ArcGIS Engine Developer Guide

BUILDING APPLICATIONS WITH VISUAL JAVABEANS
8. Run the application. Use the map navigation tools that you added earlier to
change the extent of the focus map in the pageLayout component, and observe
that the new extent is drawn on the map component as a red rectangle.
Navigating around the focus map using the map
navigation tools will change the extent of the
focus map in the PageLayoutBean and cause
the MapBean to update. Navigating around the
page layout with the page layout navigation
tools will change the extent of the page layout
(not the extent of the focus map in the
PageLayoutBean), so the MapBean will not
update.
Creating a custom tool
You will create a custom tool that can be added to the ToolbarBean. This tool
will add today’s date as a text element to the PageLayoutBean, at the location of
a mouse click.
The tool will be built as a generic tool so it can work with MapBean and
ToolbarBean as well as the PageLayoutBean.
Custom tools can be built as Java classes that implement the following two
interfaces:
com.esri.arcgis.systemUI.ICommand;
com.esri.arcgis.systemUI.ITool;
1. Create a new file called AddDateCommand.java:
// AddDateCommand.java
import com.esri.arcgis.systemUI.ICommand;
import com.esri.arcgis.systemUI.ITool;
public class AddDateCommand implements ICommand, ITool {
} // end AddDateCommand class
Since this class implements the ICommand and ITool interfaces, it will compile only
after all methods belonging to these interfaces have been implemented.
2. Add implementation for all methods defined in ICommand, as shown below.
The implementation of onCreate and onClick methods will be done in the
next step, so you can leave an empty implementation for now.
320 • ArcGIS Engine Developer Guide