winamp/Src/Plugins/Visualization/vis_milk2/menu.cpp

/*
  LICENSE
  -------
Copyright 2005-2013 Nullsoft, Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

  * Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer. 

  * Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution. 

  * Neither the name of Nullsoft nor the names of its contributors may be used to 
    endorse or promote products derived from this software without specific prior written permission. 
 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR 
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 
OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "api__vis_milk2.h"
#include "state.h"		// for CBlendableFloat - fix this
#include "menu.h"
#include "plugin.h"
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include "resource.h"

extern CPlugin g_plugin;		// declared in main.cpp

//----------------------------------------

CMilkMenuItem::CMilkMenuItem()
{
	WASABI_API_LNGSTRINGW_BUF(IDS_UNTITLED_MENU_ITEM,m_szName,64);
	m_szToolTip[0] = 0;
	m_type = MENUITEMTYPE_BUNK;
	m_fMin = 0.0f;
	m_fMax = 0.0f;
	m_var_offset = NULL;
	m_pCallbackFn = NULL;
	m_pNext = NULL;
	m_original_value = NULL;
	m_nLastCursorPos = 0;
    m_bEnabled = true;
}

CMilkMenuItem::~CMilkMenuItem()
{
	if (m_pNext)
	{
		delete m_pNext;
		m_pNext = NULL;
	}
}

//----------------------------------------

CMilkMenu::CMilkMenu()
{
    //Reset();
}

CMilkMenu::~CMilkMenu()
{
    /*
	if (m_pFirstChildItem)
	{
		delete m_pFirstChildItem;
		m_pFirstChildItem = NULL;
	}
    */
}

//----------------------------------------

bool CMilkMenu::ItemIsEnabled(int j)
{
    if (j < m_nChildMenus)
        return m_ppChildMenu[j]->IsEnabled();
    
    int i = m_nChildMenus;
    CMilkMenuItem *pChild = m_pFirstChildItem;
    while (pChild && i<j) 
    {
        pChild = pChild->m_pNext;
        i++;
    }   
    if (pChild)
        return pChild->m_bEnabled;

    return false;
}

//----------------------------------------

void CMilkMenu::EnableItem(wchar_t* szName, bool bEnable)
{
    //search submenus
	int i = 0;
	for (i=0; i<m_nChildMenus; i++) {
        if (!wcscmp(m_ppChildMenu[i]->GetName(), szName)) 
        {
            m_ppChildMenu[i]->Enable(bEnable);
            if (!bEnable) 
            {
                while (m_nCurSel > 0 && !ItemIsEnabled(m_nCurSel))
    			    m_nCurSel--;
                if (m_nCurSel==0 && !ItemIsEnabled(m_nCurSel))
                    while (m_nCurSel < m_nChildMenus+m_nChildItems-1 && !ItemIsEnabled(m_nCurSel))
    			        m_nCurSel++;
            }
            return;
        }
    }

    //search child items
    CMilkMenuItem *pChild = m_pFirstChildItem;
    while (pChild) 
    {
        if (!wcscmp(pChild->m_szName, szName))
        {
            pChild->m_bEnabled = bEnable;
            if (!bEnable)
            {
                while (m_nCurSel > 0 && !ItemIsEnabled(m_nCurSel))
    			    m_nCurSel--;
                if (m_nCurSel==0 && !ItemIsEnabled(m_nCurSel))
                    while (m_nCurSel < m_nChildMenus+m_nChildItems-1 && !ItemIsEnabled(m_nCurSel))
    			        m_nCurSel++;
            }
            return;
        }
        pChild = pChild->m_pNext;
        i++;
    }   
}

//----------------------------------------

void CMilkMenu::Reset()
{
	m_pParentMenu = NULL;
	for (int i=0; i<MAX_CHILD_MENUS; i++)
		m_ppChildMenu[i] = NULL;
	m_pFirstChildItem = NULL;
	WASABI_API_LNGSTRINGW_BUF(IDS_UNTITLED_MENU,m_szMenuName,64);
	m_nChildMenus = 0;
	m_nChildItems = 0;
	m_nCurSel = 0;
	m_bEditingCurSel = false;
    m_bEnabled = true;
}

