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How to copy text from a TRichEdit to the clipboard with a different font than th Turn on/off line numbers in source code. Switch to Orginial background IDE or DSP color Comment or reply to this aritlce/tip for discussion. Bookmark this article to my favorite article(s). Print this article
12-Oct-02
Category
Graphic
Language
Delphi 2.x
Views
137
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Publisher:
DSP, Administrator
Reference URL:
DKB
			Author: Jonas Bilinkevicius

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.

1   procedure TForm1.Button3Click(Sender: TObject);
2   var
3     S: string;
4     ss: TStringstream;
5     ms: TMemoryStream;
6   begin
7     ms := TMemoryStream.Create;
8     try
9       richedit1.Lines.SaveToStream(ms);
10      SetString(S, Pchar(ms.Memory), ms.size);
11    finally
12      ms.free
13    end;
14    memo1.text := S; {view raw rtf in TMemo to see font table}
15    S := Stringreplace(S, 'Times New Roman', 'Verdana', []);
16    ss := TStringstream.Create(S);
17    try
18      richedit1.Lines.LoadFromStream(ss);
19    finally
20      ss.free
21    end;
22  end;
23  
24  //To get the new text into the clipboard proceed as below:
25  
26  uses
27    Richedit, Clipbrd;
28  
29  {$R *.dfm}
30  
31  procedure CopyStreamToClipboard(fmt: Cardinal; S: TStream);
32  var
33    hMem: THandle;
34    pMem: Pointer;
35  begin
36    {Rewind stream position to start}
37    S.Position := 0;
38    {Allocate a global memory block the size of the stream data}
39    hMem := GlobalAlloc(GHND or GMEM_DDESHARE, S.Size);
40    if hMem <> 0 then
41    begin
42      {Succeeded, lock the memory handle to get a pointer to the memory}
43      pMem := GlobalLock(hMem);
44      if pMem <> nil then
45      begin
46        {Succeeded, now read the stream contents into the memory the pointer points 
47  at}
48        try
49          S.read(pMem^, S.Size);
50          {Rewind stream again, caller may be confused if the stream position is
51  			 left at the end}
52          S.Position := 0;
53        finally
54          {Unlock the memory block}
55          GlobalUnlock(hMem);
56        end;
57        {Open clipboard and put the block into it. The way the Delphi clipboard 
58  			object is written this will clear the clipboard first.
59  			 Make sure the clipboard is closed even in case of an exception. If left open
60        it would become unusable for other apps.}
61        Clipboard.Open;
62        try
63          Clipboard.SetAsHandle(fmt, hMem);
64        finally
65          Clipboard.Close;
66        end;
67      end
68      else
69      begin
70        {Could not lock the memory block, so free it again and raise an out of 
71  			memory exception}
72        GlobalFree(hMem);
73        OutOfMemoryError;
74      end;
75    end
76    else
77      {Failed to allocate the memory block, raise exception}
78      OutOfMemoryError;
79  end;
80  
81  var
82    CF_RTF: Word = 0; {set in Initialization section}
83  
84  procedure TForm1.Button3Click(Sender: TObject);
85  var
86    S: string;
87    ss: TStringstream;
88    ms: TMemoryStream;
89  begin
90    ms := TMemoryStream.Create;
91    try
92      richedit1.Lines.SaveToStream(ms);
93      SetString(S, Pchar(ms.Memory), ms.size);
94    finally
95      ms.free
96    end;
97    S := Stringreplace(S, 'Times New Roman', 'Verdana', []);
98    ss := TStringstream.Create(S);
99    try
100     // richedit1.Lines.LoadFromStream(ss);
101     CopyStreamToClipboard(CF_RTF, ss);
102   finally
103     ss.free
104   end;
105 end;
106 
107 initialization
108   CF_RTF := RegisterClipboardFormat(Richedit.CF_RTF);
109 end.


			
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