private void checkBoxMouseClicked(MouseEvent event, int index) {
CheckBox cb = checkBoxArray[index];
int y = (int) cb.getLayoutY() + radius;
if (cb.isSelected() && index < 5) {
// Reader selected
Ball b = new Ball(minX, maxX, minCsX, maxCsX, y, balColor1, "reader");
ballArray[index] = b;
Thread t = new Thread(new BallRunnable(b, readWrite));
threadArray[index] = t;
circleArray[index].setVisible(true);
t.start();
} else if (cb.isSelected() && index >= 5) {
// Writer selected
Ball b = new Ball(minX, maxX, minCsX, maxCsX, y, balColor2, "writer");
ballArray[index] = b;
Thread t = new Thread(new BallRunnable(b, readWrite));
threadArray[index] = t;
circleArray[index].setVisible(true);
t.start();
} else {
threadArray[index].interrupt();
threadArray[index] = null;
ballArray[index] = null;
circleArray[index].setVisible(false);
circleArray[index].setCenterX(minX);
}
}
@Override
public void start(Stage primaryStage) {
// Create the scene
Group root = new Group();
Scene scene = new Scene(root, maxX, maxY);
// Check boxes
for (int i = 0; i < checkBoxArray.length; i++) {
String text;
if (i < 5) {
// Check box for reader
text = "Reader" + (i + 1);
} else {
// Check box for writer
text = "Writer" + (i - 4);
}
final int index = i;
checkBoxArray[i] = new CheckBox(text);
checkBoxArray[i].addEventHandler(
MouseEvent.MOUSE_CLICKED,
new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
checkBoxMouseClicked(event, index);
}
});
checkBoxArray[i].setLayoutX(radius);
checkBoxArray[i].setLayoutY((i * 4 + 1) * radius);
root.getChildren().add(checkBoxArray[i]);
}
// Indicate entire section
Rectangle entireSection = new Rectangle(minX, 0, maxX - minX, maxY);
entireSection.setFill(Color.LIGHTGREY);
root.getChildren().add(entireSection);
// Indicate critical section
Rectangle criticalSection = new Rectangle(minCsX, 0, maxCsX - minCsX, maxY);
criticalSection.setFill(Color.GREEN);
root.getChildren().add(criticalSection);
// Define circles for each ball
for (int i = 0; i < circleArray.length; i++) {
CheckBox cb = checkBoxArray[i];
int y = (int) cb.getLayoutY() + radius;
if (i < 5) {
// Reader
circleArray[i] = new Circle(minX, y, radius, balColor1);
} else {
// Writer
circleArray[i] = new Circle(minX, y, radius, balColor2);
}
circleArray[i].setVisible(false);
root.getChildren().add(circleArray[i]);
}
// Define title and assign the scene for main window
primaryStage.setTitle("Moving Balls");
primaryStage.setScene(scene);
primaryStage.show();
// Start thread to draw each 20 ms
threadDraw = new Thread(new DrawRunnable());
threadDraw.start();
}