[Laszlo-user] Lazy Replication

[P T Withington]

Correct.  The lazy manager has to be more intimately tied to the  
layout because it needs to compute how many items will fit in order to  
load just enough data.  This is an area for improvement:  there should  
be a general protocol between replication and layout, but for now  
there is not.

On 2008-01-30, at 22:25 EST, Henry Minsky wrote:

> I seem to recall that the lazy replication manager assigns it's own
> layout, ignoring any pre-existing one but you can assign an axis
> and a spacing attribute.
>
>
>
> On Wed, Jan 30, 2008 at 8:13 PM, Fernando Germano  
> <fgermano at gmail.com> wrote:
>> Ok, adding a width and a height to the image solved the problem of  
>> images
>> not being displayed, but there are still a couple of things that I  
>> quite
>> don't understand, this works...
>>
>>            <view  clip="true" width="540" height="90" id="contenido">
>>                 <view id="listado" layout="axis:x">
>>                    <image width="90" height="90">
>>                        <datapath xpath="s:/items[1]/item/imgurl/ 
>> text()" />
>>                     </image>
>>                </view>
>>            </view>
>>
>> But, If I add replication="lazy" to the datapath definition things  
>> no longer
>> works, two things happens:
>>
>> * If I keep the image then I only see one (I believe I'm seeing  
>> something
>> similar to the width and height issue).
>> * If I use a text then I see a list of the items but they don't  
>> seem to
>> respect any layout option, the just appear one below the other.
>>
>>
>> Thank you!
>>
>>
>>
>> On Jan 30, 2008 12:30 AM, Henry Minsky <henry.minsky at gmail.com>  
>> wrote:
>>> I don't know what the warning is trying to indicate.
>>>
>>> Is the data appearing? You may need to set the height explicitly, I
>>> think there may be a bug in the replication manager updating
>>> the view height automatically, so your images might be clipped.
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Jan 29, 2008 9:59 PM, Fernando Germano <fgermano at gmail.com>  
>>> wrote:
>>>> I need to work with some large dataset, an XML having links to  
>>>> images
>> that I
>>>> must show, basically a gallery like many around there, so I want  
>>>> to do
>> some
>>>> paging and of course lazy replication, so, the basic code looks  
>>>> like
>> this:
>>>>
>>>>            <view clip="true" width="540" id="cont">
>>>>                <view id="list">
>>>>                    <simplelayout axis="x"/>
>>>>                    <image>
>>>>                         <datapath
>> xpath="s:/items[1]/item/img_url/text()"
>>>> replication="lazy"/>
>>>>                    </image>
>>>>                 </view>
>>>>            </view>
>>>>
>>>> But when I try this I get the following error:
>>>>
>>>> INFO: __LZprocessOperator: p is null in Datapath for image
>>>>
>>>>
>>>> What am I missing?
>>>>
>>>> Thank you!!
>>>>
>>>
>>>
>>>
>>> --
>>> Henry Minsky
>>> Software Architect
>>> hminsky at laszlosystems.com
>>>
>>
>>
>
>
>
> -- 
> Henry Minsky
> Software Architect
> hminsky at laszlosystems.com