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windows-server-2003/multimedia/media/avi/mciwnd/preview.c

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/****************************************************************************
*
* MODULE : PREVIEW.C
*
****************************************************************************/
#include <windows.h>
#include <mmsystem.h>
#include <commdlg.h>
#include <win32.h>
#include <vfw.h>
#define SQUAWKNUMZ(num) #num
#define SQUAWKNUM(num) SQUAWKNUMZ(num)
#define SQUAWK __FILE__ "(" SQUAWKNUM(__LINE__) ") :squawk: "
typedef struct {
BOOL bUnicode;
HWND hwnd; // common dialog handle.
LPOPENFILENAME pofn;
LPARAM lCustData; // hold old value
DWORD Flags;
LPOFNHOOKPROC lpfnHook;
RECT rcPreview;
RECT rcImage;
RECT rcText;
HWND hwndMci;
HFONT hfont;
HPALETTE hpal;
HANDLE hdib;
TCHAR Title[128];
} PreviewStuff, FAR *PPreviewStuff;
#define PREVIEW_PROP TEXT("PreviewStuff")
#ifdef _WIN32
#define SetPreviewStuff(hwnd, p) SetProp(hwnd,PREVIEW_PROP,(LPVOID)(p))
#define GetPreviewStuff(hwnd) (PPreviewStuff)(LPVOID)GetProp(hwnd, PREVIEW_PROP)
#define RemovePreviewStuff(hwnd) RemoveProp(hwnd,PREVIEW_PROP)
#else
#define SetPreviewStuff(hwnd, p) SetProp(hwnd,PREVIEW_PROP,HIWORD(p))
#define GetPreviewStuff(hwnd) (PPreviewStuff)MAKELONG(0, GetProp(hwnd, PREVIEW_PROP))
#define RemovePreviewStuff(hwnd) RemoveProp(hwnd,PREVIEW_PROP)
#define CharNext AnsiNext
#define CharPrev AnsiPrev
#define CharUpperBuff AnsiUpperBuff
#define CharLower AnsiLower
#endif
/***************************************************************************
*
****************************************************************************/
STATICFN BOOL PreviewOpen (HWND hwnd, LPOPENFILENAME pofn);
STATICFN BOOL PreviewFile (PPreviewStuff p, LPTSTR szFile);
STATICFN BOOL PreviewPaint(PPreviewStuff p);
STATICFN BOOL PreviewSize (PPreviewStuff p);
STATICFN BOOL PreviewClose(PPreviewStuff p);
STATICFN HANDLE GetRiffDisp(LPTSTR lpszFile, LPTSTR szText, int iLen);
/***************************************************************************
*
****************************************************************************/
STATICFN BOOL PreviewOpen(HWND hwnd, LPOPENFILENAME pofn)
{
LOGFONT lf;
PPreviewStuff p;
RECT rc;
p = (LPVOID)pofn->lCustData;
pofn->lCustData = p->lCustData;
SetPreviewStuff(hwnd, p);
p->hwnd = hwnd;
p->pofn = pofn;
//
// create a MCI window for preview.
//
p->hwndMci = MCIWndCreate(p->hwnd, NULL,
// MCIWNDF_NOAUTOSIZEWINDOW |
// MCIWNDF_NOPLAYBAR |
// MCIWNDF_NOAUTOSIZEMOVIE |
MCIWNDF_NOMENU |
// MCIWNDF_SHOWNAME |
// MCIWNDF_SHOWPOS |
// MCIWNDF_SHOWMODE |
// MCIWNDF_RECORD |
MCIWNDF_NOERRORDLG |
WS_CHILD | WS_BORDER,
NULL);
//
// locate the preview in the lower corner of the dialog (below the
// cancel button)
//
GetClientRect(hwnd, &p->rcPreview);
GetWindowRect(GetDlgItem(hwnd, IDCANCEL), &rc);
ScreenToClient(hwnd, (LPPOINT)&rc);
ScreenToClient(hwnd, (LPPOINT)&rc+1);
// The open space we're allowed to use in the dialog is different in NT and on
// Win31. Under NT there is a network button at the bottom of the dialog on
// the right hand side, so we use the area from just under the CANCEL button to
// a little more than 1 button height from the bottom of the dialog.
