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| XmtHelpInstallContextHelp(3) | FreeBSD Library Functions Manual | XmtHelpInstallContextHelp(3) |
NAME
XmtHelpInstallContextHelp(), XmtHelpContextHelpCallback() - keyboard bindings for context help.SYNOPSIS
void XmtHelpInstallContextHelp(Widget root, XtCallbackProc proc, XtPointer data)
void XmtHelpContextHelpCallback(Widget w, XtPointer unused1, XtPointer unused2)
ARGUMENTS
INPUTS- root
- The root of the widget tree for which the specified context help callback is to be registered.
- proc
- The callback procedure to register.
- data
- The data to register with the callback procedure.
- w
- For XmtHelpContextHelpCallback(), the widget for which context help is to be displayed.
- unused1, unused2
- These arguments to XmtHelpContextHelpCallback() are unused.
DESCRIPTION
XmtHelpInstallContextHelp() recursively traverses the widget tree rooted at root and registers the callback procedure proc with client data data on the XmNhelpCallback callback list of every widget that is a Motif widget or a subclass and that has its XmNtraversalOn resource set to True. That is, it calls XtAddCallback() for the XmNhelpCallback for every wid get that can have the keyboard focus. All Motif widgets and their Xmt subclasses have an XmNhelpCallback callback list, and invoke the procedures registered on that list whenever they have the keyboard focus and the user strikes the Help key (usually bound to F1).XmtHelpContextHelpCallback() is a convenience function that calls XmtHelpDisplayContextHelp() to display context help on the widget w. This function is of type XtCallbackProc, so it can be directly registered on the XmNhelpCallback callback list supported by all Motif and Xmt widgets. It can also be passed to XmtHelpInstallContextHelp() to register it on many widgets at once.
SEE ALSO
Chapter 30, Context Help,XmtHelpDisplayContextHelp(), XmtHelpDoContextHelp(), XmtHelpGetContextHelp().
| Motif Tools | Xmt |
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