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Volume 7A: XView Programming Manual
book

Volume 7A: XView Programming Manual

by Dan Heller
October 1994
Intermediate to advanced content levelIntermediate to advanced
770 pages
22h 58m
English
O'Reilly Media, Inc.
Content preview from 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, ...
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Publisher Resources

ISBN: 9780937175873