uimaj-2.2.1-incubating/uimaj-ep-configurator/src/main/java/org/apache/uima/taeconfigurator/editors/ui/dialogs/AbstractDialog.java - uima-uimaj - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */

 package org.apache.uima.taeconfigurator.editors.ui.dialogs;

 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.Set;

 import org.apache.uima.taeconfigurator.StandardStrings;
 import org.apache.uima.taeconfigurator.editors.MultiPageEditor;
 import org.apache.uima.taeconfigurator.editors.MultiPageEditorContributor;
 import org.apache.uima.taeconfigurator.editors.ui.AbstractSection;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.CCombo;
 import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.events.KeyListener;
 import org.eclipse.swt.graphics.FontData;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableItem;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.swt.widgets.Tree;

 public abstract class AbstractDialog extends Dialog implements Listener, StandardStrings {

   private final static boolean contentAssistAvailable;
   static {
     boolean contentAssistIsOK = false;
     try {
       Class.forName("org.eclipse.ui.fieldassist.ContentAssistField");
       contentAssistIsOK = true;
     } catch (ClassNotFoundException e) {
     }
     contentAssistAvailable = contentAssistIsOK;
   }

   protected MultiPageEditor editor;

   protected AbstractSection section;

   protected Button okButton;

   protected Label errorMessageUI;

   protected String title;

   protected String dialogDescription;

   /**
    * @param parentShell
    */
   protected AbstractDialog(AbstractSection section, String title, String description) {
     // maintainers: don't use new shell; see comment in Dialog class
     super(section.getSection().getShell());
     commonInit(section, title, description);
   }

   protected AbstractDialog(Shell shell, String title, String description) {
     super(shell);
     commonInit(null, title, description);
   }

   private void commonInit(AbstractSection aSection, String aTitle, String aDescription) {
     section = aSection;
     editor = (null == section)? null : section.editor;
     setShellStyle(getShellStyle() | SWT.RESIZE);
     title = aTitle;
     dialogDescription = aDescription;
   }

   public void setTitle(String title) {
     this.title = title;
   }

   public void setMessage(String msg) {
     this.dialogDescription = msg;
   }
   protected Control createDialogArea(Composite parent) {
     // create composite
     Composite composite = (Composite) super.createDialogArea(parent);
     createWideLabel(composite, dialogDescription);
     return composite;
   }

   protected Control createDialogArea(Composite parent, Object existing) {
     Composite composite = (Composite) super.createDialogArea(parent);
     createWideLabel(composite, dialogDescription);
     if (null != existing)
       getShell().setText(getShell().getText().replaceFirst("Add", "Edit"));
     return composite;
   }

   protected void configureShell(Shell shell) {
     super.configureShell(shell);
     shell.setText(title);
   }

   protected Label createWideLabel(Composite parent, String message) {
     Label label = null;

     label = new Label(parent, SWT.WRAP);
     label.setText(null != message ? message : "");
     GridData data = new GridData(GridData.FILL_HORIZONTAL);
     data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
     label.setLayoutData(data);
     return label;
   }

   protected void createButtonsForButtonBar(Composite parent) {
     super.createButtonsForButtonBar(parent);
     okButton = getButton(IDialogConstants.OK_ID);
     okButton.setEnabled(false);
   }

   public static final String[] stringArray0 = new String[0];

   protected void setTextAndTip(Button c, String label, String tip) {
     c.setText(label);
     c.setToolTipText(tip);
   }

   protected void setTextAndTip(CCombo c, String label, String tip) {
     c.setText(label);
     c.setToolTipText(tip);
   }

   protected void setTextAndTip(Label c, String label, String tip) {
     c.setText(label);
     c.setToolTipText(tip);
   }

   protected Composite new2ColumnComposite(Composite parent) {
     Composite twoCol = new Composite(parent, SWT.NONE);
     twoCol.setLayout(new GridLayout(2, false)); // false = not equal width
     ((GridLayout) twoCol.getLayout()).marginHeight = 0;
     ((GridLayout) twoCol.getLayout()).marginWidth = 0;
     twoCol.setLayoutData(new GridData(GridData.FILL_BOTH));
     return twoCol;
   }

