public void paint(Graphics g) {
super.paint(g);
Graphics2D g2 = (Graphics2D) g;
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
g2.translate(getWidth() / 2 - size / 2, getHeight() / 2 - size / 2);
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Shape shape;
if (mode == ColorPicker.SAT || mode == ColorPicker.BRI) {
shape = new Ellipse2D.Float(0, 0, size, size);
} else {
Rectangle r = new Rectangle(0, 0, size, size);
shape = r;
}
if (hasFocus()) {
PaintUtils.paintFocus(g2, shape, 5);
}
if (!(shape instanceof Rectangle)) {
// paint a circular shadow
g2.translate(2, 2);
g2.setColor(new Color(0, 0, 0, 20));
g2.fill(new Ellipse2D.Float(-2, -2, size + 4, size + 4));
g2.setColor(new Color(0, 0, 0, 40));
g2.fill(new Ellipse2D.Float(-1, -1, size + 2, size + 2));
g2.setColor(new Color(0, 0, 0, 80));
g2.fill(new Ellipse2D.Float(0, 0, size, size));
g2.translate(-2, -2);
}
g2.drawImage(image, 0, 0, size, size, 0, 0, size, size, null);
if (shape instanceof Rectangle) {
Rectangle r = (Rectangle) shape;
PaintUtils.drawBevel(g2, r);
} else {
g2.setColor(new Color(0, 0, 0, 120));
g2.draw(shape);
}
g2.setColor(Color.white);
g2.setStroke(new BasicStroke(1));
g2.draw(new Ellipse2D.Float(point.x - 3, point.y - 3, 6, 6));
g2.setColor(Color.black);
g2.draw(new Ellipse2D.Float(point.x - 4, point.y - 4, 8, 8));
g.translate(-imagePadding.left, -imagePadding.top);
}
public void mousePressed(MouseEvent e) {
requestFocus();
Point p = e.getPoint();
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
p.translate(-(getWidth() / 2 - size / 2), -(getHeight() / 2 - size / 2));
if (mode == ColorPicker.BRI || mode == ColorPicker.SAT) {
// the two circular views:
double radius = ((double) size) / 2.0;
double x = p.getX() - size / 2.0;
double y = p.getY() - size / 2.0;
double r = Math.sqrt(x * x + y * y) / radius;
double theta = Math.atan2(y, x) / (Math.PI * 2.0);
if (r > 1) r = 1;
if (mode == ColorPicker.BRI) {
setHSB((float) (theta + .25f), (float) (r), bri);
} else {
setHSB((float) (theta + .25f), sat, (float) (r));
}
} else if (mode == ColorPicker.HUE) {
float s = ((float) p.x) / ((float) size);
float b = ((float) p.y) / ((float) size);
if (s < 0) s = 0;
if (s > 1) s = 1;
if (b < 0) b = 0;
if (b > 1) b = 1;
setHSB(hue, s, b);
} else {
int x2 = p.x * 255 / size;
int y2 = p.y * 255 / size;
if (x2 < 0) x2 = 0;
if (x2 > 255) x2 = 255;
if (y2 < 0) y2 = 0;
if (y2 > 255) y2 = 255;
if (mode == ColorPicker.RED) {
setRGB(red, x2, y2);
} else if (mode == ColorPicker.GREEN) {
setRGB(x2, green, y2);
} else {
setRGB(x2, y2, blue);
}
}
}
public void keyPressed(KeyEvent e) {
int dx = 0;
int dy = 0;
if (e.getKeyCode() == KeyEvent.VK_LEFT) {
dx = -1;
} else if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
dx = 1;
} else if (e.getKeyCode() == KeyEvent.VK_UP) {
dy = -1;
} else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
dy = 1;
}
int multiplier = 1;
if (e.isShiftDown() && e.isAltDown()) {
multiplier = 10;
} else if (e.isShiftDown() || e.isAltDown()) {
multiplier = 5;
}
if (dx != 0 || dy != 0) {
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
int offsetX = getWidth() / 2 - size / 2;
int offsetY = getHeight() / 2 - size / 2;
mouseListener.mousePressed(
new MouseEvent(
ColorPickerPanel.this,
MouseEvent.MOUSE_PRESSED,
System.currentTimeMillis(),
0,
point.x + multiplier * dx + offsetX,
point.y + multiplier * dy + offsetY,
