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From: jgraham@crc.skl.dnd.ca (Jay Graham)
Newsgroups: comp.windows.x
Subject: Dashed line problem
Message-ID: <9103251719.AA27747@crc.skl.dnd.ca>
Date: 25 Mar 91 16:19:21 GMT
Sender: tytso@athena.mit.edu (Theodore Y. Ts'o)
Organization: The Internet
Lines: 58



If I have line style set to LineOnOffDash, is there any reason why
a call to XDrawArc will use the line style but a call to XDrawLine
will not?

Here are the concerned pieces of my code:

    Display *mydisplay;
    Window  mywindow;       /* Main window. */
    Window  SitWindow;      /* Child of mywindow. */

    static char dash[] = {20, 10};
    unsigned long valuemask;
    XGCValues values;

    .
    .
    .

        valuemask = GCLineStyle | GCCapStyle | GCJoinStyle | GCDashOffset |
                    GCDashList;
        values.line_style = LineOnOffDash;
        values.cap_style = CapNotLast;
        values.join_style = JoinMiter;
        values.dash_offset = 0;
        values.dashes = dash[0];

        mygc = XCreateGC( mydisplay, mywindow, valuemask, &values );

        .
        .
        .

                           Start_Angle = 0;
                           Draw_Thru_Angle = 64 * 360;
                           XDrawLine(mydisplay, SitWindow,
                                     mygc, 12,60, 80,60);
                           XDrawArc(mydisplay,
                                    SitWindow, mygc,
                                    12, 60,      /* x,y of rect.*/
                                    77*9, 77*9,  /*width height of rect.  */
                                    Start_Angle, Draw_Thru_Angle);


I also tried using XSetLineAttributes and XSetDashes but the results were
the same.


I am using X11R3.

Thanks in advance.


Jay Graham
Software Kinetics Ltd.,
Ottawa, Ontario, Canada,
jgraham@crc.skl.dnd.ca