Created attachment 21802 [details]
Screen shot showing MailerVisualizer as 3rd pane on Monitor Results

I have created the enhancement suggested in the Comment above the MonitorHealthVisualizer.java source file. The comment suggests to implement the MailerVisualizer.java source file as the 3rd pane on the MonitorHealthVisualizer class. I have done as the Comment suggests and visually it appears to be the same as the original component available under Add Listeners to add the MailerVisualizer. I have done no testing. There are early indications there may be problems if a MailerVisualizer Listener is added after a Monitor Results Listener is added. Please find attached a .PNG of the JMeter gui screen shot of the MonitorHealthVisualizer panel with the newly added MailerVisualizer third pane added to the Monitor Results panel. If the screen-shot is acceptable please reply with criticisms as needed such that I can begin looking into how I should start testing. I have studied build.xml for the various targets: compile-junit and the like but I am not at all sure how to proceed with the testing. For now I can just do so-called unit-testing to see if the pane works as the original Listener. I would very much like to move forward with this work such that the finished source can be contributed to the JMeter project. To implement the third pane I have created a source: MonitorMailerPanel.java that extends JSplitPane and implements the interfaces: TreeSelectionListener, MonitorListener and Clearable. And, the new source file is doing the same dirty work as the MailerVisualizer class. I updated the MonitorHealthVisualizer panel to accommodate the new source file with a private variable: MAILERPANE and one new method: createMonitorMailerPane(). Please advise.