Adding basic keyboard input

src/Engine/System/KeyboardInput.cpp

@@ -0,0 +1,51 @@
+#include "KeyboardInput.h"
+
+using namespace Seele;
+using namespace Seele::System;
+
+KeyboardInput::KeyboardInput(PScene scene)
+    : ComponentSystem<Component::KeyboardInput>(scene)
+{
+}
+
+KeyboardInput::~KeyboardInput()
+{
+}
+
+void KeyboardInput::update(Component::KeyboardInput& input)
+{
+    std::memcpy(input.keys.data(), keys.data(), sizeof(keys));
+    input.deltaX = deltaX;
+    input.deltaY = deltaY;
+    input.mouseX = mouseX;
+    input.mouseY = mouseY;
+    input.mouse1 = mouse1;
+    input.mouse2 = mouse2;
+}
+
+void KeyboardInput::keyCallback(KeyCode code, InputAction action, KeyModifier modifier)
+{
+    keys[code] = action != InputAction::RELEASE;
+}
+
+void KeyboardInput::mouseCallback(double x, double y)
+{
+    mouseX = x;
+    mouseY = y;
+    deltaX = x - lastMouseX;
+    deltaY = y - lastMouseY;
+    lastMouseX = x;
+    lastMouseY = y;
+}
+
+void KeyboardInput::mouseButtonCallback(MouseButton button, InputAction action, KeyModifier modifier)
+{
+    if (button == MouseButton::MOUSE_BUTTON_1)
+    {
+        mouse1 = action != InputAction::RELEASE;
+    }
+    if (button == MouseButton::MOUSE_BUTTON_2)
+    {
+        mouse2 = action != InputAction::RELEASE;
+    }
+}