org.eclipse.actf.ai.voice.preferences.util.ComboButtonFieldEditor.java Source code

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Here is the source code for org.eclipse.actf.ai.voice.preferences.util.ComboButtonFieldEditor.java

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/*******************************************************************************
 * Copyright (c) 2007, 2008 IBM Corporation and Others
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Takashi ITOH - initial API and implementation
 *******************************************************************************/
package org.eclipse.actf.ai.voice.preferences.util;

import org.eclipse.actf.ai.voice.internal.Messages;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;

/**
 * ComboButtonFieldEditor has a combobox with a button.
 */
public class ComboButtonFieldEditor extends ComboFieldEditor {

    private Button testButton;

    private String testButtonText;

    protected ComboButtonFieldEditor(String name, String labelText, String[][] labelsAndValues, Composite parent) {
        super(name, labelText, labelsAndValues, parent);
    }

    protected void adjustForNumColumns(int numColumns) {
        super.adjustForNumColumns(numColumns - 1);
    }

    protected void doFillIntoGrid(Composite parent, int numColumns) {
        super.doFillIntoGrid(parent, numColumns - 1);
        testButton = getButtonControl(parent);
        GridData gd = new GridData();
        gd.horizontalAlignment = GridData.FILL;
        int widthHint = convertHorizontalDLUsToPixels(testButton, IDialogConstants.BUTTON_WIDTH);
        gd.widthHint = Math.max(widthHint, testButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
        testButton.setLayoutData(gd);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.actf.ai.voice.preferences.ComboFieldEditor#getNumberOfControls()
     */
    public int getNumberOfControls() {
        return super.getNumberOfControls() + 1;
    }

    protected void testPressed(int index) {
    }

    protected Button getButtonControl(Composite parent) {
        if (testButton == null) {
            testButton = new Button(parent, SWT.PUSH);
            if (testButtonText == null)
                testButtonText = Messages.voice_test;
            testButton.setText(testButtonText);
            testButton.setFont(parent.getFont());
            testButton.addSelectionListener(new SelectionAdapter() {
                public void widgetSelected(SelectionEvent evt) {
                    testPressed(comboField.getSelectionIndex());
                }
            });
            testButton.addDisposeListener(new DisposeListener() {
                public void widgetDisposed(DisposeEvent event) {
                    testButton = null;
                }
            });
        } else {
            checkParent(testButton, parent);
        }
        return testButton;
    }

    /**
     * @param text
     *            the text of the button.
     */
    public void setTestButtonText(String text) {
        assert text != null;
        testButtonText = text;
        if (testButton != null)
            testButton.setText(text);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.actf.ai.voice.preferences.ComboFieldEditor#setEnabled(boolean,
     *      org.eclipse.swt.widgets.Composite)
     */
    public void setEnabled(boolean enabled, Composite parent) {
        super.setEnabled(enabled, parent);
        if (testButton != null) {
            testButton.setEnabled(enabled);
        }
    }
}