ScalingGridPanel.java
package ac.essex.ooechs.imaging.commons.util.panels;
import ac.essex.ooechs.imaging.commons.util.Region;
import ac.essex.ooechs.imaging.commons.grids.Grid;
import java.awt.*;
import java.awt.event.*;
/**
* <p/>
* This program 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,
* provided that any use properly credits the author.
* This program 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 at http://www.gnu.org
* </p>
*
* @author Olly Oechsle, University of Essex, Date: 23-Oct-2006
* @version 1.0
*/
public class ScalingGridPanel extends ScalingImagePanel {
Grid grid;
public int x = 0;
public int y = 0;
public ScalingGridPanel(Grid g) {
this.grid = g;
addMouseMotionListener(new MouseMotionAdapter() {
public void mouseMoved(MouseEvent e) {
int cellWidth = getWidth() / grid.getTotalHorizontalLines();
int cellHeight = getHeight() / grid.getTotalVerticalLines();
int gridX = (e.getX() / cellWidth);
int gridY = (e.getY() / cellHeight);
if (x != gridX || y != gridY) {
x = gridX;
y = gridY;
repaint();
}
}
});
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Region r = new Region(0, 0, getWidth(), getHeight());
g.setColor(Color.WHITE);
grid.draw(g, r);
int cellWidth = getWidth() / grid.getTotalHorizontalLines();
int cellHeight = getHeight() / grid.getTotalVerticalLines();
// drawPixels a black box
g.setColor(Color.BLACK);
g.drawRect(x * cellWidth, y * cellHeight, cellWidth, cellHeight);
// and display coordinates
double xPos = (x + 0.1) * cellWidth;
double yPos = (y + 0.7) * cellHeight;
g.drawString(x + ", " + y, (int) xPos, (int) yPos);
}
}