1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates.
   3  * All rights reserved. Use is subject to license terms.
   4  *
   5  * This file is available and licensed under the following license:
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  *  - Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *  - Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the distribution.
  16  *  - Neither the name of Oracle Corporation nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 package com.oracle.javafx.scenebuilder.kit.util.control.paintpicker;
  33 
  34 import java.util.Locale;
  35 import javafx.scene.control.TextField;
  36 import javafx.scene.input.Clipboard;
  37 
  38 /**
  39  * Define a text field that accept only doubles.
  40  */
  41 public class DoubleTextField extends TextField {
  42 
  43     public DoubleTextField() {
  44     }
  45 
  46     @Override
  47     public void replaceText(int start, int end, String text) {
  48         String newText = getNewText(start, end, text);
  49         if (!text.isEmpty() // Always allow text deletion
  50                 && (!newText.equals("-") && !newText.equals(".") && !newText.equals("-."))) { //NOI18N
  51             try {
  52                 if (newText.toLowerCase(Locale.ROOT).contains("d") || newText.toLowerCase(Locale.ROOT).contains("f")) { //NOI18N
  53                     // 'd' and 'f' are valid for a Double,
  54                     // but we don't want to accept them in the editor
  55                     return;
  56                 }
  57                 // Replace ',' by '.'
  58                 newText = newText.replace(',', '.'); //NOI18N
  59                 Double.parseDouble(newText);
  60             } catch (NumberFormatException e) {
  61                 return;
  62             }
  63         }
  64         // Replace ',' by '.'
  65         text = text.replace(',', '.'); //NOI18N
  66         super.replaceText(start, end, text);
  67     }
  68 
  69     @Override
  70     public void paste() {
  71         String strToPaste = Clipboard.getSystemClipboard().getString();
  72         try {
  73             Double.parseDouble(strToPaste);
  74         } catch (NumberFormatException e) {
  75             return;
  76         }
  77         super.paste();
  78     }
  79 
  80     private String getNewText(int start, int end, String text) {
  81         String oldText = getText();
  82         String toReplace = oldText.substring(start, end);
  83         String newText;
  84         if (toReplace.isEmpty()) {
  85             // start/end is outside oldText ==> add
  86             newText = oldText + text;
  87         } else {
  88             String headerStr = oldText.substring(0, start);
  89             String trailerStr = ""; //NOI18N
  90             if (end < oldText.length()) {
  91                 trailerStr = oldText.substring(end, oldText.length());
  92             }
  93             newText = headerStr + text + trailerStr;
  94         }
  95         return newText;
  96      }
  97 
  98 }