CWE-ou-minkata/Sources/Plasma/PubUtilLib/plInputCore/plInputDevice.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

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*==LICENSE==*/
// plInputDevice.cpp
//#include "STRING"

#include "hsConfig.h"
#include "hsWindows.h"

#include "plInputDevice.h"
#include "plInputManager.h"
#include "plAvatarInputInterface.h"
#include "plMessage/plInputEventMsg.h"
#include "pnMessage/plTimeMsg.h"
#include "hsUtils.h"
#include "plgDispatch.h"

#include "plPipeline/plPlates.h"
#include "plPipeline/plDebugText.h"
#include "plGImage/plMipmap.h"

#include "hsWindows.h"
#include "plPipeline.h"

// The resolution that uses the base size of the cursor. 
// All other resolutions will scale the cursor size to keep the same physical size.
#define BASE_WIDTH 1024
#define BASE_HEIGHT 768

plKeyboardDevice* plKeyboardDevice::fInstance = nil;
bool plKeyboardDevice::fKeyboardState[256];
hsBool plKeyboardDevice::fIgnoreCapsLock = false;
hsBool plKeyboardDevice::fKeyIsDeadKey = false;

plKeyboardDevice::plKeyboardDevice() :
fShiftKeyDown(false),
fCapsLockKeyDown(false),
fAltKeyDown(false),
fCtrlKeyDown(false),
fCapsLockLock(false),
fPrevNumLockOn(false),
fControlMode(STANDARD_MODE)
{
	fInstance = this;
	fStartedUpWithNumLockOn = ((GetKeyState(VK_NUMLOCK) & 1) != 0);
	InitKeyboardState();
}

plKeyboardDevice::~plKeyboardDevice()
{
	if (fStartedUpWithNumLockOn)
		ForceNumLock(true);
}

void plKeyboardDevice::InitKeyboardState()
{
	static bool initialized = false;
	if (!initialized)
	{
		for (unsigned int i = 0; i < 256; ++i)
			plKeyboardDevice::fKeyboardState[i] = false;
		initialized = true;
	}
}

void plKeyboardDevice::ReleaseAllKeys()
{
	// send a key-up message for all "normal" keys
	for (unsigned int i = 0; i < 256; ++i)
	{
		if ((i == KEY_SHIFT) || (i == KEY_CTRL) || (i == KEY_CAPSLOCK))
			continue; // these are handled slightly differently

		if (fKeyboardState[i])
		{
			fKeyboardState[i] = false;

			// fake a key-up command
			plKeyEventMsg* pMsg = TRACKED_NEW plKeyEventMsg;
			pMsg->SetKeyCode( (plKeyDef)i );
			pMsg->SetKeyDown( false );
			pMsg->SetShiftKeyDown( fShiftKeyDown );
			pMsg->SetCtrlKeyDown( fCtrlKeyDown );
			pMsg->SetCapsLockKeyDown( fCapsLockLock );
			pMsg->SetRepeat( false );
			plgDispatch::MsgSend( pMsg );
		}
	}

	// send key messages for shift and ctrl if necessary because the keys above need to have
	// the proper states of the shift and ctrl keys sent with their messages, and our internal
	// flags for these keys need to be cleared. We don't send a key-up message for caps lock
	// because it doesn't really operate like every other key on the keyboard
	if (fKeyboardState[KEY_SHIFT])
	{
		fKeyboardState[KEY_SHIFT] = false;
		fShiftKeyDown = false;

		plKeyEventMsg* pMsg = TRACKED_NEW plKeyEventMsg;
		pMsg->SetKeyCode( KEY_SHIFT );
		pMsg->SetKeyDown( false );
		pMsg->SetShiftKeyDown( false );
		pMsg->SetCtrlKeyDown( false );
		pMsg->SetCapsLockKeyDown( fCapsLockLock );
		pMsg->SetRepeat( false );
		plgDispatch::MsgSend( pMsg );
	}
	if (fKeyboardState[KEY_CTRL])
	{
		fKeyboardState[KEY_CTRL] = false;
		fCtrlKeyDown = false;

