Adding a larger screen clip.
[image: Screen Shot 2019-03-12 at 5.40.52 PM.png] On Tuesday, March 12, 2019 at 5:48:59 PM UTC-4, Velusamy Velu wrote: > > Friends: > > I'm developing a Chemical drawing tool and have been progressing steadily > with a lot of difficulties. My technology stack is Java 8, GWT 2.8.2, GMD > 2.x, Eclipse Photon, running on a MacBook Pro, and Chrome | Firefox | Opera > for testing. A limited functioning pilot is running at > http://peruselab.com. > > I just ran into a trouble that I couldn't figure out on my own. Below are > the relevant snippets of code that's causing trouble. The call (1) > ActionHandlerMap.getHandler(action) is expected to return an instance of > PeruseEventHandler. I expect the sequence of execution to be 1, 2, & 3. > However, upon returning from 2 (verified with the debugger) I see the > control going to 4 (screen clip 1) followed by throwing an exception > (screen clip 2). Any idea what could be wrong? Your help will be greatly > appreciated. > > ... > > PeruseEventHandler eventHandler = ActionHandlerMap.*getHandler*(action); > // 1 > Globals.*currentShape* = eventHandler.handle(*null*, *null*); // 3 > ... > > *public* *class* ActionHandlerMap { > > *public* *static* *final* Map<Action, PeruseEventHandler> > *ACTION_HANDLER_MAP* = *new* HashMap<>(); > > > *static* { > > *ACTION_HANDLER_MAP*.put(Action.*DRAW_SINGLE_BOND*, *new* > SingleBondDrawingHandler()); > > } > > > *public* *static* PeruseEventHandler getHandler(Action anAction) { > > *return* *ACTION_HANDLER_MAP*.get(anAction); // 2 > > } > > } > > > *public* *class* Globals { > > *public* *static* Action *action*; > > *public* *static* Shape *currentShape*; // 4 > > } > Enter code here... > > > [image: Screen Shot 2019-03-12 at 5.36.35 PM.png] > > Screen clip 1 > > > > [image: Screen Shot 2019-03-12 at 5.40.52 PM.png] > > > > -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.
