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  /*
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 package org.netbeans.modules.websvc.design.view.widget;
 
 import java.awt.Shape;
 import java.util.Map;
Class ExpanderWidget provides a simple icon widget for controlling the expanded/collapsed state of another widget. This widget can be added to any widget, and given an instance of ExpandableWidget, it can make that object expand or collapse each time the icon is clicked by the user. It is up to the ExpandableWidget implementation to determine how the size of the widget is altered. This class provides one or more methods for altering the widget size.

Author(s):
Ajit Bhate
radval
Nathan Fiedler
 
 public class ExpanderWidget extends ButtonWidget {

    
Cache of the expanded state of ExpandableWidget instances. This is used to restore the original state of an expandable if it is created again, say as a result of an undo/redo operation.
 
     private static Map<ObjectBooleanexpandedCache;
    
The expandable (content) widget.
 
     private ExpandableWidget expandable;
     static {
          = new WeakHashMap<ObjectBoolean>();
     }

    
Creates a new instance of ExpanderWidget.

Parameters:
scene the Scene to contain this widget.
expandable the expandable widget this expander will control.
expanded true if widget is initially expanded, false if collapsed.
 
     public ExpanderWidget(Scene sceneExpandableWidget expandableboolean expanded) {
         super(scene, (Stringnull);
         this. = expandable;
         setImage(new ExpanderImageWidget(scenetrue, 8, 30));
         setSelectedImage(new ExpanderImageWidget(scenefalse, 8, 30));
         setSelected(expanded);
         setRoundedBorder(0, 4, 4, null);
         setAction(new AbstractAction() {
 
             public void actionPerformed(ActionEvent arg0) {
                 ExpanderWidget.this..setExpanded(!ExpanderWidget.this..isExpanded());
            }
        });
    }

    
Retrieve the former expanded state of the given expandable. If the expandable state was not cached (or the cache has been cleaned by the garbage collector), this method returns the value of the def parameter.

Parameters:
expandable the ExpandableWidget to query.
def default value for the expanded state.
Returns:
true if expanded, false if collapsed.
    public static boolean isExpanded(ExpandableWidget expandableboolean def) {
        Boolean val = .get(expandable.hashKey());
        return val != null ? val.booleanValue() : def;
    }

    
Set the expanded state of the widget.

Parameters:
expanded true to expand, false to collapse.
    @Override
    public void setSelected(boolean expanded) {
        // Save the state of the expandable in case it gets recreated later.
        .put(.hashKey(), Boolean.valueOf(expanded));
        super.setSelected(expanded);
        revalidate(true);
    }
    private static class ExpanderImageWidget extends ImageLabelWidget.PaintableImageWidget {
        private static final Stroke STROKE = new BasicStroke(2.5F, ..);
        private double cos;
        public ExpanderImageWidget(Scene sceneboolean upint sizeint degrees) {
            super(scenesizesize);
            double radians = . * degrees / 180.0;
             = Math.cos(radians / 2.0);
            if (!up) {
                 = -;
            }
        }
        protected Stroke getImageStroke() {
            return ;
        }
        protected Shape createImage(int widthint height) {
            GeneralPath path = new GeneralPath();
            float y1 = (float) (height+*height/2) / 2;
            float y2 = (float) (height-*height/2) / 2;
            path.moveTo(width / 2f, y1);
            path.lineTo(0, y2);
            path.moveTo(width / 2f, y1);
            path.lineTo(widthy2);
            return path;
        }
    }
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