au.gov.ga.earthsci.application.parts.globe.handlers.GotoCoordinateDialog.java Source code

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Here is the source code for au.gov.ga.earthsci.application.parts.globe.handlers.GotoCoordinateDialog.java

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/*******************************************************************************
 * Copyright 2012 Geoscience Australia
 * 
 * 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 au.gov.ga.earthsci.application.parts.globe.handlers;

import gov.nasa.worldwind.WorldWind;
import gov.nasa.worldwind.WorldWindow;
import gov.nasa.worldwind.geom.LatLon;
import gov.nasa.worldwind.geom.Position;
import gov.nasa.worldwind.globes.Globe;
import gov.nasa.worldwind.view.orbit.OrbitView;

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.Button;
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;

import au.gov.ga.earthsci.application.parts.globe.Messages;
import au.gov.ga.earthsci.worldwind.common.util.Util;
import au.gov.ga.earthsci.worldwind.common.view.orbit.FlyToOrbitViewAnimator;

/**
 * Dialog which allows a user to input coordinates they wish to fly to.
 * 
 * @author Michael de Hoog (michael.dehoog@ga.gov.au)
 */
public class GotoCoordinateDialog extends Dialog {
    private final WorldWindow wwd;
    private LatLon latlon = null;
    private Button okButton = null;

    public GotoCoordinateDialog(Shell parentShell, WorldWindow wwd) {
        super(parentShell);
        this.wwd = wwd;
    }

    @Override
    protected void configureShell(Shell shell) {
        super.configureShell(shell);
        shell.setText(Messages.GotoCoordinateDialog_GotoCoordinates);
    }

    @Override
    protected Control createDialogArea(Composite parent) {
        Composite composite = (Composite) super.createDialogArea(parent);
        composite.setLayout(new GridLayout());

        Label label = new Label(composite, SWT.NONE);
        String prefix = "     "; //$NON-NLS-1$
        String supported = Messages.GotoCoordinateDialog_Supports + ":\n"; //$NON-NLS-1$
        supported += prefix + "-27.0 133.5\n"; //$NON-NLS-1$
        supported += prefix + "27.0S 133.5E\n"; //$NON-NLS-1$
        supported += prefix + "-27\u00B00'0\" 133\u00B030'0\"\n"; //$NON-NLS-1$
        supported += prefix + "27d0'0\"S 133d30'0\"E\n"; //$NON-NLS-1$
        supported += prefix + "53J 351167E 7012680N\n"; //$NON-NLS-1$
        supported += prefix + "53JLL 51167 12680\n "; //$NON-NLS-1$
        label.setText(supported);

        label = new Label(composite, SWT.NONE);
        label.setText(Messages.GotoCoordinateDialog_EnterCoordinates + ':');

        final Text text = new Text(composite, SWT.BORDER);
        text.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
        text.setToolTipText(Messages.GotoCoordinateDialog_TypeCoordinates);

        final Label resultLabel = new Label(composite, SWT.NONE);
        resultLabel.setText(" "); //$NON-NLS-1$

        text.addModifyListener(new ModifyListener() {
            @Override
            public void modifyText(ModifyEvent e) {
                boolean valid = false;
                if (text.getText().length() == 0) {
                    latlon = null;
                    resultLabel.setText(" "); //$NON-NLS-1$
                } else {
                    latlon = stringToLatLon(text.getText());
                    if (latlon == null) {
                        resultLabel.setText(Messages.GotoCoordinateDialog_InvalidCoordinates);
                    } else {
                        resultLabel.setText(
                                String.format("Lat %7.4f\u00B0 Lon %7.4f\u00B0", latlon.getLatitude().degrees, //$NON-NLS-1$
                                        latlon.getLongitude().degrees));
                        valid = true;
                    }
                }
                resultLabel.pack();
                if (okButton != null) {
                    okButton.setEnabled(valid);
                }
            }
        });

        return composite;
    }

    @Override
    protected Button createButton(Composite parent, int id, String label, boolean defaultButton) {
        Button button = super.createButton(parent, id, label, defaultButton);
        if (id == IDialogConstants.OK_ID) {
            okButton = button;
            button.setEnabled(false);
        }
        return button;
    }

    @Override
    protected void okPressed() {
        if (latlon != null && wwd.getView() instanceof OrbitView) {
            OrbitView view = (OrbitView) wwd.getView();

            Position beginCenter = view.getCenterPosition();
            Position center = new Position(latlon, 0);
            long lengthMillis = Util.getScaledLengthMillis(1, beginCenter, center);

            view.addAnimator(FlyToOrbitViewAnimator.createFlyToOrbitViewAnimator(view, beginCenter, center,
                    view.getHeading(), view.getHeading(), view.getPitch(), view.getPitch(), view.getZoom(),
                    view.getZoom(), lengthMillis, WorldWind.ABSOLUTE));
            wwd.redraw();
        }

        super.okPressed();
    }

    private LatLon stringToLatLon(String s) {
        Globe globe = wwd.getModel().getGlobe();
        LatLon ll = Util.computeLatLonFromString(s, globe);
        if (ll == null) {
            ll = Util.computeLatLonFromUTMString(s, globe, false);
        }
        return ll;
    }
}