Merge Rust-SDL2#711: Change HatState::Leftdown into HatState::LeftDown

* Fix HatState::Leftdown casing into HatState::LeftDown
* Fixed example
* Added an entry to the changelog

changelog.md

@@ -3,6 +3,10 @@ when upgrading from a version of rust-sdl2 to another.
 
 ### v0.31
 
+[PR #711](https://github.com/Rust-SDL2/rust-sdl2/pull/711)
+
+* **Breaking change** Change HatState::Leftdown casing into HatState::LeftDown to be consistent with naming.
+
 [PR #673](https://github.com/Rust-sdl2/rust-sdl2/pull/673)
 
 * Support Audio Capture in AudioCallbacks.
@@ -11,7 +15,7 @@ when upgrading from a version of rust-sdl2 to another.
 
 * **Breaking change** Make get\_swap\_interval return an enum instead of i32
 * The signature of set\_swap\_interval has been changed as well, but it shouldn't
-breaking exisitng code too much.
+breaking existing code too much.
 
 [PR #683](https://github.com/Rust-sdl2/rust-sdl2/pull/684)
 

src/sdl2/joystick.rs

@@ -376,7 +376,7 @@ pub enum HatState {
     RightUp   = 0x02 | 0x01,
     RightDown = 0x02 | 0x04,
     LeftUp    = 0x08 | 0x01,
-    Leftdown  = 0x08 | 0x04,
+    LeftDown  = 0x08 | 0x04,
 }
 
 impl HatState {
@@ -390,7 +390,7 @@ impl HatState {
             3  => HatState::RightUp,
             6  => HatState::RightDown,
             9  => HatState::LeftUp,
-            12 => HatState::Leftdown,
+            12 => HatState::LeftDown,
             _  => panic!("Unexpected hat position: {}", raw),
         }
     }
@@ -405,7 +405,7 @@ impl HatState {
             HatState::RightUp => 3,
             HatState::RightDown => 6,
             HatState::LeftUp => 9,
-            HatState::Leftdown => 12,
+            HatState::LeftDown => 12,
         }
 
     }