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update debugger documentation

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svn: r9556
This commit is contained in:
Greg Cooper 2008-05-01 03:15:53 +00:00
parent a126f13089
commit 98cfe9cf42
2 changed files with 13 additions and 10 deletions
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collects/scribblings/drscheme/debugger1.png
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23
collects/scribblings/drscheme/interface-essentials.scrbl
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@ -557,15 +557,6 @@ the @onscreen{Over} button, it sets a one-time breakpoint and
continues execution. In this case, the program stops upon returning
to the context or raising an unhandled exception.}
@item{The @as-index{@onscreen{Up} button} is only enabled when
execution is paused within the context of another expression. It
switches the debugger's view to the outer context.}
@item{The @as-index{@onscreen{Down} button} is only enabled when
execution is paused and the @onscreen{Up} button has been clicked at
least once, so the debugger's view is not at the lowest-level
expression. It moves the view context inward one level.}
}
If the program is running (not paused), then only the @as-index{Pause}
@ -630,12 +621,24 @@ enter a new value for the variable.}
}
@subsection{Stack View Pane}
In addition, while execution is paused, the stack view pane at the
right of the DrScheme frame is active. The top of the pane shows a
list of active stack frames. Mousing over a frame produces a faint
green highlighting of the corresponding expression. Clicking on the
frame selects that frame, which makes its lexical variables visible.
The selected frame is indicated by a bold font.
The bottom of the pane shows the lexical variables in the selected
stack frame.
The following screenshot illustrates several aspects of the debugger
interface. The red circle before the @scheme[if] is a breakpoint,
and the green triangle at the end of the @scheme[(fact (sub1 n))] is where
execution is currently paused. The expression's return value is
displayed at the left of the button bar, and the value of @scheme[n]
is at the right.
is displayed in the stack view pane.
@image["debugger1.png"]