+++ /dev/null
-// GridLayout.java - Grid-based layout engine
-
-/* Copyright (C) 1999, 2000, 2002 Free Software Foundation
-
-This file is part of GNU Classpath.
-
-GNU Classpath 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.
-
-GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library 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 library. If you modify this library, 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. */
-
-
-package java.awt;
-
-import java.io.Serializable;
-
-/** This class implements a grid-based layout scheme. Components are
- * all given the same size and are laid out from left to right and top
- * to bottom. A GridLayout is configured with a number of rows and a
- * number of columns. If both are specified, then the number of
- * columns is ignored and is derived from the number of rows and the
- * total number of components. If either is zero then that dimension
- * is computed based on the actual size of the container. An
- * exception is thrown if an attempt is made to set both the number of
- * rows and the number of columns to 0. This class also supports
- * horizontal and vertical gaps; these are used as spacing between
- * cells.
- *
- * @author Tom Tromey <tromey@redhat.com>
- * @author Aaron M. Renn (arenn@urbanophile.com)
- */
-public class GridLayout implements LayoutManager, Serializable
-{
- /** Add a new component to the layout. This particular implementation
- * does nothing.
- * @param name The name of the component to add.
- * @param component The component to add.
- */
- public void addLayoutComponent (String name, Component comp)
- {
- // Nothing.
- }
-
- /** Return the number of columns in this layout. */
- public int getColumns ()
- {
- return cols;
- }
-
- /** Return the horizontal gap. */
- public int getHgap ()
- {
- return hgap;
- }
-
- /** Return the number of rows in this layout. */
- public int getRows ()
- {
- return rows;
- }
-
- /** Return the vertical gap. */
- public int getVgap ()
- {
- return vgap;
- }
-
- /** Create a new <code>GridLayout</code> with one row and any number
- * of columns. Both gaps are set to 0.
- */
- public GridLayout ()
- {
- this (1, 0, 0, 0);
- }
-
- /** Create a new <code>GridLayout</code> with the specified number
- * of rows and columns. Both gaps are set to 0. Note that the row
- * and column settings cannot both be zero. If both the row and
- * column values are non-zero, the rows value takes precedence.
- * @param rows Number of rows
- * @param cols Number of columns
- * @exception IllegalArgumentException If rows and columns are both
- * 0, or if either are negative
- */
- public GridLayout (int rows, int cols)
- {
- this (rows, cols, 0, 0);
- }
-
- /** Create a new GridLayout with the specified number of rows and
- * columns and the specified gaps.
- * Note that the row and column settings cannot both be
- * zero. If both the row and column values are non-zero, the rows value
- * takes precedence.
- * @param rows Number of rows
- * @param cols Number of columns
- * @param hgap The horizontal gap
- * @param vgap The vertical gap
- * @exception IllegalArgumentException If rows and columns are both
- * 0, if either are negative, or if either gap is negative
- */
- public GridLayout (int rows, int cols, int hgap, int vgap)
- {
- if (rows < 0)
- throw new IllegalArgumentException ("number of rows cannot be negative");
- if (cols < 0)
- throw new IllegalArgumentException ("number of columns cannot be negative");
- if (rows == 0 && cols == 0)
- throw new IllegalArgumentException ("both rows and columns cannot be 0");
- if (hgap < 0)
- throw new IllegalArgumentException ("horizontal gap must be nonnegative");
- if (vgap < 0)
- throw new IllegalArgumentException ("vertical gap must be nonnegative");
- this.rows = rows;
- this.cols = cols;
- this.hgap = hgap;
- this.vgap = vgap;
- }
-
- /** Lay out the container's components based on current settings.
- * The free space in the container is divided evenly into the specified
- * number of rows and columns in this object.
- * @param parent The container to lay out
- */
- public void layoutContainer (Container parent)
- {
- int num = parent.ncomponents;
- // This is more efficient than calling getComponents().
- Component[] comps = parent.component;
-
- int real_rows = rows;
- int real_cols = cols;
- if (real_rows == 0)
- real_rows = (num + real_cols - 1) / real_cols;
- else
- real_cols = (num + real_rows - 1) / real_rows;
-
- // We might have less than a single row. In this case we expand
- // to fill.
- if (num < real_cols)
- real_cols = num;
-
- Dimension d = parent.getSize ();
- Insets ins = parent.getInsets ();
-
- // Compute width and height of each cell in the grid.