1,
false));
}
}
/** Recalculates the (x,y) point used to indicate the selected color. */
private void regeneratePoint() {
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
if (mode == ColorPicker.HUE || mode == ColorPicker.SAT || mode == ColorPicker.BRI) {
if (mode == ColorPicker.HUE) {
point = new Point((int) (sat * size), (int) (bri * size));
} else if (mode == ColorPicker.SAT) {
double theta = hue * 2 * Math.PI - Math.PI / 2;
if (theta < 0) theta += 2 * Math.PI;
double r = bri * size / 2;
point =
new Point(
(int) (r * Math.cos(theta) + .5 + size / 2.0),
(int) (r * Math.sin(theta) + .5 + size / 2.0));
} else if (mode == ColorPicker.BRI) {
double theta = hue * 2 * Math.PI - Math.PI / 2;
if (theta < 0) theta += 2 * Math.PI;
double r = sat * size / 2;
point =
new Point(
(int) (r * Math.cos(theta) + .5 + size / 2.0),
(int) (r * Math.sin(theta) + .5 + size / 2.0));
}
} else if (mode == ColorPicker.RED) {
point = new Point((int) (green * size / 255f + .49f), (int) (blue * size / 255f + .49f));
} else if (mode == ColorPicker.GREEN) {
point = new Point((int) (red * size / 255f + .49f), (int) (blue * size / 255f + .49f));
} else if (mode == ColorPicker.BLUE) {
point = new Point((int) (red * size / 255f + .49f), (int) (green * size / 255f + .49f));
}
}
/** Regenerates the image. */
private synchronized void regenerateImage() {
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
if (mode == ColorPicker.BRI || mode == ColorPicker.SAT) {
float bri2 = this.bri;
float sat2 = this.sat;
float radius = ((float) size) / 2f;
float hue2;
float k = 1.2f; // the number of pixels to antialias
for (int y = 0; y < size; y++) {
float y2 = (y - size / 2f);
for (int x = 0; x < size; x++) {
float x2 = (x - size / 2f);
double theta = Math.atan2(y2, x2) - 3 * Math.PI / 2.0;
if (theta < 0) theta += 2 * Math.PI;
double r = Math.sqrt(x2 * x2 + y2 * y2);
if (r <= radius) {
if (mode == ColorPicker.BRI) {
hue2 = (float) (theta / (2 * Math.PI));
sat2 = (float) (r / radius);
} else { // SAT
hue2 = (float) (theta / (2 * Math.PI));
bri2 = (float) (r / radius);
}
row[x] = Color.HSBtoRGB(hue2, sat2, bri2);
if (r > radius - k) {
int alpha = (int) (255 - 255 * (r - radius + k) / k);
if (alpha < 0) alpha = 0;
if (alpha > 255) alpha = 255;
row[x] = row[x] & 0xffffff + (alpha << 24);
}
} else {
row[x] = 0x00000000;
}
}
image.getRaster().setDataElements(0, y, size, 1, row);
}
} else if (mode == ColorPicker.HUE) {
float hue2 = this.hue;
for (int y = 0; y < size; y++) {
float y2 = ((float) y) / ((float) size);
for (int x = 0; x < size; x++) {
float x2 = ((float) x) / ((float) size);
row[x] = Color.HSBtoRGB(hue2, x2, y2);
}
image.getRaster().setDataElements(0, y, image.getWidth(), 1, row);
}
} else { // mode is RED, GREEN, or BLUE
int red2 = red;
int green2 = green;
int blue2 = blue;
for (int y = 0; y < size; y++) {
float y2 = ((float) y) / ((float) size);
for (int x = 0; x < size; x++) {
float x2 = ((float) x) / ((float) size);
if (mode == ColorPicker.RED) {
green2 = (int) (x2 * 255 + .49);
blue2 = (int) (y2 * 255 + .49);
} else if (mode == ColorPicker.GREEN) {
red2 = (int) (x2 * 255 + .49);
blue2 = (int) (y2 * 255 + .49);
} else {
red2 = (int) (x2 * 255 + .49);
green2 = (int) (y2 * 255 + .49);
}
row[x] = 0xFF000000 + (red2 << 16) + (green2 << 8) + blue2;
}
image.getRaster().setDataElements(0, y, size, 1, row);
}
}
repaint();
}