[Chameleon] What does chameleon do?

[Julien-Samuel Lacroix]

Hi,

Sorry I made a mistake here. The label are a little bit problematic in 
this particular case. First, If you want the number on your marker 
remove completly the label statement. Just specicying Label="" only tell 
it to use an empty label. Secondly, since you have more tha one element 
in your shared resource, it's a kind of array. So you will have to use 
the syntax [$MyResult.0.Restaurant_name], [$MyResult.1....], etc.. I 
know it's not very usefull, but the labels were not originally design to 
show content of shared resource with more than one row. In future, there 
will probably be a keyword like [$MyResult._INDEX_.Restaurant_name] to 
use the current record.

#2
You can only see the content of a shared resource from a widget I think. 
Maybe Paul or someone else can confirm that. The Table widget can be 
usefull for seeing the content of a shared resource.

#3
Humm...I don't know. Maybe by putting echo and print_r in the code... ;)
Or since yu work with 1.1, you could try using event 
(http://www.maptools.org/chameleon/wiki/event).

Cheers,

Julien

pxniw pxniw wrote:
> Well for some reason I was not on the chameleon list,
> so some of my questions did not show up.
> 
> Anyhow, it should be working now.
> I got below sample to work, but still had some
> problems with Labels. (Labels won't show, and confused
> what the correct syntax should be.)
> 
> ([$Shared_resource_name.first_element.second_element.etc...])
> 
> LABEL="Restaurant name: [$MyResult.Restaurant_name]"/>
> But still it won't work.
> (Restaurant_name is name of the column in mysql db)
> 
> Question #2
> 
> Where do I see the values currently held with
> SharedResource? Or is it held in the memory?
> 
> Question #3
> 
> What is good way of debugging when trying things out
> with Chameleon?
> 
> Thanks a bunch. Rolling up my sleeves and ready to
> roll ;)
> 
> Px
> 
> --- Julien-Samuel Lacroix <lacroix@dmsolutions.ca>
> wrote:
> 
>>Hi,
>>
>>I fact, he SQLQuery widget can do this, but you
>>should use it in 
>>combination with the MapImageSharedResource widget 
>>
> 
> (http://www.maptools.org/chameleon/wiki/MapImageSharedResource).
> 
>>The SQLQuery widget take a result from an SQL query
>>and put it in a 
>>shared resource
>>
> 
> (http://www.maptools.org/chameleon/wiki/SharedResource).
> 
>>A shared resource will be a kind of container for
>>your data here. Then 
>>you can use the MapImageSharedResource widget to add
>>point in your map. 
>>Note that your shared resource must contains a
>>latitude and a longitude 
>>column.
>>
>>Here's a little example because I know that's a
>>little bit cryptic for 
>>newbies. Don't hesitate to ask more question if you
>>need and try 
>>multiple possibility  with these two widget this
>>will help you to 
>>understand them.
>>
>>First of all, you should include the SQLQuery widget
>>in your template.
>>
>><CWC2 Type="SQLQuery" SharedResourceName="MyResult"
>>SQLQuery="SELECT * 
>>FROM table WHERE type='restaurant'"
>>Server="localhost" 
>>Database="MyDatabase"/>
>>
>>This widget will take all the restaurant from your
>>database and put it 
>>in the Shared Resource called "MyResult".
>>
>>Then, where you want your map, you should include
>>the 
>>MapImageSharedResource widget:
>>
>><CWC2 TYPE="MapImageSharedResource" name="main_map"
>>Width="300" 
>>Height="275" Navigable="false">
>>   <POINTS NAME="START" SRNAME="MyResult"
>>SRLATCOL="lati" 
>>SRLONCOL="long" LABEL="Restaurant name:
>>[$GeocodeResult.name]"/>
>></CWC2>
>>
>>This widget will draw a map (300x275 large) that you
>>could not navigate. 
>>In this map, there will be the points in the
>>MyResult Shared Resource 
>>(Created by the SQLQuery widget). And this points
>>will be placed in the 
>>map with the lat/lon defined in the SQL table
>>columns called "lati" and 
>>"long". Finally, on each point there will be a label
>>"Restaurant name: 
>>the_name_column_in_your_SQL_table".
>>
>>If you want to put a Pin marker instead of a red
>>dot, you will need to 
>>add a MAP parameter in your widget:
>>
