wg_view.h

一个小巧的嵌入式图形系统wGUI, 可以用VC编译

// wg_view.h
//
// CView interface
//
//
// Copyright (c) 2002 Rob Wiskow
// [e-mail]
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//


#ifndef _WG_VIEW_H_
#define _WG_VIEW_H_

#include "wg_window.h"
#include "SDL.h"
#include "wg_menu.h"


namespace
{
const int DEFAULT_BPP = 16;
}


namespace wGui
{

//! A general view class

//! A CView creates itself as a root window (it has no parent)
//! and responds to APP_PAINT messages with itself or 0 as the destination, and will redraw all of it's children as well as itself
//! Because of a limitation in SDL, there can be only one View

class CView : public CWindow
{
public:
	//! \param Rect A CRect that defines the outer limits of the control
	//! \param sTitle The window title, which will appear in the title bar of the view
	//! \param bResizable If true, the window will be resizable (defaults to true)
	//! \param bFullScreen If true, the window will be created full-screen, and the bResizable parameter will be ignored (defaults to false)
	CView(const CRect& Rect, std::string sTitle, bool bResizable = true, bool bFullScreen = false);

	//! Standard Destructor
	virtual ~CView(void);

	//! \return true if the view is resizable
	bool IsResizable(void) { return m_bResizable; }

	//! \return true if the view was created as fullscreen
	bool IsFullScreen(void) { return m_bFullScreen; }

	//! Attaches a standard menu to the view, if the view already has a menu, the old menu will be deleted
	//! \param pMenu A pointer to the menu, the CView is then responsible for cleaning it up, passing in 0 will delete the current menu
	void AttachMenu(CMenu* pMenu);

	//! \return A pointer to the view's menu, 0 if the view doesn't have a menu
	CMenu* GetMenu(void) { return m_pMenu; }


	// CWindow Overrides
	//! Set the WindowText of the view, which is used as the window caption
	//! \param sText The text to assign to the view
	virtual void SetWindowText(const std::string& sText);


	// CMessageClient overrides
	//! Handles APP_PAINT messages with itself or 0 as the destination, and will redraw all of it's children as well as itself
	virtual bool HandleMessage(CMessage* pMessage);


protected:
	bool m_bResizable;  //!< Indicates if the view is resizable
	bool m_bFullScreen;  //!< Indicates if the view was created as fullscreen
	CMenu* m_pMenu;  //!< A pointer to the view's menu


private:
	//! A pointer to the one allowed view, this is due to the SDL limitation of having only one window
	static CView* m_pInstance;
	void operator=(CView) { }  //!< The assignment operator is not allowed for CWindow derived objects
};

}

#endif // _WG_VIEW_H_