		plKeyEventMsg* pMsg = TRACKED_NEW plKeyEventMsg;
		pMsg->SetKeyCode( KEY_CTRL );
		pMsg->SetKeyDown( false );
		pMsg->SetShiftKeyDown( false );
		pMsg->SetCtrlKeyDown( false );
		pMsg->SetCapsLockKeyDown( fCapsLockLock );
		pMsg->SetRepeat( false );
		plgDispatch::MsgSend( pMsg );
	}
}

hsBool plKeyboardDevice::IsCapsLockKeyOn()
{
	return fCapsLockLock;
}

void plKeyboardDevice::Shutdown()
{
}

#if HS_BUILD_FOR_WIN32
void plKeyboardDevice::ForceNumLock(hsBool on)
{
	if (on != ((GetKeyState(VK_NUMLOCK) & 1) != 0))
	{
		OSVERSIONINFO info;
		info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
		GetVersionEx(&info);
		if (info.dwPlatformId == VER_PLATFORM_WIN32_NT)
		{
			keybd_event( VK_NUMLOCK, 0, KEYEVENTF_EXTENDEDKEY | 0, 0 );
			keybd_event( VK_NUMLOCK, 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0 );
		}
		else
		{
			UInt8 keyState[256];
			GetKeyboardState(keyState);
			keyState[VK_NUMLOCK] = keyState[VK_NUMLOCK] ^ 1;
			SetKeyboardState(keyState);
		}
	}
}
#endif //HS_BUILD_FOR_WIN32

void plKeyboardDevice::HandleKeyEvent(plOSMsg message, plKeyDef key, bool bKeyDown, hsBool bKeyRepeat)
{
	// update the internal keyboard state
	unsigned int keyCode = (unsigned int)key;
	if ((key >= 0) && (key < 256))
		fKeyboardState[key] = bKeyDown;

#if HS_BUILD_FOR_WIN32
	if (key == VK_NUMLOCK && bKeyDown)
	{
		ForceNumLock(false);
	}
#endif // HS_BUILD_FOR_WIN32

	if (key == KEY_SHIFT)
	{
		fShiftKeyDown = bKeyDown;
//		return;
	}
	if (key == KEY_CTRL)
	{
		fCtrlKeyDown = bKeyDown;
//		return;
	}
	if (key == KEY_CAPSLOCK)
	{
		// Keyboards toggle the light on key-down, so I'm going with that.
		if (bKeyDown && !bKeyRepeat)
		{
			fCapsLockLock = !fCapsLockLock;
			plAvatarInputInterface::GetInstance()->ForceAlwaysRun(fCapsLockLock);
		}
	}

	// send a key event...
	plKeyEventMsg* pMsg = TRACKED_NEW plKeyEventMsg;
	pMsg->SetKeyCode( key );
	pMsg->SetKeyDown( bKeyDown );
	pMsg->SetShiftKeyDown( fShiftKeyDown );
	pMsg->SetCtrlKeyDown( fCtrlKeyDown );
	pMsg->SetCapsLockKeyDown( fCapsLockLock );
	pMsg->SetRepeat(bKeyRepeat);
	plgDispatch::MsgSend( pMsg );
}

void plKeyboardDevice::HandleWindowActivate(bool bActive, HWND hWnd)
{
	if (bActive)
	{
		fCtrlKeyDown = false;
		
		#if HS_BUILD_FOR_WIN32
		{
			fPrevNumLockOn = ((GetKeyState(VK_NUMLOCK) & 1) != 0);
			ForceNumLock(false);
			hsBool oldLock = fCapsLockLock;
			fCapsLockLock = (GetKeyState(KEY_CAPSLOCK) & 1) != 0;
			if (fCapsLockLock != oldLock)
				plAvatarInputInterface::GetInstance()->ForceAlwaysRun(fCapsLockLock);
		}
		#endif
	}
	else
	{
		ReleaseAllKeys(); // send key-up events for everything since we're losing focus
		#if HS_BUILD_FOR_WIN32
		{
			if (fPrevNumLockOn)
				ForceNumLock(true);
		}
		#endif
	}

