hotkey.c 14.2 KB
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/*
 * Hotkey control
 *
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 * Copyright 1998, 1999 Eric Kohl
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 * Copyright 2002 Gyorgy 'Nog' Jeney
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 * Copyright 2004 Robert Shearman
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 *
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 * 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
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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 *
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 * This code was audited for completeness against the documented features
 * of Comctl32.dll version 6.0 on Sep. 21, 2004, by Robert Shearman.
 * 
 * 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.
 *
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 */

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#include <stdarg.h>
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#include <string.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
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#include "commctrl.h"
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#include "comctl32.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(hotkey);
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typedef struct tagHOTKEY_INFO
{
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    HWND  hwndSelf;
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    HWND  hwndNotify;
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    HFONT hFont;
    BOOL  bFocus;
    INT   nHeight;
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    WORD  HotKey;
    WORD  InvComb;
    WORD  InvMod;
    BYTE  CurrMod;
    INT   CaretPos;
    DWORD ScanCode;
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    WCHAR strNone[15]; /* hope it's long enough ... */
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} HOTKEY_INFO;
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static const WCHAR HOTKEY_plussep[] = { ' ', '+', ' ' };
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static LRESULT HOTKEY_SetFont (HOTKEY_INFO *infoPtr, HFONT hFont, BOOL redraw);
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#define IsOnlySet(flags) (infoPtr->CurrMod == (flags))
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static BOOL
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HOTKEY_IsCombInv(const HOTKEY_INFO *infoPtr)
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{
    TRACE("(infoPtr=%p)\n", infoPtr);
    if((infoPtr->InvComb & HKCOMB_NONE) && !infoPtr->CurrMod)
	return TRUE;
    if((infoPtr->InvComb & HKCOMB_S) && IsOnlySet(HOTKEYF_SHIFT))
	return TRUE;
    if((infoPtr->InvComb & HKCOMB_C) && IsOnlySet(HOTKEYF_CONTROL))
	return TRUE;
    if((infoPtr->InvComb & HKCOMB_A) && IsOnlySet(HOTKEYF_ALT))
	return TRUE;
    if((infoPtr->InvComb & HKCOMB_SC) && 
       IsOnlySet(HOTKEYF_SHIFT | HOTKEYF_CONTROL))
	return TRUE;
    if((infoPtr->InvComb & HKCOMB_SA) && IsOnlySet(HOTKEYF_SHIFT | HOTKEYF_ALT))
	return TRUE;
    if((infoPtr->InvComb & HKCOMB_CA) && 
       IsOnlySet(HOTKEYF_CONTROL | HOTKEYF_ALT))
	return TRUE;
    if((infoPtr->InvComb & HKCOMB_SCA) && 
       IsOnlySet(HOTKEYF_SHIFT | HOTKEYF_CONTROL | HOTKEYF_ALT))
	return TRUE;

    TRACE("() Modifiers are valid\n");
    return FALSE;
}
#undef IsOnlySet
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static void
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HOTKEY_DrawHotKey(HOTKEY_INFO *infoPtr, HDC hdc, LPCWSTR KeyName, WORD NameLen)
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{
    SIZE TextSize;
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    INT nXStart, nYStart;
    COLORREF clrOldText, clrOldBk;
    HFONT hFontOld;
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    /* Make a gap from the frame */
    nXStart = GetSystemMetrics(SM_CXBORDER);
    nYStart = GetSystemMetrics(SM_CYBORDER);

    hFontOld = SelectObject(hdc, infoPtr->hFont);
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    if (GetWindowLongW(infoPtr->hwndSelf, GWL_STYLE) & WS_DISABLED)
    {
        clrOldText = SetTextColor(hdc, comctl32_color.clrGrayText);
        clrOldBk = SetBkColor(hdc, comctl32_color.clrBtnFace);
    }
    else
    {
        clrOldText = SetTextColor(hdc, comctl32_color.clrWindowText);
        clrOldBk = SetBkColor(hdc, comctl32_color.clrWindow);
    }
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    TextOutW(hdc, nXStart, nYStart, KeyName, NameLen);

    /* Get the text width for the caret */
    GetTextExtentPoint32W(hdc, KeyName, NameLen, &TextSize);
    infoPtr->CaretPos = nXStart + TextSize.cx;