   protected Text newDescription(Composite twoCol, String tip) {
     setTextAndTip(new Label(twoCol, SWT.NONE), S_DESCRIPTION, tip);
     Text t = new Text(twoCol, SWT.BORDER | SWT.MULTI | SWT.WRAP | SWT.V_SCROLL);
     t.setLayoutData(new GridData(GridData.FILL_BOTH));
     ((GridData) t.getLayoutData()).heightHint = 100;
     t.setToolTipText(tip);
     return t;
   }

   protected CCombo newLabeledCCombo(Composite parent, String label, String tip) {
     setTextAndTip(new Label(parent, SWT.NONE), label, tip);
     return newCCombo(parent, tip);
   }

   protected CCombo newCCombo(Composite parent, String tip) {
     final CCombo cc = new CCombo(parent, SWT.FLAT | SWT.BORDER | SWT.READ_ONLY);
     cc.setBackground(getShell().getDisplay().getSystemColor(SWT.COLOR_WHITE));
     cc.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
     // without these next lines, the height of the ccombo is too small
     // especially on a Mac
     FontData [] fontData = cc.getFont().getFontData();
     ((GridData) cc.getLayoutData()).heightHint = 2 * fontData[0].getHeight();
     cc.addListener(SWT.Selection, this);
     cc.setToolTipText(tip);
     cc.addKeyListener(new KeyListener() {
       private final StringBuffer b = new StringBuffer();

       public void keyPressed(KeyEvent e) {
       }

       public void keyReleased(KeyEvent e) {
         if (e.keyCode == SWT.BS) {
           if (b.length() > 0)
             b.deleteCharAt(b.length() - 1);
         } else if (Character.isJavaIdentifierPart(e.character) || e.character == '.')
           b.append(e.character);
         else
           return;
         final String[] ccItems = cc.getItems();
         final String partial = b.toString();
         int iBefore = -1;
         for (int i = 0; i < ccItems.length; i++) {
           if (ccItems[i].startsWith(partial)) {
             iBefore = i;
             break;
           }
         }
         if (iBefore >= 0)
           cc.setText(cc.getItem(iBefore));
       }
     });
     return cc;
   }

   protected Button newButton(Composite parent, int style, String name, String tip) {
     Button b = new Button(parent, style);
     setTextAndTip(b, name, tip);
     b.addListener(SWT.Selection, this);
     return b;
   }

   protected Text newText(Composite parent, int style, String tip) {
     Text t = new Text(parent, style | SWT.BORDER);
     t.setToolTipText(tip);
     t.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
     t.addListener(SWT.KeyUp, this);
     t.addListener(SWT.MouseUp, this); // for paste operation
     return t;
   }

   protected Text newLabeledText(Composite parent, int style, String label, String tip) {
     setTextAndTip(new Label(parent, SWT.NONE), label, tip);
     return newText(parent, style, tip);
   }

   protected Tree newTree(Composite parent, int style) {
     Tree tree = new Tree(parent, style | SWT.BORDER);
     GridData gd = new GridData(GridData.FILL_BOTH);
     tree.setLayoutData(gd);
     return tree;
   }

   /**
    * Styles = SWT.SINGLE / MULTI / CHECK / FULL_SELECTION / HIDE_SELECTION
    *
    * @param parent
    * @param style
    * @return the new table widget
    */
   protected Table newTable(Composite parent, int style) {
     Table table = new Table(parent, style | SWT.BORDER);
     GridData gd = new GridData(GridData.FILL_BOTH);
     table.setLayoutData(gd);
     table.addListener(SWT.Selection, this);
     table.addListener(SWT.KeyUp, this); // delete key
     return table;
   }

   public int getHitColumn(TableItem item, Point p) {
     for (int i = item.getParent().getColumnCount() - 1; i >= 0; i--) {
       Rectangle columnBounds = item.getBounds(i);
       if (columnBounds.contains(p))
         return i;
     }
     return -1;
   }

   public Composite newButtonContainer(Composite parent) {
     Composite buttonContainer = new Composite(parent, SWT.NONE);
     buttonContainer.setLayout(new GridLayout());
     buttonContainer.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING
             | GridData.HORIZONTAL_ALIGN_FILL));
     return buttonContainer;
   }

   public Button newPushButton(Composite parent, String label, String tip) {
     Button button = new Button(parent, SWT.PUSH);
     button.setText(label);
     button.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING
             | GridData.HORIZONTAL_ALIGN_FILL));
     // button.pack();
     button.setToolTipText(tip);
     button.addListener(SWT.Selection, this);
     return button;
   }

   protected void newErrorMessage(Composite c) {
     newErrorMessage(c, 1);
   }

   protected void newErrorMessage(Composite twoCol, int span) {
     Label m = new Label(twoCol, SWT.WRAP);
     m.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
     ((GridData) m.getLayoutData()).horizontalSpan = span;
     ((GridData) m.getLayoutData()).widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
     errorMessageUI = m;
   }

   protected void setErrorMessage(String msg) {
     errorMessageUI.setText(msg);
     Composite shell = errorMessageUI.getParent();
     while (!(shell instanceof Shell))
       shell = shell.getParent();
     shell.setSize(shell.computeSize(-1, -1));
   }

