[mapguide-users] Selection problem with map stored in session repository

[Kenneth, GEOGRAF A/S]

It would be nice to have it posted as a bug.
You don't have to find the solution before posting the bug :)

If it turns out it is related to some local stuff on your machine
some developer will probably ask for details later or delete the bug.

Regards, Kenneth, GEOGRAF A/S



Ismael Cams skrev:
> Hello,
>
> I was able to isolate the problem. In the layout that was causing the
> problem I turned on the legend, but disabled the properties pane. After done
> another test in the MapGuide Studio I noticed it was causing the same
> problem when turning off the properties pane and enable the legend.
> I did not investigate if this is a general problem or if it is specific for
> the situation I am encountering.
>
> Is this sufficient to report a bug (problem with selection of features on
> pointlayer when legend is enabled and properties pane disabled) ?
>
> Thanks for the help Kenneth, it pointed me in the direction of the final
> solution.
>
> Kind regards,
> Ismaël
>
>
> Kenneth, GEOGRAF A/S wrote:
>   
>> I belive that the function you should examine is this:
>>
>>     function ScreenToMapUnits2(x, y, bAllowOutsideWindow)
>>     {
>>         if(!bAllowOutsideWindow)
>>         {
>>             if(x > mapDevW - 1) x = mapDevW - 1;
>>             else if(x < 0) x = 0;
>>
>>             if(y > mapDevH - 1) y = mapDevH - 1;
>>             else if(y < 0) y = 0;
>>         }
>>
>>         x = extX1 + (extX2 - extX1) * (x / mapDevW);
>>         y = extY1 - (extY1 - extY2) * (y / mapDevH);
>>         return new Point(x, y);
>>     }
>>
>> You then have to determine if it is extY1, extY2 or mapDevH that is wrong.
>> Once you find that out, you should examine areas where they get 
>> calculated, to further narrow it down.
>>
>> Regards, Kenneth, GEOGRAF A/S
>>
>>
>>
>> Ismael Cams skrev:
>>     
>>> Thanks for the answer Kenneth.
>>>
>>> I have checked the coordinates and they are indeed skewed. The x
>>> coordinates
>>> are ok, but the y coordinates do not match (which explains why I have to
>>> click somewhat above the point in order to select it). As soon as I
>>> resize
>>> the legend frame the coordinates get ok.
>>>
>>> The MCS part is not clear to me. Can I somehow make changes to this
>>> functions in order to solve the problem or can I try something else
>>> (without
>>> having to disable my legend) ? 
>>>
>>> For your notice: I make also selections programatically. This works fine
>>> in
>>> all cases. 
>>>
>>>
>>> Kenneth, GEOGRAF A/S wrote:
>>>   
>>>       
>>>> I would say that the offset is likely caused by something incorrect on 
>>>> the html side.
>>>> If point 7 means: create 2 layouts in studio and test them in the same
>>>> app,
>>>> it would appear that a setting in the WebLayout file causes the html to 
>>>> report bad map offsets.
>>>>
>>>> You might see the actual coordinats being sent, by inserting an 
>>>> "alert(...)" in ajaxmappane.templ,
>>>> where it builds the polygon (search for "POLYGON").
>>>>
>>>> If the coordinates are correct (ea. the same), I have no clue.
>>>>
>>>> If the coordinates are skewed, look in the ajaxmappane.templ,
>>>> for the function that calculates the MCS coordinates from screen (x,y).
>>>> That functions has some offsets, and it is my guess that they slip a
>>>> bit.
>>>>
>>>> Regards, Kenneth, GEOGRAF A/S
>>>>
>>>>
>>>>
>>>> Ismael Cams skrev:
>>>>     
>>>>         
>>>>> I have following situation:
>>>>>
>>>>> 1. I build dynamically two weblayouts in a session. One is containing a
>>>>> legend, the other one is only containing the zoom control.
>>>>> 2. The weblayouts refer to the same mapdefinition that is also build in
>>>>> a
>>>>> session.
>>>>> 3. The mapdefinition is referring to a point layer (sessionlayer)
>>>>> 4. Making a selection in the weblayout without legend works fine.
>>>>> 5. Making a selection in the weblayout with legend does not work
>>>>> correctly.
>>>>> I have to click above the point to actually make the selection.
>>>>> 6. When I minimize the legend frame (by using the arrow in the
>>>>> webbrowser)
>>>>> the selection suddenly works correctly. Also when I disable the legend
>>>>> in
>>>>> the first layout this is also working fine.
>>>>> 7. When I create the same scenario with Studio I do not encounter the
>>>>> problem (selection is working without problems).
>>>>>
>>>>> I believe it has something to do with using the same session, but I do
>>>>> not
>>>>> have a clue where to look after. Can someone give me hints about what
>>>>> could
>>>>> be the problem ?
>>>>>
>>>>> Kind regards,
>>>>> Ismaël
>>>>>   
>>>>>       
>>>>>           
>>>> _______________________________________________
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>>>> mapguide-users at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>>>
>>>>
>>>>     
>>>>         
>>>   
>>>       
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>>
>>
>>     
>
>   
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