This example has been around for a while. It shows how to build a tool to query a layer for information, and to show the information as a personalized form (very easy).

It shows how to create a “tool” style button, one of those you click in the view to make a selection based on the point that was clicked. It is also useful to see how the “andami” style forms are created (inheriting from a Jpanel and using PluginServices).

The files involved are:

• config.xml.- The extension is defined with the button and the corresponding toolbar.
• MyInfoExtension.java.- The class that creates and assign the tool listener.
• tools/MyInfoListener.java.- inherits from InfoListener and over the point() method searches for the polygon over which the user has clicked and creates the dialog box to show the information (DlgProvin).
• gui/DlgProvin.java. A simple panel, with a label and a text box that shows the value of the field of the layer over which we have clicked.
• The extension searches for a layer called “Provin.shp” that is included in the data directory. It needs to be added to the view for the tests.