1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski 24*b1cdbd2cSJim Jagielski #ifndef _PREVIEWCTRL_HXX_ 25*b1cdbd2cSJim Jagielski #define _PREVIEWCTRL_HXX_ 26*b1cdbd2cSJim Jagielski 27*b1cdbd2cSJim Jagielski //------------------------------------------------------------------------ 28*b1cdbd2cSJim Jagielski // includes 29*b1cdbd2cSJim Jagielski //------------------------------------------------------------------------ 30*b1cdbd2cSJim Jagielski 31*b1cdbd2cSJim Jagielski #include <sal/types.h> 32*b1cdbd2cSJim Jagielski #include <rtl/ustring.hxx> 33*b1cdbd2cSJim Jagielski 34*b1cdbd2cSJim Jagielski #include <comdef.h> 35*b1cdbd2cSJim Jagielski 36*b1cdbd2cSJim Jagielski #include <memory> 37*b1cdbd2cSJim Jagielski 38*b1cdbd2cSJim Jagielski //--------------------------------------------- 39*b1cdbd2cSJim Jagielski // declaration 40*b1cdbd2cSJim Jagielski //--------------------------------------------- 41*b1cdbd2cSJim Jagielski 42*b1cdbd2cSJim Jagielski class CDimension 43*b1cdbd2cSJim Jagielski { 44*b1cdbd2cSJim Jagielski public: CDimension()45*b1cdbd2cSJim Jagielski CDimension( ) : 46*b1cdbd2cSJim Jagielski m_cx( 0 ), 47*b1cdbd2cSJim Jagielski m_cy( 0 ) 48*b1cdbd2cSJim Jagielski { 49*b1cdbd2cSJim Jagielski } 50*b1cdbd2cSJim Jagielski CDimension(sal_Int32 cx,sal_Int32 cy)51*b1cdbd2cSJim Jagielski CDimension( sal_Int32 cx, sal_Int32 cy ) : 52*b1cdbd2cSJim Jagielski m_cx( cx ), 53*b1cdbd2cSJim Jagielski m_cy( cy ) 54*b1cdbd2cSJim Jagielski { 55*b1cdbd2cSJim Jagielski } 56*b1cdbd2cSJim Jagielski 57*b1cdbd2cSJim Jagielski sal_Int32 m_cx; 58*b1cdbd2cSJim Jagielski sal_Int32 m_cy; 59*b1cdbd2cSJim Jagielski }; 60*b1cdbd2cSJim Jagielski 61*b1cdbd2cSJim Jagielski //-------------------------------------------------- 62*b1cdbd2cSJim Jagielski // we use OleInitialize here because we are calling 63*b1cdbd2cSJim Jagielski // some Ole functions to realize the picture preview 64*b1cdbd2cSJim Jagielski // and we expect to be called from the main thread 65*b1cdbd2cSJim Jagielski // so that there will be no problem calling 66*b1cdbd2cSJim Jagielski // OleInitialize (the main thread should be an STA) 67*b1cdbd2cSJim Jagielski // When OleInitialize should fail at worst the 68*b1cdbd2cSJim Jagielski // preview doesn't work 69*b1cdbd2cSJim Jagielski //-------------------------------------------------- 70*b1cdbd2cSJim Jagielski 71*b1cdbd2cSJim Jagielski class CAutoOleInit 72*b1cdbd2cSJim Jagielski { 73*b1cdbd2cSJim Jagielski public: 74*b1cdbd2cSJim Jagielski 75*b1cdbd2cSJim Jagielski // used to communicate ole 76*b1cdbd2cSJim Jagielski // initialzation failures 77*b1cdbd2cSJim Jagielski class COleInitException { }; 78*b1cdbd2cSJim Jagielski CAutoOleInit()79*b1cdbd2cSJim Jagielski CAutoOleInit( ) 80*b1cdbd2cSJim Jagielski { 81*b1cdbd2cSJim Jagielski HRESULT hr = OleInitialize( NULL ); 82*b1cdbd2cSJim Jagielski if ( FAILED( hr ) ) 83*b1cdbd2cSJim Jagielski throw COleInitException( ); 84*b1cdbd2cSJim Jagielski } 85*b1cdbd2cSJim Jagielski ~CAutoOleInit()86*b1cdbd2cSJim