Re: [Tutor] Why does using "window.addchr()" to place a character at the lower right corner raise an exception?
yes - usually that was the prompt for the terminal to insert a new line ... on some terminals this is a behaviour you can't control as it's implemented in hardware, so curses fakes things by moving the cursor back to where it "should" be afterward. If you try and to something when the cursor is at the extreme bottom right of the window/region and the terminal is hard-coded to do $magic immediately after, then your screen will be all messed up. -- Malcolm Herbert m...@mjch.net ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Why does using "window.addchr()" to place a character at the lower right corner raise an exception?
On Wed, Feb 27, 2019 at 8:09 PM Alex Kleider wrote: > > On 2019-02-27 17:48, boB Stepp wrote: > > Under https://docs.python.org/3/library/curses.html#window-objects in > > the curses docs, it states: > > > > > > window.addch(ch[, attr]) > > window.addch(y, x, ch[, attr]) > > [...] > > > > Note > > > > Writing outside the window, subwindow, or pad raises a curses.error. > > Attempting to write to the lower right corner of a window, subwindow, > > or pad will cause an exception to be raised after the character is > > printed. > > Could it be that as soon as the character is printed the cursor moves to > the 'next location' which is outside of the 'window, subwindow, or pad' > and it is this which causes the error to be raised? Alex, I think you have nailed it! Everything I have read so far indicates that an exception will be thrown whenever attempting to write outside of a window, subwindow or pad. So it would appear to follow that if for some reason I need to write something to that very last cell I will have to handle the exception generated. Thanks! -- boB ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Why does using "window.addchr()" to place a character at the lower right corner raise an exception?
On 2019-02-27 17:48, boB Stepp wrote: Under https://docs.python.org/3/library/curses.html#window-objects in the curses docs, it states: window.addch(ch[, attr]) window.addch(y, x, ch[, attr]) [...] Note Writing outside the window, subwindow, or pad raises a curses.error. Attempting to write to the lower right corner of a window, subwindow, or pad will cause an exception to be raised after the character is printed. Could it be that as soon as the character is printed the cursor moves to the 'next location' which is outside of the 'window, subwindow, or pad' and it is this which causes the error to be raised? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] Why does using "window.addchr()" to place a character at the lower right corner raise an exception?
Under https://docs.python.org/3/library/curses.html#window-objects in the curses docs, it states: window.addch(ch[, attr]) window.addch(y, x, ch[, attr]) [...] Note Writing outside the window, subwindow, or pad raises a curses.error. Attempting to write to the lower right corner of a window, subwindow, or pad will cause an exception to be raised after the character is printed. Why is this? What is special about the lower right corner of a terminal window? I am guessing this is some relic of the original terminal era. TIA! -- boB ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
