I didn't look at this too carefully, but I think you want to use a state.
<class name="survey">
<!-- ENUM 0: foo, 1: radio, 2: freeform, -->
<attribute name="type" type="number" value=
...
<state name="radios" apply="${ classroot.type == 1 }"
<radiogroup>
...
<state name="freeform" apply="${ classroot.type == 2 }"
<edittext/>
...
http://www.openlaszlo.org/lps-latest/docs/reference/state.html
You can data bind the type attribute (though watch out, it'll always be a
string (right, Tucker?)) like this:
<survey datapath="surveys/survey" type="$path{ 'question/@type' }">
A
On May 22, Mason Taube wrote:
> i'm writing the canonical survey app that everyone seems to write when they
> start with laszlo.
>
> the xml has a format like this:
>
> <surveys><survey><question><text>this is mult choice
> question</text><choices><choice>a</choice><choice>b</choice></choices></survey></surveys>
>
> it works well but we would like to support freeform text (and maybe other
> input types as well in the future).. we've added a 'type' on the question. if
> type is 2 i would like to use an edittext component instead of a radiogroup.
>
>
>
> <surveys><survey><question type='2'><text>this is a text only
> question</text></question></survey></surveys>
>
> what is the cleanest way of doing this in lzx?
>
>
>
> thanks
>
>
> code:
> <class name="surveydialog" extends="modaldialog"
> title="Survey"
> x="50"
> y="50" width="500" height="400">
> <attribute name="surveyNumber" value="1" type="string"/>
> <Beeper id="beeper"/>
> <view id="surveyView"
> datapath="${'surveyData:/surveys/survey['+parent.surveyNumber+']/question[1]'}">
> <method event="oninit">
> Debug.write(this.datapath.serialize());
> </method>
> <datapointer id="sDp"
> xpath="${'surveyData:/surveys/survey['+parent.parent.surveyNumber+']/question[1]'}">
>
> <method event="ondata">
> Debug.write(this.serialize());
> </method>
> </datapointer>
> <simplelayout/>
> <attribute name="questionId" value="$path{'@id'}"/>
> <text id="t" text="$path{'text/text()'}" resize="true"
> multiline='true' width='450'/>
> <radiogroup id="foo" name="votecombo"
> layout="class: simplelayout; axis: y; spacing:6"
> x="5" y="5" width="130"
> >
>
> <radiobutton datapath="choices/choice" text="$path{'text()'}"
> value="$path{'text()'}"
> selected="$path{'@selected'}">
> <attribute name="answerId" value="$path{'@id'}"/>
> <method event="onclick">
> var d=canvas.datasets.surveyData;
> var p=new LzParam();
>
> p.addValue(parent.parent.questionId,this.answerId,
> true);
>
> d.setQueryType("POST");
> d.setQueryString(p); // 3c
> d.doRequest();
>
> if (sDp.selectNext()) {
> surveyView.datapath.setPointer(sDp.p);
> } else
> {
> surveyView.setVisible(false);
> surveyConfirmView.setVisible(true);
> }
> </method>
> </radiobutton>
> </radiogroup>
> <button>Previous Question
> <method event="onclick">
> if (sDp.selectPrev()) {
> surveyView.datapath.setPointer(sDp.p);
> }
> </method>
> </button>
> <button>Next Question
> <method event="onclick">
> if (sDp.selectNext()) {
> surveyView.datapath.setPointer(sDp.p);
> } else
> {
> surveyView.setVisible(false);
>
> surveyConfirmView.setVisible(true);
> }
> </method>
> </button>
> </view>
>
> </class>
>
>
>
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