source: osm/applications/editors/josm/plugins/wmsplugin/src/wmsplugin/WMSAdjustAction.java@ 12438

package wmsplugin; 

import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.Cursor;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.gui.MapFrame;
import org.openstreetmap.josm.actions.mapmode.MapMode;
import org.openstreetmap.josm.data.coor.EastNorth;
import org.openstreetmap.josm.tools.ImageProvider;
import org.openstreetmap.josm.gui.layer.Layer;


public class WMSAdjustAction extends MapMode implements
                MouseListener, MouseMotionListener{

        GeorefImage selectedImage;
        WMSLayer selectedLayer;
        boolean mouseDown;
        EastNorth prevEastNorth;

        public WMSAdjustAction(MapFrame mapFrame) {
                super(tr("Adjust WMS"), "adjustwms", 
                                                tr("Adjust the position of the WMS layer"), mapFrame, 
                                                ImageProvider.getCursor("normal", "move"));
        }

        @Override public void enterMode() {
                super.enterMode();
                Main.map.mapView.addMouseListener(this);
                Main.map.mapView.addMouseMotionListener(this);
        }

        @Override public void exitMode() {
                super.exitMode();
                Main.map.mapView.removeMouseListener(this);
                Main.map.mapView.removeMouseMotionListener(this);
        }

        @Override public void mousePressed(MouseEvent e) {
                if (e.getButton() != MouseEvent.BUTTON1)
                        return;

                 for(Layer layer:Main.map.mapView.getAllLayers()) {
                        if (layer.visible && layer instanceof WMSLayer) {
                                prevEastNorth=Main.map.mapView.getEastNorth(e.getX(),e.getY());
                                selectedLayer = ((WMSLayer)layer);
                                selectedImage = selectedLayer.findImage(prevEastNorth);
                                if(selectedImage!=null){
                                        Main.map.mapView.setCursor
                                                (Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
                                }
                        }
                }
        }

        @Override public void mouseDragged(MouseEvent e) {
                        /*
                if (e.getButton() != MouseEvent.BUTTON1)
                        return;
                        */

                if(selectedImage!=null) {
                        EastNorth eastNorth=
                                        Main.map.mapView.getEastNorth(e.getX(),e.getY());
                        selectedLayer.displace(eastNorth.east()-prevEastNorth.east(), 
                                eastNorth.north()-prevEastNorth.north());
                        prevEastNorth = eastNorth;
                        Main.map.mapView.repaint();
                }
        }

        @Override public void mouseReleased(MouseEvent e) {
                Main.map.mapView.repaint();
                Main.map.mapView.setCursor(Cursor.getDefaultCursor());
                selectedImage = null;   
                prevEastNorth = null;
                selectedLayer = null;
        }

        public void mouseEntered(MouseEvent e) {
        }
        public void mouseExited(MouseEvent e) {
        }
        public void mouseMoved(MouseEvent e) {
        }

        @Override public void mouseClicked(MouseEvent e) {
        }
}