Adding Drill-down Capabilities

One of the most attractive features of Google Maps is their drill-down capabilities: clicking a Map Marker in a map causes a pop-up info panel to open, which can contain detail information. The same is true for Map Polygons - they can also be clicked in order to drill into the data. Continuing with the previous example, found in Creating a Map with Polygons, here's how this capability is added:

1. In the report definition, start by selecting the Map Polygons element. Beneath it add an Action.Map Marker Info element, and then beneath it, a Map Marker Info element, as shown above. Neither needs any configuration beyond being given an ID.
   
   
   

2. Beneath the Map Marker Info element, add a Division element and beneath it add several Label and New Line elements, as shown above. The Division allows a uniform style to be applied to the Labels, and the Labels display detail data from the datalayer, which is still in scope. Note the use of an @Data token to display the school district name.
   
   
   

3. Next select the Map Marker Info element again and beneath it add SubReport and Target.Report elements, as shown above. This will allow you to add a chart or table, defined in a separate definition, to the pop-up info panel. The Frame Border and Scrolling attributes are set to False so that the chart or table will embed smoothly into the pop-up panel.
   
   
   

4. Finally, a Link Parameters element can be added beneath the SubReport element, as shown above, to pass identifying information to the detail report.
   

The resulting pop-up information panel displayed when a polygon is clicked is shown above.