package net.ms.designer.editors.workflow.policies;

import java.util.Iterator;

import net.ms.designer.editors.workflow.figures.WorkflowColorConstants;

import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.RectangleFigure;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.LayerConstants;
import org.eclipse.gef.editpolicies.ResizableEditPolicy;




/**
 * 
 */
public class WorkflowResizableEditPolicy
	extends ResizableEditPolicy
{

/**
 * Creates the figure used for feedback.
 * @return the new feedback figure
 */
protected IFigure createDragSourceFeedbackFigure() {
	IFigure figure = createFigure((GraphicalEditPart)getHost(), null);
	
	figure.setBounds(getInitialFeedbackBounds());
	addFeedback(figure);
	return figure;
}

protected IFigure createFigure(GraphicalEditPart part, IFigure parent) {
	IFigure child = getCustomFeedbackFigure(part.getModel());
		
	if (parent != null)
		parent.add(child);

	Rectangle childBounds = part.getFigure().getBounds().getCopy();
	
	IFigure walker = part.getFigure().getParent();
	
	while (walker != ((GraphicalEditPart)part.getParent()).getFigure()) {
		walker.translateToParent(childBounds);
		walker = walker.getParent();
	}
	
	child.setBounds(childBounds);
	
	Iterator i = part.getChildren().iterator();
	
	while (i.hasNext())
		createFigure((GraphicalEditPart)i.next(), child);
	
	return child;
}

protected IFigure getCustomFeedbackFigure(Object modelPart) {
	IFigure figure; 
	
		figure = new RectangleFigure();
		((RectangleFigure)figure).setXOR(true);
		((RectangleFigure)figure).setFill(true);
		figure.setBackgroundColor(WorkflowColorConstants.ghostFillColor);
		figure.setForegroundColor(ColorConstants.white);
	
	
	return figure;
}

/**
 * Returns the layer used for displaying feedback.
 *  
 * @return the feedback layer
 */
protected IFigure getFeedbackLayer() {
	return getLayer(LayerConstants.SCALED_FEEDBACK_LAYER);
}

/**
 * @see org.eclipse.gef.editpolicies.NonResizableEditPolicy#initialFeedbackRectangle()
 */
protected Rectangle getInitialFeedbackBounds() {
	return getHostFigure().getBounds();
}

}