    SetBkColor(hdc, clrOldBk);
    SetTextColor(hdc, clrOldText);
    SelectObject(hdc, hFontOld);

    /* position the caret */
    SetCaretPos(infoPtr->CaretPos, nYStart);
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}
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/* Draw the names of the keys in the control */
static void 
HOTKEY_Refresh(HOTKEY_INFO *infoPtr, HDC hdc)
{
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    WCHAR KeyName[64];
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    WORD NameLen = 0;
    BYTE Modifier;

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    TRACE("(infoPtr=%p hdc=%p)\n", infoPtr, hdc);
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    if(!infoPtr->CurrMod && !infoPtr->HotKey) {
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	HOTKEY_DrawHotKey (infoPtr, hdc, infoPtr->strNone, 4);
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	return;
    }
	
    if(infoPtr->HotKey)
	Modifier = HIBYTE(infoPtr->HotKey);
    else if(HOTKEY_IsCombInv(infoPtr)) 
	Modifier = infoPtr->InvMod;
    else
	Modifier = infoPtr->CurrMod;

    if(Modifier & HOTKEYF_CONTROL) {
	GetKeyNameTextW(MAKELPARAM(0, MapVirtualKeyW(VK_CONTROL, 0)),
	                          KeyName, 64);
        NameLen = lstrlenW(KeyName);
	memcpy(&KeyName[NameLen], HOTKEY_plussep, sizeof(HOTKEY_plussep));
	NameLen += 3;
    }
    if(Modifier & HOTKEYF_SHIFT) {
	GetKeyNameTextW(MAKELPARAM(0, MapVirtualKeyW(VK_SHIFT, 0)),
	                           &KeyName[NameLen], 64 - NameLen);
	NameLen = lstrlenW(KeyName);
	memcpy(&KeyName[NameLen], HOTKEY_plussep, sizeof(HOTKEY_plussep));
	NameLen += 3;
    }
    if(Modifier & HOTKEYF_ALT) {
	GetKeyNameTextW(MAKELPARAM(0, MapVirtualKeyW(VK_MENU, 0)),
	                           &KeyName[NameLen], 64 - NameLen);
	NameLen = lstrlenW(KeyName);
	memcpy(&KeyName[NameLen], HOTKEY_plussep, sizeof(HOTKEY_plussep));
	NameLen += 3;
    }

    if(infoPtr->HotKey) {
	GetKeyNameTextW(infoPtr->ScanCode, &KeyName[NameLen], 64 - NameLen);
	NameLen = lstrlenW(KeyName);
    }
    else
	KeyName[NameLen] = 0;
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    HOTKEY_DrawHotKey (infoPtr, hdc, KeyName, NameLen);
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}

static void
HOTKEY_Paint(HOTKEY_INFO *infoPtr, HDC hdc)
{
    if (hdc)
	HOTKEY_Refresh(infoPtr, hdc);
    else {
	PAINTSTRUCT ps;
	hdc = BeginPaint (infoPtr->hwndSelf, &ps);
	HOTKEY_Refresh (infoPtr, hdc);
	EndPaint (infoPtr->hwndSelf, &ps);
    }
}

static LRESULT
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HOTKEY_GetHotKey(const HOTKEY_INFO *infoPtr)
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{
    TRACE("(infoPtr=%p) Modifiers: 0x%x, Virtual Key: %d\n", infoPtr, 
          HIBYTE(infoPtr->HotKey), LOBYTE(infoPtr->HotKey));
    return (LRESULT)infoPtr->HotKey;
}

static void
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HOTKEY_SetHotKey(HOTKEY_INFO *infoPtr, WORD hotKey)
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{
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    infoPtr->HotKey = hotKey;
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    infoPtr->ScanCode = 
        MAKELPARAM(0, MapVirtualKeyW(LOBYTE(infoPtr->HotKey), 0));
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    TRACE("(infoPtr=%p hotKey=%x) Modifiers: 0x%x, Virtual Key: %d\n", infoPtr,
          hotKey, HIBYTE(infoPtr->HotKey), LOBYTE(infoPtr->HotKey));
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    InvalidateRect(infoPtr->hwndSelf, NULL, TRUE);
}

static void 
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HOTKEY_SetRules(HOTKEY_INFO *infoPtr, WORD invComb, WORD invMod)
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{
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    infoPtr->InvComb = invComb;
    infoPtr->InvMod = invMod;
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    TRACE("(infoPtr=%p) Invalid Modifers: 0x%x, If Invalid: 0x%x\n", infoPtr,
          infoPtr->InvComb, infoPtr->InvMod);
}

