Ptidej-v5.2-master/POM Tests/data/ArgoUML_0.28/src/org/argouml/uml/diagram/ui/ArgoFigUtil.java
// $Id: ArgoFigUtil.java 16345 2008-12-12 09:51:07Z mvw $
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package org.argouml.uml.diagram.ui;

import java.awt.Color;

import org.argouml.kernel.Project;
import org.argouml.kernel.ProjectManager;
import org.argouml.uml.diagram.UMLMutableGraphSupport;
import org.tigris.gef.base.Editor;
import org.tigris.gef.base.Globals;
import org.tigris.gef.base.Layer;
import org.tigris.gef.base.LayerPerspective;
import org.tigris.gef.graph.GraphModel;
import org.tigris.gef.presentation.Fig;
import org.tigris.gef.presentation.FigCircle;
import org.tigris.gef.presentation.FigEdge;
import org.tigris.gef.presentation.FigRect;

/**
 * Static utility methods for use with ArgoFigs.
 * 
 * @author Tom Morris <tfmorris@gmail.com>
 */
public class ArgoFigUtil {
    
    /**
     * Find the Project that contains a given figure.  Because we don't have
     * a single reliable way to do this, we try a bunch of different approaches.
     * 
     * @param fig the Fig to return the project of
     * @return the project containing the given fig
     */
    public static Project getProject(ArgoFig fig) {
        if (fig instanceof Fig) {
            Fig f = (Fig) fig;
            LayerPerspective layer = (LayerPerspective) f.getLayer();
            if (layer == null) {
                /* TODO: Without this, we fail to draw e.g. a Class.
                 * But is this a good solution? 
                 * Why is the Layer not set in the constructor? */
                Editor editor = Globals.curEditor();
                if (editor == null) {
                    // TODO: The above doesn't work reliably in a constructor.
                    // We need a better way of getting default fig settings 
                    // for the owning project rather than using the 
                    // project manager singleton. - tfm
                    return ProjectManager.getManager().getCurrentProject();
                }
                Layer lay = editor.getLayerManager().getActiveLayer();
                if (lay instanceof LayerPerspective) {
                    layer = (LayerPerspective) lay;
                }
            }
            if (layer == null) {
                return ProjectManager.getManager().getCurrentProject();
            }
            GraphModel gm = layer.getGraphModel();
            if (gm instanceof UMLMutableGraphSupport) {
                Project project = ((UMLMutableGraphSupport) gm).getProject();
                if (project != null) {
                    return project;
                }
            }
            return ProjectManager.getManager().getCurrentProject();
        }
        return null;
    }


    /**
     * Add pretty little markers for debugging purposes. We use three markers so
     * you can see the anchor, the computed target position, and how collision
     * detection affects a largish box.
     */
    static void markPosition(FigEdge fe, 
            int pct, int delta, int angle, int offset,
            Color color) {
        // set this to true on to enable debugging figs
        if (false) {
            Fig f;
            f = new FigCircle(0, 0, 5, 5, color, Color.red);
            // anchor position
            fe.addPathItem(f, new PathItemPlacement(fe, f, pct, delta, angle, 
                    0));
            f = new FigRect(0, 0, 100, 20, color, Color.red);
            f.setFilled(false);
            fe.addPathItem(f, new PathItemPlacement(fe, f, pct, delta, angle,
                    offset));
            f = new FigCircle(0, 0, 5, 5, color, Color.blue);
            fe.addPathItem(f, new PathItemPlacement(fe, f, pct, delta, angle,
                    offset));
        }
    }
}
