Hi Everybody,
I submitted the patch to bugs.python.org under ID 2704. "IDLE: Patch to
make PyShell behave more like a Terminal interface". Hopefully I can
justify why these changed are needed.
This patch tries to make the PyShell behavior approach Terminal-like
behavior in two ways, but still preserving some old behavior.
Firstly, if the cursor is after the "iomark", then PyShell will behave
like an expected terminal, where up/down scrolls through the command
history. However, if the cursor should leave the command line area, then
it will behave as it does now.
The cursor can leave the command line area by pressing Pg-Up, or
Pg-Down, clicking somewhere else in the window, or by pressing
Left-Arrow" at the start of the command line. This is different from
rebinding the keys using the Options->Configure Idle->Keys because if
the cursor is anywhere on the window, pressing up or down will place the
cursor back at the command line. That rebinding "breaks" the ability to
use the arrow keys to find a line in the PyShell window and press enter
to copy it.
Secondly, if the PyShell window has focus, then keyboard letter/number
input should be sent to the command line. The ModifiedUndoDelegator
ignores keys when the cursor is before the iomark. Instead it should
place the cursor at the end of the command line and insert the key press
there. This is expected of a terminal. Too often I find myself switching
between Editor windows and the PyShell window with the mouse, and unless
I bring focus to PyShell by clicking the title bar or the command line
area, the cursor moves somewhere else in the window and PyShell ignores me.
I hope that this wasn't too much information. I really want to help make
IDLE a more powerful Python editor, but still keep it simple.
Best,
RDS
Tal Einat wrote:
Roger Serwy wrote:
Hi Everybody,
I wrote a patch to make PyShell's input behave more like a "shell window",
where up/down key strokes go through the command history and all text input
is sent to the current command line. Who should I send this to?
Hi Roger, welcome to the IDLE mailing list!
The first thing is to with a patch is to discuss it with this list :)
Changing IDLE's interface so that the arrow keys scroll through the
history can be done in the configuration dialog: Options -> Configure
IDLE ... -> Keys. However, moving the cursor around the window is very
useful and much more intuitive for novice programmers, so we want this
to be the default behavior. FYI, if the cursor is on a line/block of
previously run code, pressing Enter will copy/paste the code into the
current command line, and pressing Enter once more will run it again
as-is.
As for the change that all text input be redirected to the current
command line - where in the command line? Always the end? Explaining
what kind of behavior you want, and why, before sending a patch could
save some work for all of us.
In any case, if/when you want to submit a patch, you can submit the
patch to the CPython issue tracker at bugs.python.org. Just register a
user there (if you don't have one), then select "New Issue" under
"Issues" in the navigation bar. Give the issue an informative name,
something with "IDLE" in it which describes your patch's purpose, and
please also select IDLE in the Components box. You can then also write
to this mailing list if you want some people to try it out and discuss
it.
- Tal
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