Mercurial > hg > release > thermostat-1.6
view client/swing-components/src/main/java/com/redhat/thermostat/swing/components/experimental/WrapLayout.java @ 2049:a92d602216ad
Update copyright license headers for 2017
PR3290
Reviewed-by: jerboaa
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2017-January/021974.html
author | Andrew Azores <aazores@redhat.com> |
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date | Tue, 17 Jan 2017 12:19:56 -0500 |
parents | 31f274ab27a5 |
children |
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/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ /* * Taken from http://tips4java.wordpress.com/2008/11/06/wrap-layout/ * * The about page (http://tips4java.wordpress.com/about/) says this: * "You are free to use and/or modify any or all code posted on the Java Tips * Weblog without restriction. A credit in the code comments would be nice, * but not in any way mandatory." */ package com.redhat.thermostat.swing.components.experimental; import java.awt.*; import javax.swing.JScrollPane; import javax.swing.SwingUtilities; /** * FlowLayout subclass that fully supports wrapping of components. */ public class WrapLayout extends FlowLayout { private static final long serialVersionUID = -9169664895883997422L; /** * Constructs a new <code>WrapLayout</code> with a left * alignment and a default 5-unit horizontal and vertical gap. */ public WrapLayout() { super(); } /** * Constructs a new <code>FlowLayout</code> with the specified * alignment and a default 5-unit horizontal and vertical gap. * The value of the alignment argument must be one of * <code>WrapLayout</code>, <code>WrapLayout</code>, * or <code>WrapLayout</code>. * @param align the alignment value */ public WrapLayout(int align) { super(align); } /** * Creates a new flow layout manager with the indicated alignment * and the indicated horizontal and vertical gaps. * <p> * The value of the alignment argument must be one of * <code>WrapLayout</code>, <code>WrapLayout</code>, * or <code>WrapLayout</code>. * @param align the alignment value * @param hgap the horizontal gap between components * @param vgap the vertical gap between components */ public WrapLayout(int align, int hgap, int vgap) { super(align, hgap, vgap); } /** * Returns the preferred dimensions for this layout given the * <i>visible</i> components in the specified target container. * @param target the component which needs to be laid out * @return the preferred dimensions to lay out the * subcomponents of the specified container */ @Override public Dimension preferredLayoutSize(Container target) { return layoutSize(target, true); } /** * Returns the minimum dimensions needed to layout the <i>visible</i> * components contained in the specified target container. * @param target the component which needs to be laid out * @return the minimum dimensions to lay out the * subcomponents of the specified container */ @Override public Dimension minimumLayoutSize(Container target) { Dimension minimum = layoutSize(target, false); minimum.width -= (getHgap() + 1); return minimum; } /** * Returns the minimum or preferred dimension needed to layout the target * container. * * @param target target to get layout size for * @param preferred should preferred size be calculated * @return the dimension to layout the target container */ private Dimension layoutSize(Container target, boolean preferred) { synchronized (target.getTreeLock()) { // Each row must fit with the width allocated to the containter. // When the container width = 0, the preferred width of the container // has not yet been calculated so lets ask for the maximum. int targetWidth = target.getSize().width; if (targetWidth == 0) targetWidth = Integer.MAX_VALUE; int hgap = getHgap(); int vgap = getVgap(); Insets insets = target.getInsets(); int horizontalInsetsAndGap = insets.left + insets.right + (hgap * 2); int maxWidth = targetWidth - horizontalInsetsAndGap; // Fit components into the allowed width Dimension dim = new Dimension(0, 0); int rowWidth = 0; int rowHeight = 0; int nmembers = target.getComponentCount(); for (int i = 0; i < nmembers; i++) { Component m = target.getComponent(i); if (m.isVisible()) { Dimension d = preferred ? m.getPreferredSize() : m.getMinimumSize(); // Can't add the component to current row. Start a new row. if (rowWidth + d.width > maxWidth) { addRow(dim, rowWidth, rowHeight); rowWidth = 0; rowHeight = 0; } // Add a horizontal gap for all components after the first if (rowWidth != 0) { rowWidth += hgap; } rowWidth += d.width; rowHeight = Math.max(rowHeight, d.height); } } addRow(dim, rowWidth, rowHeight); dim.width += horizontalInsetsAndGap; dim.height += insets.top + insets.bottom + vgap * 2; // When using a scroll pane or the DecoratedLookAndFeel we need to // make sure the preferred size is less than the size of the // target containter so shrinking the container size works // correctly. Removing the horizontal gap is an easy way to do this. Container scrollPane = SwingUtilities.getAncestorOfClass(JScrollPane.class, target); if (scrollPane != null) { dim.width -= (hgap + 1); } return dim; } } /* * A new row has been completed. Use the dimensions of this row * to update the preferred size for the container. * * @param dim update the width and height when appropriate * @param rowWidth the width of the row to add * @param rowHeight the height of the row to add */ private void addRow(Dimension dim, int rowWidth, int rowHeight) { dim.width = Math.max(dim.width, rowWidth); if (dim.height > 0) { dim.height += getVgap(); } dim.height += rowHeight; } }