InteractiveArrayVisualizer.java

/****************************************************************************
 *  Dependencies: DynamicArray<String>.java StdDraw.java StdOut.java
 *
 *  This program takes the maximum array capacity N as a command-line argument.
 *  Then, the user repeatedly clicks cells in the array to fill with "X".
 *  Cells that are in between the size and the capacity of the array are
 *  marked with a full black square.
 *
 ****************************************************************************/
package prove;

import edu.princeton.cs.introcs.StdDraw;
import edu.princeton.cs.introcs.StdOut;

public class InteractiveArrayVisualizer {

    public static void main(String[] args) throws Exception {
        // Array of maximum capacity N (wouldn't fit the line otherwise...)
        int N = 20;
        if (args.length == 1) N = Integer.parseInt(args[0]);

        // repeatedly open site specified my mouse click and draw resulting system
        StdOut.println(N);

        StdDraw.show(0);
        DynamicArray<String> v = new DynamicArray<String>();
        v.add("X");
        ArrayVisualizer.draw(v);
        StdDraw.show(0);

        while (true) {

            // detected mouse click
            if (StdDraw.mousePressed()) {

                // screen x coordinates (don't care about y)
                double x = StdDraw.mouseX();

                // convert to position i
                int i = (int) (Math.floor(x+0.5) );

                // open site i provided it's in bounds
                if (i >= 0 && i <= N ) {
                    StdOut.println(i);
                    if (i < v.size() - 1) {
                        v.set(i, "X");
                    }
                    else if (i == v.size() - 1) {
                        v.pop();
                    }
                    else  {
                        v.add("X"); // Random value
                    }
                    StdOut.println("Size: " + v.size());
                    StdOut.println("Capacity: " + v.capacity());
                }

                // draw the array
                StdDraw.show(0);
                ArrayVisualizer.draw(v);
            }
            StdDraw.show(100);
        }
    }
}