f@0: /*
f@0: XYPad - a haptic xy-pad that uses the jHapticGUI library
f@0: 
f@0: Copyright (C) 2015  Queen Mary University of London (http://depic.eecs.qmul.ac.uk/)
f@0: 
f@0: This program is free software: you can redistribute it and/or modify
f@0: it under the terms of the GNU General Public License as published by
f@0: the Free Software Foundation, either version 3 of the License, or
f@0: (at your option) any later version.
f@0: 
f@0: This program is distributed in the hope that it will be useful,
f@0: but WITHOUT ANY WARRANTY; without even the implied warranty of
f@0: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
f@0: GNU General Public License for more details.
f@0: 
f@0: You should have received a copy of the GNU General Public License
f@0: along with this program.  If not, see <http://www.gnu.org/licenses/>.
f@0: */
f@0: package uk.ac.qmul.eecs.depic.jhapticgui.examples;
f@0: 
f@0: import java.awt.BasicStroke;
f@0: import java.awt.Color;
f@0: import java.awt.Dimension;
f@0: import java.awt.Graphics;
f@0: import java.awt.Graphics2D;
f@0: import java.awt.RenderingHints;
f@0: import java.awt.Stroke;
f@0: 
f@0: import javax.swing.JPanel;
f@0: 
f@0: 
f@0: /**
f@0:  * 
f@0:  * A Panel displaying an xy cursor 
f@0:  * 
f@0:  * @author Fiore Martin
f@0:  *
f@0:  */
f@0: public class XYPanel extends JPanel {
f@0: 	private static final long serialVersionUID = 1L;
f@0: 	private static int CURSOR_SIZE = 20;
f@0: 	private static int HALF_CURSOR_SIZE = CURSOR_SIZE/2;
f@0: 	private static Stroke LINE_STROKE = new BasicStroke(2);
f@0: 	private float cursorX;
f@0: 	private float cursorY;
f@0: 	
f@0: 	/**
f@0: 	 * Creates a new panel with the cursor placed at the centre
f@0: 	 */
f@0: 	public XYPanel() {
f@0: 		cursorX = 0.5f;
f@0: 		cursorY = 0.5f;
f@0: 	}
f@0: 
f@0: 	/**
f@0: 	 * {@inheritDoc}
f@0: 	 */
f@0: 	@Override
f@0: 	public void paintComponent(Graphics g){
f@0: 		super.paintComponent(g);
f@0: 		
f@0: 		final Graphics2D g2 = (Graphics2D)g;
f@0: 		final Dimension size = getSize();
f@0: 		
f@0: 		/* cursorX and cursorY range from 0 to 1, so multiply them respectively * 
f@0: 		 * by the width and height of this panel to get the drawing position    */
f@0: 		int x = (int)(cursorX * size.width);
f@0: 		int y = (int)(size.height - (cursorY * size.height));
f@0: 		
f@0: 		g.setColor(Color.ORANGE);
f@0: 		
f@0: 		/* draw the x and y lines */
f@0: 		g2.setStroke(LINE_STROKE);
f@0: 		g2.drawLine(0, y, size.width, y);
f@0: 		g2.drawLine(x, 0, x, size.height);
f@0: 		
f@0: 		g2.setRenderingHint(
f@0: 			    RenderingHints.KEY_ANTIALIASING,
f@0: 			    RenderingHints.VALUE_ANTIALIAS_ON);
f@0: 		
f@0: 		/* draw the cursor */
f@0: 		g2.fillOval(
f@0: 				x - HALF_CURSOR_SIZE, 
f@0: 				y - HALF_CURSOR_SIZE, 
f@0: 				CURSOR_SIZE, 
f@0: 				CURSOR_SIZE
f@0: 			);
f@0: 		
f@0: 	}
f@0: 	
f@0: 	/**
f@0: 	 * Sets the cursor position, the coordinates must be passed in normalized form and get scaled by the height and width 
f@0: 	 * of the panel. so for example to place the cursor at the centre of the screen, the coordinates should be both 0.5.  
f@0: 	 * 
f@0: 	 * @param x the x coordinate in normalized form (ranging from 0 to 1) 
f@0: 	 * @param y the y coordinate in normalized form (ranging from 0 to 1)
f@0: 	 */
f@0: 	public void setXY(float x, float y){
f@0: 		cursorX = x;
f@0: 		cursorY = y;
f@0: 		
f@0: 		repaint();
f@0: 	}
f@0: }