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How to embed more than a document?

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Dennis Schetinin

How to embed more than a document?

It seems to be basics of Pier, but I still don't understand them. If I have my own PRCase child with custom viewComponentClass, can I embed (using ++) it in another page, rendered the same way as at it's original position?

For instance, I have a Questionnaire and QuestionnaireView, which renders (it's children) Polls using Vote command. How can I show this at the main page of my site? Or how to do this some other (proper) way?

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Dennis Schetinin

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Damien Cassou-3

Re: How to embed more than a document?

Hi Dennis,

On Tue, Jul 7, 2009 at 7:25 PM, Dennis Schetinin<[hidden email]> wrote:
> It seems to be basics of Pier, but I still don't understand them. If I have
> my own PRCase child with custom viewComponentClass, can I embed (using ++)
> it in another page, rendered the same way as at it's original position?
>
> For instance, I have a Questionnaire and QuestionnaireView, which renders
> (it's children) Polls using Vote command. How can I show this at the main
> page of my site? Or how to do this some other (proper) way?

I'm not sure but I would try:

1) Implement a method #accept: in Questionnaire

Questionnaire>>accept: aVisitor
aVisitor visitQuestionnaire: self

2) Implement PRVisitor>>visitQuestionnaire:

PRVisitor>>visitQuestionnaire: aQuestionnaire
self visitCase: aQuestionnaire

3) Implement PREmbeddedRender>>visitQuestionnaire:

PREmbeddedRender>>visitQuestionnaire: aQuestionnaire
"do whatever you want with the 'html' instance variable and
'aQuestionnaire' questionnaire"
...
--
Damien Cassou
http://damiencassou.seasidehosting.st

"Lambdas are relegated to relative obscurity until Java makes them
popular by not having them." James Iry
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Dennis Schetinin

Re: How to embed more than a document?

> For instance, I have a Questionnaire and QuestionnaireView, which renders
> (it's children) Polls using Vote command. How can I show this at the main
> page of my site? Or how to do this some other (proper) way?

I'm not sure but I would try:

1) Implement a method #accept: in Questionnaire

Questionnaire>>accept: aVisitor
aVisitor visitQuestionnaire: self

2) Implement PRVisitor>>visitQuestionnaire:

PRVisitor>>visitQuestionnaire: aQuestionnaire
self visitCase: aQuestionnaire

3) Implement PREmbeddedRender>>visitQuestionnaire:

PREmbeddedRender>>visitQuestionnaire: aQuestionnaire
"do whatever you want with the 'html' instance variable and
'aQuestionnaire' questionnaire"
...

Nice instructions, thank you. I'll try it this way

--
Dennis Schetinin

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Magritte, Pier and Related Tools ...
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Dennis Schetinin

Re: How to embed more than a document?

In reply to this post by Damien Cassou-3

> For instance, I have a Questionnaire and QuestionnaireView, which renders
> (it's children) Polls using Vote command. How can I show this at the main
> page of my site? Or how to do this some other (proper) way?

I'm not sure but I would try:

1) Implement a method #accept: in Questionnaire

Questionnaire>>accept: aVisitor
aVisitor visitQuestionnaire: self

2) Implement PRVisitor>>visitQuestionnaire:

PRVisitor>>visitQuestionnaire: aQuestionnaire
self visitCase: aQuestionnaire

3) Implement PREmbeddedRender>>visitQuestionnaire:

PREmbeddedRender>>visitQuestionnaire: aQuestionnaire
"do whatever you want with the 'html' instance variable and
'aQuestionnaire' questionnaire"

Wouldn't it be a hack to implement it this way?

    PREmbeddedRenderer >> visitQuestionnaire: aStructure
        (aStructure viewComponentClass on: self context)
            structure: aStructure;
        renderContentOn: html

Specifically I'm not sure about #structure: setter for QuestionnaireView... I had to do the following there:

    QuestionnaireView >>

        renderContentOn: html
    self components do: [:each |
           html render: each]

        components
      | pollStructure pollCommand pollComponent |
      ^ self polls
    collect: [:each |
        pollStructure := self context structure: each command: POVoteCommand new.
              pollCommand := pollStructure command.
              pollComponent := pollCommand description asComponentOn: pollCommand.
              "..."
            pollComponent]

        polls
    ^ self structure childrenDecoration children

        structure
          ^ structure ifNil: [self context structure]

It works so far but I doubt it's a correct away... Though I can't explain/understand why...

--
Dennis Schetinin

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Dennis Schetinin

Re: How to embed more than a document?

Wouldn't it be a hack to implement it this way?

    PREmbeddedRenderer >> visitQuestionnaire: aStructure
        (aStructure viewComponentClass on: self context)
            structure: aStructure;
        renderContentOn: html

Specifically I'm not sure about #structure: setter for QuestionnaireView... I had to do the following there:

    QuestionnaireView >>

        renderContentOn: html
    self components do: [:each |
           html render: each]

        components
      | pollStructure pollCommand pollComponent |
      ^ self polls
    collect: [:each |
        pollStructure := self context structure: each command: POVoteCommand new.
              pollCommand := pollStructure command.
              pollComponent := pollCommand description asComponentOn: pollCommand.
              "..."
            pollComponent]

        polls
    ^ self structure childrenDecoration children

        structure
          ^ structure ifNil: [self context structure]

It works so far but I doubt it's a correct away... Though I can't explain/understand why...

One (not the only?) problem is "WAComponentsNotFoundError" while posting the form. It's because #children method of QuestionnaireView is not invoked at all... Any suggestions? Shouldn't I create a special PRWidget for this case? Or go some other way?

--
Dennis Schetinin

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