Java Reference
In-Depth Information
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
JButton clickedButton = (JButton) e.getSource();
for (int i = 0; i < mineSweeper.rows; i++) {
for (int j = 0; j < mineSweeper.columns; j++) {
if (clickedButton == mineSweeper.mineButtons[i][j]) {
MineField.gameState state;
if (e.getButton() == MouseEvent.BUTTON1) {
state = mineSweeper.mineField.resolveClick(i,j, true);
if (state == MineField.gameState.CONTINUE) {
if (mineSweeper.mineField.getMineFlag(i, j) == Mine.flagState.UNKNOWN) {
clickedButton.removeMouseListener(this);
}
}
} else {
state = mineSweeper.mineField.resolveClick(i,j, false);
}
if (state == MineField.gameState.WIN) {
mineSweeperHelper.endGame(true);
} else if (state == MineField.gameState.LOSE){
mineSweeperHelper.endGame(false);
} else {
mineSweeperHelper.updateButtons();
}
}
}
}
mineSweeperHelper.updateLabels();
}
}
As we saw in the
MineSweeperHelper
class, the
MineSweeperMouseListener
class has a constructor that
it uses to get an instance of the
MineSweeper
class. It also gets an instance of the
MineSweeperHelper
class.
Both of those classes need to listen for mouse clicks, so the
MineSweeperMouseListener
class has to have
instances of both classes. The only other method that does anything is the
mouseReleased
method. As we
learn earlier, using the
mouseReleased
method is more reliable than using the
mouseClicked
method,
thanks to the problem of mouse motion wiping out the click event.
The
mouseClicked
method runs through all the buttons until it finds the button on which the player
clicked. If the player clicked the left mouse button, the method calls the
resolveClick
method in the
MineField
class to see whether the player hit a mine. If not, the
resolveClick
method figures out whether