   // subclasses override, and often use super.handleEvent to call this
   public void handleEvent(Event event) {
     if (okButton != null)  // may be null if handler called from
                            // main area setText event, during construction
                            // because button bar is constructed after main area
       enableOK();
   }

   protected void superButtonPressed(int buttonId) {
     super.buttonPressed(buttonId);
   }

   // overridden where needed
   protected void buttonPressed(int buttonId) {
     if (buttonId == IDialogConstants.OK_ID) {
       copyValuesFromGUI();
       if (!isValid())
         return; // keeps dialog open
     }
     super.buttonPressed(buttonId);
   }

   public abstract void copyValuesFromGUI();

   public abstract boolean isValid();

   protected Control createButtonBar(Composite c) {
     Control returnValue = super.createButtonBar(c);
     enableOK();
     return returnValue;
   }

   public abstract void enableOK();

   public boolean useQualifiedTypes() {
     return MultiPageEditorContributor.getUseQualifiedTypes();
   }

   protected String[] getAllTypesAsSortedArray() {
     String[] allTypes = (String[]) section.editor.allTypes.get().keySet().toArray(stringArray0);
     Arrays.sort(allTypes, new Comparator() {
       public int compare(Object o1, Object o2) {
         String shortName1 = AbstractSection.getShortName((String) o1);
         String shortName2 = AbstractSection.getShortName((String) o2);
         if (!shortName1.equals(shortName2))
           return shortName1.compareTo(shortName2);

         String namespace1 = AbstractSection.getNameSpace((String) o1);
         String namespace2 = AbstractSection.getNameSpace((String) o2);
         return namespace1.compareTo(namespace2);
       }
     });
     return allTypes;
   }

   protected Text newLabeledTypeInput(AbstractSection aSection, Composite parent, String label, String tip) {
     setTextAndTip(new Label(parent, SWT.NONE), label, tip);
     return newTypeInput(aSection, parent);
   }

   /**
    * @param twoCol
    */
   protected Text newTypeInput(AbstractSection aSection, Composite twoCol) {
     Composite tc = new2ColumnComposite(twoCol);
     final TypesWithNameSpaces candidatesToPickFrom = getTypeSystemInfoList(); // provide an ArrayList of

     final Text text;
     if (contentAssistAvailable) {
       ContentAssistField32 caf = new ContentAssistField32(tc, candidatesToPickFrom);
       text = caf.getControl();
     } else {
       text = newText(tc, SWT.BORDER, "");
     }

     text.setToolTipText("Enter a Type name." + (contentAssistAvailable ?
             "Content Assist is available (press Ctrl + Space)" : ""));
     text.getParent().setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
     text.addListener(SWT.KeyUp, this);
     text.addListener(SWT.MouseUp, this); // for paste operation
     text.addListener(SWT.Modify, this);  // for content assist

 //    newText(tc, SWT.NONE,
 //    "Enter a Type name. Content Assist is available on Eclipse 3.2 and beyond (press Ctrl + Space)");

 //    ContentProposalAdapter adapter = new ContentProposalAdapter(
 //            text, new TextContentAdapter(),
 //            candidatesToPickFrom,
 //            contentAssistActivationKey,
 //            contentAssistActivationChars);
 //    adapter.setProposalAcceptanceStyle(ContentProposalAdapter.PROPOSAL_REPLACE);

