| /* |
| * Copyright (c) 1995, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package java.awt; |
| |
| import java.util.Hashtable; |
| import java.util.Arrays; |
| |
| /** |
| * The <code>GridBagLayout</code> class is a flexible layout |
| * manager that aligns components vertically, horizontally or along their |
| * baseline without requiring that the components be of the same size. |
| * Each <code>GridBagLayout</code> object maintains a dynamic, |
| * rectangular grid of cells, with each component occupying |
| * one or more cells, called its <em>display area</em>. |
| * <p> |
| * Each component managed by a <code>GridBagLayout</code> is associated with |
| * an instance of {@link GridBagConstraints}. The constraints object |
| * specifies where a component's display area should be located on the grid |
| * and how the component should be positioned within its display area. In |
| * addition to its constraints object, the <code>GridBagLayout</code> also |
| * considers each component's minimum and preferred sizes in order to |
| * determine a component's size. |
| * <p> |
| * The overall orientation of the grid depends on the container's |
| * {@link ComponentOrientation} property. For horizontal left-to-right |
| * orientations, grid coordinate (0,0) is in the upper left corner of the |
| * container with x increasing to the right and y increasing downward. For |
| * horizontal right-to-left orientations, grid coordinate (0,0) is in the upper |
| * right corner of the container with x increasing to the left and y |
| * increasing downward. |
| * <p> |
| * To use a grid bag layout effectively, you must customize one or more |
| * of the <code>GridBagConstraints</code> objects that are associated |
| * with its components. You customize a <code>GridBagConstraints</code> |
| * object by setting one or more of its instance variables: |
| * <p> |
| * <dl> |
| * <dt>{@link GridBagConstraints#gridx}, |
| * {@link GridBagConstraints#gridy} |
| * <dd>Specifies the cell containing the leading corner of the component's |
| * display area, where the cell at the origin of the grid has address |
| * <code>gridx = 0</code>, |
| * <code>gridy = 0</code>. For horizontal left-to-right layout, |
| * a component's leading corner is its upper left. For horizontal |
| * right-to-left layout, a component's leading corner is its upper right. |
| * Use <code>GridBagConstraints.RELATIVE</code> (the default value) |
| * to specify that the component be placed immediately following |
| * (along the x axis for <code>gridx</code> or the y axis for |
| * <code>gridy</code>) the component that was added to the container |
| * just before this component was added. |
| * <dt>{@link GridBagConstraints#gridwidth}, |
| * {@link GridBagConstraints#gridheight} |
| * <dd>Specifies the number of cells in a row (for <code>gridwidth</code>) |
| * or column (for <code>gridheight</code>) |
| * in the component's display area. |
| * The default value is 1. |
| * Use <code>GridBagConstraints.REMAINDER</code> to specify |
| * that the component's display area will be from <code>gridx</code> |
| * to the last cell in the row (for <code>gridwidth</code>) |
| * or from <code>gridy</code> to the last cell in the column |
| * (for <code>gridheight</code>). |
| * |
| * Use <code>GridBagConstraints.RELATIVE</code> to specify |
| * that the component's display area will be from <code>gridx</code> |
| * to the next to the last cell in its row (for <code>gridwidth</code> |
| * or from <code>gridy</code> to the next to the last cell in its |
| * column (for <code>gridheight</code>). |
| * |
| * <dt>{@link GridBagConstraints#fill} |
| * <dd>Used when the component's display area |
| * is larger than the component's requested size |
| * to determine whether (and how) to resize the component. |
| * Possible values are |
| * <code>GridBagConstraints.NONE</code> (the default), |
| * <code>GridBagConstraints.HORIZONTAL</code> |
| * (make the component wide enough to fill its display area |
| * horizontally, but don't change its height), |
| * <code>GridBagConstraints.VERTICAL</code> |
| * (make the component tall enough to fill its display area |
| * vertically, but don't change its width), and |
| * <code>GridBagConstraints.BOTH</code> |
| * (make the component fill its display area entirely). |
| * <dt>{@link GridBagConstraints#ipadx}, |
| * {@link GridBagConstraints#ipady} |
| * <dd>Specifies the component's internal padding within the layout, |
| * how much to add to the minimum size of the component. |
| * The width of the component will be at least its minimum width |
| * plus <code>ipadx</code> pixels. Similarly, the height of |
| * the component will be at least the minimum height plus |
| * <code>ipady</code> pixels. |
| * <dt>{@link GridBagConstraints#insets} |
| * <dd>Specifies the component's external padding, the minimum |
| * amount of space between the component and the edges of its display area. |
| * <dt>{@link GridBagConstraints#anchor} |
| * <dd>Specifies where the component should be positioned in its display area. |
| * There are three kinds of possible values: absolute, orientation-relative, |
| * and baseline-relative |
| * Orientation relative values are interpreted relative to the container's |
| * <code>ComponentOrientation</code> property while absolute values |
| * are not. Baseline relative values are calculated relative to the |
| * baseline. Valid values are:</dd> |
| * <p> |
| * <center><table BORDER=0 COLS=3 WIDTH=800 |
| * SUMMARY="absolute, relative and baseline values as described above"> |
| * <tr> |
| * <th><P ALIGN="LEFT">Absolute Values</th> |
| * <th><P ALIGN="LEFT">Orientation Relative Values</th> |
| * <th><P ALIGN="LEFT">Baseline Relative Values</th> |
| * </tr> |
| * <tr> |
| * <td> |
| * <li><code>GridBagConstraints.NORTH</code></li> |
| * <li><code>GridBagConstraints.SOUTH</code></li> |
| * <li><code>GridBagConstraints.WEST</code></li> |
| * <li><code>GridBagConstraints.EAST</code></li> |
| * <li><code>GridBagConstraints.NORTHWEST</code></li> |
| * <li><code>GridBagConstraints.NORTHEAST</code></li> |
| * <li><code>GridBagConstraints.SOUTHWEST</code></li> |
| * <li><code>GridBagConstraints.SOUTHEAST</code></li> |
| * <li><code>GridBagConstraints.CENTER</code> (the default)</li> |
| * </td> |
| * <td> |
| * <li><code>GridBagConstraints.PAGE_START</code></li> |
| * <li><code>GridBagConstraints.PAGE_END</code></li> |
| * <li><code>GridBagConstraints.LINE_START</code></li> |
| * <li><code>GridBagConstraints.LINE_END</code></li> |
| * <li><code>GridBagConstraints.FIRST_LINE_START</code></li> |
| * <li><code>GridBagConstraints.FIRST_LINE_END</code></li> |
| * <li><code>GridBagConstraints.LAST_LINE_START</code></li> |
| * <li><code>GridBagConstraints.LAST_LINE_END</code></li> |
| * </td> |
| * <td> |
| * <li><code>GridBagConstraints.BASELINE</code></li> |
| * <li><code>GridBagConstraints.BASELINE_LEADING</code></li> |
| * <li><code>GridBagConstraints.BASELINE_TRAILING</code></li> |
| * <li><code>GridBagConstraints.ABOVE_BASELINE</code></li> |
| * <li><code>GridBagConstraints.ABOVE_BASELINE_LEADING</code></li> |
| * <li><code>GridBagConstraints.ABOVE_BASELINE_TRAILING</code></li> |
| * <li><code>GridBagConstraints.BELOW_BASELINE</code></li> |
| * <li><code>GridBagConstraints.BELOW_BASELINE_LEADING</code></li> |
| * <li><code>GridBagConstraints.BELOW_BASELINE_TRAILING</code></li> |
| * </td> |
| * </tr> |
| * </table></center><p> |
| * <dt>{@link GridBagConstraints#weightx}, |
| * {@link GridBagConstraints#weighty} |
| * <dd>Used to determine how to distribute space, which is |
| * important for specifying resizing behavior. |
| * Unless you specify a weight for at least one component |
| * in a row (<code>weightx</code>) and column (<code>weighty</code>), |
| * all the components clump together in the center of their container. |
| * This is because when the weight is zero (the default), |
| * the <code>GridBagLayout</code> object puts any extra space |
| * between its grid of cells and the edges of the container. |
| * </dl> |
| * <p> |
| * Each row may have a baseline; the baseline is determined by the |
| * components in that row that have a valid baseline and are aligned |
| * along the baseline (the component's anchor value is one of {@code |
| * BASELINE}, {@code BASELINE_LEADING} or {@code BASELINE_TRAILING}). |
| * If none of the components in the row has a valid baseline, the row |
| * does not have a baseline. |
| * <p> |
| * If a component spans rows it is aligned either to the baseline of |
| * the start row (if the baseline-resize behavior is {@code |
| * CONSTANT_ASCENT}) or the end row (if the baseline-resize behavior |
| * is {@code CONSTANT_DESCENT}). The row that the component is |
| * aligned to is called the <em>prevailing row</em>. |
| * <p> |
| * The following figure shows a baseline layout and includes a |
| * component that spans rows: |
| * <center><table summary="Baseline Layout"> |
| * <tr ALIGN=CENTER> |
| * <td> |
| * <img src="doc-files/GridBagLayout-baseline.png" |
| * alt="The following text describes this graphic (Figure 1)." ALIGN=center> |
| * </td> |
