ImageRegion.java

package edu.stanford.hci.r3.paper.regions;

import java.awt.Dimension;
import java.awt.geom.Rectangle2D;
import java.io.File;

import edu.stanford.hci.r3.paper.Region;
import edu.stanford.hci.r3.render.RegionRenderer;
import edu.stanford.hci.r3.render.regions.ImageRenderer;
import edu.stanford.hci.r3.units.Pixels;
import edu.stanford.hci.r3.units.Units;
import edu.stanford.hci.r3.util.graphics.ImageUtils;

public class ImageRegion extends Region {

        private File imageFile;

        private Rectangle2D imageRect;

        private double pixelsPerInch;

        public ImageRegion(String name, File imgFile, Units originX, Units originY) {
                this(name, imgFile, originX, originY, new Pixels(1, 72));
        }

        public ImageRegion(String name, File imgFile, Units originX, Units originY,
                        Pixels pixelConversion) {
                super(name, originX); // initialize units

                // figure out the shape of this image, by loading it and determining the dimensions
                final Dimension dimension = ImageUtils.readSize(imgFile);

                // infer the physical size of the photo from this value
                pixelsPerInch = pixelConversion.getPixelsPerInch();

                imageFile = imgFile;

                // my units (actually, just originX, as we passed it in earlier)
                final Units u = getUnits();

                // create a Rectangle from origin X, Y, with the correct dimensions (72 pixels per inch)
                final Rectangle2D.Double rect = new Rectangle2D.Double(originX.getValue(), originY
                                .getValueIn(u), new Pixels(dimension.getWidth(), pixelsPerInch).getValueIn(u),
                                new Pixels(dimension.getHeight(), pixelsPerInch).getValueIn(u));
                // System.out.println(rect);
                setShape(rect);
                imageRect = rect;

                setName("An Image Region: " + imgFile.getName());
        }

        public File getFile() {
                return imageFile;
        }

        public double getHeightVal() {
                return imageRect.getHeight() * scaleY;
        }

        public double getPixelsPerInch() {
                return pixelsPerInch;
        }

        public RegionRenderer getRenderer() {
                return new ImageRenderer(this);
        }

        public double getWidthVal() {
                return imageRect.getWidth() * scaleX;
        }

        public double getX() {
                return imageRect.getX();
        }

        public double getY() {
                return imageRect.getY();
        }

        public String toString() {
                return "Image: {" + getX() + ", " + getY() + ", " + getWidthVal() + ", " + getHeightVal()
                                + "} in " + getUnits().getUnitName();
        }
}

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