//----------------------------------------

void CMilkMenu::Init(wchar_t *szName)
{
    Reset();
    if (szName && szName[0]) 
        wcsncpy(m_szMenuName, szName, 64); 
}

void CMilkMenu::Finish()
{
	if (m_pFirstChildItem)
	{
		delete m_pFirstChildItem;
		m_pFirstChildItem = NULL;
	}
}

//----------------------------------------

void CMilkMenu::AddChildMenu(CMilkMenu *pMenu)
{
	if (m_nChildMenus < MAX_CHILD_MENUS)
	{
		m_ppChildMenu[m_nChildMenus++] = pMenu;
		pMenu->SetParentPointer(this);
	}
}

//----------------------------------------

void CMilkMenu::AddItem(wchar_t *szName, void *var, MENUITEMTYPE type, wchar_t *szToolTip, 
						float min, float max, MilkMenuCallbackFnPtr pCallback,
						unsigned int wParam, unsigned int lParam)
{
	CMilkMenuItem *pLastItem = NULL;

	// find last item in linked list
	if (!m_pFirstChildItem)
	{
		// first item
		m_pFirstChildItem = new CMilkMenuItem;
		pLastItem = m_pFirstChildItem;
	}
	else
	{
		pLastItem = m_pFirstChildItem;
		while (pLastItem->m_pNext)
			pLastItem = pLastItem->m_pNext;
		
		// allocate a new CMilkMenuItem
		pLastItem->m_pNext = new CMilkMenuItem;
		pLastItem = pLastItem->m_pNext;
	}

	// set its attributes
	wcsncpy(pLastItem->m_szName, szName, 64);
	wcsncpy(pLastItem->m_szToolTip, szToolTip, 1024);
	pLastItem->m_var_offset = (size_t)var - (size_t)(g_plugin.m_pState);
	pLastItem->m_type = type;
	pLastItem->m_fMin = min;
	pLastItem->m_fMax = max;
    pLastItem->m_wParam = wParam;
    pLastItem->m_lParam = lParam;
	if ((type==MENUITEMTYPE_LOGBLENDABLE || type==MENUITEMTYPE_LOGFLOAT) && min==max)
	{
		// special defaults
		pLastItem->m_fMin = 0.01f;
		pLastItem->m_fMax = 100.0f;
	}
	pLastItem->m_pCallbackFn = pCallback;

	m_nChildItems++;
}

//----------------------------------------

void MyMenuTextOut(eFontIndex font_index, wchar_t* str, DWORD color, RECT* pRect, int bCalcRect, RECT* pCalcRect) 
{
    if (bCalcRect)
    { 
        RECT t = *pRect;
		pRect->top += g_plugin.m_text.DrawTextW(g_plugin.GetFont(font_index), str, -1, &t, DT_SINGLELINE | DT_END_ELLIPSIS | DT_CALCRECT, 0xFFFFFFFF, false); 
        pCalcRect->bottom += t.bottom - t.top; 
        //if (pCalcRect->bottom > pRect->bottom)
        //    pCalcRect->bottom = pRect->bottom;
        pCalcRect->right = max(pCalcRect->right, pCalcRect->left + t.right - t.left); 
    } 
    else
    {
		pRect->top += g_plugin.m_text.DrawTextW(g_plugin.GetFont(font_index), str, -1, pRect, DT_SINGLELINE | DT_END_ELLIPSIS, color, false);
    }
}

void CMilkMenu::DrawMenu(RECT rect, int xR, int yB, int bCalcRect, RECT* pCalcRect)
{
    // 'rect' is the bounding rectangle in which we're allowed to draw the menu;
    //   it's .top member is incremented as we draw downward.
    // if bCalcRect==1, then we return pCalcRect as the area that the menu actually
    //   occupies, excluding any tooltips.

