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/*
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. 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 Oracle or 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
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*/
package layout;
/*
* #%L
* nohr-plugin
* %%
* Copyright (C) 2014 - 2015 NOVA Laboratory of Computer Science and Informatics (NOVA LINCS)
* %%
* This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
* #L%
*/
import java.awt.Component;
import java.awt.Container;
import javax.swing.Spring;
import javax.swing.SpringLayout;
/**
* 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 {
/* Used by makeCompactGrid. */
private static SpringLayout.Constraints getConstraintsForCell(int row, int col, Container parent, int cols) {
final SpringLayout layout = (SpringLayout) parent.getLayout();
final Component c = parent.getComponent(row * cols + col);
return layout.getConstraints(c);
}
/**
* Aligns the first rows * cols components of parent 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 (final 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++) {
final 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++) {
final 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.
final SpringLayout.Constraints pCons = layout.getConstraints(parent);
pCons.setConstraint(SpringLayout.SOUTH, y);
pCons.setConstraint(SpringLayout.EAST, x);
}
/**
* Aligns the first rows * cols components of parent 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 (final ClassCastException exc) {
System.err.println("The first argument to makeGrid must use SpringLayout.");
return;
}
final Spring xPadSpring = Spring.constant(xPad);
final Spring yPadSpring = Spring.constant(yPad);
final Spring initialXSpring = Spring.constant(initialX);
final Spring initialYSpring = Spring.constant(initialY);
final 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)).getHeight();
for (int i = 1; i < max; i++) {
final 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++) {
final 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++) {
final SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i));
if (i % cols == 0) { // start of new row
lastRowCons = lastCons;
cons.setX(initialXSpring);
} else
cons.setX(Spring.sum(lastCons.getConstraint(SpringLayout.EAST), xPadSpring));
if (i / cols == 0)
cons.setY(initialYSpring);
else
cons.setY(Spring.sum(lastRowCons.getConstraint(SpringLayout.SOUTH), yPadSpring));
lastCons = cons;
}
// Set the parent's size.
final 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)));
}
/**
* 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());
}
}
