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[WinAPI] Modyfikowanie tła okna dialogowego » 2012-01-23 20:47:17 Witam,
Próbuję zmodyfikować wygląd okna wyboru pliku wg wskazówek z kursu.
Wszystko jest ok, oprócz tła wywołanego zmodyfikowanego okna wyboru.
Tłem jest wycinek z tego co jest pod spodem.
W żaden sposób nie mogę tego poprawić. Co robię źle?
Poniżej kody procedur obsługi komunikatów. Całość pracuje w prostym filtrze directshow.
UINT_PTR CALLBACK OFNHookProc( HWND hdlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
bool g_Preview;
char buffer[ MAX_PATH ];
BYTE bmi;
HBITMAP g_hBitmap;
void FreeBitmap()
{
if( g_hBitmap )
DeleteObject( g_hBitmap );
g_hBitmap = NULL;
}
UINT_PTR CALLBACK OFNHookProc( HWND hdlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
HDC hDC = GetDC( hdlg );
HDC g_hDCMem = CreateCompatibleDC( hDC );
ASSERT( g_hDCMem );
ReleaseDC( hdlg, hDC );
switch( uMsg )
{
case WM_NOTIFY:
{
NMHDR * pnmhdr =( NMHDR * ) lParam;
OFNOTIFY * ofnot =( OFNOTIFY * ) lParam;
if( pnmhdr->code == CDN_INITDONE )
{
SendMessage( GetParent( hdlg ), DM_REPOSITION, 0, 0 );
}
if( pnmhdr->code == CDN_SELCHANGE )
{
SendMessage( GetParent( hdlg ), CDM_GETFILEPATH, sizeof( buffer ),( LPARAM ) & buffer );
LPSTR filename = buffer;
FreeBitmap();
g_hBitmap =( HBITMAP ) LoadImage( 0, filename, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_CREATEDIBSECTION );
InvalidateRect( hdlg, NULL, true );
}
else
if( pnmhdr->code == CDN_FILEOK )
{
FreeBitmap();
}
return TRUE;
}
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint( hdlg, & ps );
if( g_Preview && g_hBitmap && g_hDCMem )
{
HWND hFrame = GetDlgItem( hdlg, IDC_RAMKA );
RECT rcFrame;
GetWindowRect( hFrame, & rcFrame );
int w = rcFrame.right - rcFrame.left;
int h = rcFrame.bottom - rcFrame.top;
BITMAP bm;
GetObject( g_hBitmap, sizeof( BITMAP ), & bm );
ScreenToClient( hdlg,( LPPOINT ) & rcFrame );
ScreenToClient( hdlg,( LPPOINT ) & rcFrame.right );
HBITMAP hbmDefault = SelectBitmap( g_hDCMem, g_hBitmap );
StretchBlt( hdc, rcFrame.left, rcFrame.top, w, h, g_hDCMem, 0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY );
SelectBitmap( g_hDCMem, hbmDefault );
}
else
{
}
EndPaint( hdlg, & ps );
return TRUE;
}
break;
case WM_DESTROY:
{
FreeBitmap();
return TRUE;
}
break;
case WM_INITDIALOG:
{
g_Preview = FALSE;
RECT r1, r2;
POINT pt;
HWND hWnd = GetParent( hdlg );
GetWindowRect( GetDesktopWindow(), & r1 );
GetWindowRect( hWnd, & r2 );
pt.x =( r1.right - r1.left ) / 2 -( r2.right - r2.left ) / 2;
pt.y =( r1.bottom - r1.top ) / 2 -( r2.bottom - r2.top ) / 2;
MoveWindow( hWnd, pt.x, pt.y, r2.right - r2.left, r2.bottom - r2.top, true );
return TRUE;
}
break;
case WM_COMMAND:
g_Preview =( IsDlgButtonChecked( hdlg, IDC_PREVIEW ) == BST_CHECKED );
InvalidateRect( hdlg, NULL, true );
if( LOWORD( wParam ) == IDOK || LOWORD( wParam ) == IDCANCEL )
{
EndDialog( hdlg, LOWORD( wParam ) );
return TRUE;
}
break;
}
return TRUE;
}
BOOL CATestyProperties::OnReceiveMessage( HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam )
{
switch( uMsg )
{
case WM_COMMAND:
{
if( LOWORD( wParam ) == IDC_BUTTON1 )
{
OPENFILENAME ofn;
char sNazwaPliku[ MAX_PATH ] = "";
ZeroMemory( & ofn, sizeof( ofn ) );
ofn.lStructSize = sizeof( ofn );
ofn.hwndOwner = hwnd;
ofn.lpstrFilter = "Pliki graficzne (*.bmp)\0*.bmp\0Wszystkie pliki\0*.*\0";
ofn.nMaxFile = MAX_PATH;
ofn.lpstrFile = sNazwaPliku;
ofn.lpstrDefExt = "bmp";
ofn.lpfnHook = OFNHookProc;
ofn.hInstance =( HINSTANCE ) GetWindowLong( hwnd, GWL_HINSTANCE );
ofn.lpTemplateName = MAKEINTRESOURCE( IDD_DODATEK );
ofn.Flags = OFN_FILEMUSTEXIST | OFN_HIDEREADONLY | OFN_ENABLEHOOK | OFN_EXPLORER | OFN_ENABLETEMPLATE;
if( GetOpenFileName( & ofn ) )
{
}
return( INT_PTR ) TRUE;
}
if( m_bIsInitialized )
{
SetDirty();
return( LRESULT ) 1;
}
}
break;
}
return CBasePropertyPage::OnReceiveMessage( hwnd, uMsg, wParam, lParam );
} |
DejaVu |
» 2012-01-23 21:23:46 MFC: CWnd::OnEraseBkgnd
WinAPI: WM_ERASEBKGND
Więcej informacji:
http://www.mombu.com/microsoft/windows-programmer-win32/t-wm-paint-wm-erasebkgnd-1275533.html
Czyli:
LRESULT CALLBACK WiadomoCoToJest( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
switch( uMsg )
{
case WM_ERASEBKGND:
return SmarujTlo( hWnd );
break;
default:
return DefWindowProc( hWnd, uMsg, wParam, lParam );
}
return 0;
}
int SmarujTlo( HWND hWnd )
{
HDC hdc;
HBRUSH hbrBkgnd;
PAINTSTRUCT ps;
RECT r;
GetClientRect( hWnd, & r );
hdc = BeginPaint( hWnd, & ps );
hbrBkgnd = CreateSolidBrush( RGB( 255, 255, 255 ) );
FillRect( hdc, & r, hbrBkgnd );
EndPaint( hWnd, & ps );
return 1;
}
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