[Laszlo-dev] destroy http resource loading view hangs application

[Denis Bohm]

I tried that also - it doesn't seem to work either.  Other ideas?

Henry Minsky wrote:
> You probably want to call
>
> loader.unload( mediaLoadObj);
>
> So that 'this' is bound to what it expects.
>
>
>
> On 1/30/06, *Denis Bohm* < denis at fireflydesign.com 
> <mailto:denis at fireflydesign.com>> wrote:
>
>     I tried the code below, but it doesn't seem to work.  Is that the
>     right thing to do?
>
>     <canvas>
>
>         <simplelayout axis="y"/>
>         <button text="click me">
>             <method event="onclick"><![CDATA[
>                 // remove old subviews
>                 for (var i = 0; i < LzLoadQueue.listofqs.length; ++i) {
>                     var q = LzLoadQueue.listofqs[i];
>                     if (q != undefined) {
>                         for (var j = q.length - 1; j >= 0; --j) {
>                             var mediaLoadObj = q[j];
>                             var loader = mediaLoadObj.loader;
>                             Debug.inspect(mediaLoadObj);
>                             LzMediaLoader.prototype.unload(mediaLoadObj);
>                         }
>                     }
>                 }
>                 var subviews = content.subviews;
>                 for (var i = subviews.length - 1; i >= 0; --i) {
>                     var view = subviews[i];
>                     Debug.write(view.loader);
>                     view.destroy();
>                 }
>                
>                 // add some new ones
>                 for (var i = 0; i < 10; ++i) {
>                     new LzView(parent.content, {resource:
>     "http:icons/star.png" <http:icons/star.png>});
>                 }
>             ]]></method>
>         </button>
>         <view name="content">
>             <simplelayout axis="x"/>
>         </view>
>        
>     </canvas>
>
>     Henry Minsky wrote:
>>     Loading of a resource or data is managed by the LzLoader class.
>>
>>     There is a way to remove a load request from the load queue,
>>     which is used by
>>     the timeout code in LzLoader.
>>
>>     You need to call LzLoader.prototype.unload , but the arg it takes
>>     is a "load object" which  you need to get your hands on.
>>
>>     For media loads, I believe this will get it for you:
>>
>>     LzMediaLoader.prototype.getLoadMC
>>
>>     (LzMediaLoader is a subclass of LzLoader)
>>
>>
>>     However for data loads, something else needs to be done to get
>>     your hands on the
>>     "load object" from an LzLoader.
>>
>>
>>
>>     On 1/30/06, * Denis Bohm* <denis at fireflydesign.com
>>     <mailto:denis at fireflydesign.com>> wrote:
>>
>>         I added the code below in the onclick method and it appears
>>         that when a
>>         view is destroyed, it's loader is not taken out of the load
>>         queue - so
>>         the load never finishes.  The load queue is then stuck and no
>>         more loads
>>         occur.  I tried calling view.unload, but it doesn't appear to
>>         work.
>>         Anyone know how to remove something out of the load queue
>>         properly?
>>
>>                     for (var i = 0; i < LzLoadQueue.listofqs.length;
>>         ++i) {
>>                         Debug.write(LzLoadQueue.listofqs[i].length);
>>                     }
>>
>>         P T Withington wrote:
>>         > I can believe there is a bug there.  Try setting
>>         > LzLoader.__LZMonitorState to true.  This will trace the load
>>         queue in
>>         > the debugger.  Perhaps that will reveal something.
>>         >
>>         > On 30 Jan 2006, at 01:41, Denis Bohm wrote:
>>         >
>>         >> The program below removes the images from a container and
>>         then loads
>>         >> ten images when you click the button.  If you wait for all
>>         the images
>>         >> to load then it works fine.  If you click before all the
>>         images are
>>         >> loaded it hangs.  Am I doing something wrong or is this a bug?
>>         >>
>>         >> <canvas>
>>         >>
>>         >>    <simplelayout axis="y"/>
>>         >>    <button text="click me">
>>         >>        <method event="onclick"><![CDATA[
>>         >>            // remove old subviews
>>         >>            var subviews = content.subviews ;
>>         >>            for (var i = subviews.length - 1; i >= 0; --i) {
>>         >>                var view = subviews[i];
>>         >>                view.destroy();
>>         >>            }
>>         >>                       // add some new ones
>>         >>            for (var i = 0; i < 10; ++i) {
>>         >>                new LzView(parent.content, {resource:
>>         >> "http:icons/star.png" <http:icons/star.png>});
>>         >>            }
>>         >>        ]]></method>
>>         >>    </button>
>>         >>    <view name="content">
>>         >>        <simplelayout axis="x"/>
>>         >>    </view>
>>         >>    </canvas>
>>         >> _______________________________________________
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>>         <http://www.openlaszlo.org/mailman/listinfo/laszlo-dev>
>>         >
>>         >
>>
>>         _______________________________________________
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>>
>>
>>
>>
>>     -- 
>>     Henry Minsky
>>     Software Architect
>>     hminsky at laszlosystems.com <mailto:hminsky at laszlosystems.com>
>>
>
>
>
>
> -- 
> Henry Minsky
> Software Architect
> hminsky at laszlosystems.com <mailto:hminsky at laszlosystems.com>
>

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