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static LRESULT
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HOTKEY_Create (HOTKEY_INFO *infoPtr, const CREATESTRUCTW *lpcs)
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{
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    infoPtr->hwndNotify = lpcs->hwndParent;
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    HOTKEY_SetFont(infoPtr, GetStockObject(SYSTEM_FONT), 0);
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    return 0;
}


static LRESULT
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HOTKEY_Destroy (HOTKEY_INFO *infoPtr)
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{
    /* free hotkey info data */
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    SetWindowLongPtrW (infoPtr->hwndSelf, 0, 0);
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    Free (infoPtr);
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    return 0;
}


static LRESULT
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HOTKEY_EraseBackground (const HOTKEY_INFO *infoPtr, HDC hdc)
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{
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    HBRUSH hBrush, hSolidBrush = NULL;
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    RECT   rc;
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    if (GetWindowLongW(infoPtr->hwndSelf, GWL_STYLE) & WS_DISABLED)
        hBrush = hSolidBrush = CreateSolidBrush(comctl32_color.clrBtnFace);
    else
    {
        hBrush = (HBRUSH)SendMessageW(infoPtr->hwndNotify, WM_CTLCOLOREDIT,
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                                      (WPARAM)hdc, (LPARAM)infoPtr->hwndSelf);
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        if (!hBrush)
            hBrush = hSolidBrush = CreateSolidBrush(comctl32_color.clrWindow);
    }

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    GetClientRect (infoPtr->hwndSelf, &rc);
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    FillRect (hdc, &rc, hBrush);
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    if (hSolidBrush)
        DeleteObject(hSolidBrush);

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    return -1;
}


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static inline LRESULT
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HOTKEY_GetFont (const HOTKEY_INFO *infoPtr)
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{
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    return (LRESULT)infoPtr->hFont;
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}

static LRESULT
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HOTKEY_KeyDown (HOTKEY_INFO *infoPtr, DWORD key, DWORD flags)
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{
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    WORD wOldHotKey;
    BYTE bOldMod;

    if (GetWindowLongW(infoPtr->hwndSelf, GWL_STYLE) & WS_DISABLED)
        return 0;

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    TRACE("() Key: %d\n", key);
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    wOldHotKey = infoPtr->HotKey;
    bOldMod = infoPtr->CurrMod;

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    /* If any key is Pressed, we have to reset the hotkey in the control */
    infoPtr->HotKey = 0;
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    switch (key)
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    {
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	case VK_RETURN:
	case VK_TAB:
	case VK_SPACE:
	case VK_DELETE:
	case VK_ESCAPE:
	case VK_BACK:
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	    InvalidateRect(infoPtr->hwndSelf, NULL, TRUE);
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	    return DefWindowProcW (infoPtr->hwndSelf, WM_KEYDOWN, key, flags);
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	case VK_SHIFT:
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	    infoPtr->CurrMod |= HOTKEYF_SHIFT;
	    break;
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	case VK_CONTROL:
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	    infoPtr->CurrMod |= HOTKEYF_CONTROL;
	    break;
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	case VK_MENU:
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	    infoPtr->CurrMod |= HOTKEYF_ALT;
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	    break;

	default:
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	    if(HOTKEY_IsCombInv(infoPtr))
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	        infoPtr->HotKey = MAKEWORD(key, infoPtr->InvMod);
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	    else
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	        infoPtr->HotKey = MAKEWORD(key, infoPtr->CurrMod);
	    infoPtr->ScanCode = flags;
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	    break;
    }

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    if ((wOldHotKey != infoPtr->HotKey) || (bOldMod != infoPtr->CurrMod))
    {
        InvalidateRect(infoPtr->hwndSelf, NULL, TRUE);