Jagielski ~CAutoOleInit( ) 87*b1cdbd2cSJim Jagielski { 88*b1cdbd2cSJim Jagielski OleUninitialize( ); 89*b1cdbd2cSJim Jagielski } 90*b1cdbd2cSJim Jagielski }; 91*b1cdbd2cSJim Jagielski 92*b1cdbd2cSJim Jagielski //--------------------------------------------- 93*b1cdbd2cSJim Jagielski // A simple file preview class to preview some 94*b1cdbd2cSJim Jagielski // common picture formats like *.gif, *jpg, etc. 95*b1cdbd2cSJim Jagielski // This class is not thread-safe and is 96*b1cdbd2cSJim Jagielski // implmented as singleton, because the class 97*b1cdbd2cSJim Jagielski // has only one static member to reconnect 98*b1cdbd2cSJim Jagielski // from callback functions 99*b1cdbd2cSJim Jagielski // we use a singleton-destroyer to get rid off 100*b1cdbd2cSJim Jagielski // the singleton instance, but this happens 101*b1cdbd2cSJim Jagielski // only on shutdown (unloading of the dll) - 102*b1cdbd2cSJim Jagielski // it's a question of taste (other solutions 103*b1cdbd2cSJim Jagielski // are possible) 104*b1cdbd2cSJim Jagielski //--------------------------------------------- 105*b1cdbd2cSJim Jagielski 106*b1cdbd2cSJim Jagielski class CFilePreview 107*b1cdbd2cSJim Jagielski { 108*b1cdbd2cSJim Jagielski public: 109*b1cdbd2cSJim Jagielski // to ensure only one instance (singleton) 110*b1cdbd2cSJim Jagielski static CFilePreview* createInstance( 111*b1cdbd2cSJim Jagielski HWND aParent, 112*b1cdbd2cSJim Jagielski POINT ulCorner, 113*b1cdbd2cSJim Jagielski const CDimension& aSize, 114*b1cdbd2cSJim Jagielski HINSTANCE hInstance, 115*b1cdbd2cSJim Jagielski sal_Bool bShow = sal_True, 116*b1cdbd2cSJim Jagielski sal_Bool bEnabled = sal_True ); 117*b1cdbd2cSJim Jagielski 118*b1cdbd2cSJim Jagielski // sets the size of the preview window 119*b1cdbd2cSJim Jagielski sal_Bool SAL_CALL setSize( const CDimension& aSize ); 120*b1cdbd2cSJim Jagielski 121*b1cdbd2cSJim Jagielski // returns the CDimension of the preview 122*b1cdbd2cSJim Jagielski sal_Bool SAL_CALL getSize( CDimension& theSize ) const; 123*b1cdbd2cSJim Jagielski 124*b1cdbd2cSJim Jagielski // sets the position of the upper left corner 125*b1cdbd2cSJim Jagielski // of the preview window relative to the 126*b1cdbd2cSJim Jagielski // upper left corner of the parent window 127*b1cdbd2cSJim Jagielski sal_Bool SAL_CALL setPos( POINT ulCorner ); 128*b1cdbd2cSJim Jagielski 129*b1cdbd2cSJim Jagielski // returns the current position of the preview 130*b1cdbd2cSJim Jagielski // relative to the upper left corner of the 131*b1cdbd2cSJim Jagielski // parent window 132*b1cdbd2cSJim Jagielski sal_Bool SAL_CALL getPos( POINT& ulCorner ) const; 133*b1cdbd2cSJim Jagielski 134*b1cdbd2cSJim Jagielski // enables or disables the preview window 135*b1cdbd2cSJim Jagielski // bEnable - true the window is enabled and updates its 136*b1cdbd2cSJim Jagielski // view when update is called 137*b1cdbd2cSJim Jagielski // bEnable - false the window shows itself in disabled 138*b1cdbd2cSJim Jagielski // mode and does not update