Changes between Version 32 and Version 33 of MapGuideRfc119


Ignore:
Timestamp:
Jul 20, 2011, 3:12:26 AM (13 years ago)
Author:
samwang
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • MapGuideRfc119

    v32 v33  
    3030Current layer definition schema(2.3.0) already defines an element "URL" of type string in "!VectorLayerDefinition" complex type to store URL information. However, this is quite simple and may far from enough for applications. We can enhance this in the following two aspects:
    3131
    32 1. Description of the URL. The URL is just a universal resource locator in some certain formats, but we may want to display to user more readable text. For example, when user finds a building whose name is 'Empore State Building' in a map, instead of showing user a URL for more detailed information of the building directly, we could provide more descriptive hint such like 'Visit URL http://xxx.xx for more details of Empore State Building' which is much more user firendly. URL Description can also be a string FDO expression.
     321. Description of the URL. The URL is just a universal resource locator in some certain formats, but we may want to display to user more readable text. For example, when user finds a building whose name is 'Empore State Building' in a map, instead of showing user a URL for more detailed information of the building directly, we could provide more descriptive hint such like 'Visit URL www.xxx.com for more details of Empore State Building' which is much more user firendly. URL Description can also be a string FDO expression.
    3333
    34342. URL override setting. The URL defined in vector layer definition 2.3.0 is a string FDO exprerssion. This can be very flexible but also raises a problem. Consider a scenario that the URL element has been assigned the following FDO expression
    … …  
    8484
    8585Now the normal workflow for evaluating the URL content of a feature is:[[BR]]
     86
    8687The application first check '!ContentOverride' child element of the URL element. If its value is not empty and happens to be one of the property names of the feature class the layer is based on, then fetch the actual value(which may be a string FDO expression) from that property of the feature and evaluate the actual value as a FDO expression. Otherwise, ignore it and check 'Content' child and evaluate its value as a FDO expression.
    8788