COLOR.CPP

/*========================================================================== 
 * 
 *  Copyright (C) 1995, 1996 Microsoft Corporation. All Rights Reserved. 
 * 
 *  File: color.cpp 
 * 
 ***************************************************************************/ 
 
#include <d3drmwin.h> 
#include "viewer.h" 
#include <windows.h> 
#include <string.h> 
#include <commdlg.h> 
#include <d3drm.h> 
 
static DWORD dwNewAlpha; 
 
VOID 
setAlphaDialog(HWND hdlg, DWORD dwVal) 
{ 
    TCHAR szVal[5]; 
 
    wsprintf(szVal, "%d", dwVal); 
    SendDlgItemMessage(hdlg, COLOR_ALPHA, EM_SETSEL, 
       (WPARAM)0, (LPARAM)-1); 
    SendDlgItemMessage(hdlg, COLOR_ALPHA, EM_REPLACESEL, 
       (WPARAM)FALSE, (LPARAM)szVal); 
} 
 
#define COLOR_OK0 
#define COLOR_BADVAL1 
#define COLOR_NONEWVAL2 
 
DWORD 
getAlphaFromDialog(HWND hdlg, LPDWORD pdwAlpha) 
{ 
    WORD cchAlpha; 
    TCHAR szAlpha[5]; 
    TCHAR* pszStop; 
    DWORD dwAlpha; 
 
    cchAlpha = (WORD)SendDlgItemMessage(hdlg, COLOR_ALPHA, 
EM_LINELENGTH, 
(WPARAM)0, (LPARAM)0); 
    if (cchAlpha > 3) 
    { 
return (COLOR_BADVAL); 
    } 
 
    if (cchAlpha == 0) 
    { 
return (COLOR_NONEWVAL); 
    } 
 
    *szAlpha = (char)cchAlpha; 
    SendDlgItemMessage(hdlg, COLOR_ALPHA, EM_GETLINE, 
       (WPARAM)0, (LPARAM)szAlpha); 
    szAlpha[cchAlpha] = '\0'; 
    pszStop = &szAlpha[cchAlpha]; 
    dwAlpha = strtoul(szAlpha, &pszStop, 10); 
    if (dwAlpha > 255) 
    { 
return (COLOR_BADVAL); 
    } 
 
    *pdwAlpha = dwAlpha; 
 
    return (COLOR_OK); 
} 
 
UINT APIENTRY CCHookProc(HWND hdlg, UINT uiMsg, WPARAM wParam, LPARAM lParam) 
{ 
    DWORD dwAlpha; 
    DWORD dwRet; 
 
    switch (uiMsg) 
    { 
case WM_INITDIALOG: 
    setAlphaDialog(hdlg, dwNewAlpha); 
    break; 
 
case WM_COMMAND: 
    if (wParam == IDOK) 
    { 
/* 
 * Get the Alpha Value 
 */ 
dwRet = getAlphaFromDialog(hdlg, &dwAlpha); 
switch (dwRet) 
{ 
    case COLOR_NONEWVAL: 
    break; 
    case COLOR_OK: 
    dwNewAlpha = dwAlpha; 
break; 
    case COLOR_BADVAL: 
setAlphaDialog(hdlg, dwNewAlpha); 
break; 
} 
    } 
 
    break; 
    } 
 
    return 0; /* Always give default behaviour */ 
} 
 
 
int ChooseNewColor(HWND win, D3DCOLOR* current) 
{ 
    CHOOSECOLOR cc; 
    COLORREF clr; 
    COLORREF aclrCust[16]; 
    int i; 
 
    for (i = 0; i < 16; i++) 
aclrCust[i] = RGB(255, 255, 255); 
 
    clr = 
RGB 
(   (int) (255 * D3DRMColorGetRed(*current)), 
    (int) (255 * D3DRMColorGetGreen(*current)), 
    (int) (255 * D3DRMColorGetBlue(*current)) 
); 
 
    memset(&cc, 0, sizeof(CHOOSECOLOR)); 
    cc.lStructSize = sizeof(CHOOSECOLOR); 
    cc.hwndOwner = win; 
    cc.hInstance = (HWND)GetWindowLong(win, GWL_HINSTANCE); 
    cc.rgbResult = clr; 
    cc.lpCustColors = aclrCust; 
    cc.Flags = CC_RGBINIT|CC_FULLOPEN|CC_ENABLETEMPLATE|CC_ENABLEHOOK; 
    cc.lpfnHook = CCHookProc; 
    cc.lpTemplateName = "ViewerChooseColor"; 
    dwNewAlpha = (DWORD) (255 * D3DRMColorGetAlpha(*current)); 
 
    if (ChooseColor(&cc)) 
    {*current = 
    D3DRMCreateColorRGBA 
    (D3DVAL(GetRValue(cc.rgbResult) / D3DVAL(255.0)), 
D3DVAL(GetGValue(cc.rgbResult) / D3DVAL(255.0)), 
D3DVAL(GetBValue(cc.rgbResult) / D3DVAL(255.0)), 
D3DVAL(dwNewAlpha / D3DVAL(255.0)) 
    ); 
return TRUE; 
    } 
    else return FALSE; 
}