package sub_arctic.demo_apps;

import sub_arctic.lib.*;
import sub_arctic.output.*;
import sub_arctic.input.*;
import sub_arctic.constraints.std_function; 

/* grid.java
 * This is a very simple grid container.  All elements must be filled in, and
 * they must be filled in order starting from 0,0.
 *
 * 9/24/96 Colleen Kehoe
 *
 */

public class grid extends shrink_wrap_container {
  
  interactor[][] elements;
  int rows;
  int columns;

  public grid(int r, int c) {
    super(0,0,2,true);
    rows = r;
    columns = c;
    elements = new interactor[rows][columns];
  }

  public interactor element_at(int i, int j) {
    return elements[i][j];
  }

  public void set_element_at(int i, int j, interactor n) {
    elements[i][j] = n;
    

    // If we're not in the first column, set our x to be the maximum of the right
    // edge (X2) of the element to our left and the left edge (X1) of the element
    // above us.  Similarly for our y value if we're not in the first row.
    if (i != 0 && j != 0) {
      elements[i][j].set_x_constraint(std_function.max(OTHER.OBJ(elements[i][j-1]).X2(),OTHER.OBJ(elements[i-1][j]).X1(),0));
      elements[i][j].set_y_constraint(std_function.max(OTHER.OBJ(elements[i-1][j]).Y2(),OTHER.OBJ(elements[i][j-1]).Y1(),0));

    } else {

      // If we are in the first column, set our x to our parent's left edge.
      // Otherwise, set it to the right edge of the element to our left.
      if (j == 0) {
	elements[i][j].set_x_constraint(std_function.eq(PARENT.X1()));
      } else {
	elements[i][j].set_x_constraint(std_function.eq(OTHER.OBJ(elements[i][j-1]).X2()));
      }

      // If we are in the first row, set our y to our parent's top edge.
      // Otherwise, set it to the bottom edge of the element above us.
      if (i == 0) {
	elements[i][j].set_y_constraint(std_function.eq(PARENT.Y1()));
      } else {
	elements[i][j].set_y_constraint(std_function.eq(OTHER.OBJ(elements[i-1][j]).Y2()));
	
      }
    }
    add_child(elements[i][j]);
  }

}
/*=========================== COPYRIGHT NOTICE ===========================

This file is part of the subArctic user interface toolkit.

Copyright (c) 1996 Scott Hudson and Ian Smith
All rights reserved.

The subArctic system is freely available for most uses under the terms
and conditions described in 
  http://www.cc.gatech.edu/gvu/ui/sub_arctic/sub_arctic/doc/usage.html 
and appearing in full in the lib/interactor.java source file.

The current release and additional information about this software can be 
found starting at: http://www.cc.gatech.edu/gvu/ui/sub_arctic/

========================================================================*/