1 files changed, 104 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/gui/configurator/EnumParameterConfigurator.java b/src/de/lmu/ifi/dbs/elki/gui/configurator/EnumParameterConfigurator.java
new file mode 100644
index 00000000..ad12b7ce
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/gui/configurator/EnumParameterConfigurator.java
@@ -0,0 +1,104 @@
+package de.lmu.ifi.dbs.elki.gui.configurator;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2011
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import java.awt.GridBagConstraints;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.JComboBox;
+import javax.swing.JComponent;
+
+import de.lmu.ifi.dbs.elki.gui.util.DynamicParameters;
+import de.lmu.ifi.dbs.elki.logging.LoggingUtil;
+import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameters.EnumParameter;
+
+/**
+ * Panel to configure EnumParameters by offering a dropdown to choose from.
+ * 
+ * TODO: offer radio buttons when just a few choices are available?
+ * 
+ * @author Erich Schubert
+ * 
+ * @apiviz.uses EnumParameter
+ */
+public class EnumParameterConfigurator extends AbstractSingleParameterConfigurator<EnumParameter<?>> implements ActionListener {
+  final JComboBox value;
+
+  public EnumParameterConfigurator(EnumParameter<?> cp, JComponent parent) {
+    super(cp, parent);
+    // Input field
+    {
+      GridBagConstraints constraints = new GridBagConstraints();
+      constraints.fill = GridBagConstraints.HORIZONTAL;
+      constraints.weightx = 1.0;
+      value = new JComboBox();
+      value.setToolTipText(param.getShortDescription());
+      value.setPrototypeDisplayValue(cp.getPossibleValues().iterator().next());
+      parent.add(value, constraints);
+      finishGridRow();
+    }
+
+    if(!param.tookDefaultValue() && param.isDefined() && param.getGivenValue() != null) {
+      value.addItem(param.getValueAsString());
+      value.setSelectedIndex(0);
+    }
+
+    // For parameters with a default value, offer using the default
+    // For optional parameters, offer not specifying them.
+    if(cp.hasDefaultValue()) {
+      value.addItem(DynamicParameters.STRING_USE_DEFAULT + " " + cp.getDefaultValueAsString());
+    }
+    else if(cp.isOptional()) {
+      value.addItem(DynamicParameters.STRING_OPTIONAL);
+    }
+    // Offer the shorthand version of class names.
+    for(String s : cp.getPossibleValues()) {
+      value.addItem(s);
+    }
+    value.addActionListener(this);
+  }
+
+  @Override
+  public void actionPerformed(ActionEvent e) {
+    if(e.getSource() == value) {
+      fireValueChanged();
+    }
+    else {
+      LoggingUtil.warning("actionPerformed triggered by unknown source: " + e.getSource());
+    }
+  }
+
+  @Override
+  public String getUserInput() {
+    String val = (String) value.getSelectedItem();
+    if(val.startsWith(DynamicParameters.STRING_USE_DEFAULT)) {
+      return null;
+    }
+    if(val == DynamicParameters.STRING_OPTIONAL) {
+      return null;
+    }
+    return val;
+  }
+}
+\ No newline at end of file