| * </table></center> |
| * This layout consists of three components: |
| * <ul><li>A panel that starts in row 0 and ends in row 1. The panel |
| * has a baseline-resize behavior of <code>CONSTANT_DESCENT</code> and has |
| * an anchor of <code>BASELINE</code>. As the baseline-resize behavior |
| * is <code>CONSTANT_DESCENT</code> the prevailing row for the panel is |
| * row 1. |
| * <li>Two buttons, each with a baseline-resize behavior of |
| * <code>CENTER_OFFSET</code> and an anchor of <code>BASELINE</code>. |
| * </ul> |
| * Because the second button and the panel share the same prevailing row, |
| * they are both aligned along their baseline. |
| * <p> |
| * Components positioned using one of the baseline-relative values resize |
| * differently than when positioned using an absolute or orientation-relative |
| * value. How components change is dictated by how the baseline of the |
| * prevailing row changes. The baseline is anchored to the |
| * bottom of the display area if any components with the same prevailing row |
| * have a baseline-resize behavior of <code>CONSTANT_DESCENT</code>, |
| * otherwise the baseline is anchored to the top of the display area. |
| * The following rules dictate the resize behavior: |
| * <ul> |
| * <li>Resizable components positioned above the baseline can only |
| * grow as tall as the baseline. For example, if the baseline is at 100 |
| * and anchored at the top, a resizable component positioned above the |
| * baseline can never grow more than 100 units. |
| * <li>Similarly, resizable components positioned below the baseline can |
| * only grow as high as the difference between the display height and the |
| * baseline. |
| * <li>Resizable components positioned on the baseline with a |
| * baseline-resize behavior of <code>OTHER</code> are only resized if |
| * the baseline at the resized size fits within the display area. If |
| * the baseline is such that it does not fit within the display area |
| * the component is not resized. |
| * <li>Components positioned on the baseline that do not have a |
| * baseline-resize behavior of <code>OTHER</code> |
| * can only grow as tall as {@code display height - baseline + baseline of component}. |
| * </ul> |
| * If you position a component along the baseline, but the |
| * component does not have a valid baseline, it will be vertically centered |
| * in its space. Similarly if you have positioned a component relative |
| * to the baseline and none of the components in the row have a valid |
| * baseline the component is vertically centered. |
| * <p> |
| * The following figures show ten components (all buttons) |
| * managed by a grid bag layout. Figure 2 shows the layout for a horizontal, |
| * left-to-right container and Figure 3 shows the layout for a horizontal, |
| * right-to-left container. |
| * <p> |
| * <center><table COLS=2 WIDTH=600 summary="layout"> |
| * <tr ALIGN=CENTER> |
| * <td> |
| * <img src="doc-files/GridBagLayout-1.gif" alt="The preceeding text describes this graphic (Figure 1)." ALIGN=center HSPACE=10 VSPACE=7> |
| * </td> |
| * <td> |
| * <img src="doc-files/GridBagLayout-2.gif" alt="The preceeding text describes this graphic (Figure 2)." ALIGN=center HSPACE=10 VSPACE=7> |
| * </td> |
| * <tr ALIGN=CENTER> |
| * <td>Figure 2: Horizontal, Left-to-Right</td> |
| * <td>Figure 3: Horizontal, Right-to-Left</td> |
| * </tr> |
| * </table></center> |
| * <p> |
| * Each of the ten components has the <code>fill</code> field |
| * of its associated <code>GridBagConstraints</code> object |
| * set to <code>GridBagConstraints.BOTH</code>. |
| * In addition, the components have the following non-default constraints: |
| * <p> |
| * <ul> |
| * <li>Button1, Button2, Button3: <code>weightx = 1.0</code> |
| * <li>Button4: <code>weightx = 1.0</code>, |
| * <code>gridwidth = GridBagConstraints.REMAINDER</code> |
| * <li>Button5: <code>gridwidth = GridBagConstraints.REMAINDER</code> |
| * <li>Button6: <code>gridwidth = GridBagConstraints.RELATIVE</code> |
| * <li>Button7: <code>gridwidth = GridBagConstraints.REMAINDER</code> |
| * <li>Button8: <code>gridheight = 2</code>, |
| * <code>weighty = 1.0</code> |
| * <li>Button9, Button 10: |
| * <code>gridwidth = GridBagConstraints.REMAINDER</code> |
| * </ul> |
| * <p> |
| * Here is the code that implements the example shown above: |
| * <p> |
| * <hr><blockquote><pre> |
| * import java.awt.*; |
| * import java.util.*; |
| * import java.applet.Applet; |
| * |
| * public class GridBagEx1 extends Applet { |
| * |
| * protected void makebutton(String name, |
| * GridBagLayout gridbag, |
| * GridBagConstraints c) { |
| * Button button = new Button(name); |
| * gridbag.setConstraints(button, c); |
| * add(button); |
| * } |
| * |
| * public void init() { |
| * GridBagLayout gridbag = new GridBagLayout(); |
| * GridBagConstraints c = new GridBagConstraints(); |
| * |
| * setFont(new Font("SansSerif", Font.PLAIN, 14)); |
| * setLayout(gridbag); |
| * |
| * c.fill = GridBagConstraints.BOTH; |
| * c.weightx = 1.0; |
| * makebutton("Button1", gridbag, c); |
| * makebutton("Button2", gridbag, c); |
| * makebutton("Button3", gridbag, c); |
| * |
| * c.gridwidth = GridBagConstraints.REMAINDER; //end row |
| * makebutton("Button4", gridbag, c); |
| * |
| * c.weightx = 0.0; //reset to the default |
| * makebutton("Button5", gridbag, c); //another row |
| * |
| * c.gridwidth = GridBagConstraints.RELATIVE; //next-to-last in row |
| * makebutton("Button6", gridbag, c); |
| * |
| * c.gridwidth = GridBagConstraints.REMAINDER; //end row |
| * makebutton("Button7", gridbag, c); |
| * |
| * c.gridwidth = 1; //reset to the default |
| * c.gridheight = 2; |
| * c.weighty = 1.0; |
| * makebutton("Button8", gridbag, c); |
| * |
| * c.weighty = 0.0; //reset to the default |
| * c.gridwidth = GridBagConstraints.REMAINDER; //end row |
| * c.gridheight = 1; //reset to the default |
| * makebutton("Button9", gridbag, c); |
| * makebutton("Button10", gridbag, c); |
| * |
| * setSize(300, 100); |
| * } |
| * |
| * public static void main(String args[]) { |
| * Frame f = new Frame("GridBag Layout Example"); |
| * GridBagEx1 ex1 = new GridBagEx1(); |
| * |
| * ex1.init(); |
| * |
| * f.add("Center", ex1); |
| * f.pack(); |
| * f.setSize(f.getPreferredSize()); |
| * f.show(); |
| * } |
| * } |
| * </pre></blockquote><hr> |
| * <p> |
| * @author Doug Stein |
| * @author Bill Spitzak (orignial NeWS & OLIT implementation) |
| * @see java.awt.GridBagConstraints |
| * @see java.awt.GridBagLayoutInfo |
| * @see java.awt.ComponentOrientation |
| * @since JDK1.0 |
| */ |
| public class GridBagLayout implements LayoutManager2, |
| java.io.Serializable { |
| |
| static final int EMPIRICMULTIPLIER = 2; |
| /** |
| * This field is no longer used to reserve arrays and keeped for backward |
| * compatibility. Previously, this was |
| * the maximum number of grid positions (both horizontal and |
| * vertical) that could be laid out by the grid bag layout. |
| * Current implementation doesn't impose any limits |
| * on the size of a grid. |
| */ |
| protected static final int MAXGRIDSIZE = 512; |
| |
| /** |
| * The smallest grid that can be laid out by the grid bag layout. |
| */ |
| protected static final int MINSIZE = 1; |
| /** |
| * The preferred grid size that can be laid out by the grid bag layout. |
| */ |
| protected static final int PREFERREDSIZE = 2; |
| |
| /** |
| * This hashtable maintains the association between |
| * a component and its gridbag constraints. |
| * The Keys in <code>comptable</code> are the components and the |
| * values are the instances of <code>GridBagConstraints</code>. |
| * |
| * @serial |
| * @see java.awt.GridBagConstraints |
| */ |
| protected Hashtable<Component,GridBagConstraints> comptable; |
| |
| /** |
| * This field holds a gridbag constraints instance |
| * containing the default values, so if a component |
| * does not have gridbag constraints associated with |
| * it, then the component will be assigned a |
| * copy of the <code>defaultConstraints</code>. |
| * |
| * @serial |
| * @see #getConstraints(Component) |
| * @see #setConstraints(Component, GridBagConstraints) |
| * @see #lookupConstraints(Component) |
| */ |
| protected GridBagConstraints defaultConstraints; |
| |
| /** |
| * This field holds the layout information |
| * for the gridbag. The information in this field |
| * is based on the most recent validation of the |
| * gridbag. |
| * If <code>layoutInfo</code> is <code>null</code> |
| * this indicates that there are no components in |
| * the gridbag or if there are components, they have |
| * not yet been validated. |
| * |
| * @serial |
| * @see #getLayoutInfo(Container, int) |
| */ |
| protected GridBagLayoutInfo layoutInfo; |
| |
| /** |
| * This field holds the overrides to the column minimum |
| * width. If this field is non-<code>null</code> the values are |
| * applied to the gridbag after all of the minimum columns |
| * widths have been calculated. |
| * If columnWidths has more elements than the number of |
| * columns, columns are added to the gridbag to match |
| * the number of elements in columnWidth. |
