/**
* 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();
}
}
/**
* 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();
}
/** Shows this picture on the canvas. */
public void draw() {
Canvas.getInstance().show(this);
}
/**
* 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();
}
/**
* 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();
}