Added YUV routines needed for v4l driver, and in the future possibly

[wine/gsoc-2012-control.git] / dlls / comctl32 / updown.c

/*
 * Updown control
 *
 * Copyright 1997, 2002 Dimitrie O. Paun
 *
 * 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
 *
 * NOTE
 * 
 * This code was audited for completeness against the documented features
 * of Comctl32.dll version 6.0 on Sep. 9, 2002, by Dimitrie O. Paun.
 * 
 * Unless otherwise noted, we believe this code to be complete, as per
 * the specification mentioned above.
 * If you discover missing features, or bugs, please note them below.
 * 
 */

#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "commctrl.h"
#include "comctl32.h"
#include "wine/unicode.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(updown);

typedef struct
{
    HWND      Self;            /* Handle to this up-down control */
    HWND      Notify;          /* Handle to the parent window */
    DWORD     dwStyle;         /* The GWL_STYLE for this window */
    UINT      AccelCount;      /* Number of elements in AccelVect */
    UDACCEL*  AccelVect;       /* Vector containing AccelCount elements */
    INT       AccelIndex;      /* Current accel index, -1 if not accel'ing */
    INT       Base;            /* Base to display nr in the buddy window */
    INT       CurVal;          /* Current up-down value */
    INT       MinVal;          /* Minimum up-down value */
    INT       MaxVal;          /* Maximum up-down value */
    HWND      Buddy;           /* Handle to the buddy window */
    INT       BuddyType;       /* Remembers the buddy type BUDDY_TYPE_* */
    INT       Flags;           /* Internal Flags FLAG_* */
    BOOL      UnicodeFormat;   /* Marks the use of Unicode internally */
} UPDOWN_INFO;

/* Control configuration constants */

#define INITIAL_DELAY   500    /* initial timer until auto-inc kicks in */
#define AUTOPRESS_DELAY 250    /* time to keep arrow pressed on KEY_DOWN */
#define REPEAT_DELAY    50     /* delay between auto-increments */

#define DEFAULT_WIDTH       14 /* default width of the ctrl */
#define DEFAULT_XSEP         0 /* default separation between buddy and ctrl */
#define DEFAULT_ADDTOP       0 /* amount to extend above the buddy window */
#define DEFAULT_ADDBOT       0 /* amount to extend below the buddy window */
#define DEFAULT_BUDDYBORDER  2 /* Width/height of the buddy border */
#define DEFAULT_BUDDYSPACER  2 /* Spacer between the buddy and the ctrl */


/* Work constants */

#define FLAG_INCR       0x01
#define FLAG_DECR       0x02
#define FLAG_MOUSEIN    0x04
#define FLAG_PRESSED    0x08
#define FLAG_ARROW      (FLAG_INCR | FLAG_DECR)

#define BUDDY_TYPE_UNKNOWN 0
#define BUDDY_TYPE_LISTBOX 1
#define BUDDY_TYPE_EDIT    2

#define TIMER_AUTOREPEAT   1
#define TIMER_ACCEL        2
#define TIMER_AUTOPRESS    3

#define UPDOWN_GetInfoPtr(hwnd) ((UPDOWN_INFO *)GetWindowLongPtrW (hwnd,0))
#define COUNT_OF(a) (sizeof(a)/sizeof(a[0]))

static const WCHAR BUDDY_UPDOWN_HWND[] = { 'b', 'u', 'd', 'd', 'y', 'U', 'p', 'D', 'o', 'w', 'n', 'H', 'W', 'N', 'D', 0 };
static const WCHAR BUDDY_SUPERCLASS_WNDPROC[] = { 'b', 'u', 'd', 'd', 'y', 'S', 'u', 'p', 'p', 'e', 'r', 
                                                  'C', 'l', 'a', 's', 's', 'W', 'n', 'd', 'P', 'r', 'o', 'c', 0 };
static void UPDOWN_DoAction (UPDOWN_INFO *infoPtr, int delta, int action);

/***********************************************************************
 *           UPDOWN_IsBuddyEdit
 * Tests if our buddy is an edit control.
 */
static inline BOOL UPDOWN_IsBuddyEdit(UPDOWN_INFO *infoPtr)
{
    return infoPtr->BuddyType == BUDDY_TYPE_EDIT;
}

/***********************************************************************
 *           UPDOWN_IsBuddyListbox
 * Tests if our buddy is a listbox control.
 */
static inline BOOL UPDOWN_IsBuddyListbox(UPDOWN_INFO *infoPtr)
{
    return infoPtr->BuddyType == BUDDY_TYPE_LISTBOX;
}

/***********************************************************************
 *           UPDOWN_InBounds
 * Tests if a given value 'val' is between the Min&Max limits
 */
static BOOL UPDOWN_InBounds(UPDOWN_INFO *infoPtr, int val)
{
    if(infoPtr->MaxVal > infoPtr->MinVal)
        return (infoPtr->MinVal <= val) && (val <= infoPtr->MaxVal);
    else
        return (infoPtr->MaxVal <= val) && (val <= infoPtr->MinVal);
}

