Re: [Laszlo-user] back to square one -- help!

Jim Grandy Tue, 24 Jan 2006 16:21:42 -0800

I was going to ask you to wait about a day until I had a chance to check in the newcombobox integration. But then I tried your test case below, and an optimization in newcombobox is causing really weird behavior with your code.

But don't give up! I'm going to check the integrated component in, and then try another optimization that should work much better.

Basically, one thing newcombobox does is that it shares a single floatinglist between all the newcombobox instances on the canvas. This is to save the time required to instantiate all those floatinglists at startup time. However, sharing requires careful coordination so that change notifications, etc. only go to the currently attached combobox, and not to all of them.

I'm going to try an alternative technique in which we defer instantiating the floatinglist until you actually click on the component. This should have the same startup performance as the existing optimization, but not have the accompanying fragility and complexity.

jim

On Jan 24, 2006, at 3:25 PM, William Krick wrote:

<canvas width="600" height="400">

<dataset name="dsyear" request="true"

   src=""http://www.eio-online.com/symbols/getyear">http://www.eio-online.com/symbols/getyear"/>

<dataset name="dsmake" request="true"

   src=""http://www.eio-online.com/symbols/getmake">http://www.eio-online.com/symbols/getmake"/>

<dataset name="dsmodel" request="true"

   src=""http://www.eio-online.com/symbols/getmodel">http://www.eio-online.com/symbols/getmodel"/>

<dataset name="dsbody" request="true"

   src=""http://www.eio-online.com/symbols/getbody">http://www.eio-online.com/symbols/getbody"/>

<dataset name="dsvin" request="true"

   src=""http://www.eio-online.com/symbols/getvin">http://www.eio-online.com/symbols/getvin"/>

<view x="25" y="25" layout="axis:y">

<combobox id="cbyear" editable="false" width="200">

<method event="onselect">

dsmake.setQueryParam('yearid', cbyear.getValue());

dsmake.doRequest();

</method>

<listitem datapath="dsyear:/resultset/result"

text="$path{'@modelyear'}" value="$path{'@id'}"/>

</combobox>

<combobox id="cbmake" editable="false" width="200">

<method event="onselect">

dsmodel.setQueryParam('yearid', cbyear.getValue());

dsmodel.setQueryParam('makeid', cbmake.getValue());

dsmodel.doRequest();

</method>

<listitem datapath="dsmake:/resultset/result"

text="$path{'@make'}" value="$path{'@id'}"/>

</combobox>

<combobox id="cbmodel" editable="false" width="200">

<method event="onselect">

dsbody.setQueryParam('yearid', cbyear.getValue());

dsbody.setQueryParam('makeid', cbmake.getValue());

dsbody.setQueryParam('modelid', cbmodel.getValue());

dsbody.doRequest();

</method>

<listitem datapath="dsmodel:/resultset/result"

text="$path{'@model'}" value="$path{'@id'}"/>

</combobox>

<combobox id="cbbody" editable="false" width="200">

<method event="onselect">

dsvin.setQueryParam('yearid', cbyear.getValue());

dsvin.setQueryParam('makeid', cbmake.getValue());

dsvin.setQueryParam('modelid', cbmodel.getValue());

dsvin.setQueryParam('bodyid', cbbody.getValue());

dsvin.doRequest();

</method>

<listitem datapath="dsbody:/resultset/result"

text="$path{'@body'}" value="$path{'@id'}"/>

</combobox>

<combobox id="cbvin" editable="false" width="200">

<method event="onselect">

symbol.setAttribute('text', cbvin.getValue());

</method>

<listitem datapath="dsvin:/resultset/result"

text="$path{'@vin'}" value="$path{'@symbol'}"/>

</combobox>

<text id="symbol" bgcolor="silver" width="200"/>

</view>

</canvas>

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Re: [Laszlo-user] back to square one -- help!

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