| Methods Summary |
|---|
| public double | angleDragged(java.awt.event.MouseEvent e)
double newAngle = calculateAngle(e);
double change = (lastAngle - newAngle) / Math.PI;
if (Math.abs(change) > 0.5) { // Handle crossing origin.
if (change < 0.0) {
change += 1.0;
} else {
change -= 1.0;
}
}
lastAngle = newAngle;
return change;
|
| protected double | calculateAngle(java.awt.event.MouseEvent e)
int x = e.getX() - ((JComponent)e.getSource()).getWidth() / 2;
int y = -e.getY() + ((JComponent)e.getSource()).getHeight() / 2;
if (x == 0) { // Handle case where math would blow up.
if (y == 0) {
return lastAngle; // Can't tell...
}
if (y > 0) {
return Math.PI / 2;
}
return -Math.PI / 2;
}
return Math.atan((double)y / (double)x);
|
| public static javax.swing.plaf.ComponentUI | createUI(javax.swing.JComponent c) // Used to track mouse drags.
return new BasicJogShuttleUI();
|
| private void | drawFingerSlot(java.awt.Graphics g, javax.swing.JComponent c, int value, int width, int height, int valuePerRevolution, int size, double xradius, double yradius)
int currentPosition = value % valuePerRevolution;
// Obtain the current angle in radians.
double angle = ((double)currentPosition / valuePerRevolution) *
java.lang.Math.PI * 2;
// Obtain the X and Y coordinates of the finger slot, with the
// minimum value at twelve o'clock.
angle -= (java.lang.Math.PI / 2);
int xPosition = (int) (xradius * java.lang.Math.sin(angle));
int yPosition = (int) (yradius * java.lang.Math.cos(angle));
xPosition = (width / 2) - xPosition;
yPosition = (height / 2) + yPosition;
// Draw the finger slot with a crescent shadow on the top left.
g.setColor(Color.darkGray);
g.fillOval(xPosition-(size/2), yPosition-(size/2), size, size);
g.setColor(Color.lightGray);
g.fillOval(xPosition-(size/2) + 1, yPosition - (size/2) + 1,
size - 1, size - 1);
|
| public void | installUI(javax.swing.JComponent c)
JogShuttle shuttle = (JogShuttle)c;
shuttle.addMouseListener(this);
shuttle.addMouseMotionListener(this);
|
| public void | mouseClicked(java.awt.event.MouseEvent e)
|
| public void | mouseDragged(java.awt.event.MouseEvent e)
JogShuttle theShuttle = (JogShuttle)e.getComponent();
theShuttle.setValue(theShuttle.getValue() +
(int)(angleDragged(e) * theShuttle.getValuePerRevolution()));
|
| public void | mouseEntered(java.awt.event.MouseEvent e)
|
| public void | mouseExited(java.awt.event.MouseEvent e)
|
| public void | mouseMoved(java.awt.event.MouseEvent e)
|
| public void | mousePressed(java.awt.event.MouseEvent e) lastAngle = calculateAngle(e);
|
| public void | mouseReleased(java.awt.event.MouseEvent e)
|
| public void | paint(java.awt.Graphics g, javax.swing.JComponent c)
// We don't want to paint inside the insets or borders.
Insets insets = c.getInsets();
g.translate(insets.left, insets.top);
int width = c.getWidth() - insets.left - insets.right;
int height = c.getHeight() - insets.top - insets.bottom;
// Draw the outside circle.
g.setColor(c.getForeground());
g.fillOval(0, 0, width, height);
Insets d = ((JogShuttle)c).getDialInsets();
int value = ((JogShuttle)c).getValue();
int valuePerRevolution = ((JogShuttle)c).getValuePerRevolution();
// Draw the edge of the dial.
g.setColor(Color.darkGray);
g.fillOval(d.left, d.top, width-(d.right*2), height-(d.bottom*2));
// Draw the inside of the dial.
g.setColor(Color.gray);
g.fillOval(d.left + KNOB_DISPLACEMENT,
d.top + KNOB_DISPLACEMENT,
width - (d.right + d.left) - KNOB_DISPLACEMENT * 2,
height - (d.bottom + d.top) - KNOB_DISPLACEMENT * 2);
// Draw the finger slot.
drawFingerSlot(g, c, value, width, height, valuePerRevolution,
FINGER_SLOT_DISPLACEMENT - 1,
(double)(width/2) - d.right - FINGER_SLOT_DISPLACEMENT,
(double)(height/2) - d.bottom - FINGER_SLOT_DISPLACEMENT);
g.translate(-insets.left, -insets.top);
|
| public void | uninstallUI(javax.swing.JComponent c)
JogShuttle shuttle = (JogShuttle)c;
shuttle.removeMouseListener(this);
shuttle.removeMouseMotionListener(this);
|