// Under Win31, the network button is under CANCEL, so we use the area a little
// over one button height under CANCEL, to just about the bottom of the dialog.
#ifdef _WIN32
if (1)
#else
if (GetWinFlags() & WF_WINNT)
#endif
{
p->rcPreview.top = rc.bottom + 4;
p->rcPreview.left = rc.left;
p->rcPreview.right = rc.right;
p->rcPreview.bottom -= (rc.bottom - rc.top) + 12;
} else {
p->rcPreview.top = rc.bottom + (rc.bottom - rc.top) + 12;
p->rcPreview.left = rc.left;
p->rcPreview.right = rc.right;
p->rcPreview.bottom -= 4; // leave a little room at the bottom
}
//
// create a font to use.
//
SystemParametersInfo(SPI_GETICONTITLELOGFONT, sizeof(lf), (LPVOID)&lf, 0);
p->hfont = CreateFontIndirect(&lf);
return TRUE;
}
/***************************************************************************
*
****************************************************************************/
STATICFN BOOL PreviewClose(PPreviewStuff p)
{
if (p == NULL)
return FALSE;
PreviewFile(p, NULL);
RemovePreviewStuff(p->hwnd);
if (p->hfont)
{
DeleteObject(p->hfont);
p->hfont = NULL ;
}
if (p->hwndMci)
{
MCIWndDestroy(p->hwndMci);
p->hwndMci = NULL ;
}
return TRUE;
}
/***************************************************************************
*
****************************************************************************/
#define SLASH(c) ((c) == TEXT('/') || (c) == TEXT('\\'))
STATICFN LPTSTR NiceName(LPTSTR szPath)
{
LPTSTR sz;
LPTSTR lpsztmp;
for (sz=szPath; *sz; sz++)
;
for (; sz>szPath && !SLASH(*sz) && *sz!=TEXT(':'); sz =CharPrev(szPath, sz))
;
if(sz>szPath) sz = CharNext(sz) ;
for(lpsztmp = sz; *lpsztmp && *lpsztmp != TEXT('.'); lpsztmp = CharNext(lpsztmp))
;
*lpsztmp = TEXT('\0');
CharLower(sz);
CharUpperBuff(sz, 1);
return sz;
}
/***************************************************************************
*
****************************************************************************/
STATICFN BOOL PreviewFile(PPreviewStuff p, LPTSTR szFile)
{
if (p == NULL || !p->hwndMci)
return FALSE;
p->Title[0] = 0;
ShowWindow(p->hwndMci, SW_HIDE);
MCIWndClose(p->hwndMci);
if (p->hdib)
GlobalFree(p->hdib);
if (p->hpal)
DeleteObject(p->hpal);
p->hdib = NULL;
p->hpal = NULL;
PreviewPaint(p);
if (szFile == NULL)
return TRUE;
if (MCIWndOpen(p->hwndMci, szFile, 0) == 0)
{
lstrcpy(p->Title, NiceName(szFile));
if (MCIWndUseTime(p->hwndMci) == 0)
{
LONG len;
UINT min,sec;
len = MCIWndGetLength(p->hwndMci);
if (len > 0)
{
#define ONE_HOUR (60ul*60ul*1000ul)
#define ONE_MINUTE (60ul*1000ul)
#define ONE_SECOND (1000ul)
min = (UINT)(len / ONE_MINUTE) % 60;
sec = (UINT)(len / ONE_SECOND) % 60;
wsprintf(p->Title + lstrlen(p->Title), TEXT(" (%02d:%02d)"), min, sec);
}
}
}
PreviewSize(p);
PreviewPaint(p);
return TRUE;
}
/***************************************************************************
*
****************************************************************************/
STATICFN BOOL PreviewSize(PPreviewStuff p)
{
RECT rc;
RECT rcImage;
RECT rcText;
RECT rcPreview;
HDC hdc;
int dx;
int dy;
int dyPlayBar;
SetRectEmpty(&p->rcText);
SetRectEmpty(&p->rcImage);
//
// if nothing to do clear it.
