1 files changed, 74 insertions, 0 deletions
diff --git a/BKUCommonGUI/src/main/java/at/gv/egiz/bku/gui/PinDocument.java b/BKUCommonGUI/src/main/java/at/gv/egiz/bku/gui/PinDocument.java
new file mode 100644
index 00000000..52a3d5fe
--- /dev/null
+++ b/BKUCommonGUI/src/main/java/at/gv/egiz/bku/gui/PinDocument.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2008 Federal Chancellery Austria and
+ * Graz University of Technology
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package at.gv.egiz.bku.gui;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import javax.swing.JButton;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.PlainDocument;
+
+/**
+ *
+ * @author clemens
+ */
+class PINDocument extends PlainDocument {
+
+  private static final long serialVersionUID = 1L;
+  protected Pattern pinPattern;
+  protected int minLength;
+  protected int maxLength;
+  protected JButton enterButton;
+
+  public PINDocument(int minLength, int maxLength, String pattern, JButton enterButton) {
+    if (enterButton == null) {
+      throw new NullPointerException("OK button null");
+    }
+    if (pattern != null) {
+      pinPattern = Pattern.compile(pattern);
+    } else {
+      pinPattern = Pattern.compile(".");
+    }
+    this.minLength = minLength;
+    this.maxLength = maxLength;
+    this.enterButton = enterButton;
+  }
+
+  @Override
+  public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
+    if (maxLength < 0 || maxLength >= (getLength() + str.length())) {
+      boolean matches = true;
+      for (int i = 0; i < str.length(); i++) {
+        Matcher m = pinPattern.matcher(str.substring(i, i + 1));
+        if (!m.matches()) {
+          matches = false;
+        }
+      }
+      if (matches) {
+        super.insertString(offs, str, a);
+        enterButton.setEnabled(getLength() >= minLength);
+      }
+    }
+  }
+
+  @Override
+  public void remove(int offs, int len) throws BadLocationException {
+    super.remove(offs, len);
+    enterButton.setEnabled(getLength() >= minLength);
+  }
+}