--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface/src/org/eclipse/jface/preference/StringButtonFieldEditor.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,186 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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
+ *     Thierry Lach - thierry.lach@bbdodetroit.com - Fix for Bug 37155
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.jface.preference.StringButtonFieldEditor;
+
+import org.eclipse.jface.preference.StringFieldEditor;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.DisposeEvent;
+import org.eclipse.swt.events.DisposeListener;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.dialogs.IDialogConstants;
+import org.eclipse.jface.resource.JFaceResources;
+
+import java.lang.all;
+import java.util.Set;
+
+/**
+ * An abstract field editor for a string type preference that presents
+ * a string input field with a change button to its right to edit the
+ * input field's content. When the user presses the change button, the
+ * abstract framework method <code>changePressed()</code> gets called
+ * to compute a new string.
+ */
+public abstract class StringButtonFieldEditor : StringFieldEditor {
+
+    /**
+     * The change button, or <code>null</code> if none
+     * (before creation and after disposal).
+     */
+    private Button changeButton;
+
+    /**
+     * The text for the change button, or <code>null</code> if missing.
+     */
+    private String changeButtonText;
+
+    /**
+     * Creates a new string button field editor
+     */
+    protected this() {
+    }
+
+    /**
+     * Creates a string button field editor.
+     *
+     * @param name the name of the preference this field editor works on
+     * @param labelText the label text of the field editor
+     * @param parent the parent of the field editor's control
+     */
+    protected this(String name, String labelText,
+            Composite parent) {
+        init(name, labelText);
+        createControl(parent);
+    }
+
+    /* (non-Javadoc)
+     * Method declared on FieldEditor.
+     */
+    protected override void adjustForNumColumns(int numColumns) {
+        (cast(GridData) getTextControl().getLayoutData()).horizontalSpan = numColumns - 2;
+    }
+
+    /**
+     * Notifies that this field editor's change button has been pressed.
+     * <p>
+     * Subclasses must implement this method to provide a corresponding
+     * new string for the text field. If the returned value is <code>null</code>,
+     * the currently displayed value remains.
+     * </p>
+     *
+     * @return the new string to display, or <code>null</code> to leave the
+     *  old string showing
+     */
+    protected abstract String changePressed();
+
+    /* (non-Javadoc)
+     * Method declared on StringFieldEditor (and FieldEditor).
+     */
+    protected override void doFillIntoGrid(Composite parent, int numColumns) {
+        super.doFillIntoGrid(parent, numColumns - 1);
+        changeButton = getChangeControl(parent);
+        GridData gd = new GridData();
+        gd.horizontalAlignment = GridData.FILL;
+        int widthHint = convertHorizontalDLUsToPixels(changeButton,
+                IDialogConstants.BUTTON_WIDTH);
+        gd.widthHint = Math.max(widthHint, changeButton.computeSize(
+                SWT.DEFAULT, SWT.DEFAULT, true).x);
+        changeButton.setLayoutData(gd);
+    }
+
+    /**
+     * Get the change control. Create it in parent if required.
+     * @param parent
+     * @return Button
+     */
+    protected Button getChangeControl(Composite parent) {
+        if (changeButton is null) {
+            changeButton = new Button(parent, SWT.PUSH);
+            if (changeButtonText is null) {
+                changeButtonText = JFaceResources.getString("openChange"); //$NON-NLS-1$
+            }
+            changeButton.setText(changeButtonText);
+            changeButton.setFont(parent.getFont());
+            changeButton.addSelectionListener(new class SelectionAdapter {
+                public void widgetSelected(SelectionEvent evt) {
+                    String newValue = changePressed();
+                    if (newValue !is null) {
+                        setStringValue(newValue);
+                    }
+                }
+            });
+            changeButton.addDisposeListener(new class DisposeListener {
+                public void widgetDisposed(DisposeEvent event) {
+                    changeButton = null;
+                }
+            });
+        } else {
+            checkParent(changeButton, parent);
+        }
+        return changeButton;
+    }
+
+    /* (non-Javadoc)
+     * Method declared on FieldEditor.
+     */
+    public override int getNumberOfControls() {
+        return 3;
+    }
+
+    /**
+     * Returns this field editor's shell.
+     *
+     * @return the shell
+     */
+    protected Shell getShell() {
+        if (changeButton is null) {
+            return null;
+        }
+        return changeButton.getShell();
+    }
+
+    /**
+     * Sets the text of the change button.
+     *
+     * @param text the new text
+     */
+    public void setChangeButtonText(String text) {
+        Assert.isNotNull(text);
+        changeButtonText = text;
+        if (changeButton !is null) {
+            changeButton.setText(text);
+            Point prefSize = changeButton.computeSize(SWT.DEFAULT, SWT.DEFAULT);
+            GridData data = cast(GridData)changeButton.getLayoutData();
+            data.widthHint = Math.max(SWT.DEFAULT, prefSize.x);
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see org.eclipse.jface.preference.FieldEditor#setEnabled(bool, org.eclipse.swt.widgets.Composite)
+     */
+    public override void setEnabled(bool enabled, Composite parent) {
+        super.setEnabled(enabled, parent);
+        if (changeButton !is null) {
+            changeButton.setEnabled(enabled);
+        }
+    }
+
+}