/***********************************************************************
 *           UPDOWN_OffsetVal
 * Change the current value by delta.
 * It returns TRUE is the value was changed successfuly, or FALSE
 * if the value was not changed, as it would go out of bounds.
 */
static BOOL UPDOWN_OffsetVal(UPDOWN_INFO *infoPtr, int delta)
{
    /* check if we can do the modification first */
    if(!UPDOWN_InBounds (infoPtr, infoPtr->CurVal+delta)) {
        if (infoPtr->dwStyle & UDS_WRAP) {
            delta += (delta < 0 ? -1 : 1) *
                     (infoPtr->MaxVal < infoPtr->MinVal ? -1 : 1) *
                     (infoPtr->MinVal - infoPtr->MaxVal) +
                     (delta < 0 ? 1 : -1);
        } else return FALSE;
    }

    infoPtr->CurVal += delta;
    return TRUE;
}

/***********************************************************************
 * UPDOWN_HasBuddyBorder
 *
 * When we have a buddy set and that we are aligned on our buddy, we
 * want to draw a sunken edge to make like we are part of that control.
 */
static BOOL UPDOWN_HasBuddyBorder(UPDOWN_INFO* infoPtr)
{
    return  ( ((infoPtr->dwStyle & (UDS_ALIGNLEFT | UDS_ALIGNRIGHT)) != 0) &&
              UPDOWN_IsBuddyEdit(infoPtr) );
}

/***********************************************************************
 *           UPDOWN_GetArrowRect
 * wndPtr   - pointer to the up-down wnd
 * rect     - will hold the rectangle
 * arrow    - FLAG_INCR to get the "increment" rect (up or right)
 *            FLAG_DECR to get the "decrement" rect (down or left)
 *            If both flags are pressent, the envelope is returned.
 */
static void UPDOWN_GetArrowRect (UPDOWN_INFO* infoPtr, RECT *rect, int arrow)
{
    GetClientRect (infoPtr->Self, rect);

    /*
     * Make sure we calculate the rectangle to fit even if we draw the
     * border.
     */
    if (UPDOWN_HasBuddyBorder(infoPtr)) {
        if (infoPtr->dwStyle & UDS_ALIGNLEFT)
            rect->left += DEFAULT_BUDDYBORDER;
        else
            rect->right -= DEFAULT_BUDDYBORDER;

        InflateRect(rect, 0, -DEFAULT_BUDDYBORDER);
    }

    /* now figure out if we need a space away from the buddy */
    if ( IsWindow(infoPtr->Buddy) ) {
        if (infoPtr->dwStyle & UDS_ALIGNLEFT) rect->right -= DEFAULT_BUDDYSPACER;
        else rect->left += DEFAULT_BUDDYSPACER;
    }

    /*
     * We're calculating the midpoint to figure-out where the
     * separation between the buttons will lay. We make sure that we
     * round the uneven numbers by adding 1.
     */
    if (infoPtr->dwStyle & UDS_HORZ) {
        int len = rect->right - rect->left + 1; /* compute the width */
        if (arrow & FLAG_INCR)
            rect->left = rect->left + len/2;
        if (arrow & FLAG_DECR)
            rect->right =  rect->left + len/2 - 1;
    } else {
        int len = rect->bottom - rect->top + 1; /* compute the height */
        if (arrow & FLAG_INCR)
            rect->bottom =  rect->top + len/2 - 1;
        if (arrow & FLAG_DECR)
            rect->top =  rect->top + len/2;
    }
}

/***********************************************************************
 *           UPDOWN_GetArrowFromPoint
 * Returns the rectagle (for the up or down arrow) that contains pt.
 * If it returns the up rect, it returns TRUE.
 * If it returns the down rect, it returns FALSE.
 */
static BOOL UPDOWN_GetArrowFromPoint (UPDOWN_INFO* infoPtr, RECT *rect, POINT pt)
{
    UPDOWN_GetArrowRect (infoPtr, rect, FLAG_INCR);
    if(PtInRect(rect, pt)) return FLAG_INCR;

    UPDOWN_GetArrowRect (infoPtr, rect, FLAG_DECR);
    if(PtInRect(rect, pt)) return FLAG_DECR;

    return 0;
}


/***********************************************************************
 *           UPDOWN_GetThousandSep
 * Returns the thousand sep. If an error occurs, it returns ','.
 */
static WCHAR UPDOWN_GetThousandSep()
{
    WCHAR sep[2];

    if(GetLocaleInfoW(LOCALE_USER_DEFAULT, LOCALE_STHOUSAND, sep, 2) != 1)
        sep[0] = ',';

    return sep[0];
}

/***********************************************************************
 *           UPDOWN_GetBuddyInt
 * Tries to read the pos from the buddy window and if it succeeds,
 * it stores it in the control's CurVal
 * returns:
 *   TRUE  - if it read the integer from the buddy successfully
 *   FALSE - if an error occurred
 */
static BOOL UPDOWN_GetBuddyInt (UPDOWN_INFO *infoPtr)
{
    WCHAR txt[20], sep, *src, *dst;
    int newVal;

    if (!((infoPtr->dwStyle & UDS_SETBUDDYINT) && IsWindow(infoPtr->Buddy)))
        return FALSE;

    /*if the buddy is a list window, we must set curr index */
    if (UPDOWN_IsBuddyListbox(infoPtr)) {
        newVal = SendMessageW(infoPtr->Buddy, LB_GETCARETINDEX, 0, 0);
        if(newVal < 0) return FALSE;
    } else {
        /* we have a regular window, so will get the text */
        /* note that a zero-length string is a legitimate value for 'txt',
         * and ought to result in a successful conversion to '0'. */
        if (GetWindowTextW(infoPtr->Buddy, txt, COUNT_OF(txt)) < 0)
            return FALSE;

        sep = UPDOWN_GetThousandSep();