    if (bCalcRect!=0 && pCalcRect==NULL)
        return;

    if (bCalcRect)
    {
        pCalcRect->left   = rect.left; 
        pCalcRect->right  = rect.left;
        pCalcRect->top    = rect.top;
        pCalcRect->bottom = rect.top;
    }
    
	if (!m_bEditingCurSel)
	{
		int nLines = (rect.bottom - rect.top - PLAYLIST_INNER_MARGIN*2) / g_plugin.GetFontHeight(SIMPLE_FONT) - 1;	// save 1 line for the tooltip
        if (nLines<1) return;
		int nStart = (m_nCurSel/nLines)*nLines;

        int nLinesDrawn = 0;
		int i = 0;
		for (i=0; i < m_nChildMenus; i++)
		{
			if (i >= nStart && i < nStart+nLines)
			{
                //rect.top += g_plugin.GetFont(SIMPLE_FONT)->DrawText(m_ppChildMenu[i]->m_szMenuName, -1, pRect, DT_SINGLELINE | DT_END_ELLIPSIS, (i == m_nCurSel) ? MENU_HILITE_COLOR : MENU_COLOR);
                if (m_ppChildMenu[i]->IsEnabled()) {
                    MyMenuTextOut(SIMPLE_FONT, m_ppChildMenu[i]->m_szMenuName, (i == m_nCurSel) ? MENU_HILITE_COLOR : MENU_COLOR, &rect, bCalcRect, pCalcRect);
                    nLinesDrawn++;
                }

				if (g_plugin.m_bShowMenuToolTips && i == m_nCurSel && !bCalcRect)
				{
					// tooltip:
                    g_plugin.DrawTooltip(WASABI_API_LNGSTRINGW(IDS_SZ_MENU_NAV_TOOLTIP), xR, yB);
				}
			}
		}

		CMilkMenuItem *pItem = m_pFirstChildItem;

		while (pItem && nLinesDrawn < nStart+nLines)
		{
            if (!pItem->m_bEnabled) 
            {
                pItem = pItem->m_pNext;
                i++;
                continue;
            }

			size_t addr = pItem->m_var_offset + (size_t)g_plugin.m_pState;
			if (i >= nStart)
			{
				wchar_t szItemText[256];
				switch(pItem->m_type)
				{
				case MENUITEMTYPE_STRING:
					lstrcpyW(szItemText, pItem->m_szName);
					break;
				case MENUITEMTYPE_BOOL:
					swprintf(szItemText, L"%s [%s]", pItem->m_szName,
							 WASABI_API_LNGSTRINGW(*((bool *)(addr)) ? IDS_ON : IDS_OFF));
					break;
				default:
					lstrcpyW(szItemText, pItem->m_szName);
					break;
				}

				if (i == m_nCurSel)
				{
                    MyMenuTextOut(SIMPLE_FONT, szItemText, MENU_HILITE_COLOR, &rect, bCalcRect, pCalcRect);

					if (g_plugin.m_bShowMenuToolTips && !bCalcRect)
					{
						// tooltip:
                        g_plugin.DrawTooltip(pItem->m_szToolTip, xR, yB);
					}
				}
				else
				{
                    MyMenuTextOut(SIMPLE_FONT, szItemText, MENU_COLOR, &rect, bCalcRect, pCalcRect);
				}
                nLinesDrawn++;
			}

			pItem = pItem->m_pNext;
			i++;
		}
	}
	else
	{
		// editing current selection

		// find the item
		CMilkMenuItem *pItem = m_pFirstChildItem;
		for (int i=m_nChildMenus; i < m_nCurSel; i++) 
			pItem = pItem->m_pNext;
		size_t addr = pItem->m_var_offset + (size_t)g_plugin.m_pState;

		wchar_t buf[256];

