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

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