its view when update is 139*b1cdbd2cSJim Jagielski // called 140*b1cdbd2cSJim Jagielski void SAL_CALL enable( sal_Bool bEnable ); 141*b1cdbd2cSJim Jagielski 142*b1cdbd2cSJim Jagielski // shows the preview window 143*b1cdbd2cSJim Jagielski // possible values see SHOW_STATE 144*b1cdbd2cSJim Jagielski sal_Bool SAL_CALL show( sal_Bool bShow ); 145*b1cdbd2cSJim Jagielski 146*b1cdbd2cSJim Jagielski 147*b1cdbd2cSJim Jagielski // if the preview is shown and enabled 148*b1cdbd2cSJim Jagielski // preview of the given file will be shown 149*b1cdbd2cSJim Jagielski // returns true on success or false if an error 150*b1cdbd2cSJim Jagielski // occured (the file in not there or not accessible etc.) 151*b1cdbd2cSJim Jagielski virtual sal_Bool SAL_CALL update( const rtl::OUString& aFileName ); 152*b1cdbd2cSJim Jagielski 153*b1cdbd2cSJim Jagielski protected: 154*b1cdbd2cSJim Jagielski // clients can create instances only through the static create method 155*b1cdbd2cSJim Jagielski CFilePreview( 156*b1cdbd2cSJim Jagielski HWND aParent, 157*b1cdbd2cSJim Jagielski POINT ulCorner, 158*b1cdbd2cSJim Jagielski const CDimension& aSize, 159*b1cdbd2cSJim Jagielski HINSTANCE hInstance, 160*b1cdbd2cSJim Jagielski sal_Bool bShow = sal_True, 161*b1cdbd2cSJim Jagielski sal_Bool bEnabled = sal_True ); 162*b1cdbd2cSJim Jagielski 163*b1cdbd2cSJim Jagielski // only the singleton destroyer class is allowed to delete the 164*b1cdbd2cSJim Jagielski // singleton instance of this class 165*b1cdbd2cSJim Jagielski virtual ~CFilePreview( ); 166*b1cdbd2cSJim Jagielski 167*b1cdbd2cSJim Jagielski // we use the stl auto_ptr class as singleton destroyer 168*b1cdbd2cSJim Jagielski typedef std::auto_ptr< CFilePreview > FILEPREVIEW_SINGLETON_DESTROYER_T; 169*b1cdbd2cSJim Jagielski 170*b1cdbd2cSJim Jagielski protected: 171*b1cdbd2cSJim Jagielski virtual void SAL_CALL onPaint( HWND hWnd, HDC hDC ); 172*b1cdbd2cSJim Jagielski 173*b1cdbd2cSJim Jagielski sal_Bool loadFile( const rtl::OUString& aFileName ); 174*b1cdbd2cSJim Jagielski 175*b1cdbd2cSJim Jagielski private: 176*b1cdbd2cSJim Jagielski CAutoOleInit m_autoOleInit; 177*b1cdbd2cSJim Jagielski POINT m_pt; 178*b1cdbd2cSJim Jagielski CDimension m_dim; 179*b1cdbd2cSJim Jagielski HWND m_hwnd; 180*b1cdbd2cSJim Jagielski sal_Bool m_bEnabled; 181*b1cdbd2cSJim Jagielski IPicturePtr m_IPicture; 182*b1cdbd2cSJim Jagielski ATOM m_atomPrevWndClass; 183*b1cdbd2cSJim Jagielski HINSTANCE m_hInstance; 184*b1cdbd2cSJim Jagielski 185*b1cdbd2cSJim Jagielski static LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam ); 186*b1cdbd2cSJim Jagielski 187*b1cdbd2cSJim Jagielski static CFilePreview* s_FilePreviewInst; 188*b1cdbd2cSJim Jagielski static FILEPREVIEW_SINGLETON_DESTROYER_T s_SingletonDestroyer; 189*b1cdbd2cSJim Jagielski 190*b1cdbd2cSJim Jagielski private: 191*b1cdbd2cSJim Jagielski friend FILEPREVIEW_SINGLETON_DESTROYER_T; 192*b1cdbd2cSJim Jagielski }; 193*b1cdbd2cSJim Jagielski 194*b1cdbd2cSJim Jagielski 195*b1cdbd2cSJim Jagielski #endif 196