//
if (p->Title[0] == 0 && p->hdib == NULL)
return FALSE;
rcPreview = p->rcPreview;
//
// compute the text rect, using DrawText
//
hdc = GetDC(p->hwnd);
SelectObject(hdc, p->hfont);
rcText = rcPreview;
rcText.bottom = rcText.top;
DrawText(hdc, p->Title, -1, &rcText, DT_CALCRECT|DT_LEFT|DT_WORDBREAK);
ReleaseDC(p->hwnd, hdc);
//
// compute the image size
//
MCIWndChangeStyles(p->hwndMci, MCIWNDF_NOPLAYBAR, MCIWNDF_NOPLAYBAR);
GetWindowRect(p->hwndMci, &rc);
dx = rc.right - rc.left;
dy = rc.bottom - rc.top;
MCIWndChangeStyles(p->hwndMci, MCIWNDF_NOPLAYBAR, 0);
GetWindowRect(p->hwndMci, &rc);
dyPlayBar = rc.bottom - rc.top - dy;
rcImage = rcPreview;
rcImage.bottom -= dyPlayBar;
//
// if wider than preview area scale to fit
//
if (dx > rcImage.right - rcImage.left)
{
rcImage.bottom = rcImage.top + MulDiv(dy,rcImage.right-rcImage.left,dx);
}
//
// if x2 will fit then use it
//
else if (dx * 2 < rcImage.right - rcImage.left)
{
rcImage.right = rcImage.left + dx*2;
rcImage.bottom = rcImage.top + dy*2;
}
//
// else center the image in the preview area
//
else
{
rcImage.right = rcImage.left + dx;
rcImage.bottom = rcImage.top + dy;
}
if (rcImage.bottom > rcPreview.bottom - (rcText.bottom - rcText.top) - dyPlayBar)
{
rcImage.bottom = rcPreview.bottom - (rcText.bottom - rcText.top) - dyPlayBar;
rcImage.right = rcPreview.left + MulDiv(dx,rcImage.bottom-rcImage.top,dy);
rcImage.left = rcPreview.left;
}
rcImage.bottom += dyPlayBar;
//
// now center
//
dx = ((rcPreview.right - rcPreview.left) - (rcText.right - rcText.left))/2;
OffsetRect(&rcText, dx, 0);
dx = ((rcPreview.right - rcPreview.left) - (rcImage.right - rcImage.left))/2;
OffsetRect(&rcImage, dx, 0);
dy = rcPreview.bottom - rcPreview.top;
dy -= rcImage.bottom - rcImage.top;
dy -= rcText.bottom - rcText.top;
if (dy < 0)
dy = 0;
else
dy = dy / 2;
OffsetRect(&rcImage, 0, dy);
OffsetRect(&rcText, 0, dy + rcImage.bottom - rcImage.top + 2);
//
// store RECTs
//
p->rcImage = rcImage;
p->rcText = rcText;
//
// position window.
