5 replies to this topic

[toto_7]

Hello,

I have a JFrame->JPanel->JButtons.. with actionListener store the first clicked button to first JButton variable and the second clicked button to another one. My goal is to learn if those two buttons are connected together (connected means there is a "path" of specific ImageIcon on the rest buttons between the first and the second button only horizontal or vertical). I have created a method called

class boolean legalMove(JButton current)

to a second class and i would like to know how is possible to learn if exist a "path" or not between those two. If anyone has better idea, is welcomed

thank you

Edited by toto_7, 13 May 2011 - 02:11 AM.

[toto_7]

Edited

[wim DC]

What I would do is instead of using JButton, make your own class which extends JButton but which also holds its position:

public class MyButton extends JButton{

  int x;

  int y;


  public MyButton(int x, int y){

    this.x = x;

    this.y = y;

  }


  //getter and setter here

}

If you wanna check if the move is legal you can now use X and Y

MyButton btn1;

MyButton btn2;


public boolean isLegal(){

  int xDifference = btn1.getX() - btn2.getX();

  int yDifference = btn1.getY() - btn2.getY();

  

  return ( xDifference > -1 && xDifference <1 ) ^ ( yDifference > -1 && yDifference <1 )

}

Note the ^ is an exlusive OR operator, like || is OR, and && is AND.
Exclusive OR means it will return true if either the left is true, or the right is true, if both are true it's false.

false ^ false = false

false ^ true = true

true ^ false = true

true ^ true = false

[toto_7]

Thats how im doing it until now.

public BoardPocket(int x, int y, String picture){

		super(new ImageIcon(picture));

		this.row = x;

		this.column = y;

	}

I didnt get your meaning with

( xDifference > -1 && xDifference <1 ) ^ ( yDifference > -1 && yDifference <1 )

[wim DC]

Well, that code returns true if the move is legal:

int xDifference = btn1.getX() - btn2.getX();

int yDifference = btn1.getY() - btn2.getY();

  

return ( xDifference > -1 && xDifference <1 ) ^ ( yDifference > -1 && yDifference <1 )

Where btn1 should be the first butotn clicked, and btn2 the 2nd button clicked.

It's true on the Xs when you're at position '+' (eg, if you click first on '+', then 'X' method returns true, otherwise false.

0  X  0

X  +  X

0  X  0

[toto_7]

Limits are from first position + to second position * the path must be with specific ImageIcon and both + and * connected vertical or horizontal
Example


00000000
00XXX*00
00X00000
00+00000
00000000