| * |
| * @serial |
| * @see #getLayoutDimensions() |
| */ |
| public int columnWidths[]; |
| |
| /** |
| * This field holds the overrides to the row minimum |
| * heights. If this field is non-<code>null</code> the values are |
| * applied to the gridbag after all of the minimum row |
| * heights have been calculated. |
| * If <code>rowHeights</code> has more elements than the number of |
| * rows, rowa are added to the gridbag to match |
| * the number of elements in <code>rowHeights</code>. |
| * |
| * @serial |
| * @see #getLayoutDimensions() |
| */ |
| public int rowHeights[]; |
| |
| /** |
| * This field holds the overrides to the column weights. |
| * If this field is non-<code>null</code> the values are |
| * applied to the gridbag after all of the columns |
| * weights have been calculated. |
| * If <code>columnWeights[i]</code> > weight for column i, then |
| * column i is assigned the weight in <code>columnWeights[i]</code>. |
| * If <code>columnWeights</code> has more elements than the number |
| * of columns, the excess elements are ignored - they do |
| * not cause more columns to be created. |
| * |
| * @serial |
| */ |
| public double columnWeights[]; |
| |
| /** |
| * This field holds the overrides to the row weights. |
| * If this field is non-<code>null</code> the values are |
| * applied to the gridbag after all of the rows |
| * weights have been calculated. |
| * If <code>rowWeights[i]</code> > weight for row i, then |
| * row i is assigned the weight in <code>rowWeights[i]</code>. |
| * If <code>rowWeights</code> has more elements than the number |
| * of rows, the excess elements are ignored - they do |
| * not cause more rows to be created. |
| * |
| * @serial |
| */ |
| public double rowWeights[]; |
| |
| /** |
| * The component being positioned. This is set before calling into |
| * <code>adjustForGravity</code>. |
| */ |
| private Component componentAdjusting; |
| |
| /** |
| * Creates a grid bag layout manager. |
| */ |
| public GridBagLayout () { |
| comptable = new Hashtable<Component,GridBagConstraints>(); |
| defaultConstraints = new GridBagConstraints(); |
| } |
| |
| /** |
| * Sets the constraints for the specified component in this layout. |
| * @param comp the component to be modified |
| * @param constraints the constraints to be applied |
| */ |
| public void setConstraints(Component comp, GridBagConstraints constraints) { |
| comptable.put(comp, (GridBagConstraints)constraints.clone()); |
| } |
| |
| /** |
| * Gets the constraints for the specified component. A copy of |
| * the actual <code>GridBagConstraints</code> object is returned. |
| * @param comp the component to be queried |
| * @return the constraint for the specified component in this |
| * grid bag layout; a copy of the actual constraint |
| * object is returned |
| */ |
| public GridBagConstraints getConstraints(Component comp) { |
| GridBagConstraints constraints = comptable.get(comp); |
| if (constraints == null) { |
| setConstraints(comp, defaultConstraints); |
| constraints = comptable.get(comp); |
| } |
| return (GridBagConstraints)constraints.clone(); |
| } |
| |
| /** |
| * Retrieves the constraints for the specified component. |
| * The return value is not a copy, but is the actual |
| * <code>GridBagConstraints</code> object used by the layout mechanism. |
| * <p> |
| * If <code>comp</code> is not in the <code>GridBagLayout</code>, |
| * a set of default <code>GridBagConstraints</code> are returned. |
| * A <code>comp</code> value of <code>null</code> is invalid |
| * and returns <code>null</code>. |
| * |
| * @param comp the component to be queried |
| * @return the contraints for the specified component |
| */ |
| protected GridBagConstraints lookupConstraints(Component comp) { |
| GridBagConstraints constraints = comptable.get(comp); |
| if (constraints == null) { |
| setConstraints(comp, defaultConstraints); |
| constraints = comptable.get(comp); |
| } |
| return constraints; |
| } |
| |
| /** |
| * Removes the constraints for the specified component in this layout |
| * @param comp the component to be modified |
| */ |
| private void removeConstraints(Component comp) { |
| comptable.remove(comp); |
| } |
| |
| /** |
| * Determines the origin of the layout area, in the graphics coordinate |
| * space of the target container. This value represents the pixel |
| * coordinates of the top-left corner of the layout area regardless of |
| * the <code>ComponentOrientation</code> value of the container. This |
| * is distinct from the grid origin given by the cell coordinates (0,0). |
| * Most applications do not call this method directly. |
| * @return the graphics origin of the cell in the top-left |
| * corner of the layout grid |
| * @see java.awt.ComponentOrientation |
| * @since JDK1.1 |
| */ |
| public Point getLayoutOrigin () { |
| Point origin = new Point(0,0); |
| if (layoutInfo != null) { |
| origin.x = layoutInfo.startx; |
| origin.y = layoutInfo.starty; |
| } |
| return origin; |
| } |
| |
| /** |
| * Determines column widths and row heights for the layout grid. |
| * <p> |
| * Most applications do not call this method directly. |
| * @return an array of two arrays, containing the widths |
| * of the layout columns and |
| * the heights of the layout rows |
| * @since JDK1.1 |
| */ |
| public int [][] getLayoutDimensions () { |
| if (layoutInfo == null) |
| return new int[2][0]; |
| |
| int dim[][] = new int [2][]; |
| dim[0] = new int[layoutInfo.width]; |
| dim[1] = new int[layoutInfo.height]; |
| |
| System.arraycopy(layoutInfo.minWidth, 0, dim[0], 0, layoutInfo.width); |
| System.arraycopy(layoutInfo.minHeight, 0, dim[1], 0, layoutInfo.height); |
| |
| return dim; |
| } |
| |
| /** |
| * Determines the weights of the layout grid's columns and rows. |
| * Weights are used to calculate how much a given column or row |
| * stretches beyond its preferred size, if the layout has extra |
| * room to fill. |
| * <p> |
| * Most applications do not call this method directly. |
| * @return an array of two arrays, representing the |
| * horizontal weights of the layout columns |
| * and the vertical weights of the layout rows |
| * @since JDK1.1 |
| */ |
| public double [][] getLayoutWeights () { |
| if (layoutInfo == null) |
| return new double[2][0]; |
| |
| double weights[][] = new double [2][]; |
| weights[0] = new double[layoutInfo.width]; |
| weights[1] = new double[layoutInfo.height]; |
| |
| System.arraycopy(layoutInfo.weightX, 0, weights[0], 0, layoutInfo.width); |
| System.arraycopy(layoutInfo.weightY, 0, weights[1], 0, layoutInfo.height); |
| |
| return weights; |
| } |
| |
| /** |
| * Determines which cell in the layout grid contains the point |
| * specified by <code>(x, y)</code>. Each cell is identified |
| * by its column index (ranging from 0 to the number of columns |
| * minus 1) and its row index (ranging from 0 to the number of |
| * rows minus 1). |
| * <p> |
| * If the <code>(x, y)</code> point lies |
| * outside the grid, the following rules are used. |
| * The column index is returned as zero if <code>x</code> lies to the |
| * left of the layout for a left-to-right container or to the right of |
| * the layout for a right-to-left container. The column index is returned |
| * as the number of columns if <code>x</code> lies |
| * to the right of the layout in a left-to-right container or to the left |
| * in a right-to-left container. |
| * The row index is returned as zero if <code>y</code> lies above the |
| * layout, and as the number of rows if <code>y</code> lies |
| * below the layout. The orientation of a container is determined by its |
| * <code>ComponentOrientation</code> property. |
| * @param x the <i>x</i> coordinate of a point |
| * @param y the <i>y</i> coordinate of a point |
| * @return an ordered pair of indexes that indicate which cell |
| * in the layout grid contains the point |
| * (<i>x</i>, <i>y</i>). |
| * @see java.awt.ComponentOrientation |
| * @since JDK1.1 |
| */ |
| public Point location(int x, int y) { |
| Point loc = new Point(0,0); |
| int i, d; |
| |
| if (layoutInfo == null) |
| return loc; |
| |
| d = layoutInfo.startx; |
| if (!rightToLeft) { |
| for (i=0; i<layoutInfo.width; i++) { |
| d += layoutInfo.minWidth[i]; |
| if (d > x) |
| break; |
| } |
| } else { |
| for (i=layoutInfo.width-1; i>=0; i--) { |
| if (d > x) |
| break; |
| d += layoutInfo.minWidth[i]; |
| } |
| i++; |
| } |
| loc.x = i; |
| |
| d = layoutInfo.starty; |
| for (i=0; i<layoutInfo.height; i++) { |
| d += layoutInfo.minHeight[i]; |
| if (d > y) |
| break; |
| } |
| loc.y = i; |
| |
| return loc; |
| } |
| |
| /** |
| * Has no effect, since this layout manager does not use a per-component string. |
| */ |
| public void addLayoutComponent(String name, Component comp) { |
| } |
| |
| /** |
| * Adds the specified component to the layout, using the specified |
| * <code>constraints</code> object. Note that constraints |
| * are mutable and are, therefore, cloned when cached. |
| * |
| * @param comp the component to be added |
| * @param constraints an object that determines how |
| * the component is added to the layout |