}

//// KeyEventToChar //////////////////////////////////////////////////////////
//	Translate a Plasma key event to an actual char
char	plKeyboardDevice::KeyEventToChar( plKeyEventMsg *msg )
{
	short	code = msg->GetKeyCode();
	char	c = 0;
	unsigned char *kbState = TRACKED_NEW unsigned char[256];
	unsigned char *buffer = TRACKED_NEW unsigned char[256];
	UINT scanCode;
	int		retVal;

	buffer[0] = 0;

	switch( code )
	{
		case KEY_A:
		case KEY_B:
		case KEY_C:
		case KEY_D:
		case KEY_E:
		case KEY_F:
		case KEY_G:
		case KEY_H:
		case KEY_I:
		case KEY_J:
		case KEY_K:
		case KEY_L:
		case KEY_M:
		case KEY_N:
		case KEY_O:
		case KEY_P:
		case KEY_Q:
		case KEY_R:
		case KEY_S:
		case KEY_T:
		case KEY_U:
		case KEY_V:
		case KEY_W:
		case KEY_X:
		case KEY_Y:
		case KEY_Z:
		case KEY_1:
		case KEY_2:
		case KEY_3:
		case KEY_4:
		case KEY_5:
		case KEY_6:
		case KEY_7:
		case KEY_8:
		case KEY_9:
		case KEY_0:
		case KEY_TILDE:
		case KEY_COMMA:
		case KEY_PERIOD:
		case KEY_LBRACKET:
		case KEY_RBRACKET:
		case KEY_BACKSLASH:
		case KEY_SLASH:
		case KEY_DASH:
		case KEY_EQUAL:
		case KEY_SEMICOLON:
		case KEY_QUOTE:
			// let windows translate everything for us!
			scanCode = MapVirtualKeyEx(code,0,GetKeyboardLayout(0));
			GetKeyboardState(kbState);
			if (fIgnoreCapsLock)
				kbState[KEY_CAPSLOCK] = 0; // clear the caps lock key
			retVal = ToAsciiEx(code,scanCode,kbState,(unsigned short*)buffer,0,GetKeyboardLayout(0));
			if (retVal == 2)
			{
				if ((buffer[0] == buffer[1]) && (!fKeyIsDeadKey))
				{
					// it's actually a dead key, since the previous key wasn't a dead key
					c = (char)buffer[0];
					fKeyIsDeadKey = true;
				}
				else
				{
					c = (char)buffer[1]; // it was an untranslated dead key, so copy the unconverted key
					fKeyIsDeadKey = false;
				}
			}
			else if (retVal == 0)
				c = 0; // it's invalid
			else
			{
				c = (char)buffer[0];
				if (retVal < 0) // the key was a dead key
					fKeyIsDeadKey = true;
				else
					fKeyIsDeadKey = false;
			}
			break;

		case KEY_ESCAPE: c = 27; break;
		case KEY_TAB: c = '\t'; break;
		case KEY_BACKSPACE: c = 8; break;
		case KEY_ENTER: c = '\n'; break;
		case KEY_SPACE: c = ' '; break;

		// numlock on numbers
		case KEY_NUMPAD0: c = '0'; break;
		case KEY_NUMPAD1: c = '1'; break;
		case KEY_NUMPAD2: c = '2'; break;
		case KEY_NUMPAD3: c = '3'; break;
		case KEY_NUMPAD4: c = '4'; break;
		case KEY_NUMPAD5: c = '5'; break;
		case KEY_NUMPAD6: c = '6'; break;
		case KEY_NUMPAD7: c = '7'; break;
		case KEY_NUMPAD8: c = '8'; break;
		case KEY_NUMPAD9: c = '9'; break;

		// everything else
		default:
			c = 0;
			break;
	}

	delete [] kbState;
	delete [] buffer;

	return c;
}


//
//
//
// plMouseDevice
//
//

bool plMouseDevice::bMsgAlways = true;
bool plMouseDevice::bCursorHidden = false;
bool plMouseDevice::bCursorOverride = false;
bool plMouseDevice::bInverted = false;
hsScalar plMouseDevice::fWidth = BASE_WIDTH;
hsScalar plMouseDevice::fHeight = BASE_HEIGHT;
plMouseDevice* plMouseDevice::fInstance = 0;

plMouseDevice::plMouseDevice()
{
	fXPos = 0;
	fYPos = 0;
	fCursorID = CURSOR_UP;
	fButtonState = 0;
	fOpacity = 1.f;

	fCursor = nil;
	CreateCursor( fCursorID );
	plMouseDevice::fInstance = this;
	fXMsg = nil;
	fYMsg = nil;
	fB2Msg = nil;

	fLeftBMsg[0] = nil;
	fLeftBMsg[1] = nil;
	fRightBMsg[0] = nil;
	fRightBMsg[1] = nil;
	fMiddleBMsg[0] = nil;
	fMiddleBMsg[1] = nil;
	