        /* now get rid of the separators */
        for(src = dst = txt; *src; src++)
            if(*src != sep) *dst++ = *src;
        *dst = 0;

        /* try to convert the number and validate it */
        newVal = strtolW(txt, &src, infoPtr->Base);
        if(*src || !UPDOWN_InBounds (infoPtr, newVal)) return FALSE;
    }

    TRACE("new value(%d) from buddy (old=%d)\n", newVal, infoPtr->CurVal);
    infoPtr->CurVal = newVal;
    return TRUE;
}


/***********************************************************************
 *           UPDOWN_SetBuddyInt
 * Tries to set the pos to the buddy window based on current pos
 * returns:
 *   TRUE  - if it set the caption of the  buddy successfully
 *   FALSE - if an error occurred
 */
static BOOL UPDOWN_SetBuddyInt (UPDOWN_INFO *infoPtr)
{
    WCHAR fmt[3] = { '%', 'd', '\0' };
    WCHAR txt[20];
    int len;

    if (!((infoPtr->dwStyle & UDS_SETBUDDYINT) && IsWindow(infoPtr->Buddy))) 
        return FALSE;

    TRACE("set new value(%d) to buddy.\n", infoPtr->CurVal);

    /*if the buddy is a list window, we must set curr index */
    if (UPDOWN_IsBuddyListbox(infoPtr)) {
        return SendMessageW(infoPtr->Buddy, LB_SETCURSEL, infoPtr->CurVal, 0) != LB_ERR;
    }

    /* Regular window, so set caption to the number */
    if (infoPtr->Base == 16) fmt[1] = 'X';
    len = wsprintfW(txt, fmt, infoPtr->CurVal);


    /* Do thousands separation if necessary */
    if (!(infoPtr->dwStyle & UDS_NOTHOUSANDS) && (len > 3)) {
        WCHAR tmp[COUNT_OF(txt)], *src = tmp, *dst = txt;
        WCHAR sep = UPDOWN_GetThousandSep();
        int start = len % 3;

        memcpy(tmp, txt, sizeof(txt));
        if (start == 0) start = 3;
        dst += start;
        src += start;
        for (len=0; *src; len++) {
            if (len % 3 == 0) *dst++ = sep;
            *dst++ = *src++;
        }
        *dst = 0;
    }

    return SetWindowTextW(infoPtr->Buddy, txt);
}

/***********************************************************************
 * UPDOWN_Draw
 *
 * Draw the arrows. The background need not be erased.
 */
static LRESULT UPDOWN_Draw (UPDOWN_INFO *infoPtr, HDC hdc)
{
    BOOL pressed, hot;
    RECT rect;

    /* Draw the common border between ourselves and our buddy */
    if (UPDOWN_HasBuddyBorder(infoPtr)) {
        GetClientRect(infoPtr->Self, &rect);
        DrawEdge(hdc, &rect, EDGE_SUNKEN,
                 BF_BOTTOM | BF_TOP |
                 (infoPtr->dwStyle & UDS_ALIGNLEFT ? BF_LEFT : BF_RIGHT));
    }

    /* Draw the incr button */
    UPDOWN_GetArrowRect (infoPtr, &rect, FLAG_INCR);
    pressed = (infoPtr->Flags & FLAG_PRESSED) && (infoPtr->Flags & FLAG_INCR);
    hot = (infoPtr->Flags & FLAG_INCR) && (infoPtr->Flags & FLAG_MOUSEIN);
    DrawFrameControl(hdc, &rect, DFC_SCROLL,
        (infoPtr->dwStyle & UDS_HORZ ? DFCS_SCROLLRIGHT : DFCS_SCROLLUP) |
        ((infoPtr->dwStyle & UDS_HOTTRACK) && hot ? DFCS_HOT : 0) |
        (pressed ? DFCS_PUSHED : 0) |
        (infoPtr->dwStyle & WS_DISABLED ? DFCS_INACTIVE : 0) );

    /* Draw the decr button */
    UPDOWN_GetArrowRect(infoPtr, &rect, FLAG_DECR);
    pressed = (infoPtr->Flags & FLAG_PRESSED) && (infoPtr->Flags & FLAG_DECR);
    hot = (infoPtr->Flags & FLAG_DECR) && (infoPtr->Flags & FLAG_MOUSEIN);
    DrawFrameControl(hdc, &rect, DFC_SCROLL,
        (infoPtr->dwStyle & UDS_HORZ ? DFCS_SCROLLLEFT : DFCS_SCROLLDOWN) |
        ((infoPtr->dwStyle & UDS_HOTTRACK) && hot ? DFCS_HOT : 0) |
        (pressed ? DFCS_PUSHED : 0) |
        (infoPtr->dwStyle & WS_DISABLED ? DFCS_INACTIVE : 0) );

    return 0;
}

/***********************************************************************
 * UPDOWN_Paint
 *
 * Asynchronous drawing (must ONLY be used in WM_PAINT).
 * Calls UPDOWN_Draw.
 */
static LRESULT UPDOWN_Paint (UPDOWN_INFO *infoPtr, HDC hdc)
{
    PAINTSTRUCT ps;
    if (hdc) return UPDOWN_Draw (infoPtr, hdc);
    hdc = BeginPaint (infoPtr->Self, &ps);
    UPDOWN_Draw (infoPtr, hdc);
    EndPaint (infoPtr->Self, &ps);
    return 0;
}

