android/testSrc/com/android/tools/idea/ui/properties/demo/AnyCheckedDemo.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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 com.android.tools.idea.ui.properties.demo;

import com.android.tools.idea.ui.properties.BindingsManager;
import com.android.tools.idea.ui.properties.ObservableValue;
import com.android.tools.idea.ui.properties.core.StringProperty;
import com.android.tools.idea.ui.properties.expressions.string.StringExpression;
import com.android.tools.idea.ui.properties.swing.SelectedProperty;
import com.android.tools.idea.ui.properties.swing.TextProperty;
import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import static com.android.tools.idea.ui.properties.expressions.bool.BooleanExpressions.any;

/**
 * Any checkboxes checked?
 * <p/>
 * This panel shows "Yes" if any of four checkboxes are checked.
 * <p/>
 * Demonstrates:
 * - How to wrap a collection of elements into a single expression
 * - How to create a one-off expression
 */
public final class AnyCheckedDemo {
  private JPanel myRootPanel;
  private JLabel myYesNoLabel;
  private JCheckBox myCheckBox1;
  private JCheckBox myCheckBox2;
  private JCheckBox myCheckBox3;
  private JCheckBox myCheckBox4;

  private BindingsManager myBindings = new BindingsManager(BindingsManager.SWING_INVOKE_LATER_STRATEGY);

  public static void main(String[] args) {
    //noinspection SSBasedInspection
    SwingUtilities.invokeLater(new Runnable() {
      @Override
      public void run() {
        final JFrame frame = new JFrame("SyncFieldsDemo");
        final AnyCheckedDemo demo = new AnyCheckedDemo();
        frame.setContentPane(demo.myRootPanel);
        demo.init();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
        frame.addWindowListener(new WindowAdapter() {
          @Override
          public void windowClosing(WindowEvent e) {
            demo.dispose();
          }
        });
      }
    });
  }

  public void init() {
    StringProperty yesNoText = new TextProperty(myYesNoLabel);
    myBindings.bind(yesNoText, new YesNoExpression(
      any(new SelectedProperty(myCheckBox1), new SelectedProperty(myCheckBox2), new SelectedProperty(myCheckBox3),
          new SelectedProperty(myCheckBox4))));
  }

  public void dispose() {
    myBindings.releaseAll(); // You should always remember to release your bindings!
  }

  /**
   * One-off expression that converts a boolean to "Yes" or "No"
   */
  private static final class YesNoExpression extends StringExpression {
    private final ObservableValue<Boolean> myValue;

    public YesNoExpression(ObservableValue<Boolean> value) {
      super(value);
      myValue = value;
    }

    @NotNull
    @Override
    public String get() {
      return myValue.get() ? "Yes" : "No";
    }
  }
}