/* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2004, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.tools.edit.behaviour;
import java.util.ArrayList;
import java.util.List;
import org.locationtech.udig.project.command.UndoRedoCommand;
import org.locationtech.udig.project.command.UndoableComposite;
import org.locationtech.udig.project.command.UndoableMapCommand;
import org.locationtech.udig.project.ui.render.displayAdapter.MapMouseEvent;
import org.locationtech.udig.tools.edit.EditPlugin;
import org.locationtech.udig.tools.edit.EditState;
import org.locationtech.udig.tools.edit.EditToolHandler;
import org.locationtech.udig.tools.edit.EventBehaviour;
import org.locationtech.udig.tools.edit.EventType;
import org.locationtech.udig.tools.edit.commands.SelectVertexCommand;
import org.locationtech.udig.tools.edit.commands.SetEditStateCommand;
import org.locationtech.udig.tools.edit.commands.SelectVertexCommand.Type;
import org.locationtech.udig.tools.edit.preferences.PreferenceUtil;
import org.locationtech.udig.tools.edit.support.EditBlackboard;
import org.locationtech.udig.tools.edit.support.EditGeom;
import org.locationtech.udig.tools.edit.support.Point;
import org.locationtech.udig.tools.edit.support.Selection;
import org.eclipse.core.runtime.NullProgressMonitor;
/**
* <p>Requirements:
* <ul>
* <li>eventType PRESSED</li>
* <li>handler has currentGeom</li>
* <li>edit state is modified or NONE</li>
*</ul>
* </p>
* <p>Action:
* <ul>
* <li>adds selected vertex</li>
* <li>sets Edit State to Modified</li>
*</ul>
* </p>
* @author jones
* @since 1.1.0
*/
public class SelectVertexOnMouseDownBehaviour implements EventBehaviour {
public boolean isValid( EditToolHandler handler, MapMouseEvent e, EventType eventType ) {
boolean currentGeomNotNull = handler.getCurrentGeom()!=null;
boolean eventTypePressed = eventType==EventType.PRESSED;
boolean button1Changed=e.button==MapMouseEvent.BUTTON1;
EditBlackboard editBlackboard = handler.getEditBlackboard(handler.getEditLayer());
boolean overPoint = editBlackboard.overVertex(Point.valueOf(e.x,e.y), PreferenceUtil.instance().getVertexRadius())!=null;
return currentGeomNotNull && eventTypePressed && button1Changed
&& !e.modifiersDown() && e.buttons==MapMouseEvent.BUTTON1 && overPoint;
}
public UndoableMapCommand getCommand( EditToolHandler handler, MapMouseEvent e, EventType eventType ) {
if( !isValid(handler, e, eventType) )
throw new IllegalArgumentException("Not valid state", new Exception()); //$NON-NLS-1$
EditBlackboard editBlackboard = handler.getEditBlackboard(handler.getEditLayer());
Point point = handler.getEditBlackboard(handler.getEditLayer()).overVertex(Point.valueOf(e.x,e.y), PreferenceUtil.instance().getVertexRadius());
List<EditGeom> geoms = null;
if( point != null )
geoms= editBlackboard.getGeoms(point.getX(),point.getY());
else{
EditPlugin.trace(EditPlugin.SELECTION, "VertexSelectorBehaviour: Not over vertex (" //$NON-NLS-1$
+e.x+","+e.y+")", null); //$NON-NLS-1$ //$NON-NLS-2$
return null;
}
Selection selection = editBlackboard.getSelection();
List<UndoableMapCommand> commands=new ArrayList<UndoableMapCommand>();
if( !selection.contains(point) )
commands.add( new SelectVertexCommand(editBlackboard, point, Type.SET) );
if( geoms!=null && geoms.contains(handler.getCurrentGeom()) ){
if( handler.getCurrentState()==EditState.NONE){
commands.add( new SetEditStateCommand( handler, EditState.MODIFYING ) );
}
}
if( commands.size() == 0)
return null;
else{
UndoableComposite undoableComposite = new UndoableComposite(commands);
undoableComposite.setMap(handler.getContext().getMap());
try {
undoableComposite.execute(new NullProgressMonitor());
} catch (Exception e1) {
throw (RuntimeException) new RuntimeException( ).initCause( e1 );
}
return new UndoRedoCommand(undoableComposite);
}
}
public void handleError( EditToolHandler handler, Throwable error, UndoableMapCommand command ) {
EditPlugin.log("", error); //$NON-NLS-1$
}
}