1 /*******************************************************************************
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2 * Copyright (c) 2007, 2011 Association for Decentralized Information Management in
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.utils.ui.gfx;
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14 import java.awt.Color;
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15 import java.awt.Font;
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16 import java.awt.FontMetrics;
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17 import java.awt.Graphics2D;
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18 import java.awt.RenderingHints;
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19 import java.awt.geom.Rectangle2D;
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20 import java.awt.image.BufferedImage;
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21 import java.awt.image.Raster;
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23 import org.eclipse.jface.resource.ImageDescriptor;
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24 import org.eclipse.swt.graphics.ImageData;
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25 import org.eclipse.swt.graphics.PaletteData;
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26 import org.simantics.utils.ObjectUtils;
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28 public class TextImageDescriptor extends ImageDescriptor {
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30 static final PaletteData _RGB = new PaletteData(0x00ff0000, 0x0000ff00, 0x000000ff);
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33 public int width, height;
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35 public int fontSize;
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39 private transient int hash;
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41 public TextImageDescriptor(String text, int width, int height,
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42 String font, int fontSize,
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43 int style, int rgb) {
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46 this.height = height;
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48 this.fontSize = fontSize;
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52 hash = text.hashCode() + 3*width + 5*height + 7*font.hashCode() + 11*fontSize + 13*style + 17*rgb;
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56 public ImageData getImageData() {
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57 ImageData id = new ImageData(width, height, 24, _RGB);
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58 BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
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59 Graphics2D g = (Graphics2D) bi.getGraphics();
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60 g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
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61 Font f = new Font(font, style, fontSize);
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63 Color c = new Color(rgb);
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65 FontMetrics fm = g.getFontMetrics(f);
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66 Rectangle2D rect = fm.getStringBounds(text, g);
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67 g.drawString(text, (float) ((width-rect.getWidth())/2), (float) ( (height/2) + (height-rect.getHeight())/2) );
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70 Raster alpha = bi.getAlphaRaster();
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71 for (int x=0; x<width; x++) {
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72 for (int y=0; y<height; y++) {
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73 int a = alpha.getSample(x, y, 0);
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74 int rgb = bi.getRGB(x, y);
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75 id.setAlpha(x, y, a);
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76 id.setPixel(x, y, rgb);
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84 public int hashCode() {
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89 public boolean equals(Object obj) {
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90 if (obj instanceof TextImageDescriptor==false) return false;
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91 TextImageDescriptor o = (TextImageDescriptor) obj;
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92 if ( !ObjectUtils.objectEquals(text, o.text) ) return false;
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93 if ( !ObjectUtils.objectEquals(font, o.font) ) return false;
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94 return width==o.width && height==o.height && fontSize==o.fontSize && style==o.style && rgb==o.rgb;
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