WM_DROPFILES

915
    case WM_DROPFILES:
916
        {
917
            HDROP hDrop = (HDROP) wParam; 
918
            // How many files were dropped?
919
            int count = DragQueryFile(hDrop, 0xFFFFFFFF, NULL, 0);
920
            #define _MAX_PATH 260 // FIXME: fixed array length bad
921
            char szFileName[_MAX_PATH];
922
            int i,pathlength;
923
            for (i=0; i<count; i++)
924
            {
925
                pathlength = DragQueryFile(hDrop, i, NULL, 0);
926
                if (pathlength < _MAX_PATH)
927
                {
928
                    DragQueryFile(hDrop, i, szFileName, _MAX_PATH);
929
                    XAP_App * pApp = XAP_App::getApp();
930
                    UT_ASSERT(pApp);
931
                    FV_View* pView = (FV_View *) f->getCurrentView();
932
                    XAP_Frame * pNewFrame = 0;
933
                    IEGraphicFileType iegft = IEGFT_Unknown;                    
934
                    IE_ImpGraphic *pIEG;
935
                    FG_Graphic* pFG;
936
                    UT_Error errorCode = UT_ERROR;
937
 
938
                    /*
939
                        The user may be dropping any kind of file
940
                        Check first if the file is a graphic. If it's a graphic we insert it 
941
                        in the document, if not we assume that it's a document         
942
                    */                                
943
                    // If there is no import graphic, it's a document...
944
                    errorCode = IE_ImpGraphic::constructImporter(szFileName, iegft, &pIEG);
945
                    if(errorCode == UT_OK)
946
                    {                        
947
                        errorCode = pIEG->importGraphic(szFileName, &pFG);
948
 
949
                        DELETEP(pIEG);
950
                        if(errorCode == UT_OK && pFG)
951
                        {
952
                          errorCode = pView->cmdInsertGraphic(pFG);
953
                          DELETEP(pFG);
954
                        }
955
                      }
956
 
957
                    if (errorCode != UT_OK)
958
                    {    
959
                        // Check if the current document is empty.
960
                        if (f->isDirty() || f->getFilename() ||
961
                            (f->getViewNumber() > 0))
962
                        {
963
                            pNewFrame = pApp->newFrame();
964
                            if (pNewFrame == NULL)
965
                            {
966
                              errorCode = UT_ERROR;
967
                              f->setStatusMessage("Could not open another window");
968
                              return 0;
969
                            }
970
                        }
971
                        else
972
                        {
973
                            pNewFrame = f;
974
                        }
975
 
976
                        errorCode = pNewFrame->loadDocument(szFileName, IEFT_Unknown);
977
                        if (errorCode != UT_OK)
978
                        {
979
                            if (f != pNewFrame)
980
                                pNewFrame->close();
981
                        }
982
                        else
983
                        {
984
                            pNewFrame->show();
985
                        }
986
                      }
987
 
988
                    if (errorCode != UT_OK)
989
                      {
990
                        s_CouldNotLoadFileMessage(f, szFileName, errorCode);
991
                      }
992
                }
993
                else
994
                {
995
                }
996
            }
997
            DragFinish(hDrop);
998
        }
999
        return 0;

 

另外一个关于拖曳文件的代码片段：

99
// The main message loop
100
BOOL CALLBACK DialogFunc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
101
{
102
 
103
    switch(uMsg){
104
    case WM_INITDIALOG:
105
        OnStartUp(hwndDlg);
106
        break;
107
 
108
    // Button clicks
109
    case WM_COMMAND:
110
        switch(LOWORD(wParam)){
111
        // UDP echo server start
112
        case IDC_CMDSTART:
113
            OnStartServer(hwndDlg);
114
            break;
115
 
116
        case IDC_CMDSTOP:
117
            OnStopServer(hwndDlg);
118
            break;
119
 
120
        case IDC_CMDABOUT:
121
            OnAbout(hwndDlg);
122
            break;
123
 
124
        case IDC_CMDBROWSE:
125
            OnBrowse(hwndDlg);
126
            break;
127
        }    
128
        return 1;
129
 
130
    case WM_DROPFILES:
131
    {
132
        HDROP hDrop=(HDROP)wParam;
133
        int numFiles=DragQueryFile(hDrop, 0xFFFFFFFF, NULL, 0);
134
        char pFileName[MAX_PATH];
135
 
136
        //CProcessData oProcess;
137
 
138
        for(int i=0; i<numFiles; i++)
139
        {
140
            DragQueryFile(hDrop, i, pFileName, MAX_PATH);
141
            s_oProcess.OnFile(pFileName);
142
        }
143
 
144
        DragFinish(hDrop);
145
 
146
        return 1;
147
    }
148
 
149
    case WM_CLOSE:
150
        OnStopServer(hwndDlg);
151
        CSysLog::Get().StopLog();
152
        CSettings::Get().SaveIni();
153
 
154
        EndDialog(hwndDlg, 0);
155
        return 1;
156
    }
157
 
158
    return 0;
159
}