>><CWC2 TYPE="MapImageSharedResource" name="main_map"
>>Width="300" 
>>Height="275" Navigable="false">
>>   <POINTS NAME="REST" SRNAME="MyResult"
>>SRLATCOL="latitude" 
>>SRLONCOL="longitude" LABEL="Restaurant name:
>>[$GeocodeResult.name]"/>
>>   <MAP POINT="REST" TYPE="style" PARAM="symbolname"
>>
>>VALUE="markers/pin.png"/>
>>   <MAP POINT="REST" TYPE="style" PARAM="size"
>>VALUE="25"/>
>>   <MAP POINT="REST" TYPE="label" PARAM="color"
>>VALUE="00FF00"/>
>></CWC2>
>>
>>This will change the symbol used for the symbol
>>markers/pin.png. The 
>>size will be 25 pixels and the color of the label on
>>it will be green 
>>(RGB = 00FF00). You could change most (if not all)
>>of the parameters of 
>>the layer that can be changed with php/mapscript
>>with this widget. For 
>>other parameters check
>>
> 
> http://mapserver.gis.umn.edu/doc40/mapfile-reference.html#layer
> 
>>Hope this will help.
>>
>>Cheers,
>>
>>Julien
>>
>>
>>Paul Spencer wrote:
>>
>>>Hi,
>>>
>>>don't have time to respond properly for a few days
>>
>>given the holidays, 
>>
>>>but I don't think the SQLQuery widget will do what
>>
>>you want, but it 
>>
>>>should be possible to do it with mapserver and ogr
>>
>>using virtual 
>>
>>>datasources ... will discuss when I have time.
>>>
>>>Cheers,
>>>
>>>Paul
>>>
>>>pxniw pxniw wrote:
>>>
>>>
>>>>Thanks this cleared up things a bit.
>>>>Basically its copy and Paste type of environment
>>>>rather than swyg system. Ie if I want to add
>>
>>something
>>
>>>>for the sample file, I would add "<CWC> some
>>
>>widget
>>
>>>>here <CWC>" to sample html file.
>>>>
>>>>Ok going for more advanced stuff:
>>>>I noticed that Chameleon will handle MySQL?
>>>>Found this:
>>>>http://www.maptools.org/chameleon/wiki/SQLQuery
>>>>
>>>>Is this able to do this?
>>>>
>>>>I have php and perl scripts working for mapserver
>>
>>with
>>
>>>>Chameleon and MapLab.
>>>>I also have some other data in MySQL database.
>>>>Tables have info like:
>>
>>RestaurantName;City;Lat;Lon
>>
>>>>How do I query either in PHP or Perl
>>
>>RestaurantName
>>
>>>>and provide a Pin Label (Marker) for Lat Lon
>>>>coordinates on my existing mapserver layout for
>>
>>single
>>
>>>>restaurant?
>>>>
>>>>Ie: I have a map of Georgia displayed. User have
>>>>options to type city in text box (ie Atlanta),
>>
>>and hit
>>
>>>>Go button.
>>>>
>>>>How do I query the MySQL db and show restaurant
>>>>locations in existing map?
>>>>
>>>>Thank You for all of who have provided their time
>>
>>for
>>
>>>>these projects, I will try to do the same, once I
>>>>learn things a bit more.
>>>>Happy Holidays
>>>>
>>>>
>>>>--- Bart van den Eijnden <bartvde@xs4all.nl>
>>
>>wrote:
>>
>>>>>Hi,
>>>>>
>>>>>basically Chameleon is being fed a HTML template
>>>>>with special tags in it, you can recognize them
>>
>>by "CWC". A zoom-in 
>>
>>>>>tool for
>>>>>instance is a widget and is recognized by the
>>
>>CWC in the HTML template.
>>
>>>>>The basic unit of Chameleon is the widget, the
>>
>>HTML template is a
>>
>>>>>collection of widgets.
>>>>>
>>>>>Chameleon interprets this template and creates
>>
>>HTML
>>
>>>>>and javascript, which will turn into a
>>
>>full-featured web mapping client.
>>
>>>>>Also, it needs to know which map layers to draw,
>>>>>that's the second configuration element, so
>>
>>always a Mapserver MAP
>>
>>>>>file which you can create with Maplab if you
>>
>>want (or a Web Map Context
>>
>>>>>document, but this is harder), is needed.
>>>>>
>>>>>In the index.phtml of your sample application
>>
>>both
>>
>>>>>the HTML template and the MAP file are linked.
>>
>>This is specific for
>>
>>>>>Chameleon 1.1 and was different in Chameleon 1.0
>>
>>(which had a service
>>
>>>>>instance which interpreted templates instead of
>>
>>one application per HTML
>>
>>>>>template/MAP file combination).
>>
> === message truncated ===
> 
> 
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-- 
------------------------------------------------------------
Julien-Samuel Lacroix            lacroix@dmsolutions.ca
DM Solutions Group               http://www.dmsolutions.ca/
------------------------------------------------------------