+++ /dev/null
-// CardLayout.java - Card-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.util.Enumeration;
-import java.util.Hashtable;
-import java.io.Serializable;
-
-/** This class implements a card-based layout scheme. Each included
- * component is treated as a card. Only one card can be shown at a
- * time. This class includes methods for changing which card is
- * shown.
- *
- * @author Tom Tromey <tromey@redhat.com>
- * @author Aaron M. Renn (arenn@urbanophile.com)
- */
-public class CardLayout implements LayoutManager2, Serializable
-{
- /**
- * Initializes a new instance of <code>CardLayout</code> with horizontal
- * and vertical gaps of 0.
- */
- public CardLayout ()
- {
- this (0, 0);
- }
-
- /**
- * Create a new <code>CardLayout</code> object with the specified
- * horizontal and vertical gaps.
- * @param hgap The horizontal gap
- * @param vgap The vertical gap
- */
- public CardLayout (int hgap, int vgap)
- {
- this.hgap = hgap;
- this.vgap = vgap;
- this.tab = new Hashtable ();
- }
-
- /** Add a new component to the layout. The constraint must be a
- * string which is used to name the component. This string can
- * later be used to refer to the particular component.
- * @param comp The component to add
- * @param constraints The name by which the component can later be called
- * @exception IllegalArgumentException If `constraints' is not a
- * <code>String</code>
- */
- public void addLayoutComponent (Component comp, Object constraints)
- {
- if (! (constraints instanceof String))
- throw new IllegalArgumentException ("Object " + constraints
- + " is not a string");
- tab.put (constraints, comp);
- }
-
- /** Add a new component to the layout. The name can be used later
- * to refer to the component.
- * @param name The name by which the component can later be called
- * @param comp The component to add
- * @deprecated This method is deprecated in favor of
- * <code>addLayoutComponent(Component, Object)</code>.
- */
- public void addLayoutComponent (String name, Component comp)
- {
- addLayoutComponent (comp, name);
- }
-
- /** Cause the first component in the container to be displayed.
- * @param parent The parent container
- */
- public void first (Container parent)
- {
- gotoComponent (parent, FIRST, null);
- }
-
- /** Return this layout manager's horizontal gap. */
- public int getHgap ()
- {
- return hgap;
- }
-
- /** Return this layout manager's x alignment. This method always
- * returns Component.CENTER_ALIGNMENT.
- * @param parent Container using this layout manager instance
- */
- public float getLayoutAlignmentX (Container parent)
- {
- return Component.CENTER_ALIGNMENT;
- }
-
- /** Returns this layout manager's y alignment. This method always
- * returns Component.CENTER_ALIGNMENT.
- * @param parent Container using this layout manager instance
- */
- public float getLayoutAlignmentY (Container parent)
- {
- return Component.CENTER_ALIGNMENT;
- }
-
- /** Return this layout manager's vertical gap. */
- public int getVgap ()
- {
- return vgap;
- }
-
- /** Invalidate this layout manager's state. */
- public void invalidateLayout (Container target)
- {
- // Do nothing.
- }
-
- /** Cause the last component in the container to be displayed.
- * @param parent The parent container
- */
- public void last (Container parent)
- {
- gotoComponent (parent, LAST, null);
- }
-
- /**
- * Lays out the container. This is done by resizing the child components
- * to be the same size as the parent, less insets and gaps.
- *
- * @param parent The parent container.
- */
- public void layoutContainer (Container parent)
- {
- int width = parent.width;
- int height = parent.height;
-
- Insets ins = parent.getInsets ();
-
- int num = parent.ncomponents;
- Component[] comps = parent.component;
-
- int x = ins.left + hgap;
- int y = ins.top + vgap;
- width = width - 2 * hgap - ins.left - ins.right;
- height = height - 2 * vgap - ins.top - ins.bottom;
-
- for (int i = 0; i < num; ++i)
- comps[i].setBounds (x, y, width, height);
- }
-
- /** Get the maximum layout size of the container.
- * @param target The parent container
- */
- public Dimension maximumLayoutSize (Container target)
- {
- // The JCL says that this returns Integer.MAX_VALUE for both
- // dimensions. But that just seems wrong to me.
- return getSize (target, MAX);
- }
-
- /** Get the minimum layout size of the container.
- * @param target The parent container
- */
- public Dimension minimumLayoutSize (Container target)
- {
- return getSize (target, MIN);
- }
-
- /** Cause the next component in the container to be displayed. If
- * this current card is the last one in the deck, the first
- * component is displayed.
