[niepce/gtk4: 9/10] gtk4: set canvas widget expand

[Hubert Figuière <hub src gnome org>]

commit 2924d1221c177083aafe2679c4aa675c64623289
Author: Hubert Figuière <hub figuiere net>
Date:   Mon Mar 21 00:01:39 2022 -0400

    gtk4: set canvas widget expand

 src/niepce/modules/darkroom/darkroommodule.cpp | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/niepce/modules/darkroom/darkroommodule.cpp b/src/niepce/modules/darkroom/darkroommodule.cpp
index c31db1e..b881d98 100644
--- a/src/niepce/modules/darkroom/darkroommodule.cpp
+++ b/src/niepce/modules/darkroom/darkroommodule.cpp
@@ -106,6 +106,8 @@ Gtk::Widget * DarkroomModule::buildWidget()
     ncr::init();
     m_widget = &m_dr_splitview;
     m_imagecanvas = Gtk::manage(new ImageCanvas());
+    m_imagecanvas->set_hexpand(true);
+    m_imagecanvas->set_vexpand(true);
 // TODO set a proper canvas size
 //    m_canvas_scroll.add(*m_imagecanvas);
     m_vbox.append(*m_imagecanvas);