Thank you Emmanuele, I received similar feedback from another member of the list.
I will take a look at the suggested source code in GtkTextView and GtkEntry (I am unfamiliar, as I am not using the upper libraries in the GTK stack). A suggestion of a more suitable mailing list would be appreciated as well. I do not want to clutter an inappropriate group. On 1 September 2017 at 12:34, Emmanuele Bassi <eba...@gmail.com> wrote: > Or, more likely, you sent the email to the wrong list. You probably > want to talk to the developers of text editors based on GtkTextView > and Pango. > > Additionally, you may want to look at GtkTextView itself. > > Ciao, > Emmanuele. > > > On 1 September 2017 at 12:14, Jeffrey Sheen > <jeffrey.shee...@alumni.imperial.ac.uk> wrote: > > Dear list, > > > > As there has not been a response to my query about Unicode deletion-key > > interrupts, one of the following must be true: > > > > My question does not make sense, as I have made an incorrect assumption > > No-one on the list has written code for a text editor widget > > No-one wishes to share their experience writing code for a text editor > > widget > > > > The first reason is most likely, but I would appreciate a brief > explanation. > > > > Deletion-key interrupts are a fundamental use-case of creating an > > application with interactive text, so I think this is an important > talking > > point. > > > > Jeff. > > > > On 22 July 2017 at 12:45, Jeffrey Sheen > > <jeffrey.shee...@alumni.imperial.ac.uk> wrote: > >> > >> Dear list, > >> > >> I would like to leverage your experience with the Pango API. > >> > >> I am currently using "pango_layout_move_cursor_visually" to handle > >> arrow-key presses. This establishes the byte index that the cursor > should be > >> moved to, visually skipping whole grapheme clusters. > >> > >> However, I understand that there are more states are required when > >> handling the delete and backspace keys, depending on the text's > language. > >> > >> i.e. it is possible to press a deletion key, and the grapheme cluster be > >> altered, but not reduce the number of grapheme clusters in the string. > >> > >> Reading the Pango API documentation, this aspect appears to be > represented > >> with the "PangoLogAttr.backspace_deletes_character" member variable. > >> > >> However, unlike "pango_layout_move_cursor_visually", > "pango_get_log_attrs" > >> operates below the level of a PangoLayout object, requiring a > PangoLanguage* > >> to be passed. > >> > >> Must I manually store the language that a block of text is written in > and > >> convert this to a PangoLanguage object? > >> > >> What is the best practice when handling a delete/backspace key press? > >> > >> Cheers, > >> > >> Jeff. > > > > > > > > _______________________________________________ > > gtk-list mailing list > > gtk-list@gnome.org > > https://mail.gnome.org/mailman/listinfo/gtk-list > > > > > > -- > https://www.bassi.io > [@] ebassi [@gmail.com] >
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