/** paints the Spinner */
public void paint(Graphics g) {
int start_angle = 90;
int done_angle = (int) (percentDone * 360);
g.setColor(getBackground());
g.fillArc(3, 3, getSize().width - 8, getSize().height - 8, 0, 360);
g.setColor(getForeground());
g.fillArc(3, 3, getSize().width - 8, getSize().height - 8, start_angle, done_angle);
g.setColor(Color.black);
g.drawArc(3, 3, getSize().width - 8, getSize().height - 8, 0, 360);
}
/**
* Draws a "solid" arc which will look either like a pie wedge or Pac-man.<br>
* A FILLED ARC is a "piece" of a SOLID OVAL.<br>
* The first 5 parameters (g and 4 ints) are the same as drawOval.<br>
* There are 2 additional parameters for the starting degree value and finishing degree of the
* arc. <br>
* 0 degrees is at the 12:00 position and the degrees progress in a CLOCKWISE fashion. <br>
* (90 degrees is at 3:00, 180 degrees is at 6:00, 270 degrees is at 9:00, 360 degrees is back at
* 12:00).
*/
public static void fillArc(
Graphics g, int centerX, int centerY, int hRadius, int vRadius, int start, int finish) {
int hDiameter = 2 * hRadius;
int vDiameter = 2 * vRadius;
if (finish < start) finish += 360;
int newStart = 90 - start; // shifts starting position from 3:00 to 12:00
int newFinish =
start
- finish; // as oppose to finish-start. Subtracting backwards changes from
// counter-clockwise to clockwise.
g.fillArc(centerX - hRadius, centerY - vRadius, hDiameter, vDiameter, newStart, newFinish);
}
