On 03/26/2013 05:38 AM, Michael Herrmann wrote:
On Tuesday, March 26, 2013 12:40:45 AM UTC+1, Mitya Sirenef wrote:
>> ...
>>
>> I think I would prefer context managers. I don't think it's a big
>> problem for
>> win users because this behaviour would be one of the first things
documented
>> in the start guide and would be all over example scripts, so a new user
>> missing
>> or forgetting it is not a realistic scenario.
>>
>> The advantages are that it's explicit, blocks are indented and it's
>> impossible to
>> miss which window is the action applied to, and at the same time
actions are
>> short and easy to type and read.
>
> Thank you for your reply. What do you think of Chris Angelico's points?
At the __exit__, further commands are no longer routed to that window;
if it was a nested context, window is switched to the outer context,
WHEN there are commands in it (i.e. on the first command). This seems
pretty intuitive to me:
with notepad1:
^S
with notepad2:
^S
write('something')
> He wrote:
>> What happens at the __exit__ of the context manager? What happens if
>> context managers are nested? I'd be inclined to the simpler option of
>> an explicit switch (since focus doesn't really "stack" and it'd feel
>> weird for focus to *sometimes* switch away when you're done working
>> with one window), though the context manager syntax does have its
>> advantages too.
>
> What I am most afraid of: that the window that's currently the
context "disappears":
> notepad = start("Notepad")
> with notepad:
> press(ALT + TAB)
> write("Am I in Notepad now?")
Alt-tab needs to be handled by a wrapper function that gives you the
object of the window you've switched to:
otherwin = alt_tab()
with otherwin:
...
If window is changed within 'with' block, the rest of block should be
ignored. Perhaps there could also be a way to switch this behaviour off,
for the entire script or for current block only.
> What do you think of designs #3 and #4?
>
> notepad_1 = start("Notepad")
> notepad_2 = start("Notepad")
> switch_to(notepad_1)
> write("Hello World!")
> press(CTRL + 'a', CTRL + 'c')
> switch_to(notepad_2)
> press(CTRL + 'v')
>
> notepad_1 = start("Notepad")
> notepad_2 = start("Notepad")
> notepad_1.activate()
> write("Hello World!")
> press(CTRL + 'a', CTRL + 'c')
> notepad_2.activate()
> press(CTRL + 'v')
>
> I somehow prefer "activate" over "focus" as in my feeling, you'd
normally say that you focus *on* something, so it should be called
"focus_on" or "give_focus[_to]". Can you say, in everyday English, that
you "focus a window"? I'm not a native speaker so maybe my feeling is
misguided.
These are ok, too, but I feel it's much easier to send commands to a
wrong window vs. context managers. The same command in a different
window can have vastly different and dangerous effect. In other python
code that's generally not common at all, and would be bad style:
lst = lst1
lst.append('x')
del lst[3]
lst.insert(0, 'a')
lst = lst2
del lst[2]
lst.append('y')
lst = lst3
lst.insert(0, 'x')
lst += [1,2]
I think current window should also be acquired explicitly:
with get_current_window():
type("some kind of snippet")
For usage when a command should apply to all types of windows.
HTH, -m
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