/***********************************************************************
 * UPDOWN_KeyPressed
 *
 * Handle key presses (up & down) when we have to do so
 */
static LRESULT UPDOWN_KeyPressed(UPDOWN_INFO *infoPtr, int key)
{
    int arrow;

    if (key == VK_UP) arrow = FLAG_INCR;
    else if (key == VK_DOWN) arrow = FLAG_DECR;
    else return 1;

    UPDOWN_GetBuddyInt (infoPtr);
    infoPtr->Flags &= ~FLAG_ARROW;
    infoPtr->Flags |= FLAG_PRESSED | arrow;
    InvalidateRect (infoPtr->Self, NULL, FALSE);
    SetTimer(infoPtr->Self, TIMER_AUTOPRESS, AUTOPRESS_DELAY, 0);
    UPDOWN_DoAction (infoPtr, 1, arrow);
    return 0;
}

/***********************************************************************
 * UPDOWN_Buddy_SubclassProc used to handle messages sent to the buddy
 *                           control.
 */
static LRESULT CALLBACK
UPDOWN_Buddy_SubclassProc(HWND  hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    WNDPROC superClassWndProc = (WNDPROC)GetPropW(hwnd, BUDDY_SUPERCLASS_WNDPROC);

    TRACE("hwnd=%p, wndProc=%p, uMsg=%04x, wParam=%08x, lParam=%08lx\n",
          hwnd, superClassWndProc, uMsg, wParam, lParam);

    if (uMsg == WM_KEYDOWN) {
        HWND upDownHwnd = GetPropW(hwnd, BUDDY_UPDOWN_HWND);

        UPDOWN_KeyPressed(UPDOWN_GetInfoPtr(upDownHwnd), (int)wParam);
    }

    return CallWindowProcW( superClassWndProc, hwnd, uMsg, wParam, lParam);
}

/***********************************************************************
 *           UPDOWN_SetBuddy
 *
 * Sets bud as a new Buddy.
 * Then, it should subclass the buddy
 * If window has the UDS_ARROWKEYS, it subcalsses the buddy window to
 * process the UP/DOWN arrow keys.
 * If window has the UDS_ALIGNLEFT or UDS_ALIGNRIGHT style
 * the size/pos of the buddy and the control are adjusted accordingly.
 */
static HWND UPDOWN_SetBuddy (UPDOWN_INFO* infoPtr, HWND bud)
{
    static const WCHAR editW[] = { 'E', 'd', 'i', 't', 0 };
    static const WCHAR listboxW[] = { 'L', 'i', 's', 't', 'b', 'o', 'x', 0 };
    RECT  budRect;  /* new coord for the buddy */
    int   x, width;  /* new x position and width for the up-down */
    WNDPROC baseWndProc;
    WCHAR buddyClass[40];
    HWND ret;

    TRACE("(hwnd=%p, bud=%p)\n", infoPtr->Self, bud);

    ret = infoPtr->Buddy;

    /* there is already a body assigned */
    if (infoPtr->Buddy)  RemovePropW(infoPtr->Buddy, BUDDY_UPDOWN_HWND);

    if(!IsWindow(bud))
        bud = 0;

    /* Store buddy window handle */
    infoPtr->Buddy = bud;

    if(bud) {

        /* keep upDown ctrl hwnd in a buddy property */
        SetPropW( bud, BUDDY_UPDOWN_HWND, infoPtr->Self);

        /* Store buddy window class type */
        infoPtr->BuddyType = BUDDY_TYPE_UNKNOWN;
        if (GetClassNameW(bud, buddyClass, COUNT_OF(buddyClass))) {
            if (lstrcmpiW(buddyClass, editW) == 0)
                infoPtr->BuddyType = BUDDY_TYPE_EDIT;
            else if (lstrcmpiW(buddyClass, listboxW) == 0)
                infoPtr->BuddyType = BUDDY_TYPE_LISTBOX;
        }

        if(infoPtr->dwStyle & UDS_ARROWKEYS){
            /* Note that I don't clear the BUDDY_SUPERCLASS_WNDPROC property
               when we reset the upDown ctrl buddy to another buddy because it is not
               good to break the window proc chain. */
            if (!GetPropW(bud, BUDDY_SUPERCLASS_WNDPROC)) {
                baseWndProc = (WNDPROC)SetWindowLongPtrW(bud, GWLP_WNDPROC, (LPARAM)UPDOWN_Buddy_SubclassProc);
                SetPropW(bud, BUDDY_SUPERCLASS_WNDPROC, (HANDLE)baseWndProc);
            }
        }

        /* Get the rect of the buddy relative to its parent */
        GetWindowRect(infoPtr->Buddy, &budRect);
        MapWindowPoints(HWND_DESKTOP, GetParent(infoPtr->Buddy), (POINT *)(&budRect.left), 2);

        /* now do the positioning */
        if  (infoPtr->dwStyle & UDS_ALIGNLEFT) {
            x  = budRect.left;
            budRect.left += DEFAULT_WIDTH + DEFAULT_XSEP;
        } else if (infoPtr->dwStyle & UDS_ALIGNRIGHT) {
            budRect.right -= DEFAULT_WIDTH + DEFAULT_XSEP;
            x  = budRect.right+DEFAULT_XSEP;
        } else {
            /* nothing to do */
            return ret;
        }