}

plMouseDevice::~plMouseDevice()
{
	plPlateManager::Instance().DestroyPlate( fCursor );
	fCursor = nil;
	plMouseDevice::fInstance = nil;
}
void plMouseDevice::SetDisplayResolution(hsScalar Width, hsScalar Height)
{
	fWidth = Width;
	fHeight = Height;
	IUpdateCursorSize();
}

void	plMouseDevice::CreateCursor( char* cursor )
{
	if( fCursor == nil )
	{
		plPlateManager::Instance().CreatePlate( &fCursor );
		fCursor->CreateFromResource(cursor);
	}
	else
	{
		fCursor->ReloadFromResource(cursor);
	}
	fCursor->SetPosition( 0, 0, 0 );
	IUpdateCursorSize();

	fCursor->SetVisible( true );
	fCursor->SetOpacity( fOpacity );
}

void plMouseDevice::IUpdateCursorSize()
{
	if(fCursor)
	{
		// set the size of the cursor based on resolution.
		fCursor->SetSize( 2*fCursor->GetMipmap()->GetWidth()/fWidth, 2*fCursor->GetMipmap()->GetHeight()/fHeight );
	}
}

void plMouseDevice::AddNameToCursor(const char* name)
{
	if (fInstance && name)
	{
		plDebugText		&txt = plDebugText::Instance();
		txt.DrawString(fInstance->fWXPos + 12 ,fInstance->fWYPos - 7,name);
	}
}
void plMouseDevice::AddCCRToCursor()
{
	if (fInstance)
	{
		plDebugText		&txt = plDebugText::Instance();
		txt.DrawString(fInstance->fWXPos + 12, fInstance->fWYPos - 17, "CCR");
	}
}
void plMouseDevice::AddIDNumToCursor(UInt32 idNum)
{
	if (fInstance && idNum)
	{
		plDebugText		&txt = plDebugText::Instance();
		char str[256];
		sprintf(str, "%d",idNum);
		txt.DrawString(fInstance->fWXPos + 12 ,fInstance->fWYPos + 3,str);
	}
}
		

void plMouseDevice::SetCursorX(hsScalar x)
{
	/// Set the cursor position
	if( fCursor == nil  && !plMouseDevice::bCursorHidden)
		CreateCursor( fCursorID );
	
	if (fCursor)
		fCursor->SetPosition( ( x * 2.0f ) - 1.0f, 
						  ( fYPos * 2.0f ) - 1.0f );

//	plDebugText		&txt = plDebugText::Instance();
//	txt.DrawString(fWXPos + 20,fWYPos - 5,"test");

}
void plMouseDevice::SetCursorY(hsScalar y)
{
	/// Set the cursor position
	if( fCursor == nil && !plMouseDevice::bCursorHidden)
		CreateCursor( fCursorID );
	
	if (fCursor)
		fCursor->SetPosition( ( fXPos * 2.0f ) - 1.0f, 
						  ( y * 2.0f ) - 1.0f );

//	plDebugText		&txt = plDebugText::Instance();
//	txt.DrawString(fWXPos + 20,fWYPos - 10,"test");

}


void plMouseDevice::HideCursor(hsBool override)
{
	if( fInstance->fCursor != nil )
		fInstance->fCursor->SetVisible( false );

	plMouseDevice::bCursorOverride = (override != 0);
	plMouseDevice::bCursorHidden = true;

