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Diffstat (limited to 'libjava/classpath/java/awt/FlowLayout.java')
| -rw-r--r-- | libjava/classpath/java/awt/FlowLayout.java | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/libjava/classpath/java/awt/FlowLayout.java b/libjava/classpath/java/awt/FlowLayout.java deleted file mode 100644 index 231d041..0000000 --- a/libjava/classpath/java/awt/FlowLayout.java +++ /dev/null @@ -1,365 +0,0 @@ -/* FlowLayout.java -- Grid-based layout engine - Copyright (C) 1999, 2000, 2001, 2002, 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 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. - * - * @param name the name - * @param comp the component - */ - 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) - { - synchronized (parent.getTreeLock ()) - { - 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; ++j) - { - // Skip invisible items. - if (! comps[j].visible) - continue; - - Dimension c = comps[j].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 == RIGHT) - x = ins.left + (d.width - new_w) + hgap; - else if (myalign == CENTER) - x = ins.left + (d.width - new_w) / 2 + hgap; - else // LEFT and all other values of align. - x = ins.left + hgap; - - for (int k = i; k < j; ++k) - { - if (comps[k].visible) - { - Dimension c = comps[k].getPreferredSize (); - comps[k].setBounds (x, y + (new_h - c.height) / 2, - c.width, c.height); - 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) - { - // The JDK accepts invalid values and treats them as - // LEFT during layout, so do we. The invalid value is even stored, - // getAlignment() returns the same invalid value. - this.align = align; - } - - /** - * Sets the horizontal gap between lines of components to the specified value. - * No Exception is thrown if hgap < 0. - * - * @param hgap The new horizontal gap between components. - */ - public void setHgap (int hgap) - { - this.hgap = hgap; - } - - /** - * Sets the vertical gap between lines of components to the specified value. - * No Exception is thrown if vgap < 0. - * - * @param vgap The new vertical gap. - */ - public void setVgap (int vgap) - { - 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) - { - synchronized (parent.getTreeLock ()) - { - 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 (); - - if (num == 0) - w += 2 * hgap + ins.left + ins.right; - else - 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; -} |