        /* first adjust the buddy to accommodate the up/down */
        SetWindowPos(infoPtr->Buddy, 0, budRect.left, budRect.top,
                     budRect.right  - budRect.left, budRect.bottom - budRect.top,
                     SWP_NOACTIVATE|SWP_NOZORDER);

        /* now position the up/down */
        /* Since the UDS_ALIGN* flags were used, */
        /* we will pick the position and size of the window. */
        width = DEFAULT_WIDTH;

        /*
         * If the updown has a buddy border, it has to overlap with the buddy
         * to look as if it is integrated with the buddy control.
         * We nudge the control or change its size to overlap.
         */
        if (UPDOWN_HasBuddyBorder(infoPtr)) {
            if(infoPtr->dwStyle & UDS_ALIGNLEFT)
                width += DEFAULT_BUDDYBORDER;
            else
                x -= DEFAULT_BUDDYBORDER;
        }

        SetWindowPos(infoPtr->Self, 0, x,
                     budRect.top - DEFAULT_ADDTOP, width,
                     budRect.bottom - budRect.top + DEFAULT_ADDTOP + DEFAULT_ADDBOT,
                     SWP_NOACTIVATE|SWP_FRAMECHANGED|SWP_NOZORDER);
    } else {
        RECT rect;
        GetWindowRect(infoPtr->Self, &rect);
        MapWindowPoints(HWND_DESKTOP, GetParent(infoPtr->Self), (POINT *)&rect, 2);
        SetWindowPos(infoPtr->Self, 0, rect.left, rect.top, DEFAULT_WIDTH, rect.bottom - rect.top,
                     SWP_NOACTIVATE|SWP_FRAMECHANGED|SWP_NOZORDER);
    }
    return ret;
}

/***********************************************************************
 *           UPDOWN_DoAction
 *
 * This function increments/decrements the CurVal by the
 * 'delta' amount according to the 'action' flag which can be a
 * combination of FLAG_INCR and FLAG_DECR
 * It notifies the parent as required.
 * It handles wraping and non-wraping correctly.
 * It is assumed that delta>0
 */
static void UPDOWN_DoAction (UPDOWN_INFO *infoPtr, int delta, int action)
{
    NM_UPDOWN ni;

    TRACE("%d by %d\n", action, delta);

    /* check if we can do the modification first */
    delta *= (action & FLAG_INCR ? 1 : -1) * (infoPtr->MaxVal < infoPtr->MinVal ? -1 : 1);
    if ( (action & FLAG_INCR) && (action & FLAG_DECR) ) delta = 0;

    TRACE("current %d, delta: %d\n", infoPtr->CurVal, delta);

    /* We must notify parent now to obtain permission */
    ni.iPos = infoPtr->CurVal;
    ni.iDelta = delta;
    ni.hdr.hwndFrom = infoPtr->Self;
    ni.hdr.idFrom   = GetWindowLongPtrW (infoPtr->Self, GWLP_ID);
    ni.hdr.code = UDN_DELTAPOS;
    if (!SendMessageW(infoPtr->Notify, WM_NOTIFY, (WPARAM)ni.hdr.idFrom, (LPARAM)&ni)) {
        /* Parent said: OK to adjust */

        /* Now adjust value with (maybe new) delta */
        if (UPDOWN_OffsetVal (infoPtr, ni.iDelta)) {
            TRACE("new %d, delta: %d\n", infoPtr->CurVal, ni.iDelta);

            /* Now take care about our buddy */
            UPDOWN_SetBuddyInt (infoPtr);
        }
    }

    /* Also, notify it. This message is sent in any case. */
    SendMessageW( infoPtr->Notify, (infoPtr->dwStyle & UDS_HORZ) ? WM_HSCROLL : WM_VSCROLL,
                  MAKELONG(SB_THUMBPOSITION, infoPtr->CurVal), (LPARAM)infoPtr->Self);
}

/***********************************************************************
 *           UPDOWN_IsEnabled
 *
 * Returns TRUE if it is enabled as well as its buddy (if any)
 *         FALSE otherwise
 */
static BOOL UPDOWN_IsEnabled (UPDOWN_INFO *infoPtr)
{
    if (!IsWindowEnabled(infoPtr->Self))
        return FALSE;
    if(infoPtr->Buddy)
        return IsWindowEnabled(infoPtr->Buddy);
    return TRUE;
}

/***********************************************************************
 *           UPDOWN_CancelMode
 *
 * Deletes any timers, releases the mouse and does  redraw if necessary.
 * If the control is not in "capture" mode, it does nothing.
 * If the control was not in cancel mode, it returns FALSE.
 * If the control was in cancel mode, it returns TRUE.
 */
static BOOL UPDOWN_CancelMode (UPDOWN_INFO *infoPtr)
{
    if (!(infoPtr->Flags & FLAG_PRESSED)) return FALSE;