     Button browseButton = newPushButton(tc, "Browse", "Click here to browse possible types");
     browseButton.removeListener(SWT.Selection, this);
     final AbstractSection finalSection = aSection;
     browseButton.addListener(SWT.Selection, new Listener() {
       public void handleEvent(Event event) {
         errorMessageUI.setText("");
         SelectTypeDialog dialog = new SelectTypeDialog(finalSection, candidatesToPickFrom);
 //          OpenTypeSystemSelectionDialog dialog =
 //              new OpenTypeSystemSelectionDialog(getShell(), typeList);
         if (dialog.open() != IDialogConstants.OK_ID)
           return;

         text.setText((null == dialog.nameSpaceName ||
                 "".equals(dialog.nameSpaceName)) ?
                 dialog.typeName :
                 dialog.nameSpaceName + "." + dialog.typeName);
         if (okButton != null)
           enableOK();
     /*
         Object[] types = dialog.getResult();
         if (types != null && types.length > 0) {
           ITypeSystemInfo selectedType = (ITypeSystemInfo) types[0];
           text.setText(selectedType.getFullName());
           enableOK();
         }
     */
       }
     });
     /*
     TypeSystemCompletionProcessor processor = new TypeSystemCompletionProcessor(
             candidatesToPickFrom);
     ControlContentAssistHelper.createTextContentAssistant(text, processor);
     text.addListener(SWT.KeyDown, new Listener() {
       public void handleEvent(Event e) {
         errorMessageUI.setText("");
       }
     });
     text.addListener(SWT.Modify, new Listener() {
       public void handleEvent(Event e) {
         textModifyCallback(e);
       }
     });
     */
     return text;
   }

   public void textModifyCallback(Event e) {
   }

   // default implementation - always overridden when used
   public TypesWithNameSpaces getTypeSystemInfoList() {
     return new TypesWithNameSpaces();
   }

   protected boolean typeContainedInTypeSystemInfoList(String fullTypeName, TypesWithNameSpaces types) {
     String key = AbstractSection.getShortName(fullTypeName);
     String nameSpace = AbstractSection.getNameSpace(fullTypeName);

     Set s = (Set)types.sortedNames.get(key);

     if (null == s)
       return false;

     return s.contains(nameSpace);
   }

   /**
    * In XML, a 0 - length string is represented as <xxx/>, while a null value causes the element to
    * be omitted. Fix up values to be null if empty.
    *
    * @param v
    * @return null for 0 length string
    */
   public static String nullIf0lengthString(String v) {
     if ("".equals(v))
       return null;
     return v;
   }

   public static String convertNull(String v) {
     if (null == v)
       return "";
     return v;
   }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/

	package org.apache.uima.taeconfigurator.editors.ui.dialogs;

	import java.util.Arrays;
	import java.util.Comparator;
	import java.util.Set;

	import org.apache.uima.taeconfigurator.StandardStrings;
	import org.apache.uima.taeconfigurator.editors.MultiPageEditor;
	import org.apache.uima.taeconfigurator.editors.MultiPageEditorContributor;
	import org.apache.uima.taeconfigurator.editors.ui.AbstractSection;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.CCombo;
	import org.eclipse.swt.events.KeyEvent;
	import org.eclipse.swt.events.KeyListener;
	import org.eclipse.swt.graphics.FontData;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableItem;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.swt.widgets.Tree;

	public abstract class AbstractDialog extends Dialog implements Listener, StandardStrings {

	private final static boolean contentAssistAvailable;
	static {
	boolean contentAssistIsOK = false;
	try {
	Class.forName("org.eclipse.ui.fieldassist.ContentAssistField");
	contentAssistIsOK = true;
	} catch (ClassNotFoundException e) {
	}
	contentAssistAvailable = contentAssistIsOK;
	}

	protected MultiPageEditor editor;

	protected AbstractSection section;

	protected Button okButton;

	protected Label errorMessageUI;

	protected String title;

	protected String dialogDescription;

	/**
	* @param parentShell
	*/
	protected AbstractDialog(AbstractSection section, String title, String description) {
	// maintainers: don't use new shell; see comment in Dialog class
	super(section.getSection().getShell());
	commonInit(section, title, description);
	}

	protected AbstractDialog(Shell shell, String title, String description) {
	super(shell);
	commonInit(null, title, description);
	}

	private void commonInit(AbstractSection aSection, String aTitle, String aDescription) {
	section = aSection;
	editor = (null == section)? null : section.editor;
	setShellStyle(getShellStyle() \| SWT.RESIZE);
	title = aTitle;
	dialogDescription = aDescription;
	}

	public void setTitle(String title) {
	this.title = title;
	}

	public void setMessage(String msg) {
	this.dialogDescription = msg;
	}
	protected Control createDialogArea(Composite parent) {
	// create composite
	Composite composite = (Composite) super.createDialogArea(parent);
	createWideLabel(composite, dialogDescription);
	return composite;
	}