}

void plMouseDevice::ShowCursor(hsBool override)
{
	if( !plMouseDevice::bCursorHidden )
		return;
	if (plMouseDevice::bCursorOverride && !override)
		return;

	plMouseDevice::bCursorHidden = false;
	plMouseDevice::bCursorOverride = false;
	
	if( fInstance->fCursor == nil )
		fInstance->CreateCursor( fInstance->fCursorID );
	fInstance->fCursor->SetVisible( true );
}

void plMouseDevice::NewCursor(char* cursor)
{
	fInstance->fCursorID = cursor;
	fInstance->CreateCursor(cursor);
	fInstance->SetCursorX(fInstance->GetCursorX());
	fInstance->SetCursorY(fInstance->GetCursorY());
	
	if (!plMouseDevice::bCursorHidden)
		fInstance->fCursor->SetVisible( true );
}

void	plMouseDevice::SetCursorOpacity( hsScalar opacity )
{
	fInstance->fOpacity = opacity;
	if( fInstance->fCursor != nil )
		fInstance->fCursor->SetOpacity( opacity );
}

hsBool plMouseDevice::MsgReceive(plMessage* msg)
{	
	plEvalMsg* pEMsg = plEvalMsg::ConvertNoRef(msg);
	if (pEMsg)
	{
		if (fXMsg)
		{
			plgDispatch::MsgSend(fXMsg);
			fXMsg = nil;
		}
		else
		{
			plMouseEventMsg* pMsg = TRACKED_NEW plMouseEventMsg;
			pMsg->SetXPos( fXPos );
			pMsg->SetYPos( fYPos );
			pMsg->SetDX(0);
			pMsg->SetDY(0);
			plgDispatch::MsgSend(pMsg);
		}

		if (fYMsg)
		{
			plgDispatch::MsgSend(fYMsg);
			fYMsg = nil;
		}
		else
		{
			plMouseEventMsg* pMsg = TRACKED_NEW plMouseEventMsg;
			pMsg->SetXPos( fXPos );
			pMsg->SetYPos( fYPos );
			pMsg->SetDX(0);
			pMsg->SetDY(0);
			plgDispatch::MsgSend(pMsg);
		}

		if( fB2Msg )
		{
			fB2Msg->Send();
			fB2Msg = nil;
		}

		// look for mouse button events in the queues to be sent now
		// ...Left mouse button
		if ( fLeftBMsg[0] != nil)
		{
			fLeftBMsg[0]->Send();
			// slide queue elements over... get 'em on the next eval
			fLeftBMsg[0] = fLeftBMsg[1];
			fLeftBMsg[1] = nil;
		}
		// ...Right mouse button
		if ( fRightBMsg[0] != nil)
		{
			fRightBMsg[0]->Send();
			// slide queue elements over... get 'em on the next eval
			fRightBMsg[0] = fRightBMsg[1];
			fRightBMsg[1] = nil;
		}
		// ...middle mouse button
		if ( fMiddleBMsg[0] != nil)
		{
			fMiddleBMsg[0]->Send();
			// slide queue elements over... get 'em on the next eval
			fMiddleBMsg[0] = fMiddleBMsg[1];
			fMiddleBMsg[1] = nil;
		}
	
	}
	
	plIMouseXEventMsg* pXMsg = plIMouseXEventMsg::ConvertNoRef(msg);
	if (pXMsg)
	{
		// send a mouse event
		plMouseEventMsg* pMsg = TRACKED_NEW plMouseEventMsg;
		if (pXMsg->fX == 999)
			pMsg->SetXPos( fXPos + 0.001f );
		else
		if (pXMsg->fX == -999)
			pMsg->SetXPos( fXPos - 0.001f );
		else
			pMsg->SetXPos(pXMsg->fX);
		pMsg->SetYPos( fYPos );
		pMsg->SetDX( ( fXPos - pMsg->GetXPos())  );
		pMsg->SetDY(0);
		
		if (pMsg->GetDX() == 0.0f && !plMouseDevice::bMsgAlways)
		{	
			delete pMsg;
			return true;
		}
		if (fXMsg)
			delete fXMsg;
		fXMsg = pMsg;
		
		if (pXMsg->fX == 999)
			fXPos += 0.01;
		else
		if (pXMsg->fX == -999)
			fXPos -= 0.01;
		else
			fXPos = pXMsg->fX;

