Many thanks! It seems that the following call was the key to my problem: m_TextView.set_expand(); This call seems very non-intuitive to me; I would have expected the TextView to automatically expand based on the contents of the TextBuffer.
Or, to ask the question another way: Why does the TextView display correctly when it is added as a child of the window but not when it is placed in a Grid? On Thu, Oct 6, 2022 at 9:42 AM Kjell Ahlstedt <kjellahlst...@gmail.com> wrote: > set_child(m_grid); shows that this is gtkmm4. > > I made some tests with the TextView example in gtkmm-documentation, > > > https://gitlab.gnome.org/GNOME/gtkmm-documentation/-/tree/master/examples/book/textview > > 1. Replaced Gtk::Box m_VBox; by Gtk::Grid m_grid; The TextView is a child > of a ScrolledWindow, which is a child of the Grid, which is the child of > the window. > The text in the TextView was shown. > > 2. Removed the ScrolledWindow. > The TextView was not shown. Or, rather, it was minimized. > > 3. Added m_TextView.set_expand(); > The TextView was shown again. > Den 2022-10-06 kl. 13:00, skrev Rodolfo Ribeiro Gomes: > > If you are gtkmm3, widgets are hidden by default. > You should call Gtk::Container::show_all_children() or > Gtk::Widget::show_all(). > > AFAIK, in gtkmm4 this isn't necessary anymore, as widgets are (finally) > visible by default. > > Em qui., 6 de out. de 2022 às 07:33, Bill Greene via gtkmm-list < > gtkmm-list@gnome.org> escreveu: > >> Thanks for taking a look at this. >> >> Unfortunately, even after I make the TextView a class member, I still >> don't see the text displayed in the window. >> A concise description of the problem is this: >> If I make the TextView a child of the window, the text is displayed. If I >> make the TextView a child of a Grid, and the >> Grid a child of the window, the text is not displayed. >> >> I am assuming there might be some property of the Grid I need to set? >> >> On Wed, Oct 5, 2022 at 12:40 PM Kjell Ahlstedt <kjellahlst...@gmail.com> >> wrote: >> >>> You have declared the TextView as a local variable in the constructor. >>> It will be deleted when the constructor finishes. You must either >>> declared it in your window class, like the buttons in >>> >>> >>> https://gitlab.gnome.org/GNOME/gtkmm-documentation/-/blob/master/examples/book/grid/examplewindow.h >>> >>> or create it with Gtk::make_managed() in the constructor, like the >>> button in >>> >>> >>> https://gitlab.gnome.org/GNOME/gtkmm-documentation/-/blob/master/examples/book/scrolledwindow/examplewindow.cc >>> >>> Den 2022-10-05 kl. 17:00, skrev Bill Greene via gtkmm-list: >>> > I am trying to add a TextView instance to a Grid. But when I display >>> > the window, it is >>> > empty. The Grid examples I have seen add buttons to the grid and these >>> > work fine >>> > for me. But I don't understand the difference between adding a button >>> > and adding >>> > a TextView. If anyone can help me with this, I would appreciate it. >>> > >>> > Here is my sample code (part of the constructor for my window): >>> > >>> > set_child(m_grid); >>> > Gtk::TextView tc; >>> > Glib::RefPtr<Gtk::TextBuffer> tb = Gtk::TextBuffer::create(); >>> > std::string msg("cell 1,1"); >>> > auto it = tb->insert(tb->begin(), msg); >>> > tc.set_buffer(tb); >>> > m_grid.attach(tc, 0, 0); >>> > m_grid.set_visible(); >>> > >>> >> >>
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