    KillTimer (infoPtr->Self, TIMER_AUTOREPEAT);
    KillTimer (infoPtr->Self, TIMER_ACCEL);
    KillTimer (infoPtr->Self, TIMER_AUTOPRESS);

    if (GetCapture() == infoPtr->Self) {
        NMHDR hdr;
        hdr.hwndFrom = infoPtr->Self;
        hdr.idFrom   = GetWindowLongPtrW (infoPtr->Self, GWLP_ID);
        hdr.code = NM_RELEASEDCAPTURE;
        SendMessageW(infoPtr->Notify, WM_NOTIFY, hdr.idFrom, (LPARAM)&hdr);
        ReleaseCapture();
    }

    infoPtr->Flags &= ~FLAG_PRESSED;
    InvalidateRect (infoPtr->Self, NULL, FALSE);

    return TRUE;
}

/***********************************************************************
 *           UPDOWN_HandleMouseEvent
 *
 * Handle a mouse event for the updown.
 * 'pt' is the location of the mouse event in client or
 * windows coordinates.
 */
static void UPDOWN_HandleMouseEvent (UPDOWN_INFO *infoPtr, UINT msg, INT x, INT y)
{
    POINT pt = { x, y };
    RECT rect;
    int temp, arrow;

    TRACE("msg %04x point %s\n", msg, wine_dbgstr_point(&pt));

    switch(msg)
    {
        case WM_LBUTTONDOWN:  /* Initialise mouse tracking */

            /* If the buddy is an edit, will set focus to it */
            if (UPDOWN_IsBuddyEdit(infoPtr)) SetFocus(infoPtr->Buddy);

            /* Now see which one is the 'active' arrow */
            arrow = UPDOWN_GetArrowFromPoint (infoPtr, &rect, pt);

            /* Update the flags if we are in/out */
            infoPtr->Flags &= ~(FLAG_MOUSEIN | FLAG_ARROW);
            if (arrow)
                infoPtr->Flags |= FLAG_MOUSEIN | arrow;
            else
                if (infoPtr->AccelIndex != -1) infoPtr->AccelIndex = 0;

            if (infoPtr->Flags & FLAG_ARROW) {

                /* Update the CurVal if necessary */
                UPDOWN_GetBuddyInt (infoPtr);

                /* Set up the correct flags */
                infoPtr->Flags |= FLAG_PRESSED;

                /* repaint the control */
                InvalidateRect (infoPtr->Self, NULL, FALSE);

                /* process the click */
                temp = (infoPtr->AccelCount && infoPtr->AccelVect) ? infoPtr->AccelVect[0].nInc : 1;
                UPDOWN_DoAction (infoPtr, temp, infoPtr->Flags & FLAG_ARROW);

                /* now capture all mouse messages */
                SetCapture (infoPtr->Self);

                /* and startup the first timer */
                SetTimer(infoPtr->Self, TIMER_AUTOREPEAT, INITIAL_DELAY, 0);
            }
            break;

        case WM_MOUSEMOVE:
            /* save the flags to see if any got modified */
            temp = infoPtr->Flags;

            /* Now see which one is the 'active' arrow */
            arrow = UPDOWN_GetArrowFromPoint (infoPtr, &rect, pt);

            /* Update the flags if we are in/out */
            infoPtr->Flags &= ~(FLAG_MOUSEIN | FLAG_ARROW);
            if(arrow) {
                infoPtr->Flags |=  FLAG_MOUSEIN | arrow;
            } else {
                if(infoPtr->AccelIndex != -1) infoPtr->AccelIndex = 0;
            }

            /* If state changed, redraw the control */
            if(temp != infoPtr->Flags)
                 InvalidateRect (infoPtr->Self, &rect, FALSE);
            break;

        default:
            ERR("Impossible case (msg=%x)!\n", msg);
    }

}

/***********************************************************************
 *           UpDownWndProc
 */
static LRESULT WINAPI UpDownWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    UPDOWN_INFO *infoPtr = UPDOWN_GetInfoPtr (hwnd);
    int temp;

    TRACE("hwnd=%p msg=%04x wparam=%08x lparam=%08lx\n", hwnd, message, wParam, lParam);

    if (!infoPtr && (message != WM_CREATE))
        return DefWindowProcW (hwnd, message, wParam, lParam);

    switch(message)
    {
        case WM_CREATE:
            infoPtr = (UPDOWN_INFO*)Alloc (sizeof(UPDOWN_INFO));
            SetWindowLongPtrW (hwnd, 0, (DWORD_PTR)infoPtr);

            /* initialize the info struct */
            infoPtr->Self = hwnd;
            infoPtr->Notify = ((LPCREATESTRUCTW)lParam)->hwndParent;
            infoPtr->dwStyle = ((LPCREATESTRUCTW)lParam)->style;
            infoPtr->AccelCount = 0;
            infoPtr->AccelVect = 0;
            infoPtr->AccelIndex = -1;
            infoPtr->CurVal = 0;
            infoPtr->MinVal = 100;
            infoPtr->MaxVal = 0;
            infoPtr->Base  = 10; /* Default to base 10  */
            infoPtr->Buddy = 0;  /* No buddy window yet */
            infoPtr->Flags = 0;  /* And no flags        */

            SetWindowLongW (hwnd, GWL_STYLE, infoPtr->dwStyle & ~WS_BORDER);

            /* Do we pick the buddy win ourselves? */
            if (infoPtr->dwStyle & UDS_AUTOBUDDY)
                UPDOWN_SetBuddy (infoPtr, GetWindow (hwnd, GW_HWNDPREV));