		SetCursorX(fXPos);
		fWXPos = pXMsg->fWx;
		return true;
	}

	plIMouseYEventMsg* pYMsg = plIMouseYEventMsg::ConvertNoRef(msg);
	if (pYMsg)
	{
		// send a mouse event
		plMouseEventMsg* pMsg = TRACKED_NEW plMouseEventMsg;
		pMsg->SetXPos( fXPos );
		if (pYMsg->fY == 999)
			pMsg->SetYPos( fYPos + 0.01f );
		else
		if (pYMsg->fY == -999)
			pMsg->SetYPos( fYPos - 0.01f );
		else
			pMsg->SetYPos(pYMsg->fY);
		pMsg->SetDX(0);
		pMsg->SetDY(fYPos  - pMsg->GetYPos());
		
		if (pMsg->GetDY() == 0.0f && !plMouseDevice::bMsgAlways)
		{	
			delete pMsg;
			return true;
		}
		if (fYMsg)
			delete fYMsg;
		fYMsg = pMsg;
		
		if (pYMsg->fY == 999)
			fYPos += 0.01;
		else
		if (pYMsg->fY == -999)
			fYPos -= 0.01;
		else
			fYPos = pYMsg->fY;

		fWYPos = pYMsg->fWy;
		SetCursorY(fYPos);
		
		return true;
	}
	plIMouseBEventMsg* pBMsg = plIMouseBEventMsg::ConvertNoRef(msg);
	if (pBMsg)
	{
		
		// send a mouse event
		plMouseEventMsg* pMsg = TRACKED_NEW plMouseEventMsg;
		pMsg->SetXPos( fXPos );
		pMsg->SetYPos( fYPos );
		pMsg->SetDX(0);
		pMsg->SetDY(0);

		bool deleteMe = true;

		// which button is different?
		if (pBMsg->fButton & kLeftButtonDown && !(fButtonState & kLeftButtonDown))
		{
			// left button now down
			fButtonState |= kLeftButtonDown;
			pMsg->SetButton( kLeftButtonDown );
			deleteMe = false;
		}
		else
		if (pBMsg->fButton & kLeftButtonUp && fButtonState & kLeftButtonDown)
		{
			// left button now up
			fButtonState &= ~kLeftButtonDown;
			pMsg->SetButton( kLeftButtonUp );
			deleteMe = false;
		}
		else
		if (pBMsg->fButton & kRightButtonDown && !(fButtonState & kRightButtonDown))
		{
			// right button now down
			fButtonState |= kRightButtonDown;
			pMsg->SetButton( kRightButtonDown );
			deleteMe = false;
		}
		else
		if (pBMsg->fButton & kRightButtonUp && fButtonState & kRightButtonDown)
		{
			// right button now up
			fButtonState &= ~kRightButtonDown;
			pMsg->SetButton( kRightButtonUp );
			deleteMe = false;
		}
		else
		if (pBMsg->fButton & kMiddleButtonDown && !(fButtonState & kMiddleButtonDown))
		{
			// mouse wheel button now down
			fButtonState |= kMiddleButtonDown;
			pMsg->SetButton( kMiddleButtonDown );
			deleteMe = false;
		}
		else
		if (pBMsg->fButton & kMiddleButtonUp && fButtonState & kMiddleButtonDown)
		{
			// right button now up
			fButtonState &= ~kMiddleButtonDown;
			pMsg->SetButton( kMiddleButtonUp );
			deleteMe = false;
		}

		if (pBMsg->fButton & kRightButtonDblClk)
		{
			// right button dbl clicked, send TWO messages
			plMouseEventMsg* pMsg2 = TRACKED_NEW plMouseEventMsg;
			pMsg2->SetXPos( fXPos );
			pMsg2->SetYPos( fYPos );
			pMsg2->SetDX(0);
			pMsg2->SetDY(0);
			pMsg2->SetButton( kRightButtonDblClk );

			if( fB2Msg != nil )
				delete fB2Msg;
			fB2Msg = pMsg2;

			pMsg->SetButton( kRightButtonDown );
			deleteMe = false;
		}
		else
		if (pBMsg->fButton & kLeftButtonDblClk)
		{
			// left button dbl clicked, send TWO messages
			plMouseEventMsg* pMsg2 = TRACKED_NEW plMouseEventMsg;
			pMsg2->SetXPos( fXPos );
			pMsg2->SetYPos( fYPos );
			pMsg2->SetDX(0);
			pMsg2->SetDY(0);
			pMsg2->SetButton( kLeftButtonDblClk );

			if( fB2Msg != nil )
				delete fB2Msg;
			fB2Msg = pMsg2;

			pMsg->SetButton( kLeftButtonDown );
			deleteMe = false;
		}

		if( deleteMe )
		{
			// mouse button state not changed
			delete pMsg;
			return true;
		}

