Add input GamepadButtonDown and GamepadButtonUp events

#3626

Source/Engine/Input/Input.cpp

@@ -80,6 +80,8 @@ Delegate<const Float2&, MouseButton> Input::MouseDoubleClick;
 Delegate<const Float2&, float> Input::MouseWheel;
 Delegate<const Float2&> Input::MouseMove;
 Action Input::MouseLeave;
+Delegate<InputGamepadIndex, GamepadButton> Input::GamepadButtonDown;
+Delegate<InputGamepadIndex, GamepadButton> Input::GamepadButtonUp;
 Delegate<const Float2&, int32> Input::TouchDown;
 Delegate<const Float2&, int32> Input::TouchMove;
 Delegate<const Float2&, int32> Input::TouchUp;
@@ -1027,6 +1029,19 @@ void InputService::Update()
             break;
         }
     }
+    // TODO: route gamepad button events into global InputEvents queue to improve processing
+    for (int32 i = 0; i < Input::Gamepads.Count(); i++)
+    {
+        auto gamepad = Input::Gamepads[i];
+        for (int32 buttonIdx = 1; buttonIdx < (int32)GamepadButton::MAX; buttonIdx++)
+        {
+            GamepadButton button = (GamepadButton)buttonIdx;
+            if (gamepad->GetButtonDown(button))
+                Input::GamepadButtonDown((InputGamepadIndex)i, button);
+            else if (gamepad->GetButtonUp(button))
+                Input::GamepadButtonUp((InputGamepadIndex)i, button);
+        }
+    }
 
     // Update all actions
     for (int32 i = 0; i < Input::ActionMappings.Count(); i++)

Source/Engine/Input/Input.h

@@ -113,6 +113,16 @@ public:
     /// </summary>
     API_EVENT() static Action MouseLeave;
 
+    /// <summary>
+    /// Event fired when gamepad button goes down.
+    /// </summary>
+    API_EVENT() static Delegate<InputGamepadIndex, GamepadButton> GamepadButtonDown;
+
+    /// <summary>
+    /// Event fired when gamepad button goes up.
+    /// </summary>
+    API_EVENT() static Delegate<InputGamepadIndex, GamepadButton> GamepadButtonUp;
+
     /// <summary>
     /// Event fired when touch action begins.
     /// </summary>