        /* send EN_CHANGE notification */
        SendMessageW(infoPtr->hwndNotify, WM_COMMAND,
            MAKEWPARAM(GetDlgCtrlID(infoPtr->hwndSelf), EN_CHANGE),
            (LPARAM)infoPtr->hwndSelf);
    }

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    return 0;
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}


static LRESULT
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HOTKEY_KeyUp (HOTKEY_INFO *infoPtr, DWORD key)
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{
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    BYTE bOldMod;

    if (GetWindowLongW(infoPtr->hwndSelf, GWL_STYLE) & WS_DISABLED)
        return 0;

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    TRACE("() Key: %d\n", key);
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    bOldMod = infoPtr->CurrMod;

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    switch (key)
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    {
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	case VK_SHIFT:
	    infoPtr->CurrMod &= ~HOTKEYF_SHIFT;
	    break;
	case VK_CONTROL:
	    infoPtr->CurrMod &= ~HOTKEYF_CONTROL;
	    break;
	case VK_MENU:
	    infoPtr->CurrMod &= ~HOTKEYF_ALT;
	    break;
	default:
	    return 1;
    }
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    if (bOldMod != infoPtr->CurrMod)
    {
        InvalidateRect(infoPtr->hwndSelf, NULL, TRUE);

        /* send EN_CHANGE notification */
        SendMessageW(infoPtr->hwndNotify, WM_COMMAND,
            MAKEWPARAM(GetDlgCtrlID(infoPtr->hwndSelf), EN_CHANGE),
            (LPARAM)infoPtr->hwndSelf);
    }
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    return 0;
}


static LRESULT
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HOTKEY_KillFocus (HOTKEY_INFO *infoPtr)
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{
    infoPtr->bFocus = FALSE;
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    DestroyCaret ();
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    return 0;
}


static LRESULT
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HOTKEY_LButtonDown (const HOTKEY_INFO *infoPtr)
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{
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    if (!(GetWindowLongW(infoPtr->hwndSelf, GWL_STYLE) & WS_DISABLED))
        SetFocus (infoPtr->hwndSelf);
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    return 0;
}


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static inline LRESULT
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HOTKEY_NCCreate (HWND hwnd, const CREATESTRUCTW *lpcs)
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{
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    HOTKEY_INFO *infoPtr;
    DWORD dwExStyle = GetWindowLongW (hwnd, GWL_EXSTYLE);
    SetWindowLongW (hwnd, GWL_EXSTYLE, 
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                    dwExStyle | WS_EX_CLIENTEDGE);
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    /* allocate memory for info structure */
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    infoPtr = Alloc (sizeof(HOTKEY_INFO));
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    SetWindowLongPtrW(hwnd, 0, (DWORD_PTR)infoPtr);

    /* initialize info structure */
    infoPtr->HotKey = infoPtr->InvComb = infoPtr->InvMod = infoPtr->CurrMod = 0;
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    infoPtr->CaretPos = GetSystemMetrics(SM_CXBORDER);
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    infoPtr->hwndSelf = hwnd;
    LoadStringW(COMCTL32_hModule, HKY_NONE, infoPtr->strNone, 15);

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    return DefWindowProcW (infoPtr->hwndSelf, WM_NCCREATE, 0, (LPARAM)lpcs);
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}

static LRESULT
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HOTKEY_SetFocus (HOTKEY_INFO *infoPtr)
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{
    infoPtr->bFocus = TRUE;

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    CreateCaret (infoPtr->hwndSelf, NULL, 1, infoPtr->nHeight);
    SetCaretPos (infoPtr->CaretPos, GetSystemMetrics(SM_CYBORDER));
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    ShowCaret (infoPtr->hwndSelf);
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    return 0;
}


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static LRESULT
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HOTKEY_SetFont (HOTKEY_INFO *infoPtr, HFONT hFont, BOOL redraw)
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{
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    TEXTMETRICW tm;
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    HDC hdc;
    HFONT hOldFont = 0;
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    infoPtr->hFont = hFont;
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    hdc = GetDC (infoPtr->hwndSelf);
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    if (infoPtr->hFont)
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	hOldFont = SelectObject (hdc, infoPtr->hFont);
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    GetTextMetricsW (hdc, &tm);
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    infoPtr->nHeight = tm.tmHeight;

    if (infoPtr->hFont)
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	SelectObject (hdc, hOldFont);
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    ReleaseDC (infoPtr->hwndSelf, hdc);
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    if (redraw)
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	InvalidateRect (infoPtr->hwndSelf, NULL, TRUE);
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    return 0;
}