	protected Control createDialogArea(Composite parent, Object existing) {
	Composite composite = (Composite) super.createDialogArea(parent);
	createWideLabel(composite, dialogDescription);
	if (null != existing)
	getShell().setText(getShell().getText().replaceFirst("Add", "Edit"));
	return composite;
	}

	protected void configureShell(Shell shell) {
	super.configureShell(shell);
	shell.setText(title);
	}

	protected Label createWideLabel(Composite parent, String message) {
	Label label = null;

	label = new Label(parent, SWT.WRAP);
	label.setText(null != message ? message : "");
	GridData data = new GridData(GridData.FILL_HORIZONTAL);
	data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
	label.setLayoutData(data);
	return label;
	}

	protected void createButtonsForButtonBar(Composite parent) {
	super.createButtonsForButtonBar(parent);
	okButton = getButton(IDialogConstants.OK_ID);
	okButton.setEnabled(false);
	}

	public static final String[] stringArray0 = new String[0];

	protected void setTextAndTip(Button c, String label, String tip) {
	c.setText(label);
	c.setToolTipText(tip);
	}

	protected void setTextAndTip(CCombo c, String label, String tip) {
	c.setText(label);
	c.setToolTipText(tip);
	}

	protected void setTextAndTip(Label c, String label, String tip) {
	c.setText(label);
	c.setToolTipText(tip);
	}

	protected Composite new2ColumnComposite(Composite parent) {
	Composite twoCol = new Composite(parent, SWT.NONE);
	twoCol.setLayout(new GridLayout(2, false)); // false = not equal width
	((GridLayout) twoCol.getLayout()).marginHeight = 0;
	((GridLayout) twoCol.getLayout()).marginWidth = 0;
	twoCol.setLayoutData(new GridData(GridData.FILL_BOTH));
	return twoCol;
	}

	protected Text newDescription(Composite twoCol, String tip) {
	setTextAndTip(new Label(twoCol, SWT.NONE), S_DESCRIPTION, tip);
	Text t = new Text(twoCol, SWT.BORDER \| SWT.MULTI \| SWT.WRAP \| SWT.V_SCROLL);
	t.setLayoutData(new GridData(GridData.FILL_BOTH));
	((GridData) t.getLayoutData()).heightHint = 100;
	t.setToolTipText(tip);
	return t;
	}

	protected CCombo newLabeledCCombo(Composite parent, String label, String tip) {
	setTextAndTip(new Label(parent, SWT.NONE), label, tip);
	return newCCombo(parent, tip);
	}

	protected CCombo newCCombo(Composite parent, String tip) {
	final CCombo cc = new CCombo(parent, SWT.FLAT \| SWT.BORDER \| SWT.READ_ONLY);
	cc.setBackground(getShell().getDisplay().getSystemColor(SWT.COLOR_WHITE));
	cc.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	// without these next lines, the height of the ccombo is too small
	// especially on a Mac
	FontData [] fontData = cc.getFont().getFontData();
	((GridData) cc.getLayoutData()).heightHint = 2 * fontData[0].getHeight();
	cc.addListener(SWT.Selection, this);
	cc.setToolTipText(tip);
	cc.addKeyListener(new KeyListener() {
	private final StringBuffer b = new StringBuffer();

	public void keyPressed(KeyEvent e) {
	}

	public void keyReleased(KeyEvent e) {
	if (e.keyCode == SWT.BS) {
	if (b.length() > 0)
	b.deleteCharAt(b.length() - 1);
	} else if (Character.isJavaIdentifierPart(e.character) \|\| e.character == '.')
	b.append(e.character);
	else
	return;
	final String[] ccItems = cc.getItems();
	final String partial = b.toString();
	int iBefore = -1;
	for (int i = 0; i < ccItems.length; i++) {
	if (ccItems[i].startsWith(partial)) {
	iBefore = i;
	break;
	}
	}
	if (iBefore >= 0)
	cc.setText(cc.getItem(iBefore));
	}
	});
	return cc;
	}

	protected Button newButton(Composite parent, int style, String name, String tip) {
	Button b = new Button(parent, style);
	setTextAndTip(b, name, tip);
	b.addListener(SWT.Selection, this);
	return b;
	}

