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

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