deﬁnes attributes that give hints to the window manager to provide such features as title bar
information, resize corners, and so on. If a non-OPEN LOOK window manager is used, there
is no guarantee that these attributes will have any effect.
Pop-up frames are typically used to perform one or more transient functions. They are not
intended to stay up after the set of functions has been completed, although they might remain
up if the user or the application so chooses. This functionality can be handled by a pushpin at
the upper-left corner of the frame. There are different kinds of pop-up frames:
Command Frames give operands and set parameters needed for a command. This is
implemented as a subframe that contains a default panel.
Help Frames display help text for the object under the pointer. This is implemented
as a text subwindow within a subframe.
Notices are special pop-up windows that are used to conﬁrm requests, to dis-
play messages and conditions that must be brought to the user’s atten-
tion and handled immediately. These require immediate attention and
can suspend the application by disallowing the focus from leaving the
Figure 2-4 shows a sample unpinned command frame from the OPEN LOOK GUI Speciﬁca-
Figure 2-4. Sample unpinned command frame
The user may select the option, and the frame will be dismissed (be undisplayed). The push-
pin at the upper-left corner is out of its hole. If the pushpin were in, the command frame
would remain visible even after the user selects an action to take. Figure 2-5 shows a sample
pinned help frame from the OPEN LOOK GUI Speciﬁcation Guide.
The XView Programmer’s Model 27