	protected Text newText(Composite parent, int style, String tip) {
	Text t = new Text(parent, style \| SWT.BORDER);
	t.setToolTipText(tip);
	t.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	t.addListener(SWT.KeyUp, this);
	t.addListener(SWT.MouseUp, this); // for paste operation
	return t;
	}

	protected Text newLabeledText(Composite parent, int style, String label, String tip) {
	setTextAndTip(new Label(parent, SWT.NONE), label, tip);
	return newText(parent, style, tip);
	}

	protected Tree newTree(Composite parent, int style) {
	Tree tree = new Tree(parent, style \| SWT.BORDER);
	GridData gd = new GridData(GridData.FILL_BOTH);
	tree.setLayoutData(gd);
	return tree;
	}

	/**
	* Styles = SWT.SINGLE / MULTI / CHECK / FULL_SELECTION / HIDE_SELECTION
	*
	* @param parent
	* @param style
	* @return the new table widget
	*/
	protected Table newTable(Composite parent, int style) {
	Table table = new Table(parent, style \| SWT.BORDER);
	GridData gd = new GridData(GridData.FILL_BOTH);
	table.setLayoutData(gd);
	table.addListener(SWT.Selection, this);
	table.addListener(SWT.KeyUp, this); // delete key
	return table;
	}

	public int getHitColumn(TableItem item, Point p) {
	for (int i = item.getParent().getColumnCount() - 1; i >= 0; i--) {
	Rectangle columnBounds = item.getBounds(i);
	if (columnBounds.contains(p))
	return i;
	}
	return -1;
	}

	public Composite newButtonContainer(Composite parent) {
	Composite buttonContainer = new Composite(parent, SWT.NONE);
	buttonContainer.setLayout(new GridLayout());
	buttonContainer.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING
	\| GridData.HORIZONTAL_ALIGN_FILL));
	return buttonContainer;
	}

	public Button newPushButton(Composite parent, String label, String tip) {
	Button button = new Button(parent, SWT.PUSH);
	button.setText(label);
	button.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING
	\| GridData.HORIZONTAL_ALIGN_FILL));
	// button.pack();
	button.setToolTipText(tip);
	button.addListener(SWT.Selection, this);
	return button;
	}

	protected void newErrorMessage(Composite c) {
	newErrorMessage(c, 1);
	}

	protected void newErrorMessage(Composite twoCol, int span) {
	Label m = new Label(twoCol, SWT.WRAP);
	m.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	((GridData) m.getLayoutData()).horizontalSpan = span;
	((GridData) m.getLayoutData()).widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
	errorMessageUI = m;
	}

	protected void setErrorMessage(String msg) {
	errorMessageUI.setText(msg);
	Composite shell = errorMessageUI.getParent();
	while (!(shell instanceof Shell))
	shell = shell.getParent();
	shell.setSize(shell.computeSize(-1, -1));
	}

	// subclasses override, and often use super.handleEvent to call this
	public void handleEvent(Event event) {
	if (okButton != null) // may be null if handler called from
	// main area setText event, during construction
	// because button bar is constructed after main area
	enableOK();
	}

	protected void superButtonPressed(int buttonId) {
	super.buttonPressed(buttonId);
	}

	// overridden where needed
	protected void buttonPressed(int buttonId) {
	if (buttonId == IDialogConstants.OK_ID) {
	copyValuesFromGUI();
	if (!isValid())
	return; // keeps dialog open
	}
	super.buttonPressed(buttonId);
	}

	public abstract void copyValuesFromGUI();

	public abstract boolean isValid();

	protected Control createButtonBar(Composite c) {
	Control returnValue = super.createButtonBar(c);
	enableOK();
	return returnValue;
	}

	public abstract void enableOK();

	public boolean useQualifiedTypes() {
	return MultiPageEditorContributor.getUseQualifiedTypes();
	}

	protected String[] getAllTypesAsSortedArray() {
	String[] allTypes = (String[]) section.editor.allTypes.get().keySet().toArray(stringArray0);
	Arrays.sort(allTypes, new Comparator() {
	public int compare(Object o1, Object o2) {
	String shortName1 = AbstractSection.getShortName((String) o1);
	String shortName2 = AbstractSection.getShortName((String) o2);
	if (!shortName1.equals(shortName2))
	return shortName1.compareTo(shortName2);

