Hi again, For sure you should probably use:
g_signal_connect_after(your_text_buffer, "changed", G_CALLBACK(your_text_buffer_changed_callback), your_data); and YOUR_DATA(your_data) just casts to your pointer to a struct or object containing some information: struct _YourData{ gint last_newline_position; }; Well this is it. Bests, Joël On Wed, Sep 26, 2018 at 7:12 AM Joël Krähemann <jkraehem...@gmail.com> wrote: > > Hi, > > g_object_get(your_text_view, > "buffer", &your_text_buffer, > NULL); > g_signal_connect(your_text_buffer, "changed", > G_CALLBACK(your_text_buffer_changed_callback), your_data); > > void your_text_buffer_changed_callback(GtkTextBuffer > *your_text_buffer, gpointer your_data) > { > gint line_count; > > line_count = gtk_text_buffer_get_line_count(your_text_buffer); > > if(line_count > YOUR_DATA(your_data)->line_count){ > gchar *your_text; > > g_object_get(your_text_buffer, > "text", &your_text, > NULL); > > if(your_text[strlen(your_text) - 1] == '\n' && > YOUR_DATA(your_data)->last_newline_position < > &(your_text[strlen(your_text) - 1]) - your_text){ > //TODO:DMC: implement me > } > } > } > > by, > Joël > > On Wed, Sep 26, 2018 at 6:49 AM Doug McCasland <do...@bravoecho.net> wrote: > > > > Eric, thanks for the ideas! > > > > I tried a bunch of things to distinguish the callbacks, but it got too > > complicated. Checking for a different line number is a clever idea, but > > PgUp and PgDown also move the cursor which changes the line number. > > Similar problems for tracking the char offset in the line (for simply > > typing at the end of the last visible line, not creating a new line/para). > > > > So, it would be nice if there was a simple signal for this case, where the > > window scrolls because of keyboard input in the last visible line. > > > > The reason I want this is, is so my app can scroll the window > > automatically, so that the cursor insert point becomes centered > > vertically. In other words, when I'm typing a long paragraph, and it's the > > last visible line, I want it to scroll up, so I'm now typing in the middle > > of the window (vs. continuing to type on the last visible line). > > > > I suppose this is a bit esoteric. > > > > I did create a kbd shortcut to do that scroll manually: > > > > gtk_text_view_scroll_to_iter(..., 0.0, TRUE, 1.0, 0.5) > > > > so I have that to use. > > > > > > On Tue, Sep 25, 2018 at 2:34 PM <cecas...@aol.com> wrote: > > > > > > > > Not sure how to go about this myself. I see the extra callbacks and it > > > would be a good thing to limit them. For filtering maybe check if the > > > cursor has changed lines along with the adjustment value change. Suspect > > > there is a better solution for this. > > > > > > static void value_changed(GtkAdjustment *v_adjust, gpointer textview) > > > { > > > static gint s_line=0; > > > GtkTextIter iter; > > > GtkTextBuffer > > > *buffer=gtk_text_view_get_buffer(GTK_TEXT_VIEW(textview)); > > > GtkTextMark *mark=gtk_text_buffer_get_mark(buffer, "insert"); > > > gtk_text_buffer_get_iter_at_mark(buffer, &iter, mark); > > > gint line=gtk_text_iter_get_line(&iter); > > > if(s_line!=line) > > > { > > > g_print("Scroll Line\n"); > > > s_line=line; > > > } > > > } > > > > > > Eric > > > > > > > > > -----Original Message----- > > > From: Doug McCasland <do...@bravoecho.net> > > > To: cecashon <cecas...@aol.com> > > > Sent: Tue, Sep 25, 2018 2:10 pm > > > Subject: Re: is there a signal for typing at bottom of window? > > > > > > Actually I get 11 signals with a different setting of: > > > gtk_text_view_set_pixels_inside_wrap() > > > > > > So it's one signal per vertical pixel perhaps? I can code for that. > > > > > > But I also I get those signals during any scrolling (scrollbar or > > > mousewheel). How can I distinguish between automatic scrolling at bottom > > > and user-commanded scrolling? > > > > > > thanks > > > > > > > > > > > > > > > > > > On Tue, Sep 25, 2018 at 1:47 PM Doug McCasland <do...@bravoecho.net> > > > wrote: > > > > > > Woo-hoo, that works! > > > > > > BUT, I get 12 signals for each line that is auto-scrolled. I can code for > > > this, but why 12? Will it always be 12? > > > > > > > > > On Tue, Sep 25, 2018 at 11:46 AM <cecas...@aol.com> wrote: > > > > > > > > > Hi Doug, > > > > > > Try getting the vertical adjustment of the scrolled window and connect to > > > "value-changed". See if that will work. Something like > > > > > > ... > > > static void value_changed(GtkAdjustment *v_adjust, gpointer user_data) > > > { > > > } > > > ... > > > GtkWidget *scroll=gtk_scrolled_window_new(NULL, NULL); > > > GtkAdjustment > > > *v_adjust=gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(scroll)); > > > g_signal_connect(v_adjust, "value-changed", G_CALLBACK(value_changed), > > > NULL); > > > ... > > > > > > Eric > > > > > > > > > > > > > > > > > > -- > > > Doug McCasland <do...@bravoecho.net> > > > > > > > > > > > > -- > > > Doug McCasland <do...@bravoecho.net> > > > > > > > > > -- > > Doug McCasland <do...@bravoecho.net> > > _______________________________________________ > > gtk-app-devel-list mailing list > > gtk-app-devel-list@gnome.org > > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list