Writing Win32 Apps with C++ only classes (part 3)

#include "StdAfx.h"
#include "msgloop.h"

namespace GE_{namespace NWin{


	GE_INLINE bool SMsgLoop::IsIdleMessage(UINT msg)
	{
		// These messages should NOT cause idle processing
		switch(msg)
		{
		case WM_NCMOUSEMOVE:
		case WM_MOUSEMOVE:
		case WM_PAINT:
		case 0x0118:	// WM_SYSTIMER (caret blink)
			return false;
		}
		return true;
	}


	GE_INLINE bool SMsgLoop::LoopBody()
	{
		MSG msg;
		
		if(!GetMessage(&msg, 0,0,0)) //wait next message
			return false; //peeked up a quit message
		STRACE(trc,0,("Msg rcv CMessageLoop: HWND %p, Msg %p\n", msg.hwnd, msg.message));
		
		//do eventual message filtering
		if(!SMsgFilterEvent::GetGlobal()(msg))
		{	
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}

		//do Idle processing (if any)
		static bool bMustDoIdle = false;
		bMustDoIdle |= IsIdleMessage(msg.message);
		if(bMustDoIdle && !PeekMessage(&msg, 0,0,0, PM_NOREMOVE))
		{
			SIdleEvent::GetGlobal()(this);
			bMustDoIdle = false;
		}

		return true; //continue the loop
	}

	GE_INLINE bool SMsgLoop::LoopWhile(bool& bContinue)
	{
		while(bContinue)
			if(!LoopBody())
				return false;
		return true;
	}

	GE_INLINE void SMsgLoop::Loop(HWND hMainWnd)
	{
		bool b = true;
		if(hMainWnd)
			_hWnd = hMainWnd;
		STRACE(trc, 1, ("Entering message loop %s %p\n", typeid(*this).name(), this));
		LoopWhile(b);
		STRACE(trc1,1,("Leaving message loop %s %p\n", typeid(*this).name(), this));
	}

}}