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CRichEditView drop file

Posted on 1998-06-07
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Last Modified: 2013-11-19
How can I make my Rich  Edit view accept dropped files like Notepad does? i.e.; immediately render it it plain text instead of creating an OLE object.
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Question by:midthune
2 Comments
 
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Accepted Solution

by:
Tommy Hui earned 100 total points
ID: 1316138
You'll need to do a couple of things:

1. Derive a new class from CRichEditView.

2. Override QueryAcceptData to return TRUE if the object supports the format CF_TEXT:


HRESULT CDrvLayView::QueryAcceptData(LPDATAOBJECT lpdataobj, CLIPFORMAT* lpcfFormat,
        DWORD dwReco, BOOL bReally, HGLOBAL hMetaPict)
{
        if (lpcfFormat == NULL)
                return S_FALSE;

        if (!bReally)
                return S_OK;

        COleDataObject obj;
        obj.Attach(lpdataobj);
        if (obj.IsDataAvailable(CF_TEXT))
        {
                *lpcfFormat = CF_TEXT;
                obj.Detach();
                return S_OK;
        }
        else
        {
                obj.Detach();
        }

        TRACE("format = %d\r\n", *lpcfFormat);

        if (*lpcfFormat == CF_TEXT)
                return CRichEditView::QueryAcceptData(lpdataobj, lpcfFormat, dwReco,
                        bReally, hMetaPict);
        else
                return S_FALSE;
}
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Author Comment

by:midthune
ID: 1316139
Silly me. You had answered this question for me before, but my app would only accept text dragged from other apps, not files. Gee, could this have anything to do with the fact that I had never called DragAcceptFiles()? :)
    You've answered my question but would you be so kind as to let me know if there is an easy way to insert the dropped file's text in the open view (at the dropped point without erasing what's currently there) this is an MDI app and the dropped files only work when they are dropped on the frame, not in a view.
    I would ask another question but I only have 25 points left. I would understand if you do not wish to answer this second question. If you do, I will ask a non-question and give you all of my current points when you respond.
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