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preview.cpp
Package: shell.rar [view]
Upload User: xhy777
Upload Date: 2007-02-14
Package Size: 24088k
Code Size: 4k
Category:
Windows Kernel
Development Platform:
Visual C++
- /////////////////////////////////////////////////////////////////////////////
- // PREVIEW.CPP
- //
- // Implementation of CPreviewWindow
- //
- // History:
- //
- // Author Date Description
- // ------ ---- -----------
- // jaym 08/26/96 Created
- // jaym 02/03/97 Updated to use new CDIB class
- /////////////////////////////////////////////////////////////////////////////
- #include "precomp.h"
- #include "dib.h"
- #include "resource.h"
- #include "preview.h"
- /////////////////////////////////////////////////////////////////////////////
- // CPreviewWindow
- /////////////////////////////////////////////////////////////////////////////
- CPreviewWindow::CPreviewWindow
- (
- )
- {
- m_pDIB = NULL;
- }
- CPreviewWindow::~CPreviewWindow
- (
- )
- {
- if (m_pDIB != NULL)
- delete m_pDIB;
- }
- /////////////////////////////////////////////////////////////////////////////
- // CPreviewWindow::Create
- /////////////////////////////////////////////////////////////////////////////
- BOOL CPreviewWindow::Create
- (
- const RECT & rect,
- HWND hwndParent
- )
- {
- BOOL bResult = FALSE;
- for (;;)
- {
- m_pDIB = new CDIB;
- if (m_pDIB == NULL)
- break;
- if (!m_pDIB->LoadFromResource( _pModule->GetResourceInstance(),
- IDB_PREVIEW))
- {
- break;
- }
- bResult = CWindow::Create( NULL,
- ((hwndParent != NULL) ? WS_CHILD
- : WS_POPUP),
- rect,
- hwndParent,
- 0);
- break;
- }
- if (!bResult)
- {
- // Cleanup
- if (m_pDIB != NULL)
- delete m_pDIB;
- }
- else
- ShowWindow(SW_SHOWNORMAL);
- return bResult;
- }
- /////////////////////////////////////////////////////////////////////////////
- // CPreviewWindow::OnDestroy
- /////////////////////////////////////////////////////////////////////////////
- void CPreviewWindow::OnDestroy
- (
- )
- {
- CWindow::OnDestroy();
- PostQuitMessage(0);
- }
- /////////////////////////////////////////////////////////////////////////////
- // CPreviewWindow::OnPaint
- /////////////////////////////////////////////////////////////////////////////
- void CPreviewWindow::OnPaint
- (
- HDC hDC,
- PAINTSTRUCT * ps
- )
- {
- if (m_pDIB != NULL)
- {
- RECT rectDraw;
- GetClientRect(&rectDraw);
- m_pDIB->Draw(hDC, NULL, &rectDraw);
- }
- }
- /////////////////////////////////////////////////////////////////////////////
- // CPreviewWindow::OnPaletteChanged
- /////////////////////////////////////////////////////////////////////////////
- void CPreviewWindow::OnPaletteChanged
- (
- HWND hwndPalChng
- )
- {
- // If we caused the palette change, do nothing.
- if (hwndPalChng == m_hWnd)
- return;
- // Re-realize the palette.
- OnQueryNewPalette();
- }
- /////////////////////////////////////////////////////////////////////////////
- // CPreviewWindow::OnQueryNewPalette
- /////////////////////////////////////////////////////////////////////////////
- BOOL CPreviewWindow::OnQueryNewPalette
- (
- )
- {
- HDC hDC;
- HPALETTE hPalOld;
- UINT uRemapCount;
- if ((hDC = GetDC()) == NULL)
- return FALSE;
- hPalOld = SelectPalette(hDC, m_pDIB->m_hPalette, FALSE);
- uRemapCount = RealizePalette(hDC);
- if (hPalOld != NULL)
- SelectPalette(hDC, hPalOld, TRUE);
- if (uRemapCount != 0)
- SysPalChanged();
- ReleaseDC(hDC);
- return (BOOL)uRemapCount;
- }