Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;

import javax.swing.Spring;
import javax.swing.SpringLayout;

public class Main {
    /**
     * Aligns the first <code>rows</code> <code>cols</code> components of <code>parent</code> in a grid. Each component in
     * a column is as wide as the maximum preferred width of the components in that column; height is similarly determined
     * for each row. The parent is made just big enough to fit them all.
     * 
     * @param rows
     *          number of rows
     * @param cols
     *          number of columns
     * @param initialX
     *          x location to start the grid at
     * @param initialY
     *          y location to start the grid at
     * @param xPad
     *          x padding between cells
     * @param yPad
     *          y padding between cells
     */
    public static void makeCompactGrid(Container parent, int rows, int cols, int initialX, int initialY, int xPad,
            int yPad) {

        parent.setMaximumSize(new Dimension(Integer.MAX_VALUE, parent.getPreferredSize().height));
        SpringLayout layout;
        try {
            layout = (SpringLayout) parent.getLayout();
        } catch (ClassCastException exc) {
            System.err.println("The first argument to makeCompactGrid must use SpringLayout.");
            return;
        }

        // Align all cells in each column and make them the same width.
        Spring x = Spring.constant(initialX);
        for (int c = 0; c < cols; c++) {
            Spring width = Spring.constant(0);
            for (int r = 0; r < rows; r++) {
                width = Spring.max(width, getConstraintsForCell(r, c, parent, cols).getWidth());
            }
            for (int r = 0; r < rows; r++) {
                SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols);
                constraints.setX(x);
                constraints.setWidth(width);
            }
            x = Spring.sum(x, Spring.sum(width, Spring.constant(xPad)));
        }

        // Align all cells in each row and make them the same height.
        Spring y = Spring.constant(initialY);
        for (int r = 0; r < rows; r++) {
            Spring height = Spring.constant(0);
            for (int c = 0; c < cols; c++) {
                height = Spring.max(height, getConstraintsForCell(r, c, parent, cols).getHeight());
            }
            for (int c = 0; c < cols; c++) {
                SpringLayout.Constraints constraints = getConstraintsForCell(r, c, parent, cols);
                constraints.setY(y);
                constraints.setHeight(height);
            }
            y = Spring.sum(y, Spring.sum(height, Spring.constant(yPad)));
        }

        // Set the parent's size.
        SpringLayout.Constraints pCons = layout.getConstraints(parent);
        pCons.setConstraint(SpringLayout.SOUTH, y);
        pCons.setConstraint(SpringLayout.EAST, x);

    }

    private static SpringLayout.Constraints getConstraintsForCell(int row, int col, Container parent, int cols) {
        SpringLayout layout = (SpringLayout) parent.getLayout();
        Component c = parent.getComponent(row * cols + col);
        return layout.getConstraints(c);
    }
}