1 files changed, 118 insertions, 0 deletions
diff --git a/PunchingBag/src/PicHelper/ImagePanel.java b/PunchingBag/src/PicHelper/ImagePanel.java
new file mode 100644
index 0000000..099fcb8
--- /dev/null
+++ b/PunchingBag/src/PicHelper/ImagePanel.java
@@ -0,0 +1,118 @@
+/*
+ * ImagePanel.java
+ *
+ * Copyright (C) 2007  Scott Carpenter (scottc at movingtofreedom dot org)
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see http://www.gnu.org/licenses/.
+ *
+ * Created on November 9, 2007, 4:07 PM
+ *
+ */
+
+package PicHelper;
+
+import java.io.*;
+import java.awt.*;
+import javax.swing.*;
+import javax.imageio.*;
+
+public class ImagePanel extends JPanel {
+
+	private Image image;
+	private Image scaledImage;
+	private int imageWidth = 0;
+	private int imageHeight = 0;
+
+	// private long paintCount = 0;
+
+	// constructor
+	public ImagePanel() {
+		super();
+	}
+
+	public void loadImage(String file) throws IOException {
+		loadImage(new File(file));
+	}
+	
+	public void loadImage(File file) throws IOException {
+		image = ImageIO.read(file);
+		// might be a situation where image isn't fully loaded, and
+		// should check for that before setting...
+		imageWidth = image.getWidth(this);
+		imageHeight = image.getHeight(this);
+		setScaledImage();
+	}
+
+	// e.g., containing frame might call this from formComponentResized
+	public void scaleImage() {
+		setScaledImage();
+	}
+
+	// override paintComponent
+	public void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		if (scaledImage != null) {
+			// System.out.println("ImagePanel paintComponent " + ++paintCount);
+			g.drawImage(scaledImage, 0, 0, this);
+		}
+	}
+
+	private void setScaledImage() {
+		if (image != null) {
+
+			// use floats so division below won't round
+			float iw = imageWidth;
+			float ih = imageHeight;
+			float pw = this.getWidth(); // panel width
+			float ph = this.getHeight(); // panel height
+
+			if (pw < iw || ph < ih) {
+
+				/*
+				 * compare some ratios and then decide which side of image to
+				 * anchor to panel and scale the other side (this is all based
+				 * on empirical observations and not at all grounded in theory)
+				 */
+
+				// System.out.println("pw/ph=" + pw/ph + ", iw/ih=" + iw/ih);
+
+				if ((pw / ph) > (iw / ih)) {
+					iw = -1;
+					ih = ph;
+				} else {
+					iw = pw;
+					ih = -1;
+				}
+
+				// prevent errors if panel is 0 wide or high
+				if (iw == 0) {
+					iw = -1;
+				}
+				if (ih == 0) {
+					ih = -1;
+				}
+
+				scaledImage = image.getScaledInstance(new Float(iw).intValue(),
+						new Float(ih).intValue(), Image.SCALE_DEFAULT);
+
+			} else {
+				scaledImage = image;
+			}
+
+			// System.out.println("iw = " + iw + ", ih = " + ih + ", pw = " + pw
+			// + ", ph = " + ph);
+		}
+	}
+
+}
+\ No newline at end of file