| * @exception IllegalArgumentException if <code>constraints</code> |
| * is not a <code>GridBagConstraint</code> |
| */ |
| public void addLayoutComponent(Component comp, Object constraints) { |
| if (constraints instanceof GridBagConstraints) { |
| setConstraints(comp, (GridBagConstraints)constraints); |
| } else if (constraints != null) { |
| throw new IllegalArgumentException("cannot add to layout: constraints must be a GridBagConstraint"); |
| } |
| } |
| |
| /** |
| * Removes the specified component from this layout. |
| * <p> |
| * Most applications do not call this method directly. |
| * @param comp the component to be removed. |
| * @see java.awt.Container#remove(java.awt.Component) |
| * @see java.awt.Container#removeAll() |
| */ |
| public void removeLayoutComponent(Component comp) { |
| removeConstraints(comp); |
| } |
| |
| /** |
| * Determines the preferred size of the <code>parent</code> |
| * container using this grid bag layout. |
| * <p> |
| * Most applications do not call this method directly. |
| * |
| * @param parent the container in which to do the layout |
| * @see java.awt.Container#getPreferredSize |
| * @return the preferred size of the <code>parent</code> |
| * container |
| */ |
| public Dimension preferredLayoutSize(Container parent) { |
| GridBagLayoutInfo info = getLayoutInfo(parent, PREFERREDSIZE); |
| return getMinSize(parent, info); |
| } |
| |
| /** |
| * Determines the minimum size of the <code>parent</code> container |
| * using this grid bag layout. |
| * <p> |
| * Most applications do not call this method directly. |
| * @param parent the container in which to do the layout |
| * @see java.awt.Container#doLayout |
| * @return the minimum size of the <code>parent</code> container |
| */ |
| public Dimension minimumLayoutSize(Container parent) { |
| GridBagLayoutInfo info = getLayoutInfo(parent, MINSIZE); |
| return getMinSize(parent, info); |
| } |
| |
| /** |
| * Returns the maximum dimensions for this layout given the components |
| * in the specified target container. |
| * @param target the container which needs to be laid out |
| * @see Container |
| * @see #minimumLayoutSize(Container) |
| * @see #preferredLayoutSize(Container) |
| * @return the maximum dimensions for this layout |
| */ |
| public Dimension maximumLayoutSize(Container target) { |
| return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE); |
| } |
| |
| /** |
| * Returns the alignment along the x axis. This specifies how |
| * the component would like to be aligned relative to other |
| * components. The value should be a number between 0 and 1 |
| * where 0 represents alignment along the origin, 1 is aligned |
| * the furthest away from the origin, 0.5 is centered, etc. |
| * <p> |
| * @return the value <code>0.5f</code> to indicate centered |
| */ |
| public float getLayoutAlignmentX(Container parent) { |
| return 0.5f; |
| } |
| |
| /** |
| * Returns the alignment along the y axis. This specifies how |
| * the component would like to be aligned relative to other |
| * components. The value should be a number between 0 and 1 |
| * where 0 represents alignment along the origin, 1 is aligned |
| * the furthest away from the origin, 0.5 is centered, etc. |
| * <p> |
| * @return the value <code>0.5f</code> to indicate centered |
| */ |
| public float getLayoutAlignmentY(Container parent) { |
| return 0.5f; |
| } |
| |
| /** |
| * Invalidates the layout, indicating that if the layout manager |
| * has cached information it should be discarded. |
| */ |
| public void invalidateLayout(Container target) { |
| } |
| |
| /** |
| * Lays out the specified container using this grid bag layout. |
| * This method reshapes components in the specified container in |
| * order to satisfy the contraints of this <code>GridBagLayout</code> |
| * object. |
| * <p> |
| * Most applications do not call this method directly. |
| * @param parent the container in which to do the layout |
| * @see java.awt.Container |
| * @see java.awt.Container#doLayout |
| */ |
| public void layoutContainer(Container parent) { |
| arrangeGrid(parent); |
| } |
| |
| /** |
| * Returns a string representation of this grid bag layout's values. |
| * @return a string representation of this grid bag layout. |
| */ |
| public String toString() { |
| return getClass().getName(); |
| } |
| |
| /** |
| * Print the layout information. Useful for debugging. |
| */ |
| |
| /* DEBUG |
| * |
| * protected void dumpLayoutInfo(GridBagLayoutInfo s) { |
| * int x; |
| * |
| * System.out.println("Col\tWidth\tWeight"); |
| * for (x=0; x<s.width; x++) { |
| * System.out.println(x + "\t" + |
| * s.minWidth[x] + "\t" + |
| * s.weightX[x]); |
| * } |
| * System.out.println("Row\tHeight\tWeight"); |
| * for (x=0; x<s.height; x++) { |
| * System.out.println(x + "\t" + |
| * s.minHeight[x] + "\t" + |
| * s.weightY[x]); |
| * } |
| * } |
| */ |
| |
| /** |
| * Print the layout constraints. Useful for debugging. |
| */ |
| |
| /* DEBUG |
| * |
| * protected void dumpConstraints(GridBagConstraints constraints) { |
| * System.out.println( |
| * "wt " + |
| * constraints.weightx + |
| * " " + |
| * constraints.weighty + |
| * ", " + |
| * |
| * "box " + |
| * constraints.gridx + |
| * " " + |
| * constraints.gridy + |
| * " " + |
| * constraints.gridwidth + |
| * " " + |
| * constraints.gridheight + |
| * ", " + |
| * |
| * "min " + |
| * constraints.minWidth + |
| * " " + |
| * constraints.minHeight + |
| * ", " + |
| * |
| * "pad " + |
| * constraints.insets.bottom + |
| * " " + |
| * constraints.insets.left + |
| * " " + |
| * constraints.insets.right + |
| * " " + |
| * constraints.insets.top + |
| * " " + |
| * constraints.ipadx + |
| * " " + |
| * constraints.ipady); |
| * } |
| */ |
| |
| /** |
| * Fills in an instance of <code>GridBagLayoutInfo</code> for the |
| * current set of managed children. This requires three passes through the |
| * set of children: |
| * |
| * <ol> |
| * <li>Figure out the dimensions of the layout grid. |
| * <li>Determine which cells the components occupy. |
| * <li>Distribute the weights and min sizes amoung the rows/columns. |
| * </ol> |
| * |
| * This also caches the minsizes for all the children when they are |
| * first encountered (so subsequent loops don't need to ask again). |
| * <p> |
| * This method should only be used internally by |
| * <code>GridBagLayout</code>. |
| * |
| * @param parent the layout container |
| * @param sizeflag either <code>PREFERREDSIZE</code> or |
| * <code>MINSIZE</code> |
| * @return the <code>GridBagLayoutInfo</code> for the set of children |
| * @since 1.4 |
| */ |
| protected GridBagLayoutInfo getLayoutInfo(Container parent, int sizeflag) { |
| return GetLayoutInfo(parent, sizeflag); |
| } |
| |
| /* |
| * Calculate maximum array sizes to allocate arrays without ensureCapacity |
| * we may use preCalculated sizes in whole class because of upper estimation of |
| * maximumArrayXIndex and maximumArrayYIndex. |
| */ |
| |
| private long[] preInitMaximumArraySizes(Container parent){ |
| Component components[] = parent.getComponents(); |
| Component comp; |
| GridBagConstraints constraints; |
| int curX, curY; |
| int curWidth, curHeight; |
| int preMaximumArrayXIndex = 0; |
| int preMaximumArrayYIndex = 0; |
| long [] returnArray = new long[2]; |
| |
| for (int compId = 0 ; compId < components.length ; compId++) { |
| comp = components[compId]; |
| if (!comp.isVisible()) { |
| continue; |
| } |
| |
| constraints = lookupConstraints(comp); |
| curX = constraints.gridx; |
| curY = constraints.gridy; |
| curWidth = constraints.gridwidth; |
| curHeight = constraints.gridheight; |
| |
| // -1==RELATIVE, means that column|row equals to previously added component, |
| // since each next Component with gridx|gridy == RELATIVE starts from |
| // previous position, so we should start from previous component which |
| // already used in maximumArray[X|Y]Index calculation. We could just increase |
| // maximum by 1 to handle situation when component with gridx=-1 was added. |
| if (curX < 0){ |
| curX = ++preMaximumArrayYIndex; |
| } |
| if (curY < 0){ |
| curY = ++preMaximumArrayXIndex; |
| } |
| // gridwidth|gridheight may be equal to RELATIVE (-1) or REMAINDER (0) |
| // in any case using 1 instead of 0 or -1 should be sufficient to for |
| // correct maximumArraySizes calculation |
| if (curWidth <= 0){ |
| curWidth = 1; |
| } |
| if (curHeight <= 0){ |
| curHeight = 1; |
| } |
| |
| preMaximumArrayXIndex = Math.max(curY + curHeight, preMaximumArrayXIndex); |
| preMaximumArrayYIndex = Math.max(curX + curWidth, preMaximumArrayYIndex); |
| } //for (components) loop |
| // Must specify index++ to allocate well-working arrays. |
| /* fix for 4623196. |
| * now return long array instead of Point |
| */ |
| returnArray[0] = preMaximumArrayXIndex; |
| returnArray[1] = preMaximumArrayYIndex; |
| return returnArray; |
| } //PreInitMaximumSizes |
| |
| /** |
| * This method is obsolete and supplied for backwards |
| * compatability only; new code should call {@link |
| * #getLayoutInfo(java.awt.Container, int) getLayoutInfo} instead. |
| * This method is the same as <code>getLayoutInfo</code>; |
