org.fusesource.ide.launcher.ui.debug.editors.BooleanVariableEditor.java Source code

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Here is the source code for org.fusesource.ide.launcher.ui.debug.editors.BooleanVariableEditor.java

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/*******************************************************************************
 * Copyright (c) 2014 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.fusesource.ide.launcher.ui.debug.editors;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.TrayDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

/**
 * @author lhein
 *
 */
public class BooleanVariableEditor extends TrayDialog {

    /**
     * The title of the dialog.
     */
    private String title;

    /**
     * The message to display, or <code>null</code> if none.
     */
    private String message;

    /**
     * The input value
     */
    private boolean value = false;

    /**
     * Ok button widget.
     */
    private Button okButton;

    /**
     * Input combo widget.
     */
    private Combo combo;

    /**
     * Creates an input dialog with OK and Cancel buttons.
     * Note that the dialog will have no visual representation (no widgets)
     * until it is told to open.
     * <p>
     * Note that the <code>open</code> method blocks for input dialogs.
     * </p>
     *
     * @param parentShell the parent shell
     * @param dialogTitle the dialog title, or <code>null</code> if none
     * @param dialogMessage the dialog message, or <code>null</code> if none
     * @param initialValue the initial input value
     */
    public BooleanVariableEditor(Shell parentShell, String dialogTitle, String dialogMessage,
            boolean initialValue) {
        super(parentShell);
        this.title = dialogTitle;
        message = dialogMessage;
        value = initialValue;
        setShellStyle(getShellStyle() | SWT.RESIZE);
    }

    /* (non-Javadoc)
     * Method declared on Dialog.
     */
    @Override
    protected void buttonPressed(int buttonId) {
        if (buttonId == IDialogConstants.OK_ID) {
            value = Boolean.parseBoolean(combo.getText());
        }
        super.buttonPressed(buttonId);
    }

    /* (non-Javadoc)
     * Method declared in Window.
     */
    @Override
    protected void configureShell(Shell shell) {
        super.configureShell(shell);
        if (title != null)
            shell.setText(title);
    }

    /* (non-Javadoc)
     * Method declared on Dialog.
     */
    @Override
    protected void createButtonsForButtonBar(Composite parent) {
        // create OK and Cancel buttons by default
        okButton = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
        createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);

        //do this here because setting the text will set enablement on the ok button
        combo.setFocus();
        combo.select(combo.indexOf(Boolean.toString(this.value)));
    }

    /* (non-Javadoc)
     * Method declared on Dialog.
     */
    @Override
    protected Control createDialogArea(Composite parent) {
        Font font = parent.getFont();
        // create composite
        Composite composite = (Composite) super.createDialogArea(parent);

        // create message
        if (message != null) {
            Label label = new Label(composite, SWT.WRAP);
            label.setText(message);
            GridData data = new GridData(
                    GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER);
            data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
            label.setLayoutData(data);
            label.setFont(font);
        }

        combo = new Combo(composite, SWT.READ_ONLY | SWT.BORDER);
        combo.add(Boolean.TRUE.toString());
        combo.add(Boolean.FALSE.toString());

        GridData gridData = new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL
                | GridData.GRAB_VERTICAL | GridData.VERTICAL_ALIGN_FILL);
        gridData.heightHint = 12;
        gridData.widthHint = 30;
        combo.setLayoutData(gridData);
        combo.setFont(font);
        combo.addSelectionListener(new SelectionAdapter() {

            /*
             * (non-Javadoc)
             * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
             */
            @Override
            public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {
                if (okButton.isEnabled()) {
                    return;
                }
                okButton.setEnabled(true);
            }
        });

        return composite;
    }

    /**
     * Returns the ok button.
     *
     * @return the ok button
     */
    protected Button getOkButton() {
        return okButton;
    }

    /**
     * Returns the combo.
     *
     * @return the combo
     */
    protected Combo getCombo() {
        return combo;
    }

    /**
     * Returns the selected value.
     *
     * @return the selected value
     */
    public boolean getValue() {
        return value;
    }

    @Override
    protected void okPressed() {
        if (okButton.isEnabled()) {
            super.okPressed();
        }
    }
}