Shows how that a ComboBox cannot ititially be set to enabled(false) in LocalInspection

TestInspection.java

/*
 * Copyright (c) 2016 Patrick Scheibe
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package de.halirutan.mathematica.codeinsight.inspections.bugs;

import com.intellij.codeInspection.LocalInspectionTool;
import com.intellij.codeInspection.LocalInspectionToolSession;
import com.intellij.codeInspection.ProblemsHolder;
import com.intellij.openapi.ui.ComboBox;
import com.intellij.openapi.ui.VerticalFlowLayout;
import com.intellij.psi.PsiElementVisitor;
import org.jetbrains.annotations.Nls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TestInspection extends LocalInspectionTool {

  public enum TestValues {VALUE_1, VALUE_2, VALUE_3}

  @Nullable
  @Override
  public JComponent createOptionsPanel() {
    final JPanel panel = new JPanel(new VerticalFlowLayout(VerticalFlowLayout.TOP));
    final ComboBox comboBox = new ComboBox(TestValues.values());
    panel.add(comboBox);
    comboBox.setEditable(false);
    comboBox.setEnabled(false);
    comboBox.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        comboBox.setEnabled(false);
      }
    });
    return panel;
  }

  @Nls
  @NotNull
  @Override
  public String getDisplayName() {
    return "Test Inspection";
  }

  @Nullable
  @Override
  public String getStaticDescription() {
    return "Test inspection to show how ComboBox works";
  }

  @Nls
  @NotNull
  @Override
  public String getGroupDisplayName() {
    return "Test Group";
  }

  @NotNull
  @Override
  public PsiElementVisitor buildVisitor(@NotNull final ProblemsHolder holder, final boolean isOnTheFly, @NotNull LocalInspectionToolSession session) {
   return PsiElementVisitor.EMPTY_VISITOR;
  }

}