为组件增加了focusStatus属性，增加了FocusManager类

components/BaseComponent.h

@@ -4,7 +4,7 @@
 class BaseComponent {
 protected:
     int top, left, width, height;
-    bool focused;
+    bool focusStatus;
 
 public:
     BaseComponent(int top, int left, int width, int height) : top(top), left(left), width(width), height(height) {};
@@ -36,8 +36,12 @@ public:
         return height;
     }
 
-    void setFocused(bool focused) {
-        this->focused = focused;
+    void setFocus(bool focused) {
+        this->focusStatus = focused;
+    }
+
+    bool isFocused() {
+        return focusStatus;
     }
 
     void setPosition(int top, int left) {

mystl/my_vector.h

@@ -88,6 +88,16 @@ public:
         }
     }
 
+    void erase(size_t index) override {
+        if (index >= m_size) {
+            throw std::out_of_range("Index out of range");
+        }
+        for (size_t i = index; i < m_size - 1; ++i) {
+            m_data[i] = std::move(m_data[i + 1]);
+        }
+        --m_size;
+    }
+
     T& top() override {
         return back();
     }

utils/FocusManager.h

@@ -0,0 +1,47 @@
+#ifndef FOCUSMANAGER_H
+#define FOCUSMANAGER_H
+
+
+#include "../mystl/my_vector.h"
+#include "../components/BaseComponent.h"
+
+class FocusManager {
+private:
+    MyVector<BaseComponent*> components;
+
+public:
+    FocusManager();
+    ~FocusManager() {
+        components.clear();
+    }
+
+    void addComponent(BaseComponent* component) {
+        components.push_back(component);
+    }
+
+    void removeComponent(BaseComponent* component) {
+        for(int i = 0; i < components.size(); i++) {
+            if(components[i] == component) {
+                components.erase(i);
+                break;
+            }
+        }
+    }
+
+    void setFocus(BaseComponent* component) {
+        if(component->isFocused()) return;
+        for(int i = 0; i < components.size(); i++) {
+            components[i]->setFocus(false);
+        }
+        component->setFocus(true);
+    }
+
+    BaseComponent* getFocusedComponent() {
+        for(int i = 0; i < components.size(); i++) {
+            if(components[i]->isFocused()) return components[i];
+        }
+        return NULL;
+    }
+};
+
+#endif

utils/InputManager.h

@@ -1,4 +0,0 @@
-#ifndef INPUTMANAGER_H
-#define INPUTMANAGER_H
-
-#endif