--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/draw2d/AbstractLabeledBorder.d	Sun Aug 03 00:52:14 2008 +0200
@@ -0,0 +1,173 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.draw2d.AbstractLabeledBorder;
+
+import dwt.dwthelper.utils;
+
+
+
+import dwt.graphics.Color;
+import dwt.graphics.Font;
+import dwtx.draw2d.geometry.Dimension;
+import dwtx.draw2d.geometry.Insets;
+import dwtx.draw2d.AbstractBorder;
+import dwtx.draw2d.LabeledBorder;
+import dwtx.draw2d.IFigure;
+import dwtx.draw2d.ColorConstants;
+import dwtx.draw2d.FigureUtilities;
+
+/**
+ * Provides support for a border with a label describing the contents of which it is
+ * surrounding.
+ */
+public abstract class AbstractLabeledBorder
+    : AbstractBorder
+    , LabeledBorder
+{
+
+private Dimension textExtents;
+private String label;
+private Insets insets;
+private Color textColor;
+private Font font;
+
+/**
+ * Constructs a default AbstractLabeledBorder with the name of this class set as its
+ * label.
+ *
+ * @since 2.0
+ */
+public this() {
+    textColor = ColorConstants.black;
+    String className = this.classinfo.name;
+    setLabel(className.substring(className.lastIndexOf('.') + 1, className.length));
+}
+
+/**
+ * Constructs a border with the label set to the String passed in as input.
+ *
+ * @param s  Label to be set on the border
+ * @since 2.0
+ */
+public this(String s) {
+    textColor = ColorConstants.black;
+    setLabel(s);
+}
+
+/**
+ * Calculates insets based on the current font and other attributes. This value will be
+ * cached until {@link #invalidate()} is called.
+ * @param figure The figure to which the border is being applied
+ * @return The Insets
+ */
+protected abstract Insets calculateInsets(IFigure figure);
+
+/**
+ * Returns the font that this border will use. If no Font has been specified, the font
+ * associated with the input Figure will be used.
+ * @param f Figure used to get a default font
+ * @return The font for this border
+ */
+protected Font getFont(IFigure f) {
+    if (font is null)
+        return f.getFont();
+    return font;
+}
+
+/**
+ * Returns the insets, or space associated for this border. Returns any previously set
+ * value if present, else calculates it from the Figure provided in as input.
+ * @param fig Figure used to calculate insets
+ * @return The insets
+ */
+public Insets getInsets(IFigure fig) {
+    if (insets is null)
+        insets = calculateInsets(fig);
+    return insets;
+}
+
+/**
+ * @see dwtx.draw2d.LabeledBorder#getLabel()
+ */
+public String getLabel() {
+    return label;
+}
+
+/**
+ * @see dwtx.draw2d.Border#getPreferredSize(IFigure)
+ */
+public Dimension getPreferredSize(IFigure fig) {
+    return new Dimension(getTextExtents(fig));
+}
+
+/**
+ * Returns the text Color of this AbstractLabeledBorder's label.
+ *
+ * @return The text color
+ * @since 2.0
+ */
+public Color getTextColor() {
+    return textColor;
+}
+
+/**
+ * Calculates and returns the size required by this border's label.
+ *
+ * @param f  IFigure on which the calculations are to be made
+ * @return   Dimensions required by the text of this border's label
+ * @since 2.0
+ */
+protected Dimension getTextExtents(IFigure f) {
+    if (textExtents is null)
+        textExtents = FigureUtilities.getTextExtents(label, getFont(f));
+    return textExtents;
+}
+
+/**
+ * Resets the internal values and state so that they can be recalculated. Called whenever
+ * a state  change has occurred that effects the insets or  text extents of this border.
+ */
+protected void invalidate() {
+    insets = null;
+    textExtents = null;
+}
+
+/**
+ * Sets the Font of this border to the input value, and invalidates the border forcing an
+ * update of internal parameters of insets and text extents.
+ * @param font The font
+ */
+public void setFont(Font font) {
+    this.font = font;
+    invalidate();
+}
+
+/**
+ * @see dwtx.draw2d.LabeledBorder#setLabel(String)
+ */
+public void setLabel(String s) {
+    label = ((s is null) ? "" : s);  //$NON-NLS-1$
+    invalidate();
+}
+
+/**
+ * Sets the color for this border's text.
+ *
+ * @param color  Color to be set for this border's text
+ * @since 2.0
+ */
+public void setTextColor(Color color) {
+    textColor = color;
+}
+
+}