobias
>>>
>>>
>>> Gutemberg A. Da Silva schrieb:
>>>>
>>>> Ok guys, so
>>>>
>>>> --> my Class Code
>>>>
>>>> public class CheckBoxClass {
>>>>
>>>> @Property
>>>> private String teste = "teste";
>>>>
>>>> @Property
>>>> private final String[] colors = { "Blue", "Red", "Green" };
>>>>
>>>> @Property
>>>> private String color;
>>>>
>>>> @Property
>>>> private boolean color1 = false;
>>>>
>>>> public void setColor1() {
>>>> this.color1 = true;
>>>> }
>>>>
>>>> void onSubmit() {
>>>> System.out.println("aqui.........: " + color);
>>>> }
>>>>
>>>> }
>>>>
>>>>
>>>> --> my TML Code
>>>>
>>>> <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
>>>> <head>
>>>> <title>agenda Start Page</title>
>>>> </head>
>>>>
>>>> <body>
>>>> <form t:type="form" t:id="myForm">
>>>> <input t:type="submit" t:name="${teste}" value="${teste}"/>
>>>> ${teste}
>>>> <br/>
>>>> <t:loop source="colors" value="color">
>>>> <t:checkbox name="color1" value="color1"/> ${color}
>>>>
>>>> </t:loop>
>>>> <br/>
>>>> <input t:type="submit"/>
>>>> </form>
>>>> </body>
>>>>
>>>> </html>
>>>>
>>>> I have three items: Blue, Green and Red.
>>>> So I want to print the value of "Colors" by selected item.
>>>> I need simple example.
>>>>
>>>> 2009/1/6 Tobias Wehrum <leg...@dragonlab.de>
>>>>
>>>>
>>>>>
>>>>> Hello,
>>>>>
>>>>> I'm not seeing where you are using the Radio Component?
>>>>>
>>>>> I suggest you take a look at
>>>>>
>>>>>
>>>>> http://tapestry.apache.org/tapestry5/tapestry-core/ref/org/apache/tapestry5/corelib/components/Radio.html
>>>>> and combine it with your loop.
>>>>>
>>>>> Hope that helped,
>>>>> Tobias
>>>>>
>>>>>
>>>>> Gutemberg A. Da Silva schrieb:
>>>>>
>>>>>
>>>>> Hi guys,
>>>>>
>>>>>>
>>>>>> I have a problem with "RadioButton Component". I have this class:
>>>>>>
>>>>>> <!-- Class -->
>>>>>> public class CheckBoxClass {
>>>>>>
>>>>>> @Property
>>>>>> private final String[] colors = { "Blue", "Red", "Green" };
>>>>>>
>>>>>> @Property
>>>>>> private String color;
>>>>>>
>>>>>> @Property
>>>>>> private String teste;
>>>>>>
>>>>>> @Property
>>>>>> private boolean color1 = false;
>>>>>>
>>>>>> //@BeginRender
>>>>>> void onPrepare(String id) {
>>>>>> //color1 = true;
>>>>>>
>>>>>> if (color1) {
>>>>>> System.out.println("verdade..: " + id);
>>>>>> } else {
>>>>>> System.out.println("falso..: " + id);
>>>>>> }
>>>>>> }
>>>>>>
>>>>>> void onActivate(String id) {
>>>>>> System.out.println("++++++++++++++++ " + id);
>>>>>> }
>>>>>>
>>>>>> }
>>>>>>
>>>>>>
>>>>>> and have this TML:
>>>>>>
>>>>>> <!-- TML -->
>>>>>> <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
>>>>>>
>>>>>> <head>
>>>>>> <title>agenda Start Page</title>
>>>>>> </head>
>>>>>>
>>>>>> <body>
>>>>>> <form t:type="form" t:id="myForm">
>>>>>> <table>
>>>>>> <tr t:type="loop" source="colors" value="color" >
>>>>>> <td>
>>>>>> <t:checkbox
>>>>>> controller="colorController"
>>>>>> value="${color1}" context="${color}"/> ${color}
>>>>>> </td>
>>>>>> </tr>
>>>>>> <br/>
>>>>>> <input t:type="submit"/>
>>>>>> </table>
>>>>>> </form>
>>>>>> </body>
>>>>>>
>>>>>> </html>
>>>>>>
>>>>>> when I click on Submit, it is shownd this error:
>>>>>>
>>>>>> Failure writing parameter 'value' of component CheckBoxClass:checkbox:
>>>>>> Binding
>>>>>>
>>>>>> org.apache.tapestry5.internal.services.attributeexpansionbind...@1f68272is
>>>>>> read-only.
>>>>>> context
>>>>>> eventTypeaction
>>>>>> Can somebody help me in this Class Test with the "RadioButton"
>>>>>> component?
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
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>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
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>>>
>>>
>>
>>
>>
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>
>
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>
--
Howard M. Lewis Ship
Creator Apache Tapestry and Apache HiveMind
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