|When defining custom events in PowerBuilder a lot of people plum for the
old slap a ue_ in front of the name and be done with it. The problem with this standard is
that as the number of events increases it becomes more difficult to find the one you are
after. Also you cannot make use of the type and scrolling feature in the drop down list
box of event names in the script painter.
I have found a combination of prefixes and non
prefixed events works well.
For events that are not custom, these are events that PowerBuilder defines as
standard for a control but are not mapped, for example. On a command button the
pbm_bndoubleclicked event has not been mapped in PowerBuilder, although you probably would
not want to map this event if you did you should name the event doubleclicked, taking the
name the event in the PowerBuilder event mapping dialog.
Class Library Events
If you where creating an event in the Class Library then you should name the
event beginning with ec_ so that people can distinguish that it is an event created and
controlled by the base level of the class library. Taking our previous example if we added
a post double click event we would name it ec_postdoubleclicked.
Insulation Layer Events
Events defined in the insulation layer of your Class Library for project level
enhancements should be labeled with a prefix of ic_ following the standard of the base
In our Class Library we also have a series of events that are performed in the
application sheets. These event names are taken from the menu names and are all processed
automatically by our window services. However we also allow the developer exit points for
the menu operations. We label these events me_ for menu event. For example me_presave,
me_save, me_postsave. These events are mapped by the developer as required.
The last category of events are those created by the developer for their own need
in an application window. These events should be prefixed ue_. That way we can tell at a
glance events added by the developer for this object or window.
By using a set of naming standard for event we can derive a lot of information about where
they where defined and even what they where defined for. This set of standards may not
suit your needs exactly so feel free to tailor them to your needs.