- * @param parent The parent container
- */
- public void next (Container parent)
- {
- gotoComponent (parent, NEXT, null);
- }
-
- /** Get the preferred layout size of the container.
- * @param target The parent container
- */
- public Dimension preferredLayoutSize (Container parent)
- {
- return getSize (parent, PREF);
- }
-
- /** Cause the previous component in the container to be displayed.
- * If this current card is the first one in the deck, the last
- * component is displayed.
- * @param parent The parent container
- */
- public void previous (Container parent)
- {
- gotoComponent (parent, PREV, null);
- }
-
- /** Remove the indicated component from this layout manager.
- * @param comp The component to remove
- */
- public void removeLayoutComponent (Component comp)
- {
- Enumeration e = tab.keys ();
- while (e.hasMoreElements ())
- {
- Object key = e.nextElement ();
- if (tab.get (key) == comp)
- {
- tab.remove (key);
- break;
- }
- }
- }
-
- /** Set this layout manager's horizontal gap.
- * @param hgap The new gap
- */
- public void setHgap (int hgap)
- {
- this.hgap = hgap;
- }
-
- /** Set this layout manager's vertical gap.
- * @param vgap The new gap
- */
- public void setVgap (int vgap)
- {
- this.vgap = vgap;
- }
-
- /** Cause the named component to be shown. If the component name is
- * unknown, this method does nothing.
- * @param parent The parent container
- * @param name The name of the component to show
- */
- public void show (Container parent, String name)
- {
- Object target = tab.get (name);
- if (target != null)
- gotoComponent (parent, NONE, (Component) target);
- }
-
- /**
- * Returns a string representation of this layout manager.
- *
- * @return A string representation of this object.
- */
- public String toString ()
- {
- return getClass ().getName () + "[" + hgap + "," + vgap + "]";
- }
-
- // This implements first(), last(), next(), and previous().
- private void gotoComponent (Container parent, int what,
- Component target)
- {
- int num = parent.ncomponents;
- // This is more efficient than calling getComponents().
- Component[] comps = parent.component;
- int choice = -1;
-
- if (what == FIRST)
- choice = 0;
- else if (what == LAST)
- choice = num - 1;
- else if (what >= 0)
- choice = what;
-
- for (int i = 0; i < num; ++i)
- {
- // If TARGET is set then we are looking for a specific
- // component.
- if (target != null)
- {
- if (target == comps[i])
- choice = i;
- }
-
- if (comps[i].isVisible ())
- {
- if (what == NEXT)
- {
- choice = i + 1;
- if (choice == num)
- choice = 0;
- }
- else if (what == PREV)
- {
- choice = i - 1;
- if (choice < 0)
- choice = num - 1;
- }
- else if (choice == i)
- {
- // Do nothing if we're already looking at the right
- // component.
- return;
- }
- comps[i].setVisible (false);
-
- if (choice >= 0)
- break;
- }
- }
-
- if (choice >= 0 && choice < num)
- comps[choice].setVisible (true);
- }
-
- // Compute the size according to WHAT.
- private Dimension getSize (Container parent, int what)
- {
- int w = 0, h = 0, num = parent.ncomponents;
- Component[] comps = parent.component;
-
- for (int i = 0; i < num; ++i)
- {
- Dimension d;
-
- if (what == MIN)
- d = comps[i].getMinimumSize ();
- else if (what == MAX)
- d = comps[i].getMaximumSize ();
- else
- d = comps[i].getPreferredSize ();
-
- w = Math.max (d.width, w);
- h = Math.max (d.height, h);
- }
-
- Insets i = parent.getInsets ();
- w += 2 * hgap + i.right + i.left;
- h += 2 * vgap + i.bottom + i.top;
-
- // Handle overflow.
- if (w < 0)
- w = Integer.MAX_VALUE;
- if (h < 0)
- h = Integer.MAX_VALUE;
-
- return new Dimension (w, h);
- }
-
- /**
- * @serial Horizontal gap value.
- */
- private int hgap;
-
- /**
- * @serial Vertical gap value.
- */
- private int vgap;
-
- /**
- * @serial Table of named components.
- */
- private Hashtable tab;
-
- // These constants are used by the private gotoComponent method.
- private int FIRST = 0;
- private int LAST = 1;
- private int NEXT = 2;
- private int PREV = 3;
- private int NONE = 4;
-
- // These constants are used by the private getSize method.
- private int MIN = 0;
- private int MAX = 1;
- private int PREF = 2;
-}
projects / msp430-gcc.git / blobdiff