| * refer to <code>getLayoutInfo</code> for details on parameters |
| * and return value. |
| */ |
| protected GridBagLayoutInfo GetLayoutInfo(Container parent, int sizeflag) { |
| synchronized (parent.getTreeLock()) { |
| GridBagLayoutInfo r; |
| Component comp; |
| GridBagConstraints constraints; |
| Dimension d; |
| Component components[] = parent.getComponents(); |
| // Code below will address index curX+curWidth in the case of yMaxArray, weightY |
| // ( respectively curY+curHeight for xMaxArray, weightX ) where |
| // curX in 0 to preInitMaximumArraySizes.y |
| // Thus, the maximum index that could |
| // be calculated in the following code is curX+curX. |
| // EmpericMultier equals 2 because of this. |
| |
| int layoutWidth, layoutHeight; |
| int []xMaxArray; |
| int []yMaxArray; |
| int compindex, i, k, px, py, pixels_diff, nextSize; |
| int curX = 0; // constraints.gridx |
| int curY = 0; // constraints.gridy |
| int curWidth = 1; // constraints.gridwidth |
| int curHeight = 1; // constraints.gridheight |
| int curRow, curCol; |
| double weight_diff, weight; |
| int maximumArrayXIndex = 0; |
| int maximumArrayYIndex = 0; |
| int anchor; |
| |
| /* |
| * Pass #1 |
| * |
| * Figure out the dimensions of the layout grid (use a value of 1 for |
| * zero or negative widths and heights). |
| */ |
| |
| layoutWidth = layoutHeight = 0; |
| curRow = curCol = -1; |
| long [] arraySizes = preInitMaximumArraySizes(parent); |
| |
| /* fix for 4623196. |
| * If user try to create a very big grid we can |
| * get NegativeArraySizeException because of integer value |
| * overflow (EMPIRICMULTIPLIER*gridSize might be more then Integer.MAX_VALUE). |
| * We need to detect this situation and try to create a |
| * grid with Integer.MAX_VALUE size instead. |
| */ |
| maximumArrayXIndex = (EMPIRICMULTIPLIER * arraySizes[0] > Integer.MAX_VALUE )? Integer.MAX_VALUE : EMPIRICMULTIPLIER*(int)arraySizes[0]; |
| maximumArrayYIndex = (EMPIRICMULTIPLIER * arraySizes[1] > Integer.MAX_VALUE )? Integer.MAX_VALUE : EMPIRICMULTIPLIER*(int)arraySizes[1]; |
| |
| if (rowHeights != null){ |
| maximumArrayXIndex = Math.max(maximumArrayXIndex, rowHeights.length); |
| } |
| if (columnWidths != null){ |
| maximumArrayYIndex = Math.max(maximumArrayYIndex, columnWidths.length); |
| } |
| |
| xMaxArray = new int[maximumArrayXIndex]; |
| yMaxArray = new int[maximumArrayYIndex]; |
| |
| boolean hasBaseline = false; |
| for (compindex = 0 ; compindex < components.length ; compindex++) { |
| comp = components[compindex]; |
| if (!comp.isVisible()) |
| continue; |
| constraints = lookupConstraints(comp); |
| |
| curX = constraints.gridx; |
| curY = constraints.gridy; |
| curWidth = constraints.gridwidth; |
| if (curWidth <= 0) |
| curWidth = 1; |
| curHeight = constraints.gridheight; |
| if (curHeight <= 0) |
| curHeight = 1; |
| |
| /* If x or y is negative, then use relative positioning: */ |
| if (curX < 0 && curY < 0) { |
| if (curRow >= 0) |
| curY = curRow; |
| else if (curCol >= 0) |
| curX = curCol; |
| else |
| curY = 0; |
| } |
| if (curX < 0) { |
| px = 0; |
| for (i = curY; i < (curY + curHeight); i++) { |
| px = Math.max(px, xMaxArray[i]); |
| } |
| |
| curX = px - curX - 1; |
| if(curX < 0) |
| curX = 0; |
| } |
| else if (curY < 0) { |
| py = 0; |
| for (i = curX; i < (curX + curWidth); i++) { |
| py = Math.max(py, yMaxArray[i]); |
| } |
| curY = py - curY - 1; |
| if(curY < 0) |
| curY = 0; |
| } |
| |
| /* Adjust the grid width and height |
| * fix for 5005945: unneccessary loops removed |
| */ |
| px = curX + curWidth; |
| if (layoutWidth < px) { |
| layoutWidth = px; |
| } |
| py = curY + curHeight; |
| if (layoutHeight < py) { |
| layoutHeight = py; |
| } |
| |
| /* Adjust xMaxArray and yMaxArray */ |
| for (i = curX; i < (curX + curWidth); i++) { |
| yMaxArray[i] =py; |
| } |
| for (i = curY; i < (curY + curHeight); i++) { |
| xMaxArray[i] = px; |
| } |
| |
| |
| /* Cache the current slave's size. */ |
| if (sizeflag == PREFERREDSIZE) |
| d = comp.getPreferredSize(); |
| else |
| d = comp.getMinimumSize(); |
| constraints.minWidth = d.width; |
| constraints.minHeight = d.height; |
| if (calculateBaseline(comp, constraints, d)) { |
| hasBaseline = true; |
| } |
| |
| /* Zero width and height must mean that this is the last item (or |
| * else something is wrong). */ |
| if (constraints.gridheight == 0 && constraints.gridwidth == 0) |
| curRow = curCol = -1; |
| |
| /* Zero width starts a new row */ |
| if (constraints.gridheight == 0 && curRow < 0) |
| curCol = curX + curWidth; |
| |
| /* Zero height starts a new column */ |
| else if (constraints.gridwidth == 0 && curCol < 0) |
| curRow = curY + curHeight; |
| } //for (components) loop |
| |
| |
| /* |
| * Apply minimum row/column dimensions |
| */ |
| if (columnWidths != null && layoutWidth < columnWidths.length) |
| layoutWidth = columnWidths.length; |
| if (rowHeights != null && layoutHeight < rowHeights.length) |
| layoutHeight = rowHeights.length; |
| |
| r = new GridBagLayoutInfo(layoutWidth, layoutHeight); |
| |
| /* |
| * Pass #2 |
| * |
| * Negative values for gridX are filled in with the current x value. |
| * Negative values for gridY are filled in with the current y value. |
| * Negative or zero values for gridWidth and gridHeight end the current |
| * row or column, respectively. |
| */ |
| |
| curRow = curCol = -1; |
| |
| Arrays.fill(xMaxArray, 0); |
| Arrays.fill(yMaxArray, 0); |
| |
| int[] maxAscent = null; |
| int[] maxDescent = null; |
| short[] baselineType = null; |
| |
| if (hasBaseline) { |
| r.maxAscent = maxAscent = new int[layoutHeight]; |
| r.maxDescent = maxDescent = new int[layoutHeight]; |
| r.baselineType = baselineType = new short[layoutHeight]; |
| r.hasBaseline = true; |
| } |
| |
| |
| for (compindex = 0 ; compindex < components.length ; compindex++) { |
| comp = components[compindex]; |
| if (!comp.isVisible()) |
| continue; |
| constraints = lookupConstraints(comp); |
| |
| curX = constraints.gridx; |
| curY = constraints.gridy; |
| curWidth = constraints.gridwidth; |
| curHeight = constraints.gridheight; |
| |
| /* If x or y is negative, then use relative positioning: */ |
| if (curX < 0 && curY < 0) { |
| if(curRow >= 0) |
| curY = curRow; |
| else if(curCol >= 0) |
| curX = curCol; |
| else |
| curY = 0; |
| } |
| |
| if (curX < 0) { |
| if (curHeight <= 0) { |
| curHeight += r.height - curY; |
| if (curHeight < 1) |
| curHeight = 1; |
| } |
| |
| px = 0; |
| for (i = curY; i < (curY + curHeight); i++) |
| px = Math.max(px, xMaxArray[i]); |
| |
| curX = px - curX - 1; |
| if(curX < 0) |
| curX = 0; |
| } |
| else if (curY < 0) { |
| if (curWidth <= 0) { |
| curWidth += r.width - curX; |
| if (curWidth < 1) |
| curWidth = 1; |
| } |
| |
| py = 0; |
| for (i = curX; i < (curX + curWidth); i++){ |
| py = Math.max(py, yMaxArray[i]); |
| } |
| |
| curY = py - curY - 1; |
| if(curY < 0) |
| curY = 0; |
| } |
| |
| if (curWidth <= 0) { |
| curWidth += r.width - curX; |
| if (curWidth < 1) |
| curWidth = 1; |
| } |
| |
| if (curHeight <= 0) { |
| curHeight += r.height - curY; |
| if (curHeight < 1) |
| curHeight = 1; |
| } |
| |
| px = curX + curWidth; |
| py = curY + curHeight; |
| |
| for (i = curX; i < (curX + curWidth); i++) { yMaxArray[i] = py; } |
| for (i = curY; i < (curY + curHeight); i++) { xMaxArray[i] = px; } |
| |
| /* Make negative sizes start a new row/column */ |
| if (constraints.gridheight == 0 && constraints.gridwidth == 0) |
| curRow = curCol = -1; |
| if (constraints.gridheight == 0 && curRow < 0) |
| curCol = curX + curWidth; |
| else if (constraints.gridwidth == 0 && curCol < 0) |
| curRow = curY + curHeight; |
| |
| /* Assign the new values to the gridbag slave */ |
| constraints.tempX = curX; |
| constraints.tempY = curY; |
| constraints.tempWidth = curWidth; |
| constraints.tempHeight = curHeight; |
| |
| anchor = constraints.anchor; |
| if (hasBaseline) { |
| switch(anchor) { |
| case GridBagConstraints.BASELINE: |
| case GridBagConstraints.BASELINE_LEADING: |
| case GridBagConstraints.BASELINE_TRAILING: |
| if (constraints.ascent >= 0) { |
| if (curHeight == 1) { |
| maxAscent[curY] = |
| Math.max(maxAscent[curY], |
| constraints.ascent); |
| maxDescent[curY] = |
| Math.max(maxDescent[curY], |
| constraints.descent); |
| } |
| else { |
| if (constraints.baselineResizeBehavior == |
| Component.BaselineResizeBehavior. |
| CONSTANT_DESCENT) { |
| maxDescent[curY + curHeight - 1] = |
| Math.max(maxDescent[curY + curHeight |
| - 1], |
| constraints.descent); |
| } |
| else { |
| maxAscent[curY] = Math.max(maxAscent[curY], |
| constraints.ascent); |
| } |
| } |
| if (constraints.baselineResizeBehavior == |
| Component.BaselineResizeBehavior.CONSTANT_DESCENT) { |
| baselineType[curY + curHeight - 1] |= |
| (1 << constraints. |
| baselineResizeBehavior.ordinal()); |
| } |
| else { |
| baselineType[curY] |= (1 << constraints. |
| baselineResizeBehavior.ordinal()); |
| } |
| } |
| break; |
| case GridBagConstraints.ABOVE_BASELINE: |
| case GridBagConstraints.ABOVE_BASELINE_LEADING: |
| case GridBagConstraints.ABOVE_BASELINE_TRAILING: |
| // Component positioned above the baseline. |
