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drawingcursor.hpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Guido Tack <tack@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Guido Tack, 2006
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  * Permission is hereby granted, free of charge, to any person obtaining
00014  * a copy of this software and associated documentation files (the
00015  * "Software"), to deal in the Software without restriction, including
00016  * without limitation the rights to use, copy, modify, merge, publish,
00017  * distribute, sublicense, and/or sell copies of the Software, and to
00018  * permit persons to whom the Software is furnished to do so, subject to
00019  * the following conditions:
00020  *
00021  * The above copyright notice and this permission notice shall be
00022  * included in all copies or substantial portions of the Software.
00023  *
00024  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 namespace Gecode { namespace Gist {
00035 
00036   inline void
00037   DrawingCursor::moveUpwards(void) {
00038     x -= node()->getOffset();
00039     y -= Layout::dist_y;
00040     NodeCursor<VisualNode>::moveUpwards();
00041   }
00042 
00043   forceinline bool
00044   DrawingCursor::isClipped(void) {
00045     if (clippingRect.width() == 0 && clippingRect.x() == 0
00046         && clippingRect.height() == 0 && clippingRect.y() == 0)
00047       return false;
00048     BoundingBox b = node()->getBoundingBox();
00049     return (x + b.left > clippingRect.x() + clippingRect.width() ||
00050             x + b.right < clippingRect.x() ||
00051             y > clippingRect.y() + clippingRect.height() ||
00052             y + (node()->getShape()->depth()+1) * Layout::dist_y <
00053             clippingRect.y());
00054   }
00055 
00056   inline bool
00057   DrawingCursor::mayMoveDownwards(void) {
00058     return NodeCursor<VisualNode>::mayMoveDownwards() &&
00059            !node()->isHidden() &&
00060            node()->childrenLayoutIsDone() &&
00061            !isClipped();
00062   }
00063 
00064   inline void
00065   DrawingCursor::moveDownwards(void) {
00066     NodeCursor<VisualNode>::moveDownwards();
00067     x += node()->getOffset();
00068     y += Layout::dist_y;
00069   }
00070 
00071   inline void
00072   DrawingCursor::moveSidewards(void) {
00073     x -= node()->getOffset();
00074     NodeCursor<VisualNode>::moveSidewards();
00075     x += node()->getOffset();
00076   }
00077 
00078 
00079 }}
00080 // STATISTICS: gist-any