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static LRESULT WINAPI
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HOTKEY_WindowProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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    HOTKEY_INFO *infoPtr = (HOTKEY_INFO *)GetWindowLongPtrW (hwnd, 0);
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    TRACE("hwnd=%p msg=%x wparam=%lx lparam=%lx\n", hwnd, uMsg, wParam, lParam);
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    if (!infoPtr && (uMsg != WM_NCCREATE))
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        return DefWindowProcW (hwnd, uMsg, wParam, lParam);
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    switch (uMsg)
    {
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	case HKM_GETHOTKEY:
	    return HOTKEY_GetHotKey (infoPtr);
	case HKM_SETHOTKEY:
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	    HOTKEY_SetHotKey (infoPtr, (WORD)wParam);
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	    break;
	case HKM_SETRULES:
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            HOTKEY_SetRules (infoPtr, (WORD)wParam, (WORD)lParam);
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	    break;
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	case WM_CHAR:
	case WM_SYSCHAR:
	    return HOTKEY_KeyDown (infoPtr, MapVirtualKeyW(LOBYTE(HIWORD(lParam)), 1), lParam);
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	case WM_CREATE:
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	    return HOTKEY_Create (infoPtr, (LPCREATESTRUCTW)lParam);
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	case WM_DESTROY:
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	    return HOTKEY_Destroy (infoPtr);
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	case WM_ERASEBKGND:
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	    return HOTKEY_EraseBackground (infoPtr, (HDC)wParam);
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	case WM_GETDLGCODE:
	    return DLGC_WANTCHARS | DLGC_WANTARROWS;

	case WM_GETFONT:
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	    return HOTKEY_GetFont (infoPtr);
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	case WM_KEYDOWN:
	case WM_SYSKEYDOWN:
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	    return HOTKEY_KeyDown (infoPtr, wParam, lParam);
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	case WM_KEYUP:
	case WM_SYSKEYUP:
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	    return HOTKEY_KeyUp (infoPtr, wParam);
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	case WM_KILLFOCUS:
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	    return HOTKEY_KillFocus (infoPtr);
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	case WM_LBUTTONDOWN:
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	    return HOTKEY_LButtonDown (infoPtr);
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	case WM_NCCREATE:
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	    return HOTKEY_NCCreate (hwnd, (LPCREATESTRUCTW)lParam);
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	case WM_PRINTCLIENT:
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	case WM_PAINT:
	    HOTKEY_Paint(infoPtr, (HDC)wParam);
	    return 0;
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	case WM_SETFOCUS:
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	    return HOTKEY_SetFocus (infoPtr);
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	case WM_SETFONT:
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	    return HOTKEY_SetFont (infoPtr, (HFONT)wParam, LOWORD(lParam));
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	default:
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	    if ((uMsg >= WM_USER) && (uMsg < WM_APP) && !COMCTL32_IsReflectedMessage(uMsg))
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		ERR("unknown msg %04x wp=%08lx lp=%08lx\n",
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		     uMsg, wParam, lParam);
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	    return DefWindowProcW (hwnd, uMsg, wParam, lParam);
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    }
    return 0;
}


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void
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HOTKEY_Register (void)
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{
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    WNDCLASSW wndClass;
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    ZeroMemory (&wndClass, sizeof(WNDCLASSW));
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    wndClass.style         = CS_GLOBALCLASS;
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    wndClass.lpfnWndProc   = HOTKEY_WindowProc;
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    wndClass.cbClsExtra    = 0;
    wndClass.cbWndExtra    = sizeof(HOTKEY_INFO *);
    wndClass.hCursor       = 0;
    wndClass.hbrBackground = 0;
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    wndClass.lpszClassName = HOTKEY_CLASSW;
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    RegisterClassW (&wndClass);
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}
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void
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HOTKEY_Unregister (void)
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{
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    UnregisterClassW (HOTKEY_CLASSW, NULL);
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}