/*
* 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:
* <http://www.opensourcephysics.org/>
*/
package org.opensourcephysics.display;
import org.opensourcephysics.controls.XML;
import org.opensourcephysics.controls.XMLControl;
/**
* A measured circle that implements Interactive.
*
* The InteractiveCircle class also demonstrates how to implement a simple XML loader.
*
* @author Wolfgang Christian
* @author Francisco Equembre
* @version 1.0
*/
public class InteractiveCircle extends MeasuredCircle implements Interactive {
boolean enableInteraction = true;
/**
* Constructs an InteractiveCircle with the given parameters.
*
* @param x
* @param y
*/
public InteractiveCircle(double x, double y) {
super(x, y);
}
/**
* Constructs an InteractiveCircle at the origin.
*/
public InteractiveCircle() {
this(0, 0);
}
/**
* Enables mouse interactions.
* @param _enableInteraction
*/
public void setEnabled(boolean _enableInteraction) {
enableInteraction = _enableInteraction;
}
public boolean isEnabled() {
return enableInteraction;
}
public boolean isInside(DrawingPanel panel, int xpix, int ypix) {
if(findInteractive(panel, xpix, ypix)==null) {
return false;
}
return true;
}
public Interactive findInteractive(DrawingPanel panel, int xpix, int ypix) {
if(!enableInteraction) {
return null;
}
int xcpix = panel.xToPix(x); // convert x to pixel units
int ycpix = panel.yToPix(y); // convert y to pixel units
if((Math.abs(xcpix-xpix)<=pixRadius)&&(Math.abs(ycpix-ypix)<=pixRadius)) {
return this;
}
return null;
}
public static XML.ObjectLoader getLoader() {
return new InteractiveCircleLoader();
}
/**
* A class to save and load InteractiveCircle data in an XMLControl.
*/
protected static class InteractiveCircleLoader extends CircleLoader {
/**
* Saves the InteractiveCircle's data in the xml control.
* @param control XMLControl
* @param obj Object
*/
public void saveObject(XMLControl control, Object obj) {
super.saveObject(control, obj);
InteractiveCircle circle = (InteractiveCircle) obj;
control.setValue("interaction enabled", circle.enableInteraction); //$NON-NLS-1$
control.setValue("measure enabled", circle.enableInteraction); //$NON-NLS-1$
}
/**
* Creates a default InteractiveCircle.
* @param control XMLControl
* @return Object
*/
public Object createObject(XMLControl control) {
return new InteractiveCircle();
}
/**
* Loads data from the xml control into the InteractiveCircle object.
* @param control XMLControl
* @param obj Object
* @return Object
*/
public Object loadObject(XMLControl control, Object obj) {
super.loadObject(control, obj);
InteractiveCircle circle = (InteractiveCircle) obj;
circle.enableInteraction = control.getBoolean("interaction enabled"); //$NON-NLS-1$
circle.enableMeasure = control.getBoolean("measure enabled"); //$NON-NLS-1$
return obj;
}
}
}
/*
* 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) 2007 The Open Source Physics project
* http://www.opensourcephysics.org
*/