	String namespace1 = AbstractSection.getNameSpace((String) o1);
	String namespace2 = AbstractSection.getNameSpace((String) o2);
	return namespace1.compareTo(namespace2);
	}
	});
	return allTypes;
	}

	protected Text newLabeledTypeInput(AbstractSection aSection, Composite parent, String label, String tip) {
	setTextAndTip(new Label(parent, SWT.NONE), label, tip);
	return newTypeInput(aSection, parent);
	}

	/**
	* @param twoCol
	*/
	protected Text newTypeInput(AbstractSection aSection, Composite twoCol) {
	Composite tc = new2ColumnComposite(twoCol);
	final TypesWithNameSpaces candidatesToPickFrom = getTypeSystemInfoList(); // provide an ArrayList of

	final Text text;
	if (contentAssistAvailable) {
	ContentAssistField32 caf = new ContentAssistField32(tc, candidatesToPickFrom);
	text = caf.getControl();
	} else {
	text = newText(tc, SWT.BORDER, "");
	}

	text.setToolTipText("Enter a Type name." + (contentAssistAvailable ?
	"Content Assist is available (press Ctrl + Space)" : ""));
	text.getParent().setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	text.addListener(SWT.KeyUp, this);
	text.addListener(SWT.MouseUp, this); // for paste operation
	text.addListener(SWT.Modify, this); // for content assist

	// newText(tc, SWT.NONE,
	// "Enter a Type name. Content Assist is available on Eclipse 3.2 and beyond (press Ctrl + Space)");

	// ContentProposalAdapter adapter = new ContentProposalAdapter(
	// text, new TextContentAdapter(),
	// candidatesToPickFrom,
	// contentAssistActivationKey,
	// contentAssistActivationChars);
	// adapter.setProposalAcceptanceStyle(ContentProposalAdapter.PROPOSAL_REPLACE);

	Button browseButton = newPushButton(tc, "Browse", "Click here to browse possible types");
	browseButton.removeListener(SWT.Selection, this);
	final AbstractSection finalSection = aSection;
	browseButton.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event event) {
	errorMessageUI.setText("");
	SelectTypeDialog dialog = new SelectTypeDialog(finalSection, candidatesToPickFrom);
	// OpenTypeSystemSelectionDialog dialog =
	// new OpenTypeSystemSelectionDialog(getShell(), typeList);
	if (dialog.open() != IDialogConstants.OK_ID)
	return;

	text.setText((null == dialog.nameSpaceName \|\|
	"".equals(dialog.nameSpaceName)) ?
	dialog.typeName :
	dialog.nameSpaceName + "." + dialog.typeName);
	if (okButton != null)
	enableOK();
	/*
	Object[] types = dialog.getResult();
	if (types != null && types.length > 0) {
	ITypeSystemInfo selectedType = (ITypeSystemInfo) types[0];
	text.setText(selectedType.getFullName());
	enableOK();
	}
	*/
	}
	});
	/*
	TypeSystemCompletionProcessor processor = new TypeSystemCompletionProcessor(
	candidatesToPickFrom);
	ControlContentAssistHelper.createTextContentAssistant(text, processor);
	text.addListener(SWT.KeyDown, new Listener() {
	public void handleEvent(Event e) {
	errorMessageUI.setText("");
	}
	});
	text.addListener(SWT.Modify, new Listener() {
	public void handleEvent(Event e) {
	textModifyCallback(e);
	}
	});
	*/
	return text;
	}

	public void textModifyCallback(Event e) {
	}

	// default implementation - always overridden when used
	public TypesWithNameSpaces getTypeSystemInfoList() {
	return new TypesWithNameSpaces();
	}

	protected boolean typeContainedInTypeSystemInfoList(String fullTypeName, TypesWithNameSpaces types) {
	String key = AbstractSection.getShortName(fullTypeName);
	String nameSpace = AbstractSection.getNameSpace(fullTypeName);

	Set s = (Set)types.sortedNames.get(key);

	if (null == s)
	return false;

	return s.contains(nameSpace);
	}

	/**
	* In XML, a 0 - length string is represented as <xxx/>, while a null value causes the element to
	* be omitted. Fix up values to be null if empty.
	*
	* @param v
	* @return null for 0 length string
	*/
	public static String nullIf0lengthString(String v) {
	if ("".equals(v))
	return null;
	return v;
	}

	public static String convertNull(String v) {
	if (null == v)
	return "";
	return v;
	}
	}