added basic gesture system on Android

engine/event.h

@@ -21,6 +21,7 @@ enum class kEventCategory : uint8_t
     MouseEvent,
     KeyEvent,
     ButtonEvent,
+    GestureEvent,
 };
 
 enum class kEventType : uint8_t
@@ -33,6 +34,10 @@ enum class kEventType : uint8_t
     MouseEnter,
     MouseLeave,
     MouseScroll,
+    MouseCancel,
+    GestureStart,
+    GestureMove,
+    GestureEnd,
     KeyDown,
     KeyUp,
     KeyChar,
@@ -62,3 +67,15 @@ public:
     kKey m_key;
     char m_char;
 };
+
+class GestureEvent : public Event
+{
+public:
+    GestureEvent() { m_cat = kEventCategory::GestureEvent; }
+    float m_distance;
+    float m_distance_delta;
+    float m_angle;
+    float m_angle_delta;
+    glm::vec2 m_pos;
+    glm::vec2 m_pos_delta;
+};