+++ /dev/null
-// FlowLayout.java - Grid-based layout engine
-
-/* Copyright (C) 1999, 2000, 2001, 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 flow-based layout. Components are laid
- * out in order from left to right. When a component cannot be placed
- * without horizontal clipping, a new row is started. This class
- * supports horizontal and vertical gaps. These are used for spacing
- * between components.
- *
- * @author Tom Tromey <tromey@redhat.com>
- * @author Aaron M. Renn (arenn@urbanophile.com)
- */
-public class FlowLayout implements LayoutManager, Serializable
-{
- /** Constant that specifies left alignment. */
- public static final int LEFT = 0;
- /** Constant that specifies center alignment. */
- public static final int CENTER = 1;
- /** Constant that specifies right alignment. */
- public static final int RIGHT = 2;
-
- /** Constant that specifies alignment to leading edge of container's
- * orientation. */
- public static final int LEADING = 3;
- /** Constant that specifies alignment to trailing edge of container's
- * orientation. */
- public static final int TRAILING = 4;
-
- // Serialization constant
- private static final long serialVersionUID = -7262534875583282631L;
-
- /** Add a new component to the layout. This particular implementation
- * does nothing.
- */
- public void addLayoutComponent (String name, Component comp)
- {
- // Nothing.
- }
-
- /**
- * Returns the current justification value for this object.
- *
- * @return The current justification value for this object.
- */
- public int getAlignment ()
- {
- return align;
- }
-
- /**
- * Returns the horizontal gap between components.
- *
- * @return The horizontal gap between components.
- */
- public int getHgap ()
- {
- return hgap;
- }
-
- /**
- * Returns the vertical gap between lines of components.
- *
- * @return The vertical gap between lines of components.
- */
- public int getVgap ()
- {
- return vgap;
- }
-
- /**
- * Initializes a new instance of <code>FlowLayout</code> with a center
- * justification and a default horizontal and vertical gap of 5.
- */
- public FlowLayout ()
- {
- this (CENTER, 5, 5);
- }
-
- /**
- * Initializes a new instance of <code>FlowLayout</code> with the specified
- * justification and a default horizontal and vertical gap of 5.
- *
- * @param align The justification setting, which should be one of the
- * contants in this class.
- */
- public FlowLayout (int align)
- {
- this (align, 5, 5);
- }
-
- /**
- * Initializes a new instance of <code>FlowLayout</code> with the specified
- * justification and gap values
- * @param align Alignment
- * @param hgap The horizontal gap
- * @param vgap The vertical gap
- * @exception IllegalArgumentException If either gap is negative
- */
- public FlowLayout (int align, int hgap, int vgap)
- {
- // Use methods to set fields so that we can have all the checking
- // in one place.
- setVgap (vgap);
- setHgap (hgap);
- setAlignment (align);
- }
-
- /** Lay out the container's components based on current settings.
- * @param parent The parent container
- */
- public void layoutContainer (Container parent)
- {
- int num = parent.getComponentCount ();
- // This is more efficient than calling getComponents().
- Component[] comps = parent.component;
-
- Dimension d = parent.getSize ();
- Insets ins = parent.getInsets ();
-
- ComponentOrientation orient = parent.getComponentOrientation ();
- boolean left_to_right = orient.isLeftToRight ();
-
- int y = ins.top + vgap;
- int i = 0;
- while (i < num)
- {
- // Find the components which go in the current row.
- int new_w = ins.left + hgap + ins.right;
- int new_h = 0;
- int j;
- boolean found_one = false;
- for (j = i; j < num && ! found_one; ++j)
- {
- // Skip invisible items.
- if (! comps[i].visible)
- continue;
-
- Dimension c = comps[i].getPreferredSize ();
-
- int next_w = new_w + hgap + c.width;
- if (next_w <= d.width || ! found_one)
- {
- new_w = next_w;
- new_h = Math.max (new_h, c.height);
- found_one = true;
- }
- else
- {
- // Must start a new row, and we already found an item
- break;
- }
- }
-
- // Set the location of each component for this row.
- int x;
-
- int myalign = align;
- if (align == LEADING)
- myalign = left_to_right ? LEFT : RIGHT;
- else if (align == TRAILING)
- myalign = left_to_right ? RIGHT : LEFT;
-
- if (myalign == LEFT)
- x = ins.left + hgap;
- else if (myalign == CENTER)
- x = (d.width - new_w) / 2;
- else
- x = d.width - new_w;
-
- for (int k = i; k < j; ++k)
- {
- if (comps[k].visible)
- {
- Dimension c = comps[k].getPreferredSize ();
- comps[k].setBounds (x, y, c.width, new_h);
- x += c.width + hgap;
- }
- }
-
- // Advance to next row.
- i = j;
- y += new_h + vgap;
- }
- }
-
- /**
- * Returns the minimum layout size for the specified container using
- * this layout.
- * @param cont The parent container
- * @return The minimum layout size.
- */
- public Dimension minimumLayoutSize (Container cont)
- {
- return getSize (cont, true);
- }
-
- /**
- * Returns the preferred layout size for the specified container using
- * this layout.
- * @param cont The parent container
- * @return The preferred layout size.
- */
- 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.
- }
-
- /**
- * Sets the justification value for this object to the specified value.
- *
- * @param align The new justification value for this object, which must
- * be one of the constants in this class.
- */
- public void setAlignment (int align)
- {
- if (align != LEFT && align != RIGHT && align != CENTER
- && align != LEADING && align != TRAILING)
- throw new IllegalArgumentException ("invalid alignment: " + align);
- this.align = align;
- }
-
- /**
- * Sets the horizontal gap between components to the specified value.
- *
- * @param hgap The new horizontal gap between components.
- */
- public void setHgap (int hgap)
- {
- if (hgap < 0)
- throw new IllegalArgumentException ("horizontal gap must be nonnegative");
- this.hgap = hgap;
- }
-
- /**
- * Sets the vertical gap between lines of components to the specified value.
- *
- * @param vgap The new vertical gap.
- */
- 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.
- * @return A string representation of this object.
- */
- public String toString ()
- {
- return ("[" + getClass ().getName () + ",hgap=" + hgap + ",vgap=" + vgap
- + ",align=" + align + "]");
- }
-
- // This method is used to compute the various sizes.
- private Dimension getSize (Container parent, boolean is_min)
- {
- int w, h, num = parent.getComponentCount ();
- // This is more efficient than calling getComponents().
- Component[] comps = parent.component;
-
- w = 0;
- h = 0;
- for (int i = 0; i < num; ++i)
- {
- if (! comps[i].visible)
- continue;
-
- // FIXME: can we just directly read the fields in Component?
- // Or will that not work with subclassing?
- Dimension d;
-
- if (is_min)
- d = comps[i].getMinimumSize ();
- else
- d = comps[i].getPreferredSize ();
-
- w += d.width;
- h = Math.max (d.height, h);
- }
-
- Insets ins = parent.getInsets ();
-
- w += (num + 1) * hgap + ins.left + ins.right;
- h += 2 * vgap + ins.top + ins.bottom;
-
- return new Dimension (w, h);
- }
-
- /**
- * @serial The justification alignment of the lines of components, which
- * will be one of the constants defined in this class.
- */
- private int align;
-
- /**
- * @serial The horizontal gap between components.
- */
- private int hgap;
-
- /**
- * @serial The vertical gap between lines of components.
- */
- private int vgap;
-}
projects / msp430-gcc.git / blobdiff