/*
* Open Source Physics software is free software as described near the bottom of this code file.
*
* For additional information and documentation on Open Source Physics please see:
* <https://www.compadre.org/osp/>
*/
package org.opensourcephysics.display;
import java.awt.geom.GeneralPath;
import java.awt.geom.PathIterator;
import org.opensourcephysics.controls.XMLControl;
import org.opensourcephysics.controls.XMLLoader;
/**
* A class that saves and loads a GeneralPath in an XMLControl.
*/
public class GeneralPathLoader extends XMLLoader {
public void saveObject(XMLControl control, Object obj) {
GeneralPath shape = (GeneralPath) obj;
// iterator with line flatness better than 0.001
PathIterator it = shape.getPathIterator(null, 0.001);
control.setValue("winding rule", it.getWindingRule()); //$NON-NLS-1$
control.setValue("segments", savePathSegments(it)); //$NON-NLS-1$
}
public Object createObject(XMLControl control) {
return new GeneralPath(); // default shape is a GeneralPath
}
/**
* Saves the path segments in a string.
*
* @param it PathIterator
* @return String
*/
String savePathSegments(PathIterator it) {
StringBuffer sb = new StringBuffer();
float[] coord = new float[6];
double x1 = 0, y1 = 0;
while(!it.isDone()) {
switch(it.currentSegment(coord)) {
case PathIterator.SEG_LINETO :
x1 = coord[0];
y1 = coord[1];
sb.append("<LINETO "+x1+" "+y1+">"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
break;
case PathIterator.SEG_MOVETO :
x1 = coord[0];
y1 = coord[1];
sb.append("<MOVETO "+x1+" "+y1+">"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
break;
case PathIterator.SEG_CLOSE :
sb.append("<CLOSE>"); //$NON-NLS-1$
break;
default :
System.out.println("Segment Type not supported. Type="+it.currentSegment(coord)); //$NON-NLS-1$
}
it.next();
}
return sb.toString();
}
/**
* Loads the path with the segments from the given string.
*
* @param path GeneralPath
* @param segments String
*/
void loadPathSegments(GeneralPath path, String segments) {
String[] segs = segments.split(">"); //$NON-NLS-1$
for(int i = 0, n = segs.length; i<n; i++) {
if(segs[i].startsWith("<LINETO ")) { //$NON-NLS-1$
String[] vals = segs[i].split(" "); //$NON-NLS-1$
path.lineTo(Float.parseFloat(vals[1]), Float.parseFloat(vals[2]));
} else if(segs[i].startsWith("<MOVETO ")) { //$NON-NLS-1$
String[] vals = segs[i].split(" "); //$NON-NLS-1$
path.moveTo(Float.parseFloat(vals[1]), Float.parseFloat(vals[2]));
} else if(segs[i].startsWith("<CLOSE")) { //$NON-NLS-1$
path.closePath();
}
}
}
public Object loadObject(XMLControl control, Object obj) {
GeneralPath path = (GeneralPath) obj;
path.reset();
path.setWindingRule(control.getInt("winding rule")); //$NON-NLS-1$
loadPathSegments(path, control.getString("segments")); //$NON-NLS-1$
return path;
}
}
/*
* Open Source Physics software is free software; you can redistribute
* it and/or modify it under the terms of the GNU General Public License (GPL) as
* published by the Free Software Foundation; either version 2 of the License,
* or(at your option) any later version.
* Code that uses any portion of the code in the org.opensourcephysics package
* or any subpackage (subdirectory) of this package must must also be be released
* under the GNU GPL license.
*
* This software 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 this; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
* or view the license online at http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2019 The Open Source Physics project
* https://www.compadre.org/osp
*/
