/*
* 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/>
*/
/*
* The org.opensourcephysics.media.core package defines the Open Source Physics
* media framework for working with video and other media.
*
* Copyright (c) 2014 Douglas Brown and Wolfgang Christian.
*
* This 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.
*
* 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
*
* For additional information and documentation on Open Source Physics,
* please see <http://www.opensourcephysics.org/>.
*/
package org.opensourcephysics.media.core;
import java.awt.BasicStroke;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.geom.Line2D;
import org.opensourcephysics.display.DrawingPanel;
import org.opensourcephysics.display.Interactive;
/**
* This is a TShape that draws a line.
*
* @author Douglas Brown
* @version 1.0
*/
public class TLine extends TShape {
// instance fields
protected Line2D line = new Line2D.Double();
protected TPoint end1 = new LineEnd();
protected TPoint end2 = new LineEnd();
protected Rectangle end1Rect = new Rectangle(0, 0, 8, 8);
protected Rectangle end2Rect = new Rectangle(0, 0, 8, 8);
/**
* Constructs a default TLine with end points at (0, 0).
*/
public TLine() {
/** empty block */
}
/**
* Constructs a TLine with specified end points.
*
* @param x1 x position of end 1
* @param y1 y position of end 1
* @param x2 x position of end 2
* @param y2 y position of end 2
*/
public TLine(double x1, double y1, double x2, double y2) {
end1.setXY(x1, y1);
end2.setXY(x2, y2);
}
/**
* Gets end 1.
*
* @return end 1
*/
public TPoint getEnd1() {
return end1;
}
/**
* Gets end 2.
*
* @return end 2
*/
public TPoint getEnd2() {
return end2;
}
/**
* Overrides TShape setStroke method.
*
* @param stroke the desired stroke
*/
public void setStroke(BasicStroke stroke) {
if(stroke!=null) {
this.stroke = stroke;
}
}
/**
* Sets the x and y positions in imagespace.
*
* @param x the x position
* @param y the y position
*/
public void setXY(double x, double y) {
double dx = x-getX();
double dy = y-getY();
end1.translate(dx, dy);
end2.translate(dx, dy);
}
/**
* Returns the interactive drawable object at the specified pixel
* position.
*
* @param panel the drawing panel
* @param xpix the x pixel position on the panel
* @param ypix the y pixel position on the panel
* @return the interactive drawable object
*/
public Interactive findInteractive(DrawingPanel panel, int xpix, int ypix) {
if(end1Rect.contains(xpix, ypix)) {
return end1;
}
if(end2Rect.contains(xpix, ypix)) {
return end2;
}
setHitRectCenter(xpix, ypix);
if(line.intersects(hitRect)) {
return this;
}
return null;
}
//________________________ protected methods ________________________
/**
* Gets the shape to be filled in the draw method.
*
* @param vidPanel the video panel
* @return the line shape
*/
protected Shape getShape(VideoPanel vidPanel) {
this.center(end1, end2);
Point p1 = end1.getScreenPosition(vidPanel);
Point p2 = end2.getScreenPosition(vidPanel);
line.setLine(p1, p2);
end1Rect.setLocation(p1.x-4, p1.y-4);
end2Rect.setLocation(p2.x-4, p2.y-4);
return stroke.createStrokedShape(line);
}
//_________________________ inner End classes _________________________
class LineEnd extends TPoint {
/**
* Overrides TPoint getBounds method
*
* @param vidPanel the video panel
* @return the bounding rectangle
*/
public Rectangle getBounds(VideoPanel vidPanel) {
return TLine.this.getBounds(vidPanel);
}
}
}
/*
* 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
*/