示例#1
0
 /**
  * Sets the color of a pixel.
  *
  * @param x the x-coordinate (column) of the pixel
  * @param y the y-coordinate (row) of the pixel
  * @param the color of the pixel at the given row and column
  */
 public void setColorAt(int x, int y, Color color) {
   if (image == null || x < 0 || x >= image.getWidth() || y < 0 || y >= image.getHeight()) {
     throw new IndexOutOfBoundsException("(" + x + "," + y + ")");
   } else {
     image.setRGB(
         x,
         y,
         ((int) color.getRed()) * 65536 + ((int) color.getGreen()) * 256 + (int) color.getBlue());
     Canvas.getInstance().repaint();
   }
 }
示例#2
0
  /**
   * Loads a new image from a given file or URL.
   *
   * @param source the filename or URL
   */
  public void load(String source) {
    try {
      this.source = source;
      if (source.startsWith("http://")) image = ImageIO.read(new URL(source).openStream());
      else image = ImageIO.read(new File(source));

      label.setIcon(new ImageIcon(image));
      label.setText("");
    } catch (Exception ex) {
      image = null;
      label.setIcon(null);
      ex.printStackTrace();
    }
    Canvas.getInstance().repaint();
  }
示例#3
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 /** Shows this picture on the canvas. */
 public void draw() {
   Canvas.getInstance().show(this);
 }
示例#4
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 /**
  * Resizes this picture both horizontally and vertically.
  *
  * @param dw the amount by which to resize the width on each side
  * @param dw the amount by which to resize the height on each side
  */
 public void grow(double dw, double dh) {
   xGrow += dw;
   yGrow += dh;
   Canvas.getInstance().repaint();
 }
示例#5
0
 /**
  * Moves this picture by a given amount.
  *
  * @param dx the amount by which to move in x-direction
  * @param dy the amount by which to move in y-direction
  */
 public void translate(double dx, double dy) {
   x += dx;
   y += dy;
   Canvas.getInstance().repaint();
 }