com.bdaum.zoom.ui.internal.dialogs.TimeShiftDialog.java Source code

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Here is the source code for com.bdaum.zoom.ui.internal.dialogs.TimeShiftDialog.java

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/*
 * This file is part of the ZoRa project: http://www.photozora.org.
 *
 * ZoRa is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * ZoRa is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ZoRa; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * (c) 2009 Berthold Daum  
 */

package com.bdaum.zoom.ui.internal.dialogs;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
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.Spinner;

import com.bdaum.zoom.ui.dialogs.ZTitleAreaDialog;
import com.bdaum.zoom.ui.internal.HelpContextIds;

public class TimeShiftDialog extends ZTitleAreaDialog implements SelectionListener {

    private long shift = 0L;
    private Spinner hourField;
    private Spinner minuteField;
    private Spinner secondField;

    public TimeShiftDialog(Shell parentShell) {
        super(parentShell, HelpContextIds.TIMEHSHIFT_DIALOG);
    }

    @Override
    public void create() {
        super.create();
        setTitle(Messages.TimeShiftDialog_apply_time_shift);
        setMessage(Messages.TimeShiftDialog_specify_a_shift_value);
        updateButtons();
    }

    @Override
    protected Control createDialogArea(Composite parent) {
        Composite area = (Composite) super.createDialogArea(parent);
        final Composite comp = new Composite(area, SWT.NONE);
        final GridLayout gridLayout = new GridLayout(2, false);
        comp.setLayout(gridLayout);
        new Label(comp, SWT.NONE).setText(Messages.TimeShiftDialog_hours);
        hourField = new Spinner(comp, SWT.BORDER);
        hourField.setMinimum(-876600);
        hourField.setMaximum(876600);
        hourField.addSelectionListener(this);
        new Label(comp, SWT.NONE).setText(Messages.TimeShiftDialog_minutes);
        minuteField = new Spinner(comp, SWT.BORDER);
        minuteField.setMinimum(-59);
        minuteField.setMaximum(59);
        minuteField.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
        minuteField.addSelectionListener(this);
        new Label(comp, SWT.NONE).setText(Messages.TimeShiftDialog_seconds);
        secondField = new Spinner(comp, SWT.BORDER);
        secondField.setMinimum(-59);
        secondField.setMaximum(59);
        secondField.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
        secondField.addSelectionListener(this);
        return area;
    }

    @Override
    protected void okPressed() {
        shift = getTimeShift();
        super.okPressed();
    }

    private long getTimeShift() {
        return ((hourField.getSelection() * 60 + minuteField.getSelection()) * 60 + secondField.getSelection())
                * 1000L;
    }

    public long getResult() {
        return shift;
    }

    public void widgetDefaultSelected(SelectionEvent e) {
        // do nothing
    }

    public void widgetSelected(SelectionEvent e) {
        updateButtons();
    }

    private void updateButtons() {
        boolean enabled = getTimeShift() != 0;
        getShell().setModified(enabled);
        getButton(IDialogConstants.OK_ID).setEnabled(enabled);
    }

}