- int tw = d.width - ins.left - ins.right;
- tw = (tw - (real_cols - 1) * hgap) / real_cols;
- int th = d.height - ins.top - ins.bottom;
- th = (th - (real_rows - 1) * vgap) / real_rows;
-
- // If the cells are too small, still try to do something.
- if (tw < 0)
- tw = 1;
- if (th < 0)
- th = 1;
-
- int x = ins.left;
- int y = ins.top;
- int i = 0;
- int recount = 0;
-
- while (i < num)
- {
- comps[i].setBounds (x, y, tw, th);
-
- ++i;
- ++recount;
- if (recount == real_cols)
- {
- recount = 0;
- y += vgap + th;
- x = ins.left;
- }
- else
- x += hgap + tw;
- }
- }
-
- /** Get the minimum layout size of the container.
- * @param cont The parent container
- */
- public Dimension minimumLayoutSize (Container cont)
- {
- return getSize (cont, true);
- }
-
- /** Get the preferred layout size of the container.
- * @param cont The parent container
- */
- public Dimension preferredLayoutSize (Container cont)
- {
- return getSize (cont, false);
- }
-
- /** Remove the indicated component from this layout manager.
- * This particular implementation does nothing.
- * @param comp The component to remove
- */
- public void removeLayoutComponent (Component comp)
- {
- // Nothing.
- }
-
- /** Set the number of columns.
- * @param newCols
- * @exception IllegalArgumentException If the number of columns is
- * negative, or if the number of columns is zero and the number
- * of rows is already 0.
- */
- public void setColumns (int newCols)
- {
- if (cols < 0)
- throw new IllegalArgumentException ("number of columns cannot be negative");
- if (newCols == 0 && rows == 0)
- throw new IllegalArgumentException ("number of rows is already 0");
- this.cols = newCols;
- }
-
- /** Set the horizontal gap
- * @param hgap The horizontal gap
- * @exception IllegalArgumentException If the hgap value is less than zero.
- */
- public void setHgap (int hgap)
- {
- if (hgap < 0)
- throw new IllegalArgumentException ("horizontal gap must be nonnegative");
- this.hgap = hgap;
- }
-
- /** Set the number of rows
- * @param newRows
- * @exception IllegalArgumentException If the number of rows is
- * negative, or if the number of rows is zero and the number
- * of columns is already 0.
- */
- public void setRows (int newRows)
- {
- if (rows < 0)
- throw new IllegalArgumentException ("number of rows cannot be negative");
- if (newRows == 0 && cols == 0)
- throw new IllegalArgumentException ("number of columns is already 0");
- this.rows = newRows;
- }
-
- /** Set the vertical gap.
- * @param vgap The vertical gap
- * @exception IllegalArgumentException If the vgap value is less than zero.
- */
- public void setVgap (int vgap)
- {
- if (vgap < 0)
- throw new IllegalArgumentException ("vertical gap must be nonnegative");
- this.vgap = vgap;
- }
-
- /** Return String description of this object. */
- public String toString ()
- {
- return ("[" + getClass ().getName ()
- + ",hgap=" + hgap + ",vgap=" + vgap
- + ",rows=" + rows + ",cols=" + cols
- + "]");
- }
-
- // This method is used to compute the various sizes.
- private Dimension getSize (Container parent, boolean is_min)
- {
- int w = 0, h = 0, num = parent.ncomponents;
- // This is more efficient than calling getComponents().
- Component[] comps = parent.component;
-
- for (int i = 0; i < num; ++i)
- {
- Dimension d;
-
- if (is_min)
- d = comps[i].getMinimumSize ();
- else
- d = comps[i].getPreferredSize ();
-
- w = Math.max (d.width, w);
- h = Math.max (d.height, h);
- }
-
- int real_rows = rows;
- int real_cols = cols;
- if (real_rows == 0)
- real_rows = (num + real_cols - 1) / real_cols;
- else
- real_cols = (num + real_rows - 1) / real_rows;
-
- Insets ins = parent.getInsets ();
- // We subtract out an extra gap here because the gaps are only
- // between cells.
- w = ins.left + ins.right + real_cols * (w + hgap) - hgap;
- h = ins.top + ins.bottom + real_rows * (h + vgap) - vgap;
- return new Dimension (w, h);
- }
-
- /**
- * @serial The number of columns in the grid.
- */
- private int cols;
-
- /**
- * @serial The number of rows in the grid.
- */
- private int rows;
-
- /**
- * @serial The horizontal gap between columns
- */
- private int hgap;
-
- /**
- * @serial The vertical gap between rows
- */
- private int vgap;
-}
projects / msp430-gcc.git / blobdiff