[Rails-devel] President's help in train buying

[Erik V. <eri...@hc...>]

I seem to have managed to implement emergency train buying.

The president can now add cash in those cases where the 1830
rules allow that (including extra cash up to list price if
a train is bought from another company).
If the president must sell shares, a short "ShareSellingRound" 
is thrown in (a subclass of StockRound).

To make this happen, the ORPanel/OperatingRound interface has changed,
and most of the old decision logic has been moved from ORPanel
to OperatingRound, where it belongs. The model now decides which
trains are for sale, and what special actions are allowed or even
required (such as adding cash). A new class BuyableTrain holds
this info, and the model returns a List of BuyableTrain objects
to the view. This list only includes trains that the company actually 
can buy in one way or another. If there is insufficient cash, only
the cheapest train in the bank can be bought (or any company train).
The view (GUI) returns the actually chosen BuyableTrain to the model, 
for further processing. 

It all seems to work (I tested this with a fictituous 1830 game
without privates, where companies float at 20% and where the smallest
trains are 6-trains).

Bankruptcy is not yet detected, that will be the last thing,
together with the long-awaited end-of-game report.

In addition I have added coordinates to the stock chart (an old wish of
mine).
This was far less easy than it looks, mostly because, despite all
documentation, JLabel preferred and minimum sizes do not seem to be
honoured by BoxLayout. I guess I did something wrong, but I can't figure out
what. 
The current coordinate display is not perfect, but should be good enough.

Erik.