4 import javax.swing.*;
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6 public class ScaleCanvas extends JPanel {
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10 public static final int HEIGHT = 30;
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12 boolean paintFlag = false;
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14 protected AlignViewport av;
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16 public ScaleCanvas(AlignViewport av) {
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20 public void paintComponent(Graphics g)
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22 drawScale(g, av.getStartRes(), av.getEndRes(), getWidth());
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25 // scalewidth will normally be screenwidth,
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26 public void drawScale(Graphics gg, int startx, int endx, int scaleWidth)
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29 int charWidth = av.getCharWidth();
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31 gg.setFont(av.getFont());
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33 //Fill in the background
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35 gg.setColor(Color.white);
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36 gg.fillRect(0,0,scaleWidth, HEIGHT);
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38 int resWidth = endx - startx + 1;
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40 // We want roughly one tick every 50 pixels
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42 double rough = scaleWidth/50.0;
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44 double roughtick = resWidth/rough;
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46 int digits = (int)(Math.log(roughtick)/Math.log(10));
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47 int num = (int)(roughtick/Math.pow(10,digits));
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49 if (Math.abs(10-num) < 3)
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51 else if (Math.abs(5-num) >= 2)
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56 //System.out.println("Dig " + digits + " " + rough + " " + roughtick + " " + getWidth() + " " + num);
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58 int space = (int)(num * Math.pow(10,digits));
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62 gg.setColor(Color.black);
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64 int scalestartx = startx - startx%space + space;
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67 //Fill the selected columns
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68 ColumnSelection cs = av.getColumnSelection();
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69 int width = charWidth;
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73 gg.setColor(new Color(220,0,0));
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74 for (int i=0; i<cs.size(); i++) {
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75 int sel = cs.columnAt(i);
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76 // System.out.println("Selection = " + sel);
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77 if ( sel >= startx && sel <= endx) {
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79 gg.fillRect((sel-startx)*charWidth,0,width,getHeight());
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83 // Draw the scale numbers
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84 gg.setColor(Color.black);
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87 for (int i=scalestartx;i < endx;i+= space) {
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89 String string = String.valueOf(i);
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91 gg.drawString(string,(i-startx-1)*charWidth,15);
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92 gg.drawLine( (int)((i-startx-1)*charWidth +charWidth/2), 17, (int)((i-startx-1)*charWidth +charWidth/2), 24);
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99 public Dimension getMinimumSize() {
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100 return new Dimension(500,HEIGHT);
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103 public Dimension getPreferredSize() {
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104 return getMinimumSize();
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