            TRACE("UpDown Ctrl creation, hwnd=%p\n", hwnd);
            break;

        case WM_DESTROY:
            if(infoPtr->AccelVect) Free (infoPtr->AccelVect);

            if(infoPtr->Buddy) RemovePropW(infoPtr->Buddy, BUDDY_UPDOWN_HWND);

            Free (infoPtr);
            SetWindowLongPtrW (hwnd, 0, 0);
            TRACE("UpDown Ctrl destruction, hwnd=%p\n", hwnd);
            break;

        case WM_ENABLE:
            if (wParam) {
                infoPtr->dwStyle &= ~WS_DISABLED;
            } else {
                infoPtr->dwStyle |= WS_DISABLED;
                UPDOWN_CancelMode (infoPtr);
            }
            InvalidateRect (infoPtr->Self, NULL, FALSE);
            break;

        case WM_STYLECHANGED:
            if (wParam == GWL_STYLE) {
                infoPtr->dwStyle = ((LPSTYLESTRUCT)lParam)->styleNew;
                InvalidateRect (infoPtr->Self, NULL, FALSE);
            }
            break;

        case WM_TIMER:
           /* is this the auto-press timer? */
           if(wParam == TIMER_AUTOPRESS) {
                KillTimer(hwnd, TIMER_AUTOPRESS);
                infoPtr->Flags &= ~(FLAG_PRESSED | FLAG_ARROW);
                InvalidateRect(infoPtr->Self, NULL, FALSE);
           }

           /* if initial timer, kill it and start the repeat timer */
           if(wParam == TIMER_AUTOREPEAT) {
                KillTimer(hwnd, TIMER_AUTOREPEAT);
                /* if no accel info given, used default timer */
                if(infoPtr->AccelCount==0 || infoPtr->AccelVect==0) {
                    infoPtr->AccelIndex = -1;
                    temp = REPEAT_DELAY;
                } else {
                    infoPtr->AccelIndex = 0; /* otherwise, use it */
                    temp = infoPtr->AccelVect[infoPtr->AccelIndex].nSec * 1000 + 1;
                }
                SetTimer(hwnd, TIMER_ACCEL, temp, 0);
            }

            /* now, if the mouse is above us, do the thing...*/
            if(infoPtr->Flags & FLAG_MOUSEIN) {
                temp = infoPtr->AccelIndex == -1 ? 1 : infoPtr->AccelVect[infoPtr->AccelIndex].nInc;
                UPDOWN_DoAction(infoPtr, temp, infoPtr->Flags & FLAG_ARROW);

                if(infoPtr->AccelIndex != -1 && infoPtr->AccelIndex < infoPtr->AccelCount-1) {
                    KillTimer(hwnd, TIMER_ACCEL);
                    infoPtr->AccelIndex++; /* move to the next accel info */
                    temp = infoPtr->AccelVect[infoPtr->AccelIndex].nSec * 1000 + 1;
                    /* make sure we have at least 1ms intervals */
                    SetTimer(hwnd, TIMER_ACCEL, temp, 0);
                }
            }
            break;

        case WM_CANCELMODE:
          return UPDOWN_CancelMode (infoPtr);

        case WM_LBUTTONUP:
            if (GetCapture() != infoPtr->Self) break;

            if ( (infoPtr->Flags & FLAG_MOUSEIN) &&
                 (infoPtr->Flags & FLAG_ARROW) ) {

                SendMessageW( infoPtr->Notify,
                              (infoPtr->dwStyle & UDS_HORZ) ? WM_HSCROLL : WM_VSCROLL,
                              MAKELONG(SB_ENDSCROLL, infoPtr->CurVal),
                              (LPARAM)hwnd);
                if (UPDOWN_IsBuddyEdit(infoPtr))
                    SendMessageW(infoPtr->Buddy, EM_SETSEL, 0, MAKELONG(0, -1));
            }
            UPDOWN_CancelMode(infoPtr);
            break;

        case WM_LBUTTONDOWN:
        case WM_MOUSEMOVE:
            if(UPDOWN_IsEnabled(infoPtr))
                UPDOWN_HandleMouseEvent (infoPtr, message, (SHORT)LOWORD(lParam), (SHORT)HIWORD(lParam));
            break;

        case WM_KEYDOWN:
            if((infoPtr->dwStyle & UDS_ARROWKEYS) && UPDOWN_IsEnabled(infoPtr))
                return UPDOWN_KeyPressed(infoPtr, (int)wParam);
            break;

        case WM_PAINT:
            return UPDOWN_Paint (infoPtr, (HDC)wParam);

        case UDM_GETACCEL:
            if (wParam==0 && lParam==0) return infoPtr->AccelCount;
            if (wParam && lParam) {
                temp = min(infoPtr->AccelCount, wParam);
                memcpy((void *)lParam, infoPtr->AccelVect, temp*sizeof(UDACCEL));
                return temp;
            }
            return 0;

        case UDM_SETACCEL:
            TRACE("UDM_SETACCEL\n");

            if(infoPtr->AccelVect) {
                Free (infoPtr->AccelVect);
                infoPtr->AccelCount = 0;
                infoPtr->AccelVect  = 0;
            }
            if(wParam==0) return TRUE;
            infoPtr->AccelVect = Alloc (wParam*sizeof(UDACCEL));
            if(infoPtr->AccelVect == 0) return FALSE;
            memcpy(infoPtr->AccelVect, (void*)lParam, wParam*sizeof(UDACCEL));
            infoPtr->AccelCount = wParam;

