package org.simantics.g3d.vtk.swt;

import java.util.Collection;

import org.eclipse.jface.action.Action;
import org.simantics.g3d.vtk.Activator;
import org.simantics.g3d.vtk.common.VtkView;

import vtk.vtkProp;
import vtk.vtkProp3D;

public class FocusAction extends Action {
	
    VtkView view;
    vtkCameraAndSelectorAction cameraAndSelectorAction;
	Collection<vtkProp> props;
	
	public FocusAction(VtkView view, vtkCameraAndSelectorAction cameraAndSelectorAction) {
		super("Focus");
		setImageDescriptor(Activator.imageDescriptorFromPlugin("com.famfamfam.silk", "icons/eye.png"));
		this.view = view;
		this.cameraAndSelectorAction = cameraAndSelectorAction;
	}
	
	public void setProps(Collection<vtkProp> props) {
		this.props = props;
	}
	
	@Override
	public void run() {
		view.getThreadQueue().asyncExec(new Runnable() {
			
			@Override
			public void run() {
				int count = 0;
				double loc[] = new double[] {0,0,0};
				for (vtkProp prop : props) {
					if (prop instanceof vtkProp3D) {
						vtkProp3D prop3d = (vtkProp3D)prop;
						double l[] = prop3d.GetCenter();
						for (int i = 0; i < 3; i++)
							loc[i] = loc[i] + l[i]; 
						count++;
					}
				}
				if (count > 0) {
					for (int i = 0; i < 3; i++)
						loc[i] = loc[i] / count;
					cameraAndSelectorAction.focus(loc[0],loc[1],loc[2]);
					view.refresh();
				}
				
			}
		});
	}
}