#184 more subtle breakpoint indication
The current development verison of DrJava shows debugger
breakpoints by overlaying a bright red band on top of the
source code line. This is visually distracting when one is
looking at the code.
Instead of the bright highlight band, it'd be nice to put a
small stop-sign icon in the left margin next to the line
where the breakpoint has been set. This has been used in
many IDEs over the years and works well. In IDEs that do
this, a narrow, empty scroll bar usually appears at the left
edge of the source editing window when debugging is
available, and breakpoints are toggled on and off by clicking
in that bar next to the line of source code. Not only does
this provide a place to put the stop sign icons, but it also
provides a nice visual clue about whether debugging is
enabled or not.
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I agree with this request-- the current highlighting is a
bit blatant.
I'm uncertain if a similar change should be made for the
"current line" (light blue) highlight, since that should
arguably be less subtle, and it doesn't seem quite as
visually distracting.
Implementation notes: be aware of the line number
enumeration "ruler" which is off by default. This feature
should either be combined with that or should at least not
interfere if both are on.