Purpose

This sample shows how a custom marker placement can be created. The marker placement puts markers around a point. The placement of markers can be controlled using number of markers and the radius, which are exposed as graphic attributes.

The sample lists implementation of IGraphicAttributes, IMarkerPlacement, and IPersistVariant interfaces and also shows how the custom class should be registered by ESRI Representation Marker Placement Component Category. See the following screen shot:

The Layer Properties dialog box highlighting buttons used in this sample.

Development licensing	Deployment licensing
ArcView	ArcView
ArcEditor	ArcEditor
ArcInfo	ArcInfo

Additional Requirements

• A point feature class with representations. One has been provided for you if you want to use it. In the <your install location>/developerkit/SamplesNET/Desktop/data/Representations folder, representations.gdb has a point feature class US_Major_Cities, which has representations.

How to use

See Using the samples for help on compiling, setting up the debugger, and running the sample (either an exe or dll).

1. Open the Visual Studio solution file.
2. Build the solution.
3. Open ArcMap, then a map document.
4. Click the Add Data button to add a point feature class with representations to the map document.
5. In the Layer Properties dialog box, click the Symbology tab to change the feature renderer to a representation renderer.
6. Select the representation rule within the representation renderer that you want to add this custom marker placement to.
7. Select a basic marker symbol in this representation rule or add a new basic marker symbol.
8. Click the arrow button next to your selected marker symbol layer to open the Marker Placement dialog box, which lists all marker placements. The custom class will be listed under the point input options. Select the Around_Point option.
9. Select the new custom marker placement to put new marker symbols around the point geometry. Change the values for radius and number or accept the default values.

Download the files for all languages