Missatge de David Gasa i Castell <dgasac...@gmail.com> del dia dv., 16
d’abr. 2021 a les 17:54:
> I'm recently migrated to Gtk+-4 & Gtkmm-4.0, dued mainly to the
> height-for-width trouble mentioned one week ago.
>
> The problem is that I don't see the way to verify that height-for-width
> feature is back again in a treeview cell rows.
>
> If so, I need help to find out the changes that should be implemented in
> the code attached below to see how the text fits above, in the same cell,
> when the column size is been reduced.
>
> ---- code -----
>
> #include <gtkmm.h>
> #include <map>
>
> class MyWindow
> :
> public Gtk::Window
> {
> public:
>
> MyWindow();
> virtual ~MyWindow();
>
> private:
>
> void fill_treeview();
>
> void wrap_col (Gtk::TreeViewColumn *, Gtk::CellRendererText *);
>
> std::map<gint, Glib::ustring> messages;
>
> // Gtkmm widgets
>
> Gtk::Box box;
>
> Gtk::TreeView treeview;
>
> Gtk::Separator separator;
> Gtk::Button button;
>
> class ModelColumns
> :
> public Gtk::TreeModel::ColumnRecord
> {
> public:
>
> ModelColumns()
> {
> add (id);
> add (message);
> }
>
> Gtk::TreeModelColumn<gint> id;
> Gtk::TreeModelColumn<Glib::ustring> message;
> }
> model_cols;
>
> Glib::RefPtr<Gtk::ListStore> refListStore;
>
> Gtk::TreeRow row;
> };
>
> MyWindow::MyWindow()
> :
> box (Gtk::Orientation::VERTICAL, 5),
> button ("Close"),
>
> messages ({
> {1, "Message: one"},
> {2, "Message: one two"},
> {3, "Message: one two three"},
> {4, "Message: one two three four"}
> }),
>
> refListStore (Gtk::ListStore::create (model_cols))
> {
> set_title ("MyWindow");
>
> treeview.set_model (refListStore);
>
> treeview.append_column ("Id.", model_cols.id);
>
> gint m_col =
> treeview.append_column ("Message", model_cols.message)-1;
>
> if (Gtk::TreeViewColumn * cl_message = treeview.get_column (m_col))
> {
> cl_message->connect_property_changed ("width",
> sigc::bind (sigc::mem_fun (*this, &MyWindow::wrap_col), cl_message,
> dynamic_cast<Gtk::CellRendererText *>(treeview.get_column_cell_renderer
> (m_col))));
> }
>
> treeview.set_vexpand();
> treeview.set_margin (10);
>
> button.set_margin (10);
>
> box.append (treeview);
> box.append (separator);
> box.append (button);
>
> button.signal_clicked().connect (sigc::mem_fun (*this,
> &Gtk::Widget::hide));
>
> set_child (box);
>
> fill_treeview();
> }
>
> void
> MyWindow::fill_treeview()
> {
> if (!refListStore->children().empty())
> refListStore->clear();
>
> for (auto & it : messages)
> {
> row = *(refListStore->append());
>
> row[model_cols.id] = it.first;
> row[model_cols.message] = it.second;
> }
> }
>
> void
> MyWindow::wrap_col (
> Gtk::TreeViewColumn * _column, Gtk::CellRendererText * _cell_renderer)
> {
> _cell_renderer->property_wrap_mode() = Pango::WrapMode::WORD;
>
> gint width = _column->get_width();
> _cell_renderer->property_wrap_width() = width;
> }
>
> MyWindow::~MyWindow()
> {
> }
>
> int main (int argc, char* argv[])
> {
> auto app = Gtk::Application::create ("org.gtkmm");
> return app->make_window_and_run<MyWindow>(argc, argv);
> }
>
> --
> David Gasa i Castell
>
> Linux User #488832
>
By these changes seems to be possible to reduce the column size and the
text breaks fine (word wrapping)...
if (Gtk::TreeViewColumn * cl_message = treeview.get_column (m_col))
{
cl_message->set_fixed_width (0);
cl_message->set_min_width (0);
cl_message->connect_property_changed ("width",
sigc::bind (sigc::mem_fun (*this, &MyWindow::wrap_col), cl_message,
dynamic_cast<Gtk::CellRendererText *>(treeview.get_column_cell_renderer
(m_col))));
}
But the rest of text line is hidden, getting something like,
=================
Id Messages
=================
1 Message: one
=================
2 Message: one
=================
3 Message: one
=================
4 Message: one
=================
How could I do to get as follows ?
=================
Id Messages
=================
1 Message: one
=================
2 Message: one
two
=================
3 Message: one
two three
=================
4 Message: one
two three four
=================
--
David Gasa i Castell
Linux User #488832
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