org.csstudio.auth.ui.internal.preferences.SystemPropertyDialog.java Source code

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Here is the source code for org.csstudio.auth.ui.internal.preferences.SystemPropertyDialog.java

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/*
 * Copyright (c) 2008 Stiftung Deutsches Elektronen-Synchrotron,
 * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
 *
 * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS.
 * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT. 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. SHOULD THE SOFTWARE PROVE DEFECTIVE
 * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR
 * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.
 * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
 * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
 * OR MODIFICATIONS.
 * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION,
 * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS
 * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY
 * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM
 */
package org.csstudio.auth.ui.internal.preferences;

import org.csstudio.auth.ui.internal.localization.Messages;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

/**
 * Dialog for editing system properties (key-value-pairs).
 *
 * @author Joerg Rathlev
 */
class SystemPropertyDialog extends Dialog {

    /**
     * The key.
     */
    private String _key = ""; //$NON-NLS-1$

    /**
     * The value.
     */
    private String _value = ""; //$NON-NLS-1$

    /**
     * Creates a new dialog.
     * @param parentShell the parent shell.
     */
    protected SystemPropertyDialog(final Shell parentShell) {
        super(parentShell);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void configureShell(final Shell newShell) {
        super.configureShell(newShell);
        newShell.setText(Messages.SystemPropertyDialog_TITLE);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected Control createDialogArea(final Composite parent) {
        Composite parentComposite = (Composite) super.createDialogArea(parent);

        Composite contents = new Composite(parentComposite, SWT.NULL);
        GridLayout layout = new GridLayout();
        layout.marginHeight = 0;
        layout.marginWidth = 0;
        layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
        layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
        layout.numColumns = 2;
        contents.setLayout(layout);
        contents.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, true));
        contents.setFont(parentComposite.getFont());

        Label keyLabel = new Label(contents, SWT.NULL);
        keyLabel.setText(Messages.SystemPropertyDialog_KEY_LABEL);
        final Text keyText = new Text(contents, SWT.SINGLE | SWT.BORDER);
        GridData layoutData = new GridData(SWT.FILL, SWT.BEGINNING, true, false);
        layoutData.widthHint = 250;
        keyText.setLayoutData(layoutData);
        keyText.setText(_key);
        keyText.addModifyListener(new ModifyListener() {
            public void modifyText(final ModifyEvent e) {
                if (e.widget == keyText) {
                    _key = keyText.getText();
                    // enable the OK button if the "key" field contains not
                    // just whitespace
                    getButton(IDialogConstants.OK_ID).setEnabled(!_key.trim().equals("")); //$NON-NLS-1$
                }
            }
        });

        Label valueLabel = new Label(contents, SWT.NULL);
        valueLabel.setText(Messages.SystemPropertyDialog_VALUE_LABEL);
        final Text valueText = new Text(contents, SWT.SINGLE | SWT.BORDER);
        valueText.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
        valueText.setText(_value);
        valueText.addModifyListener(new ModifyListener() {
            public void modifyText(final ModifyEvent e) {
                if (e.widget == valueText) {
                    _value = valueText.getText();
                }
            }
        });

        return contents;
    }

    /**
     * Creates the standard dialog buttons OK and Cancel and disables the OK
     * button.
     * @param parent the button bar composite.
     */
    @Override
    protected void createButtonsForButtonBar(final Composite parent) {
        super.createButtonsForButtonBar(parent);
        getButton(IDialogConstants.OK_ID).setEnabled(false);
    }

    /**
     * @return the key.
     */
    String getKey() {
        return _key;
    }

    /**
     * @return the value.
     */
    String getValue() {
        return _value;
    }
}