		// we are going to save up to two button mouse events per button (left and right)
		// that will be dispatched on the next eval

		// which button is this for?
		if ( pMsg->GetButton() == kLeftButtonDown || pMsg->GetButton() == kLeftButtonUp )
		{
			// see if the queue is just empty
			if ( fLeftBMsg[0] == nil)
			{
				// nothing to think about... goes in first slot
				fLeftBMsg[0] = pMsg;
			}
			else if (fLeftBMsg[1] == nil)
			{
				// nothing to think about... goes in second slot
				fLeftBMsg[1] = pMsg;
			}
			else
			{
				// else queue if full... need to make some decisions
				plMouseEventMsg* lastMsg = plMouseEventMsg::ConvertNoRef(pMsg);
				// ...if this is an up event and [1] is a down then we need to remove both
				//    ...because we can't lose the up event and the down will have no match
				if ( pMsg->GetButton() == kLeftButtonUp && lastMsg && lastMsg->GetButton() == kLeftButtonDown)
				{
					delete pMsg;
					delete fLeftBMsg[1];
					fLeftBMsg[1] = nil;
				}
				// ... otherwise ignore this event
				else
				{
					delete pMsg;
				}
			}
		}
		else if ( pMsg->GetButton() == kRightButtonDown || pMsg->GetButton() == kRightButtonUp )
		{
			// see if the queue is just empty
			if ( fRightBMsg[0] == nil)
			{
				// nothing to think about... goes in first slot
				fRightBMsg[0] = pMsg;
			}
			else if (fRightBMsg[1] == nil)
			{
				// nothing to think about... goes in second slot
				fRightBMsg[1] = pMsg;
			}
			else
			{
				// else queue if full... need to make some decisions
				plMouseEventMsg* lastMsg = plMouseEventMsg::ConvertNoRef(pMsg);
				// ...if this is an up event and [1] is a down then we need to remove both
				//    ...because we can't lose the up event and the down will have no match
				if ( pMsg->GetButton() == kRightButtonUp && lastMsg && lastMsg->GetButton() == kRightButtonDown)
				{
					delete pMsg;
					delete fRightBMsg[1];
					fRightBMsg[1] = nil;
				}
				// ... otherwise ignore this event
				else
				{
					delete pMsg;
				}
			}
		}
		else if ( pMsg->GetButton() == kMiddleButtonDown || pMsg->GetButton() == kMiddleButtonUp )
		{
			// see if the queue is just empty
			if ( fMiddleBMsg[0] == nil)
			{
				// nothing to think about... goes in first slot
				fMiddleBMsg[0] = pMsg;
			}
			else if (fMiddleBMsg[1] == nil)
			{
				// nothing to think about... goes in second slot
				fMiddleBMsg[1] = pMsg;
			}
			else
			{
				// else queue if full... need to make some decisions
				plMouseEventMsg* lastMsg = plMouseEventMsg::ConvertNoRef(pMsg);
				// ...if this is an up event and [1] is a down then we need to remove both
				//    ...because we can't lose the up event and the down will have no match
				if ( pMsg->GetButton() == kMiddleButtonUp && lastMsg && lastMsg->GetButton() == kMiddleButtonDown)
				{
					delete pMsg;
					delete fMiddleBMsg[1];
					fMiddleBMsg[1] = nil;
				}
				// ... otherwise ignore this event
				else
				{
					delete pMsg;
				}
			}
		}
		// we are going to dispatch the mouse button events right away
		// and not wait for the next eval, because we shouldn't miss one of these
		
		return true;
	}
	return false;
}