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LineBox.C
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C/C++ Source or Header
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1998-11-23
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// $Id: LineBox.C,v 1.8 1998/11/23 15:00:22 zeller Exp $
// Line boxes
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// This file is part of DDD.
//
// DDD is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// DDD is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page,
// `http://www.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
char LineBox_rcsid[] =
"$Id: LineBox.C,v 1.8 1998/11/23 15:00:22 zeller Exp $";
#ifdef __GNUG__
#pragma implementation
#endif
#include "LineBox.h"
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
DEFINE_TYPE_INFO_1(LineBox, PrimitiveBox)
// LineBox
// Draw
void LineBox::_draw(Widget w,
const BoxRegion& r,
const BoxRegion& exposed,
GC gc,
bool context_selected) const
{
XGCValues gcvalues;
// Set width and cap style; project beyond end point up to 1/2
// line thickness
gcvalues.line_width = _linethickness;
gcvalues.cap_style = CapProjecting;
XChangeGC(XtDisplay(w), gc, GCLineWidth | GCCapStyle, &gcvalues);
// Keep an empty frame of 1/2 line thickness around R (X may cross
// R's boundaries otherwise)
BoxPoint origin = r.origin();
BoxSize space = r.space();
origin += _linethickness / 2;
space -= _linethickness;
// Draw children
__draw(w, BoxRegion(origin, space), exposed, gc, context_selected);
// Attention: We leave LINE_WIDTH and CAP_STYLE changed!
// (Works within Box::draw(), but the used GC may be changed)
}