| // To make the bottom edge of the component aligned |
| // with the baseline the bottom inset is |
| // added to the descent, the rest to the ascent. |
| pixels_diff = constraints.minHeight + |
| constraints.insets.top + |
| constraints.ipady; |
| maxAscent[curY] = Math.max(maxAscent[curY], |
| pixels_diff); |
| maxDescent[curY] = Math.max(maxDescent[curY], |
| constraints.insets.bottom); |
| break; |
| case GridBagConstraints.BELOW_BASELINE: |
| case GridBagConstraints.BELOW_BASELINE_LEADING: |
| case GridBagConstraints.BELOW_BASELINE_TRAILING: |
| // Component positioned below the baseline. |
| // To make the top edge of the component aligned |
| // with the baseline the top inset is |
| // added to the ascent, the rest to the descent. |
| pixels_diff = constraints.minHeight + |
| constraints.insets.bottom + constraints.ipady; |
| maxDescent[curY] = Math.max(maxDescent[curY], |
| pixels_diff); |
| maxAscent[curY] = Math.max(maxAscent[curY], |
| constraints.insets.top); |
| break; |
| } |
| } |
| } |
| |
| r.weightX = new double[maximumArrayYIndex]; |
| r.weightY = new double[maximumArrayXIndex]; |
| r.minWidth = new int[maximumArrayYIndex]; |
| r.minHeight = new int[maximumArrayXIndex]; |
| |
| |
| /* |
| * Apply minimum row/column dimensions and weights |
| */ |
| if (columnWidths != null) |
| System.arraycopy(columnWidths, 0, r.minWidth, 0, columnWidths.length); |
| if (rowHeights != null) |
| System.arraycopy(rowHeights, 0, r.minHeight, 0, rowHeights.length); |
| if (columnWeights != null) |
| System.arraycopy(columnWeights, 0, r.weightX, 0, Math.min(r.weightX.length, columnWeights.length)); |
| if (rowWeights != null) |
| System.arraycopy(rowWeights, 0, r.weightY, 0, Math.min(r.weightY.length, rowWeights.length)); |
| |
| /* |
| * Pass #3 |
| * |
| * Distribute the minimun widths and weights: |
| */ |
| |
| nextSize = Integer.MAX_VALUE; |
| |
| for (i = 1; |
| i != Integer.MAX_VALUE; |
| i = nextSize, nextSize = Integer.MAX_VALUE) { |
| for (compindex = 0 ; compindex < components.length ; compindex++) { |
| comp = components[compindex]; |
| if (!comp.isVisible()) |
| continue; |
| constraints = lookupConstraints(comp); |
| |
| if (constraints.tempWidth == i) { |
| px = constraints.tempX + constraints.tempWidth; /* right column */ |
| |
| /* |
| * Figure out if we should use this slave\'s weight. If the weight |
| * is less than the total weight spanned by the width of the cell, |
| * then discard the weight. Otherwise split the difference |
| * according to the existing weights. |
| */ |
| |
| weight_diff = constraints.weightx; |
| for (k = constraints.tempX; k < px; k++) |
| weight_diff -= r.weightX[k]; |
| if (weight_diff > 0.0) { |
| weight = 0.0; |
| for (k = constraints.tempX; k < px; k++) |
| weight += r.weightX[k]; |
| for (k = constraints.tempX; weight > 0.0 && k < px; k++) { |
| double wt = r.weightX[k]; |
| double dx = (wt * weight_diff) / weight; |
| r.weightX[k] += dx; |
| weight_diff -= dx; |
| weight -= wt; |
| } |
| /* Assign the remainder to the rightmost cell */ |
| r.weightX[px-1] += weight_diff; |
| } |
| |
| /* |
| * Calculate the minWidth array values. |
| * First, figure out how wide the current slave needs to be. |
| * Then, see if it will fit within the current minWidth values. |
| * If it will not fit, add the difference according to the |
| * weightX array. |
| */ |
| |
| pixels_diff = |
| constraints.minWidth + constraints.ipadx + |
| constraints.insets.left + constraints.insets.right; |
| |
| for (k = constraints.tempX; k < px; k++) |
| pixels_diff -= r.minWidth[k]; |
| if (pixels_diff > 0) { |
| weight = 0.0; |
| for (k = constraints.tempX; k < px; k++) |
| weight += r.weightX[k]; |
| for (k = constraints.tempX; weight > 0.0 && k < px; k++) { |
| double wt = r.weightX[k]; |
| int dx = (int)((wt * ((double)pixels_diff)) / weight); |
| r.minWidth[k] += dx; |
| pixels_diff -= dx; |
| weight -= wt; |
| } |
| /* Any leftovers go into the rightmost cell */ |
| r.minWidth[px-1] += pixels_diff; |
| } |
| } |
| else if (constraints.tempWidth > i && constraints.tempWidth < nextSize) |
| nextSize = constraints.tempWidth; |
| |
| |
| if (constraints.tempHeight == i) { |
| py = constraints.tempY + constraints.tempHeight; /* bottom row */ |
| |
| /* |
| * Figure out if we should use this slave's weight. If the weight |
| * is less than the total weight spanned by the height of the cell, |
| * then discard the weight. Otherwise split it the difference |
| * according to the existing weights. |
| */ |
| |
| weight_diff = constraints.weighty; |
| for (k = constraints.tempY; k < py; k++) |
| weight_diff -= r.weightY[k]; |
| if (weight_diff > 0.0) { |
| weight = 0.0; |
| for (k = constraints.tempY; k < py; k++) |
| weight += r.weightY[k]; |
| for (k = constraints.tempY; weight > 0.0 && k < py; k++) { |
| double wt = r.weightY[k]; |
| double dy = (wt * weight_diff) / weight; |
| r.weightY[k] += dy; |
| weight_diff -= dy; |
| weight -= wt; |
| } |
| /* Assign the remainder to the bottom cell */ |
| r.weightY[py-1] += weight_diff; |
| } |
| |
| /* |
| * Calculate the minHeight array values. |
| * First, figure out how tall the current slave needs to be. |
| * Then, see if it will fit within the current minHeight values. |
| * If it will not fit, add the difference according to the |
| * weightY array. |
| */ |
| |
| pixels_diff = -1; |
| if (hasBaseline) { |
| switch(constraints.anchor) { |
| case GridBagConstraints.BASELINE: |
| case GridBagConstraints.BASELINE_LEADING: |
| case GridBagConstraints.BASELINE_TRAILING: |
| if (constraints.ascent >= 0) { |
| if (constraints.tempHeight == 1) { |
| pixels_diff = |
| maxAscent[constraints.tempY] + |
| maxDescent[constraints.tempY]; |
| } |
| else if (constraints.baselineResizeBehavior != |
| Component.BaselineResizeBehavior. |
| CONSTANT_DESCENT) { |
| pixels_diff = |
| maxAscent[constraints.tempY] + |
| constraints.descent; |
| } |
| else { |
| pixels_diff = constraints.ascent + |
| maxDescent[constraints.tempY + |
| constraints.tempHeight - 1]; |
| } |
| } |
| break; |
| case GridBagConstraints.ABOVE_BASELINE: |
| case GridBagConstraints.ABOVE_BASELINE_LEADING: |
| case GridBagConstraints.ABOVE_BASELINE_TRAILING: |
| pixels_diff = constraints.insets.top + |
| constraints.minHeight + |
| constraints.ipady + |
| maxDescent[constraints.tempY]; |
| break; |
| case GridBagConstraints.BELOW_BASELINE: |
| case GridBagConstraints.BELOW_BASELINE_LEADING: |
| case GridBagConstraints.BELOW_BASELINE_TRAILING: |
| pixels_diff = maxAscent[constraints.tempY] + |
| constraints.minHeight + |
| constraints.insets.bottom + |
| constraints.ipady; |
| break; |
| } |
| } |
| if (pixels_diff == -1) { |
| pixels_diff = |
| constraints.minHeight + constraints.ipady + |
| constraints.insets.top + |
| constraints.insets.bottom; |
| } |
| for (k = constraints.tempY; k < py; k++) |
| pixels_diff -= r.minHeight[k]; |
| if (pixels_diff > 0) { |
| weight = 0.0; |
| for (k = constraints.tempY; k < py; k++) |
| weight += r.weightY[k]; |
| for (k = constraints.tempY; weight > 0.0 && k < py; k++) { |
| double wt = r.weightY[k]; |
| int dy = (int)((wt * ((double)pixels_diff)) / weight); |
| r.minHeight[k] += dy; |
| pixels_diff -= dy; |
| weight -= wt; |
| } |
| /* Any leftovers go into the bottom cell */ |
| r.minHeight[py-1] += pixels_diff; |
| } |
| } |
| else if (constraints.tempHeight > i && |
| constraints.tempHeight < nextSize) |
| nextSize = constraints.tempHeight; |
| } |
| } |
| return r; |
| } |
| } //getLayoutInfo() |
| |
| /** |
| * Calculate the baseline for the specified component. |
| * If {@code c} is positioned along it's baseline, the baseline is |
| * obtained and the {@code constraints} ascent, descent and |
| * baseline resize behavior are set from the component; and true is |
| * returned. Otherwise false is returned. |
| */ |
| private boolean calculateBaseline(Component c, |
| GridBagConstraints constraints, |
| Dimension size) { |
| int anchor = constraints.anchor; |
| if (anchor == GridBagConstraints.BASELINE || |
| anchor == GridBagConstraints.BASELINE_LEADING || |
| anchor == GridBagConstraints.BASELINE_TRAILING) { |
| // Apply the padding to the component, then ask for the baseline. |
| int w = size.width + constraints.ipadx; |
| int h = size.height + constraints.ipady; |
| constraints.ascent = c.getBaseline(w, h); |
| if (constraints.ascent >= 0) { |
| // Component has a baseline |
| int baseline = constraints.ascent; |
| // Adjust the ascent and descent to include the insets. |
| constraints.descent = h - constraints.ascent + |
| constraints.insets.bottom; |
| constraints.ascent += constraints.insets.top; |
| constraints.baselineResizeBehavior = |
| c.getBaselineResizeBehavior(); |
| constraints.centerPadding = 0; |
| if (constraints.baselineResizeBehavior == Component. |
| BaselineResizeBehavior.CENTER_OFFSET) { |
| // Component has a baseline resize behavior of |
| // CENTER_OFFSET, calculate centerPadding and |
| // centerOffset (see the description of |
| // CENTER_OFFSET in the enum for detais on this |
| // algorithm). |
| int nextBaseline = c.getBaseline(w, h + 1); |
