Re: draw bitmap on Explorer-Style Custom Templates
"ou" <ou07@ab.auone-net.jp> wrote in message
news:%23ZPWCHsfIHA.4196@TK2MSFTNGP04.phx.gbl...
Env: WindowsXP, VC++6.00
I am trying to preview a bitmap file by using Explorer-Style Custom
Templates and GetOpenFileName(). The following is what I did:
(1)make a dlg with ID=IDD_DLG_PREVIEW, style
=WS_CHILD|WS_CLIPSIBLINGS|DS_3DLOOK|DS_CONTROL
(2)put a picture(ID=IDC_STATIC1) with bitmap type on the dlg
(3)define OPENFILENAME ofn as follows,
ofn.lpTemplateName = MAKEINTRESOURCE(IDD_DLG_PREVIEW);
ofn.Flags |=
OFN_FILEMUSTEXIST|OFN_ENABLESIZING|OFN_ENABLETEMPLATE|OFN_ENABLEHOOK;
ofn.lpfnHook =
(LPOFNHOOKPROC)MakeProcInstance((FARPROC)GetOpenFileNameHook,
AfxGetApp()->m_hInstance);
(4)draw bitmap inside GetOpenFileNameHook() as follows,
UINT_PTR CALLBACK GetOpenFileNameHook( HWND hwnd, UINT msg, WPARAM wParam,
LPARAM lParam)
{
switch (msg)
{
case WM_NOTIFY:
LPOFNOTIFY lpOfNotify = (LPOFNOTIFY)lParam;
if( lpOfNotify->hdr.code == CDN_SELCHANGE )
if (IsItBitmapFile(FullPath))
{
HWND hStatic1 = GetDlgItem(hwnd, IDC_STATIC1);
HDC hDC = ::GetDC(hStatic1);
BitBlt(hDC, 0, 0, cx, cy, hdcImage, 0, 0, SRCCOPY);
}
}
With the method above, the bitmap can be showed. However, the bitmap will
be
rubbed if we un-activate the app and re-avtivate it.
Then, I make a class CPreviewDlg(IDD = IDD_DLG_PREVIEW) by ClassZiward.
And
fix GetOpenFileNameHook() as follows,
UINT_PTR CALLBACK GetOpenFileNameHook( HWND hwnd, UINT msg, WPARAM wParam,
LPARAM lParam)
{
switch (msg)
{
case WM_NOTIFY:
LPOFNOTIFY lpOfNotify = (LPOFNOTIFY)lParam;
if( lpOfNotify->hdr.code == CDN_SELCHANGE )
if (IsItBitmapFile(FullPath))
{
InvalidateRect(hwnd, NULL, TRUE);
}
}
And put a break at void CPreviewDlg::OnPaint().
But I find CPreviewDlg::OnPaint() is not called.
I don't know how to solve the problem.
TIA
ou
I'm not really sure what is gobbling up the return key but you can force the
control to handle it by adding the following to your OnKeyUp handler...
virtual void OnKeyUp( System::Windows::Forms::KeyEventArgs^ e ) override
{
if ( e->KeyCode == System::Windows::Forms::Keys::Return )
{
if ( this->Multiline )
{
this->AppendText( L"\r\n" );
e->Handled= true;
}
}
int good_break_point = 0;
}
HTH
--
============
Frank Hickman
NobleSoft, Inc.
============
Replace the _nosp@m_ with @ to reply.