[gnome-usage] better-box: Rewrite BetterBox from C to Vala

[Petr Štětka <pstetka src gnome org>]

commit 68ef94a115dca33d3ce784c5e9378cc54590cd0a
Author: Petr Štětka <pstetka redhat com>
Date:   Wed May 3 14:28:16 2017 +0200

    better-box: Rewrite BetterBox from C to Vala
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781607#c22

 src/better-box.vala |   23 +++++++++++++++++++++++
 src/meson.build     |    1 +
 2 files changed, 24 insertions(+), 0 deletions(-)
---
diff --git a/src/better-box.vala b/src/better-box.vala
new file mode 100644
index 0000000..aa027b8
--- /dev/null
+++ b/src/better-box.vala
@@ -0,0 +1,23 @@
+namespace Usage {
+
+    public class BetterBox : Gtk.Box
+    {
+        public int max_width_request { get; set;  default = -1; }
+
+        private new void get_preferred_width(out int minimum_width, out int natural_width)
+        {
+            int min_width;
+            int nat_width;
+            get_preferred_width(out min_width, out nat_width);
+
+            if (max_width_request > 0)
+            {
+                if (min_width > max_width_request)
+                    min_width = max_width_request;
+
+                if (nat_width > max_width_request)
+                    nat_width = max_width_request;
+            }
+        }
+    }
+}
diff --git a/src/meson.build b/src/meson.build
index 55396ab..80d9c5c 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,5 +1,6 @@
 vala_sources = [
     'application.vala',
+    'better-box.vala',
     'color-rectangle.vala',
     'cpu-graph-table.vala',
     'cpu-graph.vala',