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Diffstat (limited to 'fpicker/source/win32/filepicker/PreviewCtrl.hxx')
| -rw-r--r-- | fpicker/source/win32/filepicker/PreviewCtrl.hxx | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/fpicker/source/win32/filepicker/PreviewCtrl.hxx b/fpicker/source/win32/filepicker/PreviewCtrl.hxx new file mode 100644 index 000000000000..5cde69e5fa65 --- /dev/null +++ b/fpicker/source/win32/filepicker/PreviewCtrl.hxx @@ -0,0 +1,202 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +#ifndef _PREVIEWCTRL_HXX_ +#define _PREVIEWCTRL_HXX_ + +//------------------------------------------------------------------------ +// includes +//------------------------------------------------------------------------ + +#include <sal/types.h> +#include <rtl/ustring.hxx> + +#include <comdef.h> + +#include <memory> + +//--------------------------------------------- +// declaration +//--------------------------------------------- + +class CDimension +{ +public: + CDimension( ) : + m_cx( 0 ), + m_cy( 0 ) + { + } + + CDimension( sal_Int32 cx, sal_Int32 cy ) : + m_cx( cx ), + m_cy( cy ) + { + } + + sal_Int32 m_cx; + sal_Int32 m_cy; +}; + +//-------------------------------------------------- +// we use OleInitialize here because we are calling +// some Ole functions to realize the picture preview +// and we expect to be called from the main thread +// so that there will be no problem calling +// OleInitialize (the main thread should be an STA) +// When OleInitialize should fail at worst the +// preview doesn't work +//-------------------------------------------------- + +class CAutoOleInit +{ +public: + + // used to communicate ole + // initialzation failures + class COleInitException { }; + + CAutoOleInit( ) + { + HRESULT hr = OleInitialize( NULL ); + if ( FAILED( hr ) ) + throw COleInitException( ); + } + + ~CAutoOleInit( ) + { + OleUninitialize( ); + } +}; + +//--------------------------------------------- +// A simple file preview class to preview some +// common picture formats like *.gif, *jpg, etc. +// This class is not thread-safe and is +// implmented as singleton, because the class +// has only one static member to reconnect +// from callback functions +// we use a singleton-destroyer to get rid off +// the singleton instance, but this happens +// only on shutdown (unloading of the dll) - +// it's a question of taste (other solutions +// are possible) +//--------------------------------------------- + +class CFilePreview +{ +public: + // to ensure only one instance (singleton) + static CFilePreview* createInstance( + HWND aParent, + POINT ulCorner, + const CDimension& aSize, + HINSTANCE hInstance, + sal_Bool bShow = sal_True, + sal_Bool bEnabled = sal_True ); + + // sets the size of the preview window + sal_Bool SAL_CALL setSize( const CDimension& aSize ); + + // returns the CDimension of the preview + sal_Bool SAL_CALL getSize( CDimension& theSize ) const; + + // sets the position of the upper left corner + // of the preview window relative to the + // upper left corner of the parent window + sal_Bool SAL_CALL setPos( POINT ulCorner ); + + // returns the current position of the preview + // relative to the upper left corner of the + // parent window + sal_Bool SAL_CALL getPos( POINT& ulCorner ) const; + + // enables or disables the preview window + // bEnable - true the window is enabled and updates its + // view when update is called + // bEnable - false the window shows itself in disabled + // mode and does not update its view when update is + // called + void SAL_CALL enable( sal_Bool bEnable ); + + // shows the preview window + // possible values see SHOW_STATE + sal_Bool SAL_CALL show( sal_Bool bShow ); + + + // if the preview is shown and enabled + // preview of the given file will be shown + // returns true on success or false if an error + // occured (the file in not there or not accessible etc.) + virtual sal_Bool SAL_CALL update( const rtl::OUString& aFileName ); + +protected: + // clients can create instances only through the static create method + CFilePreview( + HWND aParent, + POINT ulCorner, + const CDimension& aSize, + HINSTANCE hInstance, + sal_Bool bShow = sal_True, + sal_Bool bEnabled = sal_True ); + + // only the singleton destroyer class is allowed to delete the + // singleton instance of this class + virtual ~CFilePreview( ); + + // we use the stl auto_ptr class as singleton destroyer + typedef std::auto_ptr< CFilePreview > FILEPREVIEW_SINGLETON_DESTROYER_T; + +protected: + virtual void SAL_CALL onPaint( HWND hWnd, HDC hDC ); + + sal_Bool loadFile( const rtl::OUString& aFileName ); + +private: + CAutoOleInit m_autoOleInit; + POINT m_pt; + CDimension m_dim; + HWND m_hwnd; + sal_Bool m_bEnabled; + IPicturePtr m_IPicture; + ATOM m_atomPrevWndClass; + HINSTANCE m_hInstance; + + static LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam ); + + static CFilePreview* s_FilePreviewInst; + static FILEPREVIEW_SINGLETON_DESTROYER_T s_SingletonDestroyer; + +private: + friend FILEPREVIEW_SINGLETON_DESTROYER_T; +}; + + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |