Centre checkmark in checkbox (#2036)

AUTHORS

@@ -18,4 +18,5 @@ Bruno Dupuis
 Christopher Noel Hesse
 Marcin Zając
 Laura Gallo
+Tim Murison
 Manmeet Singh

CHANGELOG.md

@@ -93,6 +93,7 @@ You can find its changes [documented below](#070---2021-01-01).
 
 ### Fixed
 
+- Centre checkmark in checkbox ([#2036] by [@agentsim])
 - `Notification`s will not be delivered to the widget that sends them ([#1640] by [@cmyr])
 - `TextBox` can handle standard keyboard shortcuts without needing menus ([#1660] by [@cmyr])
 - GTK Shell: Prevent mangling of newline characters in clipboard ([#1695] by [@ForLoveOfCats])
@@ -526,6 +527,7 @@ Last release without a changelog :(
 [@lisael]: https://github.com/lisael
 [@jenra-uwu]: https://github.com/jenra-uwu
 [@klemensn]: https://github.com/klemensn
+[@agentsim]: https://github.com/agentsim
 [@jplatte]: https://github.com/jplatte
 
 [#599]: https://github.com/linebender/druid/pull/599
@@ -806,6 +808,7 @@ Last release without a changelog :(
 [#1978]: https://github.com/linebender/druid/pull/1978
 [#1993]: https://github.com/linebender/druid/pull/1993
 [#1996]: https://github.com/linebender/druid/pull/1996
+[#2036]: https://github.com/linebender/druid/pull/2036
 [#2064]: https://github.com/linebender/druid/pull/2064
 
 [Unreleased]: https://github.com/linebender/druid/compare/v0.7.0...master

druid/src/widget/checkbox.rs

@@ -139,10 +139,12 @@ impl Widget<bool> for Checkbox {
 
         if *data {
             // Paint the checkmark
+            let x_offset = (rect.width() - 10.0) / 2.0;
+            let y_offset = (rect.height() - 8.0) / 2.0;
             let mut path = BezPath::new();
-            path.move_to((4.0, 9.0));
-            path.line_to((8.0, 13.0));
-            path.line_to((14.0, 5.0));
+            path.move_to((x_offset, y_offset + 4.0));
+            path.line_to((x_offset + 4.0, y_offset + 8.0));
+            path.line_to((x_offset + 10.0, y_offset));
 
             let style = StrokeStyle::new()
                 .line_cap(LineCap::Round)