        MyMenuTextOut(SIMPLE_FONT, WASABI_API_LNGSTRINGW(IDS_USE_UP_DOWN_ARROW_KEYS), MENU_COLOR, &rect, bCalcRect, pCalcRect);
		swprintf(buf, WASABI_API_LNGSTRINGW(IDS_CURRENT_VALUE_OF_X), pItem->m_szName);
        MyMenuTextOut(SIMPLE_FONT, buf, MENU_COLOR, &rect, bCalcRect, pCalcRect);

		switch(pItem->m_type)
		{
		case MENUITEMTYPE_INT:
			swprintf(buf, L" %d ", *((int*)(addr)) );
			break;
		case MENUITEMTYPE_FLOAT: 
		case MENUITEMTYPE_LOGFLOAT:
			swprintf(buf, L" %5.3f ", *((float*)(addr)) );
			break;
		case MENUITEMTYPE_BLENDABLE:
		case MENUITEMTYPE_LOGBLENDABLE:
			swprintf(buf, L" %5.3f ", ((CBlendableFloat*)addr)->eval(-1) );
			break;
		default:
			lstrcpyW(buf, L" ? ");
			break;
		}

        MyMenuTextOut(SIMPLE_FONT, buf, MENU_HILITE_COLOR, &rect, bCalcRect, pCalcRect);

		// tooltip:
		if (g_plugin.m_bShowMenuToolTips && !bCalcRect)
		{
            g_plugin.DrawTooltip(pItem->m_szToolTip, xR, yB);
		}
	}
}

void CMilkMenu::OnWaitStringAccept(wchar_t *szNewString)
{
	m_bEditingCurSel = false;

	// find the item
	CMilkMenuItem *pItem = m_pFirstChildItem;
	for (int i=m_nChildMenus; i < m_nCurSel; i++) 
		pItem = pItem->m_pNext;
	size_t addr = pItem->m_var_offset + (size_t)g_plugin.m_pState;
	
	assert(pItem->m_type == MENUITEMTYPE_STRING);

	// apply the edited string 
	lstrcpyW((wchar_t *)(addr), szNewString);

	// if user gave us a callback function pointer, call it now
	if (pItem->m_pCallbackFn)
	{
		pItem->m_pCallbackFn(0, 0);
	}

	// remember the last cursor position
	pItem->m_nLastCursorPos = g_plugin.m_waitstring.nCursorPos;
}

//----------------------------------------

LRESULT CMilkMenu::HandleKeydown(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	// all WM_KEYDOWNS that your app gets when a menu is up should be handled here, 
	//  by the menu that is currently active.
	
	// return value: FALSE if it handled the key; TRUE if it didn't

    int nRepeat = LOWORD(lParam);
    int rep;

	if (!m_bEditingCurSel)
	{
		switch(wParam)
		{
		case VK_UP:
            for (rep=0; rep<nRepeat; rep++)
            {
                if (m_nCurSel==0)
                    break;
                do {
			        m_nCurSel--;
                } while (m_nCurSel > 0 && !ItemIsEnabled(m_nCurSel));
            }
			if (m_nCurSel < 0) m_nCurSel = 0;//m_nChildMenus + m_nChildItems - 1;
            while (m_nCurSel < m_nChildMenus + m_nChildItems - 1 && !ItemIsEnabled(m_nCurSel))
			    m_nCurSel++;
			return 0; // we processed (or absorbed) the key

		case VK_DOWN:
            for (rep=0; rep<nRepeat; rep++)
            {
                if (m_nCurSel == m_nChildMenus + m_nChildItems - 1)
                    break;
                do {
			        m_nCurSel++;
                } while (m_nCurSel < m_nChildMenus + m_nChildItems - 1 && !ItemIsEnabled(m_nCurSel));
            }
            if (m_nCurSel >= m_nChildMenus + m_nChildItems) m_nCurSel = m_nChildMenus + m_nChildItems - 1;//0;
            while (m_nCurSel > 0 && !ItemIsEnabled(m_nCurSel))
			    m_nCurSel--;
			return 0; // we processed (or absorbed) the key

		case VK_HOME:
			m_nCurSel = 0;
			return 0; // we processed (or absorbed) the key

