From bf3fc19eaa0ccecf35f3eae22e9e600aa239c680 Mon Sep 17 00:00:00 2001
From: kiritow <1362050620@qq.com>
Date: Fri, 21 Apr 2017 11:25:08 +0800
Subject: [PATCH] Add class Cursor

---
 MiniEngine.cpp | 113 +++++++++++++++++++++++++++++++++++++++++++++++++
 MiniEngine.h   |  28 ++++++++++++
 2 files changed, 141 insertions(+)

diff --git a/MiniEngine.cpp b/MiniEngine.cpp
index e3d1478..1d09c2f 100644
--- a/MiniEngine.cpp
+++ b/MiniEngine.cpp
@@ -50,6 +50,72 @@ namespace MiniEngine
                 return SDL_BLENDMODE_NONE;
             }
         }
+
+        SystemCursorType getCursorTypeFromSDLSystemCursor(SDL_SystemCursor id)
+        {
+            switch(id)
+            {
+            case SDL_SYSTEM_CURSOR_ARROW:
+                return SystemCursorType::Arrow;
+            case SDL_SYSTEM_CURSOR_CROSSHAIR:
+                return SystemCursorType::CrossHair;
+            case SDL_SYSTEM_CURSOR_HAND:
+                return SystemCursorType::Hand;
+            case SDL_SYSTEM_CURSOR_IBEAM:
+                return SystemCursorType::Ibeam;
+            case SDL_SYSTEM_CURSOR_NO:
+                return SystemCursorType::No;
+            case SDL_SYSTEM_CURSOR_SIZEALL:
+                return SystemCursorType::SizeAll;
+            case SDL_SYSTEM_CURSOR_SIZENESW:
+                return SystemCursorType::SizeNESW;
+            case SDL_SYSTEM_CURSOR_SIZENS:
+                return SystemCursorType::SizeNS;
+            case SDL_SYSTEM_CURSOR_SIZENWSE:
+                return SystemCursorType::SizeNWSE;
+            case SDL_SYSTEM_CURSOR_SIZEWE:
+                return SystemCursorType::SizeWE;
+            case SDL_SYSTEM_CURSOR_WAIT:
+                return SystemCursorType::Wait;
+            case SDL_SYSTEM_CURSOR_WAITARROW:
+                return SystemCursorType::WaitArrow;
+            default:/// return SystemCursorType::Arrow on default.
+                return SystemCursorType::Arrow;
+            }
+        }
+
+        SDL_SystemCursor getSDLSystemCursorFromSystemCursorType(SystemCursorType type)
+        {
+            switch(type)
+            {
+            case SystemCursorType::Arrow:
+                return SDL_SYSTEM_CURSOR_ARROW;
+            case SystemCursorType::CrossHair:
+                return SDL_SYSTEM_CURSOR_CROSSHAIR;
+            case SystemCursorType::Hand:
+                return SDL_SYSTEM_CURSOR_HAND;
+            case SystemCursorType::Ibeam:
+                return SDL_SYSTEM_CURSOR_IBEAM;
+            case SystemCursorType::No:
+                return SDL_SYSTEM_CURSOR_NO;
+            case SystemCursorType::SizeAll:
+                return SDL_SYSTEM_CURSOR_SIZEALL;
+            case SystemCursorType::SizeNESW:
+                return SDL_SYSTEM_CURSOR_SIZENESW;
+            case SystemCursorType::SizeNS:
+                return SDL_SYSTEM_CURSOR_SIZENS;
+            case SystemCursorType::SizeNWSE:
+                return SDL_SYSTEM_CURSOR_SIZENWSE;
+            case SystemCursorType::SizeWE:
+                return SDL_SYSTEM_CURSOR_SIZEWE;
+            case SystemCursorType::Wait:
+                return SDL_SYSTEM_CURSOR_WAIT;
+            case SystemCursorType::WaitArrow:
+                return SDL_SYSTEM_CURSOR_WAITARROW;
+            default:/// return SDL_SYSTEM_CURSOR_ARROW on default.
+                return SDL_SYSTEM_CURSOR_ARROW;
+            }
+        }
     }/// End of namespace _internal
 
 	Rect::Rect(int X, int Y, int W, int H)
@@ -735,6 +801,53 @@ namespace MiniEngine
 		return t;
 	}
 
+	//private
+	void Cursor::_set(SDL_Cursor* p)
+	{
+        _cur.reset(p,SDL_FreeCursor);
+	}
+
+	//private
+	void Cursor::_set_no_delete(SDL_Cursor* p)
+	{
+        _cur.reset(p,[](SDL_Cursor* p){});
+	}
+
+	//private
+	SDL_Cursor* Cursor::_get()
+	{
+        return _cur.get();
+	}
+
+	//static
+    Cursor Cursor::CreateCursor(Surface surf,Point hotspot)
+    {
+        Cursor ns;
+        SDL_Cursor* cursor=SDL_CreateColorCursor(surf._get(),hotspot.x,hotspot.y);
+        ns._set(cursor);
+        return ns;
+    }
+
+    //static
+    Cursor Cursor::CreateSystemCursor(SystemCursorType type)
+    {
+        Cursor ns;
+        ns._set(SDL_CreateSystemCursor(_internal::getSDLSystemCursorFromSystemCursorType(type)));
+        return ns;
+    }
+
+    //static
+    bool Cursor::isShow()
+    {
+        return (SDL_ShowCursor(SDL_QUERY)==SDL_ENABLE);
+    }
+
+    //static
+    void Cursor::show(bool Settings)
+    {
+        SDL_ShowCursor(Settings?SDL_ENABLE:SDL_DISABLE);
+    }
+
 	bool Renderer::isReady()
 	{
 		return (_get() != nullptr);
diff --git a/MiniEngine.h b/MiniEngine.h
index 176094a..d31942b 100644
--- a/MiniEngine.h
+++ b/MiniEngine.h
@@ -150,6 +150,7 @@ namespace MiniEngine
 		friend class Window;
 		friend class Renderer;
 		friend class Font;
+		friend class Cursor;
 	};
 
 	class Texture
@@ -232,6 +233,33 @@ namespace MiniEngine
 		friend class Window;
 	};
 
+	enum class SystemCursorType
+	{
+	    Arrow, Ibeam, CrossHair,
+        Wait, WaitArrow,
+        SizeNWSE, SizeNESW, SizeWE, SizeNS, SizeAll,
+        No, Hand
+    };
+
+	class Cursor
+	{
+    public:
+        static Cursor CreateSystemCursor(SystemCursorType);
+        static Cursor CreateCursor(Surface surf,Point hotspot={0,0});
+
+        static Cursor GetActiveCursor();
+        static Cursor GetDefaultCursor();
+
+        static void show(bool);
+        static bool isShow();
+    private:
+        std::shared_ptr<SDL_Cursor> _cur;
+        void _set(SDL_Cursor*);
+        void _set_no_delete(SDL_Cursor*);
+        SDL_Cursor* _get();
+        void _clear();
+	};
+
 	enum class MessageBoxType { Error, Warning, Information };
 
 	class Window