EI/VirtualLeaf Files · src/qcanvasarrow.h · Centrum Wiskunde & Informatica (CWI)

Files @ bc383c25c970

Branch filter:

Location: EI/VirtualLeaf/src/qcanvasarrow.h

bc383c25c970 2.0 KiB text/x-chdr Show Annotation Show as Raw Download as Raw

Michael Guravage

Moved the Windows LIBXML2, LIBICONV and LIBZ libraries into the
destribtion, and changed the various project files accordingly.

--
user: Michael Guravage <michael.guravage@cwi.nl>
branch 'default'
added lib/libiconv/include/iconv.h
added lib/libiconv/include/libcharset.h
added lib/libiconv/include/localcharset.h
added lib/libiconv/lib/charset.alias
added lib/libiconv/lib/libcharset.la
added lib/libiconv/lib/libiconv.la
added lib/libiconv/share/doc/libiconv/COPYING
added lib/libiconv/share/doc/libiconv/COPYING.LIB
added lib/libiconv/share/doc/libiconv/NEWS
added lib/libiconv/share/doc/libiconv/NOTES
added lib/libxml2/include/libxml/DOCBparser.h
added lib/libxml2/include/libxml/HTMLparser.h
added lib/libxml2/include/libxml/HTMLtree.h
added lib/libxml2/include/libxml/SAX.h
added lib/libxml2/include/libxml/SAX2.h
added lib/libxml2/include/libxml/c14n.h
added lib/libxml2/include/libxml/catalog.h
added lib/libxml2/include/libxml/chvalid.h
added lib/libxml2/include/libxml/debugXML.h
added lib/libxml2/include/libxml/dict.h
added lib/libxml2/include/libxml/encoding.h
added lib/libxml2/include/libxml/entities.h
added lib/libxml2/include/libxml/globals.h
added lib/libxml2/include/libxml/hash.h
added lib/libxml2/include/libxml/list.h
added lib/libxml2/include/libxml/nanoftp.h
added lib/libxml2/include/libxml/nanohttp.h
added lib/libxml2/include/libxml/parser.h
added lib/libxml2/include/libxml/parserInternals.h
added lib/libxml2/include/libxml/pattern.h
added lib/libxml2/include/libxml/relaxng.h
added lib/libxml2/include/libxml/schemasInternals.h
added lib/libxml2/include/libxml/schematron.h
added lib/libxml2/include/libxml/threads.h
added lib/libxml2/include/libxml/tree.h
added lib/libxml2/include/libxml/uri.h
added lib/libxml2/include/libxml/valid.h
added lib/libxml2/include/libxml/xinclude.h
added lib/libxml2/include/libxml/xlink.h
added lib/libxml2/include/libxml/xmlIO.h
added lib/libxml2/include/libxml/xmlautomata.h
added lib/libxml2/include/libxml/xmlerror.h
added lib/libxml2/include/libxml/xmlexports.h
added lib/libxml2/include/libxml/xmlmemory.h
added lib/libxml2/include/libxml/xmlmodule.h
added lib/libxml2/include/libxml/xmlreader.h
added lib/libxml2/include/libxml/xmlregexp.h
added lib/libxml2/include/libxml/xmlsave.h
added lib/libxml2/include/libxml/xmlschemas.h
added lib/libxml2/include/libxml/xmlschemastypes.h
added lib/libxml2/include/libxml/xmlstring.h
added lib/libxml2/include/libxml/xmlunicode.h
added lib/libxml2/include/libxml/xmlversion.h
added lib/libxml2/include/libxml/xmlwin32version.h
added lib/libxml2/include/libxml/xmlwriter.h
added lib/libxml2/include/libxml/xpath.h
added lib/libxml2/include/libxml/xpathInternals.h
added lib/libxml2/include/libxml/xpointer.h
added lib/libxml2/lib/libxml2.dll
added lib/libxml2/lib/libxml2.lib
added lib/libz/include/zconf.h
added lib/libz/include/zlib.h
changed src/ChangeLog
changed src/Makefile
changed src/VirtualLeaf.pro
changed src/build_models/ChangeLog
changed src/build_models/Makefile
changed src/build_models/plugin_auxingrowth.pro
changed src/build_models/plugin_meinhardt.pro
changed src/build_models/plugin_test.pro
changed src/libplugin.pro

/*
 *
 *  $Id$
 *
 *  This file is part of the Virtual Leaf.
 *
 *  The Virtual Leaf 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  The Virtual Leaf 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 the Virtual Leaf.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  Copyright 2010 Roeland Merks.
 *
 */


#ifndef _QCANVASARROW_H_
#define _QCANVASARROW_H_

#include <QGraphicsScene>

class QGraphicsArrowItem : public QGraphicsLineItem {

 public:
 QGraphicsArrowItem(QGraphicsItem *parent, QGraphicsScene *c) : QGraphicsLineItem(parent, c) {};

  void paint ( QPainter *p, const QStyleOptionGraphicsItem *option,
	       QWidget *widget ) {

    widget = NULL; //use assignment merely to obviate compilation warning
    option = NULL;

    // construct arrow head
    QPointF start=line().p1();
    QPointF end=line().p2();
    QPointF mid=start + (3./4.)*(end-start);

    double vx=end.x()-start.x();
    double vy=end.y()-start.y();

    double length = sqrt(vx*vx+vy*vy);
    if (length==0) return;

    // perpendicular vector
    double px=-vy/length;
    double py=vx/length;

    // Arrow head lines go from end point
    // to points about 3/4 of the total arrow, extending sideways about 1/4
    // of the arrow length.


    QPointF arwp1 = mid + QPointF( (int)( (length/4.)*px ),
				   (int)( (length/4.)*py ) );
    QPointF arwp2 = mid - QPointF( (int)( (length/4.)*px ),
				   (int)( (length/4.)*py ) );

    p->setPen(pen());
    // Draw arrow head
    p->drawLine( end, arwp1 );
    p->drawLine( end, arwp2 );
    // Draw arrow line
    p->drawLine( start, end);
  }
};

#endif

/* finis */