Changing Cursor Appearance on Hover

1#include <SDL.h>
2#include <SDL_image.h>
3#include <unordered_map>
4#include <string>
5
6class CursorManager {
7public:
8  // Cursor types our game supports
9  enum class CursorType {
10    Default,
11    Attack,
12    Interact
13  };
14
15  CursorManager() {
16    // Load different cursor images
17    LoadCursor("default.png", CursorType::Default);
18    LoadCursor("sword.png", CursorType::Attack);
19    LoadCursor("hand.png", CursorType::Interact);
20
21    // Start with default cursor
22    SetActiveCursor(CursorType::Default);
23  }
24
25  ~CursorManager() {
26    for (auto& [type, cursor] : Cursors) {
27      SDL_FreeCursor(cursor);
28    }
29  }
30
31private:
32  void LoadCursor(const std::string& path, CursorType type) {
33    SDL_Surface* surface{IMG_Load(path.c_str())};
34    if (!surface) {
35      return;
36    }
37
38    SDL_Cursor* cursor{SDL_CreateColorCursor(surface, 0, 0)};
39    SDL_FreeSurface(surface);
40
41    if (cursor) {
42      Cursors[type] = cursor;
43    }
44  }
45
46  void SetActiveCursor(CursorType type) {
47    if (auto it = Cursors.find(type); it != Cursors.end()) {
48      SDL_SetCursor(it->second);
49      CurrentType = type;
50    }
51  }
52
53  std::unordered_map<CursorType, SDL_Cursor*> Cursors;
54  CursorType CurrentType{CursorType::Default};
55};

1void GameWorld::Update() {
2  int mouseX, mouseY;
3  SDL_GetMouseState(&mouseX, &mouseY);
4
5  // Check for intersections with game objects
6  for (const auto& enemy : Enemies) {
7    SDL_Rect enemyRect{
8      enemy.GetX(), enemy.GetY(),
9      enemy.GetWidth(), enemy.GetHeight()
10    };
11
12    if (mouseX >= enemyRect.x &&
13        mouseX < enemyRect.x + enemyRect.w &&
14        mouseY >= enemyRect.y &&
15        mouseY < enemyRect.y + enemyRect.h) {
16      CursorManager.SetActiveCursor(
17        CursorType::Attack
18      );
19      return;
20    }
21  }
22
23  // No intersections found, revert to default
24  CursorManager.SetActiveCursor(CursorType::Default);
25}