Example #1
0
  public boolean dialogItemChanged(GenericDialog gd, AWTEvent e) {
    int width = imp.getWidth();
    int height = imp.getHeight();
    type = gd.getNextChoice();
    areaPerPoint = gd.getNextNumber();
    color = gd.getNextChoice();
    randomOffset = gd.getNextBoolean();

    double minArea = (width * height) / 50000.0;
    if (type.equals(types[1]) && minArea < 144.0) minArea = 144.0;
    else if (minArea < 16) minArea = 16.0;
    if (areaPerPoint / (pixelWidth * pixelHeight) < minArea) {
      String err = "\"Area per Point\" too small";
      if (gd.wasOKed()) IJ.error("Grid", err);
      else IJ.showStatus(err);
      return true;
    }
    double tileSize = Math.sqrt(areaPerPoint);
    tileWidth = tileSize / pixelWidth;
    tileHeight = tileSize / pixelHeight;
    if (randomOffset) {
      xstart = (int) (random.nextDouble() * tileWidth);
      ystart = (int) (random.nextDouble() * tileHeight);
    } else {
      xstart = (int) (tileWidth / 2.0 + 0.5);
      ystart = (int) (tileHeight / 2.0 + 0.5);
    }
    linesV = (int) ((width - xstart) / tileWidth) + 1;
    linesH = (int) ((height - ystart) / tileHeight) + 1;
    if (gd.invalidNumber()) return true;
    if (type.equals(types[0])) drawLines();
    else if (type.equals(types[1])) drawCrosses();
    else if (type.equals(types[2])) drawPoints();
    else showGrid(null);
    return true;
  }
 public int rand(int min, int max) {
   return min + (int) (r.nextDouble() * (max - min));
 }