Hi Philip,
I don't know if you already have the answer, but here are still two ways to
do the trick:
1/ Use data replication: instead of using the code for getting all the
values from the XML by hand, you should try :
(typed in the mail and not tested, so it may contain some typos, but the
idea is here)
<class name="bgpot" height="58" width="66">
<attribute name="bgid" type="number"
value="$path{'id/text()'}"/>
<attribute name="iconpath" value="$path{'icon/text()'}"/>
<attribute name="imagepath" value="$path{'path/text()'}/>
<attribute name="listener" type="expression"/>
<method event="onclick">
listener.changeBackground(this.getAttribute('bgid'),
this.getAttribute('imagepath'));
</method>
<view bgcolor="#444444" height="56" width="64">
<image name="bgicon" resource="${parent.iconpath}"
height="54"
width="64"/>
</view>
</class>
Inside your class "BackgroundChooser", in the view "bgdisplay", insert
<bgpot name="list" datapath="backgroundsRequest:/response/imageList/image"/>
Im guessing the name of the last tag.
You should get an id to your dataset, Ive had trouble with local datasets
you can try datapath="local:parent.parent.backgroundsRequest:/
" for
accessing the local dataset.
2/ use setAttribute instead of directly using the properties in the code :
bg.bgid = nodes[n].getElementsByTagName("id")[0].childNodes[0].data;
should be
bg.setAttribute('bgid',
nodes[n].getElementsByTagName("id")[0].childNodes[0].data);
otherwise the eventing mechanism will not fire and the result will be that
the dependencies wont be updated, and since the resource is specified with
a dependency in the bgicon view, the image will not be loaded.
Hope this helped.
++
Julien
-----Message d'origine-----
De : [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] De la part de Philip A. Chapman
Envoyé : vendredi 21 décembre 2007 17:14
À : [email protected]
Objet : [Laszlo-user] Dynamically adding views with resources from a dataset
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Hash: SHA1
Guys,
I'm trying to create a dialog which will request a list of images from
the server. The XML returns a list with a bunch of URLs. I'm trying to
use the URLs to build a list of thumbnails in the dialog. However, the
thumbnails I create don't show up on the dialog. I know that the images
are not being requested. Any help would be great:
<library>
<class name="bgpot" height="58" width="66">
<attribute name="bgid" type="number" value="0"/>
<attribute name="iconpath"/>
<attribute name="imagepath"/>
<attribute name="listener" type="expression"/>
<method event="onclick">
listener.changeBackground(this.getAttribute('bgid'),
this.getAttribute('imagepath'));
</method>
<view bgcolor="#444444" height="56" width="64">
<image name="bgicon" resource="${parent.iconpath}"
height="54"
width="64"/>
</view>
</class>
<class
name="BackgroundChooser" extends="modaldialog" width="322"
height="245"
bgcolor="#10F60A" visible="false"
>
<attribute name="selectedBackground" type="number" value="0"/>
<method name="changeBackground" args="c">
<![CDATA[
this.setAttribute('selectedBackground', c);
this.close();
]]>
</method>
<view x="-333" y="0" height="245" width="322" visible="false"
name="bgdisplay">
<wrappinglayout axis="x" spacing="5"/>
</view>
<dataset
name="backgroundsRequest" querytype="post" type="http"
onerror="classroot.loadError()"
src="../datatransfer" ondata="classroot.loadSuccess()"
/>
<method name="open"><![CDATA[
Debug.write("Requesting backgrounds...");
var ds = backgroundsRequest;
var p = new LzParam();
p.addValue("sessionid", canvas.drawingStatus.sessionid,
true);
p.addValue("requesttype", "GetBackgrounds", true);
ds.setQueryString(p);
ds.doRequest();
super.open();
]]></method>
<method name="loadError"><![CDATA[
Debug.write('Backgrounds load error');
Debug.write('Response data: ' +
backgroundsRequest.serialize());
]]></method>
<method name="loadSuccess">
var node =
backgroundsRequest.getElementsByTagName("response")[0].getElementsByTagName(
"code")[0].childNodes[0];
if (node.data == "100") {
var nodes =
backgroundsRequest.getElementsByTagName("response")[0].getElementsByTagName(
"imageList")[0].childNodes;
Debug.inspect(this.bgdisplay);
for (n in nodes) {
var bg = new bgpot(this.bgdisplay);
bg.bgid =
nodes[n].getElementsByTagName("id")[0].childNodes[0].data;
bg.iconpath =
nodes[n].getElementsByTagName("iconpath")[0].childNodes[0].data;
bg.imagepath =
nodes[n].getElementsByTagName("path")[0].childNodes[0].data;
this.bgdisplay.addSubview(bg);
}
Debug.write('Backgrounds Loaded successful');
} else {
Debug.write('Backgrounds load failed');
Debug.write('Response data: ' +
backgroundsRequest.serialize());
}
</method>
</class>
</library>
Thanks,
- --
Philip A. Chapman
Desktop and Web Application Development:
Java, .NET, PostgreSQL, MySQL, MSSQL
Linux, Windows 2000, Windows XP
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