Package Game

Class Input

java.lang.Object

java.awt.event.MouseAdapter

Game.Input

All Implemented Interfaces:

MouseListener, MouseMotionListener, MouseWheelListener, EventListener

public class Input
extends MouseAdapter

Handles player mouse input, including all mouse event actions such as pressing, releasing, and dragging pieces on the chess board.

This class allows players to interact with the chess board by selecting (pressing), moving (dragging), and placing (releasing) pieces. It updates the board state based on valid moves or resets the piece if the move is invalid.

See Also:

• Board

Constructor Summary

Constructors

Constructor	Description
Input(Board board)	Constructs the input handler for mouse events and assigns the target board.

Method Summary

Modifier and Type	Method	Description
void	mouseDragged(MouseEvent e)	Handles mouse drag events from the player.
void	mousePressed(MouseEvent e)	Handles mouse press events from the player.
void	mouseReleased(MouseEvent e)	Handles mouse release events from the player.

Methods inherited from class java.awt.event.MouseAdapter

mouseClicked, mouseEntered, mouseExited, mouseMoved, mouseWheelMoved

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Input

public Input(Board board)

Constructs the input handler for mouse events and assigns the target board.

Sets the Board that this input handler will interact with.

Parameters:

board - the chess board this input will handle

Method Details

mousePressed

public void mousePressed(MouseEvent e)

Handles mouse press events from the player.

Determines the column and row based on the MouseEvent coordinates, then attempts to retrieve a piece from the corresponding location on the Board. If a non-null piece exists at that square, it is selected as the current piece.

Specified by:

mousePressed in interface MouseListener

Overrides:

mousePressed in class MouseAdapter

Parameters:

e - the mouse event triggered by the user click action

mouseReleased

public void mouseReleased(MouseEvent e)

Handles mouse release events from the player.

Determines the column and row based on the MouseEvent coordinates. If Board.selPiece is non-null, the method constructs * a Move and checks whether it is valid. If the move is valid, * the board is updated accordingly. Otherwise, the selected piece * returns to its original position.

Specified by:

mouseReleased in interface MouseListener

Overrides:

mouseReleased in class MouseAdapter

Parameters:

e - the mouse event triggered by the user release action

mouseDragged

public void mouseDragged(MouseEvent e)

Handles mouse drag events from the player.

If Board.selPiece is non-null, updates its screen position based on the current MouseEvent coordinates to allow the player to visually drag the piece. Triggers a repaint() of the board to reflect the piece's new position.

Specified by:

mouseDragged in interface MouseMotionListener

Overrides:

mouseDragged in class MouseAdapter

Parameters:

e - the mouse event triggered by the user drag action