gui.h

一个非常有用的开源代码

// ********************************************************
// This is demo code. You may derive from, use, modify, and
// distribute it without limitation for any purpose.
// Obviously you don't get a warranty or an assurance of
// fitness for a particular purpose with this code. Your
// welcome to remove this header and claim original
// authorship. I really don't care.
// ********************************************************

#ifndef __GUI_H__
#define __GUI_H__

#include <SDL/SDL.h>
#include "../GClasses/GWidgets.h"

class ControllerBase;


inline Uint32* getPixMem32(SDL_Surface *surface, int x, int y)
{
	return (Uint32*)((Uint8*)surface->pixels + y * surface->pitch + (x << 2));
}

inline Uint16* getPixMem16(SDL_Surface *pScreen, int x, int y)
{
	return (Uint16*)pScreen->pixels + y * pScreen->pitch / 2 + x;
}


class ViewBase
{
protected:
	SDL_Surface* m_pScreen;
	GRect m_screenRect;

public:
	ViewBase();
	virtual ~ViewBase();

	void Update();

	virtual void OnChar(char c) = 0;
	virtual void OnMouseDown(int x, int y) = 0;
	virtual void OnMouseUp(int x, int y) = 0;
	virtual bool OnMousePos(int x, int y) = 0;

protected:
	static void BlitImage(SDL_Surface* pScreen, int x, int y, GImage* pImage);
	static void StretchClipAndBlitImage(SDL_Surface* pScreen, GRect* pDestRect, GRect* pClipRect, GImage* pImage);

	virtual void Draw(SDL_Surface* pScreen) = 0;
	void DrawDot(SDL_Surface *pScreen, int x, int y, GColor col, int nSize);
	void SetScreenSize(int x, int y);
};


class ControllerBase
{
protected:
	enum KeyState
	{
		Normal,
		Holding,
		Repeating,
	};

	static char* s_szAppPath;

	bool m_bKeepRunning;
	int m_keyboard[SDLK_LAST];
	int m_mouse[4];
	int m_mouseX;
	int m_mouseY;
	bool m_bMouseDown;
	KeyState m_eKeyState;
	SDLKey m_lastPressedKey;
	double m_dKeyRepeatTimer;
	ViewBase* m_pView;

public:
	ControllerBase();
	virtual ~ControllerBase();

	static void SetAppPath(char* szAppPath) { s_szAppPath = szAppPath; }
	static const char* GetAppPath() { return s_szAppPath; }

	bool HandleEvents(double dTimeDelta);
	void Quit() { m_bKeepRunning = false; }

protected:
	void HandleKeyPress(SDLKey eKey, SDLMod mod);
	void HandleMouseClick();
};



void OpenFile(const char* szFilename);


#endif // __GUI_H__