Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!zaphod.mps.ohio-state.edu!rpi!pattersw
From: pattersw@cs.rpi.edu (William Patterson)
Newsgroups: comp.windows.x
Subject: twm intercepting XDraw...?
Message-ID: <ARR$10$@rpi.edu>
Date: 10 Jul 90 00:31:15 GMT
Distribution: na
Organization: RPI Computer Science Dept.
Lines: 90


twm seems to be intercepting XDraw... calls on my sparc.

I've created a single window, created a GC for it, and called
XDrawRectangle.  If the window attribute override_redirect is set to
true, the window appears and the rectangle is drawn.

If override_redirect is set to false, twm draws an outline of the
window, waits for me to place it, and then maps the window.  The
rectangle, however, never appears.

Anybody know why this is happening?

------------------- relevant code ---------------------------

Code to create window:

    XSetWindowAttributes   theWindowAttributes;
    XSizeHints             theSizeHints;
    unsigned long          theWindowMask;
    Window                 theNewWindow;
    XWMHints               theWMHints;

    theWindowAttributes.border_pixel = theBlackPixel;
    theWindowAttributes.background_pixel = theWhitePixel;
    theWindowAttributes.override_redirect = True;

    theWindowMask = CWBackPixel | CWBorderPixel | CWOverrideRedirect;

    theNewWindow = XCreateWindow(display, RootWindow(display, screen),
			       x, y, width, height,
			       BORDER_WIDTH,
			       depth, InputOutput,
			       CopyFromParent,
			       theWindowMask, &theWindowAttributes);

	<...set size hints parameters...>
    XSetNormalHints ( display, theNewWindow, &theSizeHints);

Code to draw rectangle:

    theGC = createGC( window );
    XDrawRectangle( display, window, theGC, 
	      5, 5,  
	      50, 50 
	      );

    XFlush(display);

Code to create GC:

    theGCValues.foreground = theBlackPixel;
    theGCValues.background = theWhitePixel;
    theGCValues.line_width = 2;
    GCmask = GCForeground | GCBackground | GCLineWidth;
  
    theGC = XCreateGC( display, window, GCmask, &theGCValues );
  
MAIN:
    window = openWindow (0,0, 200, 200);
    XMapWindow( display, window);
    XFlush( display);

    draw (window);
    XFlush(display);

    XDestroyWindow( display, window);

------------------------ END --------------------------

Email, please.  I'll sumarize if other people are having the same
problem (or soln isn`t obvious).

Bill Patterson
pattersw@turing.cs.rpi.edu





-- 

-----------------------------------
Bill Patterson
pattersw@turing.cs.rpi.edu

Computer Science Department
Rensselaer Polytechnic Institute
Troy, NY.
-----------------------------------