How to pause the UI in the middle of an event handler? - javafx

Question

I don't know how to pause an event handler in the middle, I don't even know if it is possible.
Infact, in the code attached, I would like that :
After the player clicked on the cell, the UI updates the cells according to what the player clicked. Then, the UI pauses for like 2 seconds. And the computer plays after that, updating the cells.
Thank you very much for your answer, I am quite desperate ;)
for (Cell cell : cells) {
if (cell.getHouseNumber() >= 6) {
cell.setOnMousePressed(new EventHandler<MouseEvent>() {
public void handle(MouseEvent me) {
cell.setFill(Color.WHITE);
System.out.println(cell.getHouseNumber() - 6);
if(player1.sow(cell.getHouseNumber() - 6)){
for (int i = 0; i < cells.length; i++) {
if (i < 6) {
cells[i].setSeedsNumber(player1.getSeeds(cells[i].getHouseNumber()));
try {
cells[i].setImage();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else {
cells[i].setSeedsNumber(player1.getSeeds(cells[i - 6].getHouseNumber()));
try {
cells[i].setImage();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
southBoard.setSeedsNumber(player1.getPlayerScore());
playerTurnLabel.setText("Computer playing");
//PAUSE THE UI FOR 2s
player2.computerMove();
for (int i = 0; i < cells.length; i++) {
if (i < 6) {
cells[i].setSeedsNumber(player1.getSeeds(cells[i].getHouseNumber()));
try {
cells[i].setImage();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else {
cells[i].setSeedsNumber(player1.getSeeds(cells[i - 6].getHouseNumber()));
try {
cells[i].setImage();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
playerTurnLabel.setText("Your turn to play");
}else{
playerTurnLabel.setText("Move prohibited ...");
}
}
});
}
}

Answer 1

You can do something like
southBoard.setSeedsNumber(player1.getPlayerScore());
playerTurnLabel.setText("Computer playing");
playerTurnLabel.getScene().getRoot().setDisable(true);
PauseTransition pause = new PauseTransition(Duration.seconds(2));
pause.setOnFinished(event -> {
player2.computerMove();
// etc etc
playerTurnLabel.getScene().getRoot().setDisable(false);
});
pause.play();
So you basically move all the code you want executed after the pause to the onFinished handler. You might or might not need the UI disabled while it is paused; you can remove the calls to setDisable(...) if you don't need them.