Re: Control what happens when GtkTextView is resized: keep the bottom part visible

[Eduardo M KALINOWSKI <eduardo kalinowski com br>]

Eduardo M KALINOWSKI wrote:
> I have a question concerning how to set which part of a GtkTextBuffer is
> displayed when a GtkTextView is resized.
>
> To explain the situation, consider this sample code:
>
> ----8<----
> /* gcc -o tvtest tvtest.c `pkg-config --libs --cflags gtk+-2.0` */
> #include <gtk/gtk.h>
>
> int main(int argc, char *argv[])
> {
>   GtkWidget     *window;
>   GtkWidget     *vpaned;
>   GtkWidget     *text1;
>   GtkWidget     *scr1;
>   GtkTextBuffer *buffer;
>   GtkWidget     *text2;
>   GtkWidget     *scr2;
>
>   gtk_init(&argc, &argv);
>
>   window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
>   gtk_widget_set_size_request(window, 500, 300);
>   g_signal_connect(G_OBJECT(window), "delete-event",
>                    G_CALLBACK(gtk_main_quit), NULL);
>
>   vpaned = gtk_vpaned_new();
>
>   text1 = gtk_text_view_new();
>   buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text1));
>   gtk_text_buffer_set_text(buffer,
>                            "Lorem ipsum dolor sit amet,\n"
>                            "consectetur adipisicing elit,\n"
>                            "sed do eiusmod tempor incididunt\n"
>                            "ut labore et dolore magna aliqua.\n"
>                            "Ut enim ad minim veniam,\n"
>                            "quis nostrud exercitation ullamco laboris\n"
>                            "nisi ut aliquip ex ea commodo consequat.\n"
>                            "Duis aute irure dolor in reprehenderit\n"
>                            "in voluptate velit esse cillum dolore\n"
>                            "eu fugiat nulla pariatur.\n"
>                            "Excepteur sint occaecat cupidatat non
> proident,\n"
>                            "sunt in culpa qui officia\n"
>                            "deserunt mollit anim id est laborum.", -1);
>
>   text2 = gtk_text_view_new_with_buffer(buffer);
>
>   scr1 = gtk_scrolled_window_new(NULL, NULL);
>   gtk_container_add(GTK_CONTAINER(scr1), text1);
>   gtk_paned_add1(GTK_PANED(vpaned), scr1);
>
>   scr2 = gtk_scrolled_window_new(NULL, NULL);
>   gtk_container_add(GTK_CONTAINER(scr2), text2);
>   gtk_paned_add2(GTK_PANED(vpaned), scr2);
>
>   gtk_container_add(GTK_CONTAINER(window), vpaned);
>
>   gtk_widget_show_all(window);
>   gtk_main();
>
>   return 0;
> }
> ----8<----
>
> When the division in the GtkPaned is moved, what happens is that the top
> of the GtkTextViews remains the same (thus keeps displaying the same
> thing), while the bottom part shrinks, hiding some text at the bottom if
> the widget gets smaller, or displaying more text at the bottom if it is
> enlarged.
>
> What I would like to do is the opposite: for the GtkTextView in the
> bottom, I'd like that the bottom of the widget remains the same, but
> changes in size are reflected at the top: if the widget shrinks, then
> less text at the top should be displayed, if it grows, then more text at
> the top should be displayed. The bottom should remain fixed displaying
> always the same part.
>
> Another way to visualize is that by changing the division in the
> GtkPaned it should cover more of the top of the bottom GtkTextView,
> instead of pushing it down.
>
>   

Sorry to be posting again, but does anyone have any tips?


-- 
Eduardo M KALINOWSKI
eduardo kalinowski com br