//
SetWindowPos(p->hwndMci, NULL, rcImage.left, rcImage.top,
rcImage.right - rcImage.left, rcImage.bottom - rcImage.top,
SWP_NOZORDER | SWP_NOACTIVATE);
ShowWindow(p->hwndMci, SW_SHOW);
return TRUE;
}
/***************************************************************************
*
****************************************************************************/
STATICFN BOOL PreviewPaint(PPreviewStuff p)
{
HDC hdc;
HBRUSH hbr;
HWND hwnd = p->hwnd;
if (p == NULL)
return TRUE;
hdc = GetDC(hwnd);
#ifdef _WIN32
hbr = (HBRUSH)DefWindowProc(hwnd, WM_CTLCOLORDLG, (WPARAM)hdc, (LPARAM)hwnd);
#else
hbr = (HBRUSH)DefWindowProc(hwnd, WM_CTLCOLOR, (WPARAM)hdc, MAKELONG(hwnd, CTLCOLOR_DLG));
#endif
////FillRect(hdc, &p->rcPreview, hbr);
FillRect(hdc, &p->rcText, hbr);
SelectObject(hdc, p->hfont);
DrawText(hdc, p->Title, -1, &p->rcText, DT_LEFT|DT_WORDBREAK);
ReleaseDC(hwnd, hdc);
return TRUE;
}
/***************************************************************************
*
****************************************************************************/
#pragma message (SQUAWK "should use the correct header for cmb1, etc")
/* Combo boxes */
#define cmb1 0x0470
#define cmb2 0x0471
/* Listboxes */
#define lst1 0x0460
#define lst2 0x0461
/* Edit controls */
#define edt1 0x0480
#define ID_TIMER 1234
#define PREVIEWWAIT 1000
UINT_PTR FAR PASCAL _loadds GetFileNamePreviewHook(HWND hwnd, unsigned msg, WPARAM wParam, LPARAM lParam)
{
int i;
TCHAR ach[80];
PPreviewStuff p;
p = GetPreviewStuff(hwnd);
switch (msg) {
case WM_COMMAND:
switch (GET_WM_COMMAND_ID(wParam, lParam))
{
case lst1:
if (GET_WM_COMMAND_CMD(wParam, lParam) == LBN_SELCHANGE)
{
KillTimer(hwnd, ID_TIMER);
SetTimer(hwnd, ID_TIMER, PREVIEWWAIT, NULL);
}
break;
case IDOK:
case IDCANCEL:
KillTimer(hwnd, ID_TIMER);
PreviewFile(p, NULL);
break;
case cmb1:
case cmb2:
case lst2:
if (GET_WM_COMMAND_CMD(wParam, lParam) == LBN_SELCHANGE)
{
KillTimer(hwnd, ID_TIMER);
PreviewFile(p, NULL);
}
break;
}
break;
case WM_TIMER:
if (wParam == ID_TIMER)
{
KillTimer(hwnd, ID_TIMER);
ach[0] = 0;
i = (int)SendDlgItemMessage(hwnd, lst1, LB_GETCURSEL, 0, 0L);
SendDlgItemMessage(hwnd, lst1, LB_GETTEXT, i, (LPARAM)(LPTSTR)ach);
PreviewFile(p, ach);
return TRUE;
}
break;
case WM_QUERYNEWPALETTE:
case WM_PALETTECHANGED:
if (p && p->hwndMci)
SendMessage(p->hwndMci, msg, wParam, lParam);
break;
case WM_PAINT:
PreviewPaint(p);
break;
case WM_INITDIALOG:
PreviewOpen(hwnd, (LPOPENFILENAME)lParam);
p = GetPreviewStuff(hwnd);
if (!(p->Flags & OFN_ENABLEHOOK))
return TRUE;
break;
case WM_DESTROY:
PreviewClose(p);
break;
}
if (p && (p->Flags & OFN_ENABLEHOOK))
return (int)p->lpfnHook(hwnd, msg, wParam, lParam);
else
return FALSE;
}
/***************************************************************************
*
****************************************************************************/
STATICFN BOOL GetFileNamePreview(LPOPENFILENAME lpofn, BOOL fSave, BOOL bUnicode)
{
BOOL f;
PPreviewStuff p;
//////// Link to COMMDLG
HINSTANCE h;
BOOL (WINAPI *GetFileNameProc)(OPENFILENAME FAR*) = NULL;
char procname[60];
if (fSave) {
lstrcpyA(procname, "GetSaveFileName");
} else {
lstrcpyA(procname, "GetOpenFileName");
}
#ifdef _WIN32
if (bUnicode) {
lstrcatA(procname, "W");
} else {
lstrcatA(procname, "A");
}
#endif
#ifdef _WIN32
if ((h = LoadLibrary(TEXT("COMDLG32.DLL"))) != NULL) {
(FARPROC)GetFileNameProc = GetProcAddress(h, procname);
#else
if ((h = LoadLibrary(TEXT("COMMDLG.DLL"))) >= (HINSTANCE)HINSTANCE_ERROR) {
(FARPROC)GetFileNameProc = GetProcAddress(h, procname);
#endif
}
if (GetFileNameProc == NULL)
return FALSE; //!!! what's the right error here?
