/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2011, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotools.swt.utils;
import org.eclipse.jface.action.ControlContribution;
import org.eclipse.jface.action.StatusLineLayoutData;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
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.geotools.geometry.jts.ReferencedEnvelope;
import org.geotools.map.event.MapBoundsEvent;
import org.geotools.map.event.MapBoundsListener;
import org.geotools.swt.SwtMapPane;
import org.geotools.swt.control.CRSChooserDialog;
import org.geotools.swt.event.MapPaneAdapter;
import org.geotools.swt.event.MapPaneEvent;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
/**
* The {@link CoordinateReferenceSystem} button to put on the statusbar.
*
* @author Andrea Antonello - www.hydrologis.com
*
*
*
* @source $URL$
*/
public class CrsStatusBarButton extends ControlContribution implements MapBoundsListener {
public final static String ID = "eu.hydrologis.toolbar.toponimicombo"; //$NON-NLS-1$
private final SwtMapPane mapPane;
private Button crsButton;
private MapPaneAdapter mapPaneListener;
public CrsStatusBarButton( SwtMapPane mapPane ) {
this(ID, mapPane);
}
protected CrsStatusBarButton( String id, SwtMapPane mapPane ) {
super(id);
this.mapPane = mapPane;
}
@Override
protected Control createControl( Composite parent ) {
createListeners();
mapPane.addMapPaneListener(mapPaneListener);
mapPane.getMapContent().addMapBoundsListener(this);
Composite mainComposite = new Composite(parent, SWT.NONE);
GridLayout gridLayout = new GridLayout(1, false);
mainComposite.setLayout(gridLayout);
StatusLineLayoutData statusLineLayoutData = new StatusLineLayoutData();
// statusLineLayoutData.widthHint = 500;
mainComposite.setLayoutData(statusLineLayoutData);
crsButton = new Button(mainComposite, SWT.PUSH);
GridData crsButtonGD = new GridData(SWT.BEGINNING, SWT.CENTER, false, false);
crsButtonGD.widthHint = 300;
crsButton.setLayoutData(crsButtonGD);
CoordinateReferenceSystem crs = getCrs();
displayCRS(crs);
crsButton.addSelectionListener(new SelectionAdapter(){
public void widgetSelected( SelectionEvent e ) {
CRSChooserDialog dialog = new CRSChooserDialog(crsButton.getShell(), getCrs());
dialog.setBlockOnOpen(true);
dialog.open();
CoordinateReferenceSystem newCrs = dialog.getResult();
mapPane.setCrs(newCrs);
mapPane.redraw();
displayCRS(newCrs);
}
});
return mainComposite;
}
private CoordinateReferenceSystem getCrs() {
return mapPane.getMapContent().getCoordinateReferenceSystem();
}
private void displayCRS( CoordinateReferenceSystem crs ) {
if (crs == null) {
crsButton.setText(Messages.getString("crs_undefined"));
} else {
crsButton.setText(crs.getName().toString());
}
}
/**
* Initialize the mouse and map bounds listeners
*/
private void createListeners() {
mapPaneListener = new MapPaneAdapter(){
@Override
public void onDisplayAreaChanged( MapPaneEvent ev ) {
ReferencedEnvelope env = mapPane.getDisplayArea();
if (env != null) {
displayCRS(env.getCoordinateReferenceSystem());
}
}
@Override
public void onResized( MapPaneEvent ev ) {
ReferencedEnvelope env = mapPane.getDisplayArea();
if (env != null) {
displayCRS(env.getCoordinateReferenceSystem());
}
}
@Override
public void onRenderingStarted( MapPaneEvent ev ) {
}
@Override
public void onRenderingStopped( MapPaneEvent ev ) {
}
@Override
public void onRenderingProgress( MapPaneEvent ev ) {
}
};
}
public void mapBoundsChanged( MapBoundsEvent event ) {
ReferencedEnvelope env = mapPane.getDisplayArea();
if (env != null) {
displayCRS(env.getCoordinateReferenceSystem());
}
}
}