protected ConnectionFigure createConnection() {
try {
Class cLayer = Class.forName(objType);
LayerConnection lc = (LayerConnection) cLayer.newInstance();
lc.setParams(params);
// Each component is provided with a pointer to the parent NeuralNet object
NeuralNetDrawing nnd = (NeuralNetDrawing) view.drawing();
lc.setParam("NeuralNet", nnd.getNeuralNet());
return lc;
} catch (ClassNotFoundException cnfe) {
log.warn(
"ClassNotFoundException exception thrown while ConnectionFigure. Message is : "
+ cnfe.getMessage(),
cnfe);
} catch (InstantiationException ie) {
log.warn(
"InstantiationException exception thrown while ConnectionFigure. Message is : "
+ ie.getMessage(),
ie);
} catch (IllegalAccessException iae) {
log.warn(
"IllegalAccessException exception thrown while ConnectionFigure. Message is : "
+ iae.getMessage(),
iae);
}
return null;
}
/**
* Connects the figure to the new target. If there is no new target the connection reverts to its
* original one.
*/
public void invokeEnd(int x, int y, int anchorX, int anchorY, DrawingView view) {
Connector target = findConnectionTarget(x, y, view.drawing());
if (target == null) {
target = fOriginalTarget;
}
setPoint(x, y);
connect(target);
getConnection().updateConnection();
Connector oldConnector =
((ChangeConnectionHandle.UndoActivity) getUndoActivity()).getOldConnector();
// there has been no change so there is nothing to undo
if ((oldConnector == null)
|| (target() == null)
|| (oldConnector.owner() == target().owner())) {
setUndoActivity(null);
} else {
getUndoActivity().setAffectedFigures(new SingleFigureEnumerator(getConnection()));
}
if (getTargetFigure() != null) {
getTargetFigure().connectorVisibility(false);
setTargetFigure(null);
}
}
/** Connects the figures if the mouse is released over another figure. */
public void invokeEnd(int x, int y, int anchorX, int anchorY, DrawingView view) {
Connector target = findConnectionTarget(x, y, view.drawing());
if (target != null) {
getConnection().connectStart(startConnector());
getConnection().connectEnd(target);
getConnection().updateConnection();
} else {
view.drawing().remove(getConnection());
setUndoActivity(null);
}
setConnection(null);
if (getTargetFigure() != null) {
getTargetFigure().connectorVisibility(false, null);
setTargetFigure(null);
}
}
/** Finds a new target of the connection. */
public void invokeStep(int x, int y, int anchorX, int anchorY, DrawingView view) {
Point p = new Point(x, y);
Figure f = findConnectableFigure(x, y, view.drawing());
// track the figure containing the mouse
if (f != getTargetFigure()) {
if (getTargetFigure() != null) {
getTargetFigure().connectorVisibility(false);
}
setTargetFigure(f);
if (getTargetFigure() != null) {
getTargetFigure().connectorVisibility(true);
}
}
Connector target = findConnectionTarget(p.x, p.y, view.drawing());
if (target != null) {
p = Geom.center(target.displayBox());
}
setPoint(p.x, p.y);
}
/** Creates the connection */
public void invokeStart(int x, int y, DrawingView view) {
setConnection(createConnection());
setUndoActivity(createUndoActivity(view));
Vector v = new Vector();
v.add(getConnection());
getUndoActivity().setAffectedFigures(new FigureEnumerator(v));
Point p = locate();
getConnection().startPoint(p.x, p.y);
getConnection().endPoint(p.x, p.y);
view.drawing().add(getConnection());
}
/**
* Tracks the end of the interaction.
*
* @param x the current x position
* @param y the current y position
* @param anchorX the x position where the interaction started
* @param anchorY the y position where the interaction started
*/
public void invokeEnd(int x, int y, int anchorX, int anchorY, DrawingView view) {
invokeEnd(x - anchorX, y - anchorY, view.drawing());
}
/**
* @param x the x position where the interaction started
* @param y the y position where the interaction started
* @param view the handles container
*/
public void invokeStart(int x, int y, DrawingView view) {
invokeStart(x, y, view.drawing());
}
/** Deletes the selection from the drawing. */
protected void deleteSelection() {
fView.drawing().removeAll(fView.selection());
fView.clearSelection();
}
/**
* Creates the drawing view used in this application. You need to override this method to use a
* DrawingView subclass in your application. By default a standard DrawingView is returned.
*/
protected DrawingView createDrawingView() {
DrawingView createdDrawingView = createDrawingView(createDrawing());
createdDrawingView.drawing().setTitle(getDefaultDrawingTitle());
return createdDrawingView;
}
