bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/contentassist/ContentAssistTextField.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.browsing.ui.swt.contentassist;
  13
  14 import java.util.Arrays;
  15 import java.util.Collection;
  16 import java.util.Map;
  17 import java.util.TreeMap;
  18
  19 import org.eclipse.jface.fieldassist.IContentProposal;
  20 import org.eclipse.jface.fieldassist.IContentProposalListener;
  21 import org.eclipse.jface.fieldassist.TextContentAdapter;
  22 import org.eclipse.jface.layout.GridDataFactory;
  23 import org.eclipse.jface.layout.GridLayoutFactory;
  24 import org.eclipse.swt.SWT;
  25 import org.eclipse.swt.events.FocusEvent;
  26 import org.eclipse.swt.events.FocusListener;
  27 import org.eclipse.swt.events.KeyAdapter;
  28 import org.eclipse.swt.events.KeyEvent;
  29 import org.eclipse.swt.events.ModifyEvent;
  30 import org.eclipse.swt.events.ModifyListener;
  31 import org.eclipse.swt.events.TraverseEvent;
  32 import org.eclipse.swt.events.TraverseListener;
  33 import org.eclipse.swt.widgets.Composite;
  34 import org.eclipse.swt.widgets.Text;
  35
  36
  37 /**
  38  * @author Tuukka Lehtonen
  39  *
  40  * @param <T>
  41  */
  42 public class ContentAssistTextField extends Composite {
  43
  44     private static final boolean DEBUG = false;
  45
  46     Text text;
  47     INamedObject acceptedProposal;
  48     INamedObject result;
  49     OpenableContentAssistCommandAdapter contentAssist;
  50
  51     public <T extends INamedObject> ContentAssistTextField(final Composite parent, T initialValue, final T[] allowedValues, int style) {
  52         this(parent, initialValue, Arrays.asList(allowedValues), style);
  53     }
  54
  55     public <T extends INamedObject> ContentAssistTextField(final Composite parent, T initialValue, final Collection<T> allowedValues, int style) {
  56         super(parent, style);
  57         this.result = initialValue;
  58
  59         GridLayoutFactory.fillDefaults().applyTo(this);
  60
  61         text = new Text(this, style);
  62         text.setText(initialValue == null ? "" : initialValue.getName());
  63         GridDataFactory.fillDefaults().grab(true, true).applyTo(text);
  64
  65         final Map<String, INamedObject> valueMap = new TreeMap<String, INamedObject>(String.CASE_INSENSITIVE_ORDER);
  66         for (T t : allowedValues) {
  67             valueMap.put(t.getName(), t);
  68         }
  69
  70         contentAssist = new OpenableContentAssistCommandAdapter(text,
  71                 new TextContentAdapter(),
  72                 new NamedObjectContentProposalProvider<T>(allowedValues),
  73                 (String) null,
  74                 (char[]) null,
  75                 true
  76         );
  77         contentAssist.addContentProposalListener(new IContentProposalListener() {
  78             @Override
  79             public void proposalAccepted(IContentProposal proposal) {
  80                 if (DEBUG)
  81                     System.out.println("accepted: " + proposal);
  82                 acceptedProposal = ((INamedObjectContentProposal) proposal).getNamedObject();
  83                 ContentAssistTextField.this.result = acceptedProposal;
  84                 text.setText(acceptedProposal.getName());
  85                 text.setSelection(acceptedProposal.getName().length());
  86                 //text.selectAll();
  87             }
  88         });
  89
  90         text.addModifyListener(new ModifyListener() {
  91             @Override
  92             public void modifyText(ModifyEvent e) {
  93                 String t = text.getText();
  94                 if (DEBUG) {
  95                     System.out.println("text: " + t);
  96                     System.out.println("value set: " + valueMap);
  97                 }
  98                 INamedObject obj = valueMap.get(t);
  99                 if (obj == null) {
 100                     result = null;
 101                     if (DEBUG)
 102                         System.out.println("no result");
 103                     contentAssist.open();
 104                 } else {
 105                     result = obj;
 106                     if (DEBUG)
 107                         System.out.println("result: " + result);
 108                 }
 109             }
 110         });
 111         text.addKeyListener(new KeyAdapter() {
 112
 113             @Override
 114             public void keyPressed(KeyEvent e) {
 115                 if(e.keyCode == SWT.CR) {
 116                     String name = text.getText();
 117                     if (DEBUG)
 118                         System.out.println("CR: " + name);
 119                     if(name.isEmpty()) {
 120                         return;
 121                     }
 122                     if(acceptedProposal == null)
 123                         acceptedProposal = FindExactMatch.exec(name, allowedValues);
 124                     if(acceptedProposal == null)
 125                         contentAssist.open();
 126                     else {
 127                         ContentAssistTextField.this.result = acceptedProposal;
 128                         //text.setText(acceptedProposal.getName());
 129                         //text.traverse(SWT.TRAVERSE_TAB_NEXT);
 130                         //text.traverse(SWT.TRAVERSE_RETURN);
 131                     }
 132                 }
 133             }
 134
 135         });
 136         text.addFocusListener(new FocusListener() {
 137
 138             TraverseListener listener = new TraverseListener() {
 139                 @Override
 140                 public void keyTraversed(TraverseEvent e) {
 141 //                    System.out.println("CA TraverseListener PARENT TRAVERSE: " + e.detail);
 142                     if (e.detail == SWT.TRAVERSE_RETURN) {
 143                         e.doit = false;
 144                     }
 145                 }
 146             };
 147
 148             @Override
 149             public void focusLost(FocusEvent e) {
 150                 parent.removeTraverseListener(listener);
 151             }
 152
 153             @Override
 154             public void focusGained(FocusEvent e) {
 155                 parent.addTraverseListener(listener);
 156             }
 157         });
 158
 159         contentAssist.setPropagateKeys(true);
 160     }
 161
 162     public INamedObject getResult() {
 163         return result;
 164     }
 165
 166     public Text getControl() {
 167         return text;
 168     }
 169
 170     public void openAssist() {
 171         contentAssist.open();
 172     }
 173
 174 }