--- /dev/null
+package javaapplication1;
+/*
+ * Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of Sun Microsystems nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import javax.swing.*;
+import javax.swing.SpringLayout;
+import java.awt.*;
+
+/**
+ * A 1.4 file that provides utility methods for
+ * creating form- or grid-style layouts with SpringLayout.
+ * These utilities are used by several programs, such as
+ * SpringBox and SpringCompactGrid.
+ */
+public class SpringUtilities {
+ /**
+ * A debugging utility that prints to stdout the component's
+ * minimum, preferred, and maximum sizes.
+ */
+ public static void printSizes(Component c) {
+ System.out.println("minimumSize = " + c.getMinimumSize());
+ System.out.println("preferredSize = " + c.getPreferredSize());
+ System.out.println("maximumSize = " + c.getMaximumSize());
+ }
+
+ /**
+ * Aligns the first <code>rows</code> * <code>cols</code>
+ * components of <code>parent</code> in
+ * a grid. Each component is as big as the maximum
+ * preferred width and height of the components.
+ * 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 makeGrid(Container parent,
+ int rows, int cols,
+ int initialX, int initialY,
+ int xPad, int yPad) {
+ SpringLayout layout;
+ try {
+ layout = (SpringLayout)parent.getLayout();
+ } catch (ClassCastException exc) {
+ System.err.println("The first argument to makeGrid must use SpringLayout.");
+ return;
+ }
+
+ Spring xPadSpring = Spring.constant(xPad);
+ Spring yPadSpring = Spring.constant(yPad);
+ Spring initialXSpring = Spring.constant(initialX);
+ Spring initialYSpring = Spring.constant(initialY);
+ int max = rows * cols;
+
+ //Calculate Springs that are the max of the width/height so that all
+ //cells have the same size.
+ Spring maxWidthSpring = layout.getConstraints(parent.getComponent(0)).
+ getWidth();
+ Spring maxHeightSpring = layout.getConstraints(parent.getComponent(0)).
+ getWidth();
+ for (int i = 1; i < max; i++) {
+ SpringLayout.Constraints cons = layout.getConstraints(
+ parent.getComponent(i));
+
+ maxWidthSpring = Spring.max(maxWidthSpring, cons.getWidth());
+ maxHeightSpring = Spring.max(maxHeightSpring, cons.getHeight());
+ }
+
+ //Apply the new width/height Spring. This forces all the
+ //components to have the same size.
+ for (int i = 0; i < max; i++) {
+ SpringLayout.Constraints cons = layout.getConstraints(
+ parent.getComponent(i));
+
+ cons.setWidth(maxWidthSpring);
+ cons.setHeight(maxHeightSpring);
+ }
+
+ //Then adjust the x/y constraints of all the cells so that they
+ //are aligned in a grid.
+ SpringLayout.Constraints lastCons = null;
+ SpringLayout.Constraints lastRowCons = null;
+ for (int i = 0; i < max; i++) {
+ SpringLayout.Constraints cons = layout.getConstraints(
+ parent.getComponent(i));
+ if (i % cols == 0) { //start of new row
+ lastRowCons = lastCons;
+ cons.setX(initialXSpring);
+ } else { //x position depends on previous component
+ cons.setX(Spring.sum(lastCons.getConstraint(SpringLayout.EAST),
+ xPadSpring));
+ }
+
+ if (i / cols == 0) { //first row
+ cons.setY(initialYSpring);
+ } else { //y position depends on previous row
+ cons.setY(Spring.sum(lastRowCons.getConstraint(SpringLayout.SOUTH),
+ yPadSpring));
+ }
+ lastCons = cons;
+ }
+
+ //Set the parent's size.
+ SpringLayout.Constraints pCons = layout.getConstraints(parent);
+ pCons.setConstraint(SpringLayout.SOUTH,
+ Spring.sum(
+ Spring.constant(yPad),
+ lastCons.getConstraint(SpringLayout.SOUTH)));
+ pCons.setConstraint(SpringLayout.EAST,
+ Spring.sum(
+ Spring.constant(xPad),
+ lastCons.getConstraint(SpringLayout.EAST)));
+ }
+
+ /* Used by makeCompactGrid. */
+ 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);
+ }
+
+ /**
+ * 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) {
+ 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);
+ }
+}