MagnetGame Design
/*
* Name: Joe Cool
* Lab: Lab 3 (magnets)
* Purpose: MagnetGame draws two magnets on the screen. It handles
* mouse input to allow the user to drag and flip the
* magnets.
*/
public class MagnetGame extends WindowController{
/* The two magnets */
private Magnet magnet1, magnet2;
/* These variables are used to remember which magnet the user
is actively moving and which is reacting to the magnetic field
of the moving magnet. */
private Magnet restingMagnet, movingMagnet;
/* Remember where the mouse was on the last press or drag so
we know how far to move the magnet. */
private Location lastPoint;
/* Remember if we are dragging a magnet. */
private boolean dragging = false;
// Draws the magnets on the screen
public void begin() {
// Draw the two magnets
}
// Remembers the mouse position and if the user is pointing at
// one of the magnets.
// Parameters: point - where the user pressed the mouse button
public void onMousePress(Location point) {
// Remember where the mouse was pressed in lastpoint.
// If the first magnet was pressed on,
// remember that magnet as the movingMagnet and the other
// magnet as the restingMagnet. Set dragging to true.
// else if the second magnet was pressed on
// set it as the movingMagnet and the other as the restingMagnet.
// set dragging to true.
// otherwise (we are in neither magnet),
// set dragging to false.
}
// If a magnet was selected, drag that magnet.
// Parameters: point - the current mouse location
public void onMouseDrag(Location point) {
// If dragging is true,
// determine how far the mouse moved
// and move the movingMagnet by that amount. Then check
// to see if that movement causes an interaction with the
// resting magnet.
}
// If a magnet is clicked on, flip that magnet.
// Parameters: point - where the user clicked the mouse
public void onMouseClick( Location point) {
// If the first magnet was clicked on,
// flip that magnet and the see if the flip causes an
// interaction with the other magnet.
// else if the second magnet was clicked on
// flip that magnet and the see if the flip causes an
// interaction with the other magnet.
}
}