| constraints.centerOffset = baseline - h / 2; |
| if (h % 2 == 0) { |
| if (baseline != nextBaseline) { |
| constraints.centerPadding = 1; |
| } |
| } |
| else if (baseline == nextBaseline){ |
| constraints.centerOffset--; |
| constraints.centerPadding = 1; |
| } |
| } |
| } |
| return true; |
| } |
| else { |
| constraints.ascent = -1; |
| return false; |
| } |
| } |
| |
| /** |
| * Adjusts the x, y, width, and height fields to the correct |
| * values depending on the constraint geometry and pads. |
| * This method should only be used internally by |
| * <code>GridBagLayout</code>. |
| * |
| * @param constraints the constraints to be applied |
| * @param r the <code>Rectangle</code> to be adjusted |
| * @since 1.4 |
| */ |
| protected void adjustForGravity(GridBagConstraints constraints, |
| Rectangle r) { |
| AdjustForGravity(constraints, r); |
| } |
| |
| /** |
| * This method is obsolete and supplied for backwards |
| * compatability only; new code should call {@link |
| * #adjustForGravity(java.awt.GridBagConstraints, java.awt.Rectangle) |
| * adjustForGravity} instead. |
| * This method is the same as <code>adjustForGravity</code>; |
| * refer to <code>adjustForGravity</code> for details |
| * on parameters. |
| */ |
| protected void AdjustForGravity(GridBagConstraints constraints, |
| Rectangle r) { |
| int diffx, diffy; |
| int cellY = r.y; |
| int cellHeight = r.height; |
| |
| if (!rightToLeft) { |
| r.x += constraints.insets.left; |
| } else { |
| r.x -= r.width - constraints.insets.right; |
| } |
| r.width -= (constraints.insets.left + constraints.insets.right); |
| r.y += constraints.insets.top; |
| r.height -= (constraints.insets.top + constraints.insets.bottom); |
| |
| diffx = 0; |
| if ((constraints.fill != GridBagConstraints.HORIZONTAL && |
| constraints.fill != GridBagConstraints.BOTH) |
| && (r.width > (constraints.minWidth + constraints.ipadx))) { |
| diffx = r.width - (constraints.minWidth + constraints.ipadx); |
| r.width = constraints.minWidth + constraints.ipadx; |
| } |
| |
| diffy = 0; |
| if ((constraints.fill != GridBagConstraints.VERTICAL && |
| constraints.fill != GridBagConstraints.BOTH) |
| && (r.height > (constraints.minHeight + constraints.ipady))) { |
| diffy = r.height - (constraints.minHeight + constraints.ipady); |
| r.height = constraints.minHeight + constraints.ipady; |
| } |
| |
| switch (constraints.anchor) { |
| case GridBagConstraints.BASELINE: |
| r.x += diffx/2; |
| alignOnBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.BASELINE_LEADING: |
| if (rightToLeft) { |
| r.x += diffx; |
| } |
| alignOnBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.BASELINE_TRAILING: |
| if (!rightToLeft) { |
| r.x += diffx; |
| } |
| alignOnBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.ABOVE_BASELINE: |
| r.x += diffx/2; |
| alignAboveBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.ABOVE_BASELINE_LEADING: |
| if (rightToLeft) { |
| r.x += diffx; |
| } |
| alignAboveBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.ABOVE_BASELINE_TRAILING: |
| if (!rightToLeft) { |
| r.x += diffx; |
| } |
| alignAboveBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.BELOW_BASELINE: |
| r.x += diffx/2; |
| alignBelowBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.BELOW_BASELINE_LEADING: |
| if (rightToLeft) { |
| r.x += diffx; |
| } |
| alignBelowBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.BELOW_BASELINE_TRAILING: |
| if (!rightToLeft) { |
| r.x += diffx; |
| } |
| alignBelowBaseline(constraints, r, cellY, cellHeight); |
| break; |
| case GridBagConstraints.CENTER: |
| r.x += diffx/2; |
| r.y += diffy/2; |
| break; |
| case GridBagConstraints.PAGE_START: |
| case GridBagConstraints.NORTH: |
| r.x += diffx/2; |
| break; |
| case GridBagConstraints.NORTHEAST: |
| r.x += diffx; |
| break; |
| case GridBagConstraints.EAST: |
| r.x += diffx; |
| r.y += diffy/2; |
| break; |
| case GridBagConstraints.SOUTHEAST: |
| r.x += diffx; |
| r.y += diffy; |
| break; |
| case GridBagConstraints.PAGE_END: |
| case GridBagConstraints.SOUTH: |
| r.x += diffx/2; |
| r.y += diffy; |
| break; |
| case GridBagConstraints.SOUTHWEST: |
| r.y += diffy; |
| break; |
| case GridBagConstraints.WEST: |
| r.y += diffy/2; |
| break; |
| case GridBagConstraints.NORTHWEST: |
| break; |
| case GridBagConstraints.LINE_START: |
| if (rightToLeft) { |
| r.x += diffx; |
| } |
| r.y += diffy/2; |
| break; |
| case GridBagConstraints.LINE_END: |
| if (!rightToLeft) { |
| r.x += diffx; |
| } |
| r.y += diffy/2; |
| break; |
| case GridBagConstraints.FIRST_LINE_START: |
| if (rightToLeft) { |
| r.x += diffx; |
| } |
| break; |
| case GridBagConstraints.FIRST_LINE_END: |
| if (!rightToLeft) { |
| r.x += diffx; |
| } |
| break; |
| case GridBagConstraints.LAST_LINE_START: |
| if (rightToLeft) { |
| r.x += diffx; |
| } |
| r.y += diffy; |
| break; |
| case GridBagConstraints.LAST_LINE_END: |
| if (!rightToLeft) { |
| r.x += diffx; |
| } |
| r.y += diffy; |
| break; |
| default: |
| throw new IllegalArgumentException("illegal anchor value"); |
| } |
| } |
| |
| /** |
| * Positions on the baseline. |
| * |
| * @param cellY the location of the row, does not include insets |
| * @param cellHeight the height of the row, does not take into account |
| * insets |
| * @param r available bounds for the component, is padded by insets and |
| * ipady |
| */ |
| private void alignOnBaseline(GridBagConstraints cons, Rectangle r, |
| int cellY, int cellHeight) { |
| if (cons.ascent >= 0) { |
| if (cons.baselineResizeBehavior == Component. |
| BaselineResizeBehavior.CONSTANT_DESCENT) { |
| // Anchor to the bottom. |
| // Baseline is at (cellY + cellHeight - maxDescent). |
| // Bottom of component (maxY) is at baseline + descent |
| // of component. We need to subtract the bottom inset here |
| // as the descent in the constraints object includes the |
| // bottom inset. |
| int maxY = cellY + cellHeight - |
| layoutInfo.maxDescent[cons.tempY + cons.tempHeight - 1] + |
| cons.descent - cons.insets.bottom; |
| if (!cons.isVerticallyResizable()) { |
| // Component not resizable, calculate y location |
| // from maxY - height. |
| r.y = maxY - cons.minHeight; |
| r.height = cons.minHeight; |
| } else { |
| // Component is resizable. As brb is constant descent, |
| // can expand component to fill region above baseline. |
| // Subtract out the top inset so that components insets |
| // are honored. |
| r.height = maxY - cellY - cons.insets.top; |
| } |
| } |
| else { |
| // BRB is not constant_descent |
| int baseline; // baseline for the row, relative to cellY |
| // Component baseline, includes insets.top |
| int ascent = cons.ascent; |
| if (layoutInfo.hasConstantDescent(cons.tempY)) { |
| // Mixed ascent/descent in same row, calculate position |
| // off maxDescent |
| baseline = cellHeight - layoutInfo.maxDescent[cons.tempY]; |
| } |
| else { |
| // Only ascents/unknown in this row, anchor to top |
| baseline = layoutInfo.maxAscent[cons.tempY]; |
| } |
| if (cons.baselineResizeBehavior == Component. |
| BaselineResizeBehavior.OTHER) { |
| // BRB is other, which means we can only determine |
| // the baseline by asking for it again giving the |
| // size we plan on using for the component. |
| boolean fits = false; |
| ascent = componentAdjusting.getBaseline(r.width, r.height); |
| if (ascent >= 0) { |
| // Component has a baseline, pad with top inset |
| // (this follows from calculateBaseline which |
| // does the same). |
| ascent += cons.insets.top; |
| } |
| if (ascent >= 0 && ascent <= baseline) { |
| // Components baseline fits within rows baseline. |
| // Make sure the descent fits within the space as well. |
| if (baseline + (r.height - ascent - cons.insets.top) <= |
| cellHeight - cons.insets.bottom) { |
| // It fits, we're good. |
| fits = true; |
| } |
| else if (cons.isVerticallyResizable()) { |
| // Doesn't fit, but it's resizable. Try |
| // again assuming we'll get ascent again. |
| int ascent2 = componentAdjusting.getBaseline( |
| r.width, cellHeight - cons.insets.bottom - |
| baseline + ascent); |
| if (ascent2 >= 0) { |
| ascent2 += cons.insets.top; |
| } |
| if (ascent2 >= 0 && ascent2 <= ascent) { |
| // It'll fit |
| r.height = cellHeight - cons.insets.bottom - |
| baseline + ascent; |
| ascent = ascent2; |
| fits = true; |
| } |
| } |
| } |
| if (!fits) { |
| // Doesn't fit, use min size and original ascent |
| ascent = cons.ascent; |
| r.width = cons.minWidth; |
| r.height = cons.minHeight; |
| } |
| } |
| // Reset the components y location based on |
| // components ascent and baseline for row. Because ascent |
| // includes the baseline |
| r.y = cellY + baseline - ascent + cons.insets.top; |
| if (cons.isVerticallyResizable()) { |
| switch(cons.baselineResizeBehavior) { |
| case CONSTANT_ASCENT: |
| r.height = Math.max(cons.minHeight,cellY + cellHeight - |
| r.y - cons.insets.bottom); |
| break; |
| case CENTER_OFFSET: |
| { |
| int upper = r.y - cellY - cons.insets.top; |
| int lower = cellY + cellHeight - r.y - |
| cons.minHeight - cons.insets.bottom; |
| int delta = Math.min(upper, lower); |
| delta += delta; |
| if (delta > 0 && |
