/**
* Adds all picked objects that are registered with this PickSupport and intersect the specified rectangle in AWT
* screen coordinates (if any) to the draw context's list of picked objects.
*
* @param dc the draw context which receives the picked objects.
* @param pickRect the rectangle in AWT screen coordinates.
* @param layer the layer associated with the picked objects.
*/
protected void doResolvePick(DrawContext dc, Rectangle pickRect, Layer layer)
{
// Get the unique pick colors in the specified screen rectangle. Use the minimum and maximum color codes to cull
// the number of colors that the draw context must consider with identifying the unique pick colors in the
// specified rectangle.
int[] colorCodes = dc.getPickColorsInRectangle(pickRect, this.minAndMaxColorCodes);
if (colorCodes == null || colorCodes.length == 0)
{
return;
}
// Lookup the pickable object (if any) for each unique color code appearing in the pick rectangle. Each picked
// object that corresponds to a picked color is added to the draw context.
foreach (int colorCode in colorCodes)
{
if (colorCode == 0) // This should never happen, but we check anyway.
{
continue;
}
PickedObject po = this.lookupPickableObject(colorCode);
if (po == null)
{
continue;
}
if (layer != null)
{
po.setParentLayer(layer);
}
dc.addObjectInPickRectangle(po);
}
}
/**
* Adds picked object registered with this PickSupport that are drawn at the specified pick point or intersect the
* draw context's pick rectangle to the draw context's list of picked objects. This clears any registered picked
* objects upon returning.
* <p/>
* If this pick point is <code>null</code>, this ignores the pick point and does not attempt to determine which
* picked objects are drawn there. If the draw context's pick rectangle is <code>null</code>, this ignores the pick
* rectangle and does not attempt to determine which picked objects intersect it. This does nothing if no picked
* objects are currently registered with this PickSupport.
*
* @param dc the draw context which receives the picked object.
* @param pickPoint the point in AWT screen coordinates.
* @param layer the layer associated with the picked object.
*
* @return the picked object added to the draw context, or <code>null</code> if no picked object is drawn at the
* specified point.
*/
public PickedObject resolvePick(DrawContext dc, Point pickPoint, Layer layer)
{
if (!this.hasPickableObjects()) // avoid reading the current GL color when no pickable objects are registered
{
return(null);
}
PickedObject po = null;
// Resolve the object at the pick point, if any, adding it to the draw context's list of objects at the pick
// point. If any object is at the pick point we return it. Note that the pick point can be null when the pick
// rectangle is specified but the pick point is not.
if (pickPoint != null)
{
po = this.doResolvePick(dc, pickPoint, layer);
}
// Resolve the objects in the pick rectangle, if any, adding them to the draw context's list of objects
// intersecting the pick rectangle. Note that the pick rectangle can be null when the pick point is specified
// but the pick rectangle is not.
if (dc.getPickRectangle() != null && !dc.getPickRectangle().isEmpty())
{
this.doResolvePick(dc, dc.getPickRectangle(), layer);
}
this.clearPickList();
return(po);
}
public override bool Equals(Object o)
{
if (this == o)
{
return(true);
}
if (o == null || GetType() != o.GetType())
{
return(false);
}
PickedObject that = (PickedObject)o;
if (colorCode != that.colorCode)
{
return(false);
}
if (isOnTop != that.isOnTop)
{
return(false);
}
//noinspection RedundantIfStatement
if (userObject != null ? !userObject.Equals(that.userObject) : that.userObject != null)
{
return(false);
}
return(true);
}
/**
* Adds a picked object registered with this PickSupport that is drawn at the specified point in AWT screen
* coordinates (if one exists) to the draw context's list of picked objects.
*
* @param dc the draw context which receives the picked object.
* @param pickPoint the point in AWT screen coordinates.
* @param layer the layer associated with the picked object.
*
* @return the picked object added to the draw context, or <code>null</code> if no picked object is drawn at the
* specified point.
*/
protected PickedObject doResolvePick(DrawContext dc, Point pickPoint, Layer layer)
{
PickedObject pickedObject = this.getTopObject(dc, pickPoint);
if (pickedObject != null)
{
if (layer != null)
{
pickedObject.setParentLayer(layer);
}
dc.addPickedObject(pickedObject);
}
return(pickedObject);
}
public PickedObject getTopObject(DrawContext dc, Point pickPoint)
{
if (!this.hasPickableObjects()) // avoid reading the current GL color when no pickable objects are registered
{
return(null);
}
int colorCode = this.getTopColor(dc, pickPoint);
if (colorCode == 0) // getTopColor returns 0 if the pick point selects the clear color.
{
return(null);
}
PickedObject pickedObject = this.lookupPickableObject(colorCode);
if (pickedObject == null)
{
return(null);
}
return(pickedObject);
}
protected PickedObject lookupPickableObject(int colorCode)
{
// Try looking up the color code in the pickable object map.
PickedObject po = this.getPickableObjects().get(colorCode);
if (po != null)
{
return(po);
}
// Try matching the color code to one of the pickable object ranges.
foreach (Map.Entry <Range, PickedObjectFactory> entry in this.getPickableObjectRanges().entrySet())
{
Range range = entry.getKey();
PickedObjectFactory factory = entry.getValue();
if (range.contains(colorCode) && factory != null)
{
return(factory.createPickedObject(colorCode));
}
}
return(null);
}
public void addPickableObject(PickedObject po)
{
this.getPickableObjects().put(po.getColorCode(), po);
this.adjustExtremeColorCodes(po.getColorCode());
}
/**
* Indicates whether two picked objects refer to the same user object.
*
* @param a the first picked object.
* @param b the second picked object.
*
* @return true if both objects are not null and they refer to the same user object, otherwise false.
*/
public static bool areSelectionsTheSame(PickedObject a, PickedObject b)
{
return(a != null && b != null && a.getObject() == b.getObject());
}
