1 package aurelienribon.utils.swing; 2 3 import java.awt.Color; 4 import java.awt.Graphics; 5 import java.awt.Graphics2D; 6 import java.awt.Rectangle; 7 import java.awt.TexturePaint; 8 import java.awt.image.BufferedImage; 9 import java.io.File; 10 import java.io.IOException; 11 import java.net.URL; 12 import java.util.logging.Level; 13 import java.util.logging.Logger; 14 import javax.imageio.ImageIO; 15 import javax.swing.JPanel; 16 17 /** 18 * @author Aurelien Ribon | http://www.aurelienribon.com 19 */ 20 public class ImagePanel extends JPanel { 21 private BufferedImage background; 22 private BufferedImage image; 23 private boolean useRegion; 24 private int x, y, width, height; 25 26 public void setBackground(URL bgURL) { 27 try { 28 background = ImageIO.read(bgURL); 29 } catch (IOException ex) { 30 } 31 } 32 33 public void clearImage() { 34 image = null; 35 repaint(); 36 } 37 38 public void setImage(BufferedImage img) { 39 image = img; 40 repaint(); 41 } 42 43 public void setImage(File img) { 44 setImage(img, 0, 0, 0, 0); 45 useRegion = false; 46 } 47 48 public void setImage(URL imgUrl) { 49 setImage(imgUrl, 0, 0, 0, 0); 50 useRegion = false; 51 } 52 53 public void setImage(File img, int x, int y, int width, int height) { 54 this.x = x; 55 this.y = y; 56 this.width = width; 57 this.height = height; 58 useRegion = true; 59 60 try { 61 image = img != null ? ImageIO.read(img) : null; 62 repaint(); 63 } catch (IOException ex) { 64 Logger.getLogger(ImagePanel.class.getName()).log(Level.SEVERE, null, ex); 65 } 66 } 67 68 public void setImage(URL imgUrl, int x, int y, int width, int height) { 69 this.x = x; 70 this.y = y; 71 this.width = width; 72 this.height = height; 73 useRegion = true; 74 75 try { 76 image = imgUrl != null ? ImageIO.read(imgUrl) : null; 77 repaint(); 78 } catch (IOException ex) { 79 Logger.getLogger(ImagePanel.class.getName()).log(Level.SEVERE, null, ex); 80 } 81 } 82 83 @Override 84 protected void paintComponent(Graphics g) { 85 Graphics2D gg = (Graphics2D)g; 86 gg.setColor(Color.LIGHT_GRAY); 87 gg.fillRect(0, 0, getWidth(), getHeight()); 88 89 if (background != null) { 90 TexturePaint paint = new TexturePaint(background, new Rectangle(0, 0, background.getWidth(), background.getHeight())); 91 gg.setPaint(paint); 92 gg.fillRect(0, 0, getWidth(), getHeight()); 93 gg.setPaint(null); 94 } 95 96 if (image != null && !useRegion) { 97 float panelRatio = (float)getWidth() / (float)getHeight(); 98 float imgRatio = (float)image.getWidth() / (float)image.getHeight(); 99 100 if (imgRatio > panelRatio) { 101 float tw = (float)getWidth(); 102 float th = (float)getWidth() / imgRatio; 103 gg.drawImage(image, 0, (int)(getHeight()/2 - th/2), (int) tw, (int) th, null); 104 } else { 105 float tw = (float)getHeight() * imgRatio; 106 float th = (float)getHeight(); 107 gg.drawImage(image, (int)((float)getWidth()/2 - tw/2), 0, (int) tw, (int) th, null); 108 } 109 110 } else if (image != null && useRegion) { 111 float panelRatio = (float)getWidth() / (float)getHeight(); 112 float imgRatio = (float)width / (float)height; 113 114 if (imgRatio > panelRatio) { 115 int tw = getWidth(); 116 int th = (int) (getWidth() / imgRatio); 117 int tx = 0; 118 int ty = getHeight()/2 - th/2; 119 gg.drawImage(image, tx, ty, tx + tw, ty + th, x, y, x + width, y + width, null); 120 } else { 121 int tw = (int) (getHeight() * imgRatio); 122 int th = getHeight(); 123 int tx = getWidth()/2 - tw/2; 124 int ty = 0; 125 gg.drawImage(image, tx, ty, tx + tw, ty + th, x, y, x + width, y + width, null); 126 } 127 } 128 } 129 } 130
