Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

XmGetVisibility(3)

NAME

   XmGetVisibility  ---  A  function  that determines if a widget is visible
   "XmGetVisibility"

SYNOPSIS

   #include <Xm/Xm.h>
   XmVisibility XmGetVisibility(
   Widget widget);

DESCRIPTION

   XmGetVisibility returns the visibility state of the  specified  widget.
   It  checks  to  see  if  some  part of the widget's rectangular area is
   unobscured by the widget's ancestors, or  some  part  of  the  widget's
   rectangular  area  is  inside the work window (but possibly outside the
   clip  window)  of  a   ScrolledWindow   whose   XmNscrollingPolicy   is
   XmAUTOMATIC and whose XmNtraverseObscuredCallback is not NULL.

   XmGetVisibility  does  not  check  to  see if widget is obscured by its
   siblings or by siblings of its ancestors. Consequently, XmGetVisibility
   returns  XmVISIBILITY_UNOBSCURED  for  widgets  which are completely or
   partially covered by one or more siblings of  widget  by  one  or  more
   siblings of ancestors of widget.

   When  a  widget  which  is unrealized is being queried, it is indicated
   that the widget is fully obscured.  If an application unmaps  a  widget
   that  has  its  XmNmappedWhenManaged  resource  set to True, the return
   value is undefined.  When a widget which is unmanaged is being queried,
   it is indicated that the widget is fully obscured.

   widget    Specifies the ID of the widget

RETURN

   Returns one of the following values:

   XmVISIBILITY_UNOBSCURED
             Indicates  that  the  widget  is mapped, not obscured, and is
             completely visible on the screen.

   XmVISIBILITY_PARTIALLY_OBSCURED
             Indicates that the widget is mapped, and  is  not  completely
             visible on the screen (partially obscured).

   XmVISIBILITY_FULLY_OBSCURED
             Indicates  that  the  widget  is  not  at  all visible on the
             screen.

RELATED

   XmIsTraversable(3), XmManager(3), and XmProcessTraversal(3).

                                                        XmGetVisibility(3)



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.


Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.


Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner