Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

xtcallacceptfocus(3) [hpux man page]

XtCallAcceptFocus()													       XtCallAcceptFocus()

Name
  XtCallAcceptFocus - offer the input focus to a child widget.

Synopsis
  Boolean XtCallAcceptFocus(w, time)
	 Widget w;
	 Time *time;

Inputs
  w	    Specifies the widget; must be of class Core or any subclass thereof.

  time	    Specifies the X time of the event that is causing the accept focus.

Returns
  True if w took the input focus; False if w did not take the input focus.

Description
  XtCallAcceptFocus()  calls  the  specified widget's Core class accept_focus() method, passing it the specified widget and time, and True if
  the widget took the input focus, or False otherwise.	If the accept_focus() method is NULL, XtCallAcceptFocus() returns False.

Usage
  Generally, only widgets should call XtCallAcceptFocus(), and generally only on their descendants.

  Note that calling a widget's accept_focus() method does not automatically assign the input focus, and does not mean that  the  widget  will
  necessarily  take the input focus.  The accept_focus() method must decide whether or not to take the focus and then take it with XSetInput-
  Focus() or XtSetKeyboardFocus().

Background
  Widgets that need the input focus can call XSetInputFocus() explicitly, pursuant to the restrictions	of  the  Inter-Client  Communications
  Convention  Manual.	To  allow  outside  agents,  such  as  the parent, to cause a widget to take the input focus, every widget exports an
  accept_focus() method.  The widget returns a value indicating whether it actually took the focus or not, so that the parent  can  give  the
  focus  to  another widget.  Widgets that need to know when they lose the input focus must use the Xlib focus notification mechanism explic-
  itly (typically by specifying translations for FocusIn and FocusOut events).	Widget classes that never want the input focus should set the
  accept_focus() method to NULL.

See Also
  XtSetKeyboardFocus(1),
  accept_focus(4).

Xt - Keyboard Handling													       XtCallAcceptFocus()

Check Out this Related Man Page

accept_focus()															    accept_focus()

Name
  accept_focus - Core class method for accepting or rejecting the keyboard focus.

Synopsis
  typedef Boolean (*XtAcceptFocusProc)(Widget, Time *);
	 Widget w;
	 Time *time;

Inputs
  w	    Specifies the widget.

  time	    Specifies the X time of the event causing the parent to offer focus to the child.

Returns
  True if the child actually took the focus; False otherwise.

Description
  The  accept_focus()  method  is registered on the accept_focus field of the Core class part structure and is invoked by XtCallAcceptFocus()
  when a parent widget wants to offer keyboard focus to a widget.  If the widget wants the keyboard focus, it should take it  with  the  Xlib
  function XSetInputFocus() and return True.  If the widget does not currently want the focus, it should return False.

  The ICCCM requires that a widget use Parent for the revert_to argument to XSetInputFocus().

  The  accept_focus()  method is not chained.  If a widget class does not define an accept_focus() method, it can use XtInheritAcceptFocus to
  inherit the method from its superclass.  If the widget never wants the focus, it should have an accept_focus field of NULL.

Usage
  Note that this method is an invitation to take the focus, not notification that focus has changed, and not a command to take the focus.

  A widget that needs to know when it loses the focus can specify translations or event handlers for FocusIn and FocusOut events.

  None of the Intrinsics or Xaw widget classes define an accept_focus() method, and none of them ever call XtCallAcceptFocus().

  An application that wants to direct keyboard events to a particular widget should use XtSetKeyboardFocus().

See Also
  XtCallAcceptFocus(1), XtSetKeyboardFocus(1).

Xt - Intrinsics Methods 													    accept_focus()
Man Page

We Also Found This Discussion For You

1. UNIX for Dummies Questions & Answers

alpahbetic input

how can i accept a group of lower case alphabetic input one at a time , ended with 0 and find and display the first letter in alphabetic order. example, input or d f g c should result in c thanks (1 Reply)
Discussion started by: christine33990
1 Replies