How to copy text from a TRichEdit to the clipboard with a different font than the original (Views: 29)
Problem/Question/Abstract: I need to ensure that when my TRichEdit copies text to the clipboard, it is copied in a certain font, colour and size. My problem is that my TRichEdit is defaulted to one font and the users are not given the ability to change it. But I want it to pasted into Word (for example) in another font. Answer: You can of course compose a rich text file in code and copy that into the clipboard using the standard rich edit clipboard format, but it's a lot of work. A somewhat simpler approach may be to take the rich text as it is in the control (stream to a TMemoryStream, load into a String) and then modify the \fonttbl tag in the file. procedure TForm1.Button3Click(Sender: TObject); var S: string; ss: TStringstream; ms: TMemoryStream; begin ms := TMemoryStream.Create; try richedit1.Lines.SaveToStream(ms); SetString(S, Pchar(ms.Memory), ms.size); finally ms.free end; memo1.text := S; {view raw rtf in TMemo to see font table} S := Stringreplace(S, 'Times New Roman', 'Verdana', []); ss := TStringstream.Create(S); try richedit1.Lines.LoadFromStream(ss); finally ss.free end; end; To get the new text into the clipboard proceed as below: uses Richedit, Clipbrd; {$R *.dfm} procedure CopyStreamToClipboard(fmt: Cardinal; S: TStream); var hMem: THandle; pMem: Pointer; begin {Rewind stream position to start} S.Position := 0; {Allocate a global memory block the size of the stream data} hMem := GlobalAlloc(GHND or GMEM_DDESHARE, S.Size); if hMem <> 0 then begin {Succeeded, lock the memory handle to get a pointer to the memory} pMem := GlobalLock(hMem); if pMem <> nil then begin {Succeeded, now read the stream contents into the memory the pointer points at} try S.Read(pMem^, S.Size); {Rewind stream again, caller may be confused if the stream position is left at the end} S.Position := 0; finally {Unlock the memory block} GlobalUnlock(hMem); end; {Open clipboard and put the block into it. The way the Delphi clipboard object is written this will clear the clipboard first. Make sure the clipboard is closed even in case of an exception. If left open it would become unusable for other apps.} Clipboard.Open; try Clipboard.SetAsHandle(fmt, hMem); finally Clipboard.Close; end; end else begin {Could not lock the memory block, so free it again and raise an out of memory exception} GlobalFree(hMem); OutOfMemoryError; end; end else {Failed to allocate the memory block, raise exception} OutOfMemoryError; end; var CF_RTF: Word = 0; {set in Initialization section} procedure TForm1.Button3Click(Sender: TObject); var S: string; ss: TStringstream; ms: TMemoryStream; begin ms := TMemoryStream.Create; try richedit1.Lines.SaveToStream(ms); SetString(S, Pchar(ms.Memory), ms.size); finally ms.free end; S := Stringreplace(S, 'Times New Roman', 'Verdana', []); ss := TStringstream.Create(S); try // richedit1.Lines.LoadFromStream(ss); CopyStreamToClipboard(CF_RTF, ss); finally ss.free end; end; initialization CF_RTF := RegisterClipboardFormat(Richedit.CF_RTF); end. |