public void changeColor() { // set initial color of top left quadrant if ((cxLoc < vLine.getStart().getX()) && (cyLoc < hLine.getStart().getY())) { ball.setColor(Color.cyan); } // set initial color of top right quadrant if ((cxLoc > vLine.getStart().getX()) && (cyLoc < hLine.getStart().getY())) { ball.setColor(Color.magenta); } // set initial color of bottom left quadrant if ((cxLoc < vLine.getStart().getX()) && (cyLoc > hLine.getStart().getY())) { ball.setColor(Color.yellow); } // set initial color of bottom right quadrant if ((cxLoc > vLine.getStart().getX()) && (cyLoc > hLine.getStart().getY())) { ball.setColor(Color.black); } }
public void resizeBall() { // if it grows set xLoc, YLoc and // increment, otherwise false. if (grow) { if (size < MAX_SIZE) { double xLoc = cxLoc + size / 2; double yLoc = cyLoc + size / 2; size += GROWTH; ball.setSize(size, size); cxLoc = xLoc - size / 2; cyLoc = yLoc - size / 2; ball.moveTo(cxLoc, cyLoc); } else { grow = false; } } else { // otherwise shrink if ((size <= MAX_SIZE) && (size > MIN_SIZE)) { double xLoc = cxLoc + size / 2; double yLoc = cyLoc + size / 2; size -= GROWTH; ball.setSize(size, size); cxLoc = xLoc - size / 2; cyLoc = yLoc - size / 2; ball.moveTo(cxLoc, cyLoc); } else { grow = true; } } // time delay to prevent lag pause(100 - speed); }
public void actionPerformed(ActionEvent evt) { // if start is pressed, activate run method if (evt.getActionCommand().equals("Start")) { start(); } // if stop is pressed, stop all of the balls // and change color. if (evt.getActionCommand().equals("Stop")) { stop(); changeColor(); } // if clear all is pressed, clear all of the balls // from the canvas. if (evt.getActionCommand().equals("Clear All")) { ball.removeFromCanvas(); } }
public void mousePressed(MouseEvent evt) { // Checks if the MouseEvent evt lies on the ball // and creates variable b_grabbed. b_grabbed = ball.contains(new Location(evt.getPoint())); }