84 lines
2.5 KiB
Java
84 lines
2.5 KiB
Java
package com.bytezone.diskbrowser.gui;
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import java.awt.Color;
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import java.awt.Dimension;
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import java.awt.Graphics;
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import java.awt.Graphics2D;
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import java.awt.RenderingHints;
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import java.awt.geom.AffineTransform;
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import java.awt.image.BufferedImage;
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import javax.swing.JPanel;
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// -----------------------------------------------------------------------------------//
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public class ImagePanel extends JPanel
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// -----------------------------------------------------------------------------------//
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{
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private static final int BACKGROUND = 245;
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private BufferedImage image;
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private double scale = 1;
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private double userScale = .5;
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// ---------------------------------------------------------------------------------//
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public ImagePanel ()
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// ---------------------------------------------------------------------------------//
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{
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this.setBackground (new Color (BACKGROUND, BACKGROUND, BACKGROUND));
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}
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// ---------------------------------------------------------------------------------//
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public void setScale (double scale)
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// ---------------------------------------------------------------------------------//
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{
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this.userScale = scale;
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}
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// ---------------------------------------------------------------------------------//
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public void setImage (BufferedImage image)
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// ---------------------------------------------------------------------------------//
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{
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this.image = image;
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int width, height;
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if (image != null)
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{
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Graphics2D g2 = image.createGraphics ();
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g2.setRenderingHint (RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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width = image.getWidth ();
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height = image.getHeight ();
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}
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else
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width = height = 0;
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if (true)
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{
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if (width < 400 && width > 0)
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scale = (400 - 1) / width + 1;
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else
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scale = 1;
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if (scale > 4)
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scale = 4;
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}
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scale *= userScale;
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setPreferredSize (new Dimension ((int) (width * scale), (int) (height * scale)));
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repaint ();
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}
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// ---------------------------------------------------------------------------------//
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@Override
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public void paintComponent (Graphics g)
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// ---------------------------------------------------------------------------------//
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{
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super.paintComponent (g);
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if (image != null)
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{
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Graphics2D g2 = ((Graphics2D) g);
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g2.transform (AffineTransform.getScaleInstance (scale, scale));
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g2.drawImage (image, (int) ((getWidth () - image.getWidth () * scale) / 2 / scale), 4, this);
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}
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}
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} |