		case VK_END:
			m_nCurSel = m_nChildMenus + m_nChildItems - 1;
			return 0; // we processed (or absorbed) the key

		case VK_ESCAPE:
			g_plugin.m_UI_mode = UI_REGULAR;
			return 0; // we processed (or absorbed) the key

		case VK_BACK:
		case VK_LEFT:
			if (m_pParentMenu)
				g_plugin.m_pCurMenu = m_pParentMenu;
			else
				g_plugin.m_UI_mode = UI_REGULAR;		// exit the menu
			return 0; // we processed (or absorbed) the key

		case VK_RETURN:
		case VK_RIGHT:
		case VK_SPACE:
			if (m_nCurSel < m_nChildMenus)
			{	
				// go to sub-menu
				g_plugin.m_pCurMenu = m_ppChildMenu[m_nCurSel];
			}
			else
			{
				// find the item
				CMilkMenuItem *pItem = GetCurItem();
				size_t addr = pItem->m_var_offset + (size_t)g_plugin.m_pState;

				float fTemp;

				// begin editing the item

				switch(pItem->m_type)
				{
                case MENUITEMTYPE_UIMODE:
                    g_plugin.m_UI_mode = (ui_mode)pItem->m_wParam;

                    if (g_plugin.m_UI_mode==UI_IMPORT_WAVE || 
                        g_plugin.m_UI_mode==UI_EXPORT_WAVE ||
                        g_plugin.m_UI_mode==UI_IMPORT_SHAPE ||
                        g_plugin.m_UI_mode==UI_EXPORT_SHAPE)
                    {
			            g_plugin.m_bPresetLockedByCode = true;

			            // enter WaitString mode
			            g_plugin.m_waitstring.bActive = true;
			            g_plugin.m_waitstring.bFilterBadChars = false;
			            g_plugin.m_waitstring.bDisplayAsCode = false;
			            g_plugin.m_waitstring.nSelAnchorPos = -1;
			            g_plugin.m_waitstring.nMaxLen = min(sizeof(g_plugin.m_waitstring.szText)-1, MAX_PATH - wcslen(g_plugin.GetPresetDir()) - 6);	// 6 for the extension + null char.    We set this because win32 LoadFile, MoveFile, etc. barf if the path+filename+ext are > MAX_PATH chars.
						swprintf(g_plugin.m_waitstring.szText, L"%sfile.dat", g_plugin.m_szPresetDir);
                        if (g_plugin.m_UI_mode==UI_IMPORT_WAVE || g_plugin.m_UI_mode==UI_IMPORT_SHAPE)
							WASABI_API_LNGSTRINGW_BUF(IDS_LOAD_FROM_FILE,g_plugin.m_waitstring.szPrompt,512);
                        else
							WASABI_API_LNGSTRINGW_BUF(IDS_SAVE_TO_FILE,g_plugin.m_waitstring.szPrompt,512);
			            g_plugin.m_waitstring.szToolTip[0] = 0;
			            g_plugin.m_waitstring.nCursorPos = wcslen(g_plugin.m_waitstring.szText);	// set the starting edit position
                    }
                    break;
				case MENUITEMTYPE_BOOL:
					*((bool *)addr) = !(*((bool *)addr));
					break;
				case MENUITEMTYPE_INT:
					m_bEditingCurSel = true;
					pItem->m_original_value = (LPARAM)(*((int*)(addr)));
					break;
				case MENUITEMTYPE_FLOAT: 
				case MENUITEMTYPE_LOGFLOAT:
					m_bEditingCurSel = true;
					pItem->m_original_value = (LPARAM)(*((float*)(addr))*10000L);
					break;
				case MENUITEMTYPE_BLENDABLE:
				case MENUITEMTYPE_LOGBLENDABLE:
					m_bEditingCurSel = true;
					{
						//CBlendableFloat *p = (CBlendableFloat*)(pItem->m_pVariable);
						//*p = 0.99f;
						fTemp = ((CBlendableFloat*)addr)->eval(-1);//p->eval(-1);
					}
					pItem->m_original_value = (LPARAM)(fTemp*10000L);
					break;
				case MENUITEMTYPE_STRING:
					// enter waitstring mode.  ***This function will cease to receive keyboard input
					// while the string is being edited***
					g_plugin.m_UI_mode = UI_EDIT_MENU_STRING;
					g_plugin.m_waitstring.bActive = true;
					g_plugin.m_waitstring.bFilterBadChars = false;
					g_plugin.m_waitstring.bDisplayAsCode = true;
					g_plugin.m_waitstring.nSelAnchorPos = -1;
                    g_plugin.m_waitstring.nMaxLen = pItem->m_wParam ? pItem->m_wParam : 8190;
                    g_plugin.m_waitstring.nMaxLen = min(g_plugin.m_waitstring.nMaxLen, sizeof(g_plugin.m_waitstring.szText)-16);
					//lstrcpyW(g_plugin.m_waitstring.szText, (wchar_t *)addr);
					lstrcpyA((char*)g_plugin.m_waitstring.szText, (char*)addr);
					swprintf(g_plugin.m_waitstring.szPrompt, WASABI_API_LNGSTRINGW(IDS_ENTER_THE_NEW_STRING), pItem->m_szName);
					lstrcpyW(g_plugin.m_waitstring.szToolTip, pItem->m_szToolTip);
					g_plugin.m_waitstring.nCursorPos = strlen/*wcslen*/((char*)g_plugin.m_waitstring.szText);
					if (pItem->m_nLastCursorPos < g_plugin.m_waitstring.nCursorPos)
						g_plugin.m_waitstring.nCursorPos = pItem->m_nLastCursorPos;
					break;
				/*
				case MENUITEMTYPE_OSC:
					m_bEditingCurSel = true;
					pItem->m_bEditingSubSel = false;
					break;
					*/
				}
			}
			return 0; // we processed (or absorbed) the key