| (cons.minHeight + cons.centerPadding + |
| delta) / 2 + cons.centerOffset != baseline) { |
| // Off by 1 |
| delta--; |
| } |
| r.height = cons.minHeight + delta; |
| r.y = cellY + baseline - |
| (r.height + cons.centerPadding) / 2 - |
| cons.centerOffset; |
| } |
| break; |
| case OTHER: |
| // Handled above |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| } |
| else { |
| centerVertically(cons, r, cellHeight); |
| } |
| } |
| |
| /** |
| * Positions the specified component above the baseline. That is |
| * the bottom edge of the component will be aligned along the baseline. |
| * If the row does not have a baseline, this centers the component. |
| */ |
| private void alignAboveBaseline(GridBagConstraints cons, Rectangle r, |
| int cellY, int cellHeight) { |
| if (layoutInfo.hasBaseline(cons.tempY)) { |
| int maxY; // Baseline for the row |
| if (layoutInfo.hasConstantDescent(cons.tempY)) { |
| // Prefer descent |
| maxY = cellY + cellHeight - layoutInfo.maxDescent[cons.tempY]; |
| } |
| else { |
| // Prefer ascent |
| maxY = cellY + layoutInfo.maxAscent[cons.tempY]; |
| } |
| if (cons.isVerticallyResizable()) { |
| // Component is resizable. Top edge is offset by top |
| // inset, bottom edge on baseline. |
| r.y = cellY + cons.insets.top; |
| r.height = maxY - r.y; |
| } |
| else { |
| // Not resizable. |
| r.height = cons.minHeight + cons.ipady; |
| r.y = maxY - r.height; |
| } |
| } |
| else { |
| centerVertically(cons, r, cellHeight); |
| } |
| } |
| |
| /** |
| * Positions below the baseline. |
| */ |
| private void alignBelowBaseline(GridBagConstraints cons, Rectangle r, |
| int cellY, int cellHeight) { |
| if (layoutInfo.hasBaseline(cons.tempY)) { |
| if (layoutInfo.hasConstantDescent(cons.tempY)) { |
| // Prefer descent |
| r.y = cellY + cellHeight - layoutInfo.maxDescent[cons.tempY]; |
| } |
| else { |
| // Prefer ascent |
| r.y = cellY + layoutInfo.maxAscent[cons.tempY]; |
| } |
| if (cons.isVerticallyResizable()) { |
| r.height = cellY + cellHeight - r.y - cons.insets.bottom; |
| } |
| } |
| else { |
| centerVertically(cons, r, cellHeight); |
| } |
| } |
| |
| private void centerVertically(GridBagConstraints cons, Rectangle r, |
| int cellHeight) { |
| if (!cons.isVerticallyResizable()) { |
| r.y += Math.max(0, (cellHeight - cons.insets.top - |
| cons.insets.bottom - cons.minHeight - |
| cons.ipady) / 2); |
| } |
| } |
| |
| /** |
| * Figures out the minimum size of the |
| * master based on the information from <code>getLayoutInfo</code>. |
| * This method should only be used internally by |
| * <code>GridBagLayout</code>. |
| * |
| * @param parent the layout container |
| * @param info the layout info for this parent |
| * @return a <code>Dimension</code> object containing the |
| * minimum size |
| * @since 1.4 |
| */ |
| protected Dimension getMinSize(Container parent, GridBagLayoutInfo info) { |
| return GetMinSize(parent, info); |
| } |
| |
| /** |
| * This method is obsolete and supplied for backwards |
| * compatability only; new code should call {@link |
| * #getMinSize(java.awt.Container, GridBagLayoutInfo) getMinSize} instead. |
| * This method is the same as <code>getMinSize</code>; |
| * refer to <code>getMinSize</code> for details on parameters |
| * and return value. |
| */ |
| protected Dimension GetMinSize(Container parent, GridBagLayoutInfo info) { |
| Dimension d = new Dimension(); |
| int i, t; |
| Insets insets = parent.getInsets(); |
| |
| t = 0; |
| for(i = 0; i < info.width; i++) |
| t += info.minWidth[i]; |
| d.width = t + insets.left + insets.right; |
| |
| t = 0; |
| for(i = 0; i < info.height; i++) |
| t += info.minHeight[i]; |
| d.height = t + insets.top + insets.bottom; |
| |
| return d; |
| } |
| |
| transient boolean rightToLeft = false; |
| |
| /** |
| * Lays out the grid. |
| * This method should only be used internally by |
| * <code>GridBagLayout</code>. |
| * |
| * @param parent the layout container |
| * @since 1.4 |
| */ |
| protected void arrangeGrid(Container parent) { |
| ArrangeGrid(parent); |
| } |
| |
| /** |
| * This method is obsolete and supplied for backwards |
| * compatability only; new code should call {@link |
| * #arrangeGrid(Container) arrangeGrid} instead. |
| * This method is the same as <code>arrangeGrid</code>; |
| * refer to <code>arrangeGrid</code> for details on the |
| * parameter. |
| */ |
| protected void ArrangeGrid(Container parent) { |
| Component comp; |
| int compindex; |
| GridBagConstraints constraints; |
| Insets insets = parent.getInsets(); |
| Component components[] = parent.getComponents(); |
| Dimension d; |
| Rectangle r = new Rectangle(); |
| int i, diffw, diffh; |
| double weight; |
| GridBagLayoutInfo info; |
| |
| rightToLeft = !parent.getComponentOrientation().isLeftToRight(); |
| |
| /* |
| * If the parent has no slaves anymore, then don't do anything |
| * at all: just leave the parent's size as-is. |
| */ |
| if (components.length == 0 && |
| (columnWidths == null || columnWidths.length == 0) && |
| (rowHeights == null || rowHeights.length == 0)) { |
| return; |
| } |
| |
| /* |
| * Pass #1: scan all the slaves to figure out the total amount |
| * of space needed. |
| */ |
| |
| info = getLayoutInfo(parent, PREFERREDSIZE); |
| d = getMinSize(parent, info); |
| |
| if (parent.width < d.width || parent.height < d.height) { |
| info = getLayoutInfo(parent, MINSIZE); |
| d = getMinSize(parent, info); |
| } |
| |
| layoutInfo = info; |
| r.width = d.width; |
| r.height = d.height; |
| |
| /* |
| * DEBUG |
| * |
| * DumpLayoutInfo(info); |
| * for (compindex = 0 ; compindex < components.length ; compindex++) { |
| * comp = components[compindex]; |
| * if (!comp.isVisible()) |
| * continue; |
| * constraints = lookupConstraints(comp); |
| * DumpConstraints(constraints); |
| * } |
| * System.out.println("minSize " + r.width + " " + r.height); |
| */ |
| |
| /* |
| * If the current dimensions of the window don't match the desired |
| * dimensions, then adjust the minWidth and minHeight arrays |
| * according to the weights. |
| */ |
| |
| diffw = parent.width - r.width; |
| if (diffw != 0) { |
| weight = 0.0; |
| for (i = 0; i < info.width; i++) |
| weight += info.weightX[i]; |
| if (weight > 0.0) { |
| for (i = 0; i < info.width; i++) { |
| int dx = (int)(( ((double)diffw) * info.weightX[i]) / weight); |
| info.minWidth[i] += dx; |
| r.width += dx; |
| if (info.minWidth[i] < 0) { |
| r.width -= info.minWidth[i]; |
| info.minWidth[i] = 0; |
| } |
| } |
| } |
| diffw = parent.width - r.width; |
| } |
| |
| else { |
| diffw = 0; |
| } |
| |
| diffh = parent.height - r.height; |
| if (diffh != 0) { |
| weight = 0.0; |
| for (i = 0; i < info.height; i++) |
| weight += info.weightY[i]; |
| if (weight > 0.0) { |
| for (i = 0; i < info.height; i++) { |
| int dy = (int)(( ((double)diffh) * info.weightY[i]) / weight); |
| info.minHeight[i] += dy; |
| r.height += dy; |
| if (info.minHeight[i] < 0) { |
| r.height -= info.minHeight[i]; |
| info.minHeight[i] = 0; |
| } |
| } |
| } |
| diffh = parent.height - r.height; |
| } |
| |
| else { |
| diffh = 0; |
| } |
| |
| /* |
| * DEBUG |
| * |
| * System.out.println("Re-adjusted:"); |
| * DumpLayoutInfo(info); |
| */ |
| |
| /* |
| * Now do the actual layout of the slaves using the layout information |
| * that has been collected. |
| */ |
| |
| info.startx = diffw/2 + insets.left; |
| info.starty = diffh/2 + insets.top; |
| |
| for (compindex = 0 ; compindex < components.length ; compindex++) { |
| comp = components[compindex]; |
| if (!comp.isVisible()){ |
| continue; |
| } |
| constraints = lookupConstraints(comp); |
| |
| if (!rightToLeft) { |
| r.x = info.startx; |
| for(i = 0; i < constraints.tempX; i++) |
| r.x += info.minWidth[i]; |
| } else { |
| r.x = parent.width - (diffw/2 + insets.right); |
| for(i = 0; i < constraints.tempX; i++) |
| r.x -= info.minWidth[i]; |
| } |
| |
| r.y = info.starty; |
| for(i = 0; i < constraints.tempY; i++) |
| r.y += info.minHeight[i]; |
| |
| r.width = 0; |
| for(i = constraints.tempX; |
| i < (constraints.tempX + constraints.tempWidth); |
| i++) { |
| r.width += info.minWidth[i]; |
| } |
| |
| r.height = 0; |
| for(i = constraints.tempY; |
| i < (constraints.tempY + constraints.tempHeight); |
| i++) { |
| r.height += info.minHeight[i]; |
| } |
| |
| componentAdjusting = comp; |
| adjustForGravity(constraints, r); |
| |
| /* fix for 4408108 - components were being created outside of the container */ |
| /* fix for 4969409 "-" replaced by "+" */ |
| if (r.x < 0) { |
| r.width += r.x; |
| r.x = 0; |
| } |
| |
| if (r.y < 0) { |
| r.height += r.y; |
| r.y = 0; |
| } |
| |
| /* |
| * If the window is too small to be interesting then |
| * unmap it. Otherwise configure it and then make sure |
| * it's mapped. |
| */ |
| |
| if ((r.width <= 0) || (r.height <= 0)) { |
| comp.setBounds(0, 0, 0, 0); |
| } |
| else { |
| if (comp.x != r.x || comp.y != r.y || |
| comp.width != r.width || comp.height != r.height) { |
| comp.setBounds(r.x, r.y, r.width, r.height); |
| } |
| } |
| } |
| } |
| |
| // Added for serial backwards compatability (4348425) |
| static final long serialVersionUID = 8838754796412211005L; |
| } |