////////////////
#ifndef OFN_NONETWORKBUTTON
#define OFN_NONETWORKBUTTON 0x00020000
#endif
// If we have a READ ONLY checkbox, or both HELP and NETWORK, then it's in
// our way, so get rid of it. (keep NETWORK, lose HELP)
if (!(lpofn->Flags & OFN_HIDEREADONLY))
lpofn->Flags |= OFN_HIDEREADONLY;
if ((lpofn->Flags & OFN_SHOWHELP) && !(lpofn->Flags & OFN_NONETWORKBUTTON))
lpofn->Flags &= ~OFN_SHOWHELP;
p = (LPVOID)GlobalAllocPtr(GHND, sizeof(PreviewStuff));
if (p == NULL)
{
f = GetFileNameProc(lpofn);
}
else
{
p->bUnicode = bUnicode;
p->lpfnHook = lpofn->lpfnHook;
p->Flags = lpofn->Flags;
p->lCustData = lpofn->lCustData;
lpofn->lpfnHook = (LPVOID)GetFileNamePreviewHook;
lpofn->Flags |= OFN_ENABLEHOOK;
lpofn->lCustData = (LPARAM)p;
f = GetFileNameProc(lpofn);
lpofn->lpfnHook = p->lpfnHook;
lpofn->Flags = p->Flags;
GlobalFreePtr(p);
}
FreeLibrary(h); //!!! should we free DLL?
return f;
}
#ifdef _WIN32
/**************************************************************************
* @doc EXTERNAL
*
* @api BOOL | GetOpenFileNamePreview | This is just like <f GetOpenFileName>
* in COMMDLG, but with a preview window so people can see what movie
* they're opening.
*
* @parm LPOPENFILENAME | lpofn | See the documentation for <f GetOpenFileName>.
*
* @rdesc Returns true if a file was opened.
*
* @xref GetOpenFileName
*
*************************************************************************/
BOOL FAR PASCAL _loadds GetOpenFileNamePreviewW(LPOPENFILENAMEW lpofn)
{
return GetFileNamePreview((LPOPENFILENAME)lpofn, FALSE, TRUE);
}
/**************************************************************************
* @doc EXTERNAL
*
* @api BOOL | GetSaveFileNamePreview | This is just like <f GetSaveFileName>
* in COMMDLG, but with a preview window so people can see what movie
* they're saving over.
*
* @parm LPOPENFILENAME | lpofn | See the documentation for <f GetSaveFileName>.
*
* @rdesc Returns true if a file was opened.
*
* @xref GetSaveFileName
*
*************************************************************************/
BOOL FAR PASCAL _loadds GetSaveFileNamePreviewW(LPOPENFILENAMEW lpofn)
{
return GetFileNamePreview((LPOPENFILENAME)lpofn, TRUE, TRUE);
}
// ansi thunks for above two functions
BOOL FAR PASCAL _loadds GetOpenFileNamePreviewA(LPOPENFILENAMEA lpofn)
{
return GetFileNamePreview((LPOPENFILENAME)lpofn, FALSE, FALSE);
}
BOOL FAR PASCAL _loadds GetSaveFileNamePreviewA(LPOPENFILENAMEA lpofn)
{
return GetFileNamePreview((LPOPENFILENAME)lpofn, TRUE, FALSE);
}
#else
BOOL FAR PASCAL _loadds GetOpenFileNamePreview(LPOPENFILENAME lpofn)
{
return GetFileNamePreview(lpofn, FALSE, FALSE);
}
BOOL FAR PASCAL _loadds GetSaveFileNamePreview(LPOPENFILENAME lpofn)
{
return GetFileNamePreview(lpofn, TRUE, FALSE);
}
#endif