com.intellij.uiDesigner.propertyInspector.editors.ComboBoxPropertyEditor.java Source code

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Here is the source code for com.intellij.uiDesigner.propertyInspector.editors.ComboBoxPropertyEditor.java

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/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.intellij.uiDesigner.propertyInspector.editors;

import com.intellij.openapi.ui.ComboBox;
import com.intellij.uiDesigner.propertyInspector.PropertyEditor;

import javax.swing.*;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import java.awt.*;

/**
 * @author Anton Katilin
 * @author Vladimir Kondratyev
 */
public abstract class ComboBoxPropertyEditor<V> extends PropertyEditor<V> {
    protected final ComboBox myCbx;

    public ComboBoxPropertyEditor() {
        myCbx = new ComboBox(-1);
        myCbx.setBorder(null);
        myCbx.addPopupMenuListener(new MyPopupMenuListener());
    }

    public final void updateUI() {
        SwingUtilities.updateComponentTreeUI(myCbx);
        final ListCellRenderer renderer = myCbx.getRenderer();
        if (renderer instanceof JComponent) {
            SwingUtilities.updateComponentTreeUI((JComponent) renderer);
        }
    }

    public V getValue() throws Exception {
        if (myCbx.isEditable()) {
            final Component editorComponent = myCbx.getEditor().getEditorComponent();
            //noinspection unchecked
            return (V) ((JTextField) editorComponent).getText();
        } else {
            //noinspection unchecked
            return (V) myCbx.getSelectedItem();
        }
    }

    private final class MyPopupMenuListener implements PopupMenuListener {
        private boolean myCancelled;

        public void popupMenuWillBecomeVisible(final PopupMenuEvent e) {
            myCancelled = false;
        }

        public void popupMenuWillBecomeInvisible(final PopupMenuEvent e) {
            if (!myCancelled) {
                fireValueCommitted(true, true);
            }
        }

        public void popupMenuCanceled(final PopupMenuEvent e) {
            myCancelled = true;
        }
    }
}