bundles/org.simantics.document.ui/src/org/simantics/document/ui/dialogs/TextInputDialog.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 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.document.ui.dialogs;\r
  13 \r
  14 import java.util.HashMap;\r
  15 import java.util.Map;\r
  16 \r
  17 import org.eclipse.jface.dialogs.Dialog;\r
  18 import org.eclipse.jface.dialogs.IDialogConstants;\r
  19 import org.eclipse.jface.dialogs.IInputValidator;\r
  20 import org.eclipse.swt.SWT;\r
  21 import org.eclipse.swt.widgets.Control;\r
  22 import org.eclipse.swt.widgets.Display;\r
  23 import org.eclipse.swt.widgets.Shell;\r
  24 import org.eclipse.swt.widgets.Text;\r
  25 \r
  26 /**\r
  27  * Base class for validated text input dialogs.\r
  28  * \r
  29  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
  30  *\r
  31  */\r
  32 public abstract class TextInputDialog extends Dialog{\r
  33 \r
  34         // cache for all used validators\r
  35         private Map<IInputValidator, String> validators = new HashMap<IInputValidator, String>();\r
  36         \r
  37         protected TextInputDialog(Shell parentShell) {\r
  38                 super(parentShell);\r
  39         }\r
  40         \r
  41         protected boolean validate(Text text, IInputValidator validator) {\r
  42                 String err = null;\r
  43                 if (validator != null)\r
  44                         err = validator.isValid(text.getText());\r
  45                 // add validator to the cache\r
  46                 validators.put(validator, err);\r
  47                 Control button = getButton(IDialogConstants.OK_ID);\r
  48                 \r
  49                 // disable ok button if any of the validators are reporting errors. \r
  50                 if (button != null) {\r
  51                         boolean valid = true;\r
  52                         for (String s : validators.values())\r
  53                                 if (s != null)\r
  54                                         valid = false;\r
  55                         button.setEnabled(valid);\r
  56                 }\r
  57                 if (err != null) {\r
  58                         text.setForeground(Display.getCurrent().getSystemColor(SWT.COLOR_RED));\r
  59                         text.setToolTipText(err);\r
  60                         \r
  61                         return false;\r
  62                 } else {\r
  63                         text.setForeground(Display.getCurrent().getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));\r
  64                         text.setToolTipText(null);\r
  65                         return true;\r
  66                 }\r
  67                 \r
  68         }\r
  69         \r
  70         protected String updateName(String url, String name) {\r
  71                 \r
  72                 if (url.length() > 0 ) {\r
  73                         if (name == null) {\r
  74                                 return new String(url);\r
  75                         } else if (Math.abs(url.length() - name.length()) <=  1) {\r
  76                                 int common = Math.min(name.length(), url.length());\r
  77                                 if (name.regionMatches(0, url, 0, common)) {\r
  78                                         return new String(url);\r
  79                                 }\r
  80                         }\r
  81                 }\r
  82                 return null;\r
  83                 \r
  84         }\r
  85 \r
  86 }\r