Volume 7A: XView Programming Manual

XView object handles. For xv_get(), only the XView object handle should be passed as

an argument. It will return a ptr to the callback function.

SERVER_EXTERNAL_XEVENT_PROC and SERVER_EXTERNAL_XEVENT_MASK can be set in any

order. Each attribute can be temporarily disabled then re-enabled later without having to set

the other attribute. Setting the first argument of SERVER_EXTERNAL_XEVENT_PROC to NULL

will disable the callback for the object specified as the second argument.

The callback set using SERVER_EXTERNAL_XEVENT_PROC may be called back for an X event

that was not specified using SERVER_EXTERNAL_XEVENT_MASK. The reason being is that

other objects within the toolkit or application may select for X events on the same window.

When these events are delivered, it is difficult to map the X event back to X masks, in turn

making it difficult to determine who selected them. Thus the toolkit lets the application

determine if it wants to use the event or not.

6.12 Soft Function Keys and Virtual Keyboards

This section describes the soft function keys and virtual keyboards.

OPEN LOOK encourages

applications to use the function keys for tasks specific to the individual application. The soft

function key labels are configurable for each application and provide application-specific

labels for the function keys. Soft function keys allow “function keys” to be selected from an

on-screen panel using the mouse. Thus, ...