		default:
			// key wasn't handled
			return TRUE;
			break;
		}
	}
	else  // m_bEditingCurSel
	{
		float fMult = 1.0f;
		bool  bDec;

		// find the item
		CMilkMenuItem *pItem = m_pFirstChildItem;
		for (int i=m_nChildMenus; i < m_nCurSel; i++) 
			pItem = pItem->m_pNext;
		size_t addr = pItem->m_var_offset + (size_t)g_plugin.m_pState;

		switch(wParam)
		{
		case VK_ESCAPE:		// exit Edit mode & restore original value
			
			switch(pItem->m_type)
			{
			case MENUITEMTYPE_INT:			
				m_bEditingCurSel = false;
				*((int *)addr) = (int)pItem->m_original_value;  
				break;
			case MENUITEMTYPE_FLOAT:		
				m_bEditingCurSel = false;
				*((float *)addr) = ((float)pItem->m_original_value)*0.0001f;  
				break;
			case MENUITEMTYPE_LOGFLOAT:		
				m_bEditingCurSel = false;
				*((float *)addr) = ((float)pItem->m_original_value)*0.0001f;  
				break;
			case MENUITEMTYPE_BLENDABLE:	
				m_bEditingCurSel = false;
				*((CBlendableFloat *)(addr)) = ((float)(pItem->m_original_value))*0.0001f;  
				break;
			case MENUITEMTYPE_LOGBLENDABLE:	
				m_bEditingCurSel = false;
				*((CBlendableFloat *)(addr)) = ((float)(pItem->m_original_value))*0.0001f;  
				break;
			//case MENUITEMTYPE_STRING:  
				// won't ever happen - see OnWaitStringCancel()
			}
			return 0;

		case VK_RETURN:

			//if (pItem->m_type == MENUITEMTYPE_STRING)
			//	... won't ever happen - see OnWaitStringAccept()

			m_bEditingCurSel = false;
			return 0;


		case VK_NEXT:
		case VK_PRIOR:
			fMult *= 10.0f;
            // break intentionally left out here...
		case VK_UP:
		case VK_DOWN:

