| From: DEC:.REO.REOVTX::HUDSON "[email protected] - UK Software
Partner Engineering 830-4121" 13-MAY-1997 09:20:13.06
To: nm%vbormc::"[email protected]"
CC: HUDSON
Subj: RE:POINT 28011, Company Ixion BV.
Hello Mr Eken
>Has a program (OpenVMS) that exists of a graphical & text based UI.
>Program needs to be able to switch between these two windows when
>necessary. How can you incorporate such a switch?
If I understand correctly, you want to switch input focus between two Motif
windows in an application under program control. You should be able to do this
using the function
XSetInputFocus
Below I include the documentation from the Unix man page (which should also
apply to VMS).
If this doesn't answer your question, please could you give me a bit more
information on what you're trying to do
Regards
Nick Hudson
Digital Software Partner Engineering
XSetInputFocus(3X11) XSetInputFocus(3X11)
X11R5 X11R5
NAME
XSetInputFocus, XGetInputFocus - control input focus
SYNTAX
XSetInputFocus(display, focus, revert_to, time)
Display *display;
Window focus;
int revert_to;
Time time;
XGetInputFocus(display, focus_return, revert_to_return)
Display *display;
Window *focus_return;
int *revert_to_return;
ARGUMENTS
display Specifies the connection to the X server.
focus Specifies the window, PointerRoot, or None.
focus_return
Returns the focus window, PointerRoot, or None.
revert_to Specifies where the input focus reverts to if the window becomes
not viewable. You can pass RevertToParent, RevertToPointerRoot,
or RevertToNone.
revert_to_return
Returns the current focus state (RevertToParent, RevertToPointer-
Root, or RevertToNone).
time Specifies the time. You can pass either a timestamp or Current-
Time.
DESCRIPTION
The XSetInputFocus function changes the input focus and the last-focus-
change time. It has no effect if the specified time is earlier than the
current last-focus-change time or is later than the current X server time.
Otherwise, the last-focus-change time is set to the specified time
(CurrentTime is replaced by the current X server time). XSetInputFocus
causes the X server to generate FocusIn and FocusOut events.
Depending on the focus argument, the following occurs:
+ If focus is None, all keyboard events are discarded until a new focus
window is set, and the revert_to argument is ignored.
+ If focus is a window, it becomes the keyboard's focus window. If a
generated keyboard event would normally be reported to this window or
one of its inferiors, the event is reported as usual. Otherwise, the
event is reported relative to the focus window.
+ If focus is PointerRoot, the focus window is dynamically taken to be
the root window of whatever screen the pointer is on at each keyboard
event. In this case, the revert_to argument is ignored.
The specified focus window must be viewable at the time XSetInputFocus is
called, or a BadMatch error results. If the focus window later becomes not
viewable, the X server evaluates the revert_to argument to determine the
new focus window as follows:
+ If revert_to is RevertToParent, the focus reverts to the parent (or
the closest viewable ancestor), and the new revert_to value is taken
to be RevertToNone.
+ If revert_to is RevertToPointerRoot or RevertToNone, the focus reverts
to PointerRoot or None, respectively. When the focus reverts, the X
server generates FocusIn and FocusOut events, but the last-focus-
change time is not affected.
XSetInputFocus can generate BadMatch, BadValue, and BadWindow errors.
The XGetInputFocus function returns the focus window and the current focus
state.
DIAGNOSTICS
BadValue Some numeric value falls outside the range of values accepted by
the request. Unless a specific range is specified for an argu-
ment, the full range defined by the argument's type is accepted.
Any argument defined as a set of alternatives can generate this
error.
error.
BadWindow A value for a Window argument does not name a defined Window.
SEE ALSO
XWarpPointer(3X11)
Xlib - C Language X Interface
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