            for (temp = 0; temp < wParam; temp++)
                TRACE("%d: nSec %u nInc %u\n", temp, infoPtr->AccelVect[temp].nSec, infoPtr->AccelVect[temp].nInc);

            return TRUE;

        case UDM_GETBASE:
            return infoPtr->Base;

        case UDM_SETBASE:
            TRACE("UpDown Ctrl new base(%d), hwnd=%p\n", wParam, hwnd);
            if (wParam==10 || wParam==16) {
                temp = infoPtr->Base;
                infoPtr->Base = wParam;
                return temp;
            }
            break;

        case UDM_GETBUDDY:
            return (LRESULT)infoPtr->Buddy;

        case UDM_SETBUDDY:
            return (LRESULT)UPDOWN_SetBuddy (infoPtr, (HWND)wParam);

        case UDM_GETPOS:
            temp = UPDOWN_GetBuddyInt (infoPtr);
            return MAKELONG(infoPtr->CurVal, temp ? 0 : 1);

        case UDM_SETPOS:
            temp = (short)LOWORD(lParam);
            TRACE("UpDown Ctrl new value(%d), hwnd=%p\n", temp, hwnd);
            if(!UPDOWN_InBounds(infoPtr, temp)) {
                if(temp < infoPtr->MinVal) temp = infoPtr->MinVal;
                if(temp > infoPtr->MaxVal) temp = infoPtr->MaxVal;
            }
            wParam = infoPtr->CurVal;
            infoPtr->CurVal = temp;
            UPDOWN_SetBuddyInt (infoPtr);
            return wParam;            /* return prev value */

        case UDM_GETRANGE:
            return MAKELONG(infoPtr->MaxVal, infoPtr->MinVal);

        case UDM_SETRANGE:
                                                     /* we must have:     */
            infoPtr->MaxVal = (short)(lParam);       /* UD_MINVAL <= Max <= UD_MAXVAL */
            infoPtr->MinVal = (short)HIWORD(lParam); /* UD_MINVAL <= Min <= UD_MAXVAL */
                                                     /* |Max-Min| <= UD_MAXVAL        */
            TRACE("UpDown Ctrl new range(%d to %d), hwnd=%p\n",
                  infoPtr->MinVal, infoPtr->MaxVal, hwnd);
            break;

        case UDM_GETRANGE32:
            if (wParam) *(LPINT)wParam = infoPtr->MinVal;
            if (lParam) *(LPINT)lParam = infoPtr->MaxVal;
            break;

        case UDM_SETRANGE32:
            infoPtr->MinVal = (INT)wParam;
            infoPtr->MaxVal = (INT)lParam;
            if (infoPtr->MaxVal <= infoPtr->MinVal)
                infoPtr->MaxVal = infoPtr->MinVal + 1;
            TRACE("UpDown Ctrl new range(%d to %d), hwnd=%p\n",
                  infoPtr->MinVal, infoPtr->MaxVal, hwnd);
            break;

        case UDM_GETPOS32:
            if ((LPBOOL)lParam != NULL) *((LPBOOL)lParam) = TRUE;
            return infoPtr->CurVal;

        case UDM_SETPOS32:
            if(!UPDOWN_InBounds(infoPtr, (int)lParam)) {
                if((int)lParam < infoPtr->MinVal) lParam = infoPtr->MinVal;
                if((int)lParam > infoPtr->MaxVal) lParam = infoPtr->MaxVal;
            }
            temp = infoPtr->CurVal;         /* save prev value   */
            infoPtr->CurVal = (int)lParam;  /* set the new value */
            UPDOWN_SetBuddyInt (infoPtr);
            return temp;                    /* return prev value */

        case UDM_GETUNICODEFORMAT:
            /* we lie a bit here, we're always using Unicode internally */
            return infoPtr->UnicodeFormat;

        case UDM_SETUNICODEFORMAT:
            /* do we really need to honour this flag? */
            temp = infoPtr->UnicodeFormat;
            infoPtr->UnicodeFormat = (BOOL)wParam;
            return temp;

        default:
            if ((message >= WM_USER) && (message < WM_APP))
                ERR("unknown msg %04x wp=%04x lp=%08lx\n", message, wParam, lParam);
            return DefWindowProcW (hwnd, message, wParam, lParam);
    }

    return 0;
}

/***********************************************************************
 *              UPDOWN_Register [Internal]
 *
 * Registers the updown window class.
 */
void UPDOWN_Register(void)
{
    WNDCLASSW wndClass;

    ZeroMemory( &wndClass, sizeof( WNDCLASSW ) );
    wndClass.style         = CS_GLOBALCLASS | CS_VREDRAW | CS_HREDRAW;
    wndClass.lpfnWndProc   = UpDownWindowProc;
    wndClass.cbClsExtra    = 0;
    wndClass.cbWndExtra    = sizeof(UPDOWN_INFO*);
    wndClass.hCursor       = LoadCursorW( 0, (LPWSTR)IDC_ARROW );
    wndClass.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
    wndClass.lpszClassName = UPDOWN_CLASSW;

    RegisterClassW( &wndClass );
}


/***********************************************************************
 *              UPDOWN_Unregister       [Internal]
 *
 * Unregisters the updown window class.
 */
void UPDOWN_Unregister (void)
{
    UnregisterClassW (UPDOWN_CLASSW, NULL);
}