			{
				USHORT mask = 1 << (sizeof(USHORT)*8 - 1);	// we want the highest-order bit
				bool bShiftHeldDown = (GetKeyState(VK_SHIFT) & mask) != 0;
				//bool bCtrlHeldDown = (GetKeyState(VK_CONTROL) & mask) != 0;
				if (bShiftHeldDown && (wParam==VK_UP || wParam==VK_DOWN))
					fMult *= 0.1f;
			}
			
			bDec = (wParam == VK_DOWN || wParam == VK_NEXT);

			switch(pItem->m_type)
			{
			case MENUITEMTYPE_INT:
				{
					int *pInt = ((int *)addr);
                    if (fMult<1) fMult=1;
					(*pInt) += (int)((bDec) ? -fMult : fMult);
					if (*pInt < pItem->m_fMin) *pInt = (int)pItem->m_fMin;
					if (*pInt > pItem->m_fMax) *pInt = (int)pItem->m_fMax;
				}
				break;
			case MENUITEMTYPE_FLOAT: 
				{
					float *pFloat = ((float *)addr);
					float fInc = (pItem->m_fMax - pItem->m_fMin)*0.01f*fMult;
					(*pFloat) += (bDec) ? -fInc : fInc;
					if (*pFloat < pItem->m_fMin) *pFloat = pItem->m_fMin;
					if (*pFloat > pItem->m_fMax) *pFloat = pItem->m_fMax;
				}
				break;
			case MENUITEMTYPE_LOGFLOAT:
				{
					float *pFloat = ((float *)addr);
					(*pFloat) *= (bDec) ? powf(1.0f/1.01f, fMult) : powf(1.01f, fMult);
					if (*pFloat < pItem->m_fMin) *pFloat = pItem->m_fMin;
					if (*pFloat > pItem->m_fMax) *pFloat = pItem->m_fMax;
				}
				break;
			case MENUITEMTYPE_BLENDABLE: 
				{
					CBlendableFloat *pBlend = ((CBlendableFloat *)addr);
					float fInc = (pItem->m_fMax - pItem->m_fMin)*0.01f*fMult;
					(*pBlend) += (bDec) ? -fInc : fInc;
					if (pBlend->eval(-1) < pItem->m_fMin) *pBlend = pItem->m_fMin;
					if (pBlend->eval(-1) > pItem->m_fMax) *pBlend = pItem->m_fMax;
				}
				break;
			case MENUITEMTYPE_LOGBLENDABLE:
				{
					CBlendableFloat *pBlend = ((CBlendableFloat *)addr);
					(*pBlend) *= (bDec) ? powf(1.0f/1.01f, fMult) : powf(1.01f, fMult);
					if (pBlend->eval(-1) < pItem->m_fMin) *pBlend = pItem->m_fMin;
					if (pBlend->eval(-1) > pItem->m_fMax) *pBlend = pItem->m_fMax;
				}
				break;
			/*
			case MENUITEMTYPE_OSC:
				if (pItem->m_bEditingSubSel)
				{
					if (wParam == VK_UP)
					{
						pItem->m_nSubSel--;
						if (pItem->m_nSubSel < 0) pItem->m_nSubSel = 4;
					}
					else if (wParam == VK_DOWN)
					{
						pItem->m_nSubSel++;
						if (pItem->m_nSubSel > 4) pItem->m_nSubSel = 0;
					}
				}
				else
				{
					switch(pItem->m_nSubSel)
					{
						also to do: make 'drawtext' draw it properly 

					case 0: 
						fixme	- what are the bounds for each type?  and are incs constant or log?
						break;
					case 1: 
						fixme
						break;
					case 2: 
						fixme
						break;
					case 3: 
						fixme
						break;
					case 4: 
						fixme
						break;
					}
				}
				break;
				*/
			}
			return 0;

		default:
			// key wasn't handled
			return TRUE;
			break;
		}
	}

	return TRUE;
}