> How can I copy a text formatted as RTF ({\rtf1\ansi ....) on the Clipboard?
{
You have to dig into the Rich Text Format if you want to copy text to the
clipboard that has format information embedded. The application you paste
this text into has to understand RTF, or the formatting will not show up.
OK, the first step is to register a clipboard format for RTF, since this is
not a predefined format:
}
Var
CF_RTF : Word;
CF_RTF := RegisterClipboardFormat('Rich Text Format');
{
The format name has to appear as typed above, this is the name used by MS
Word for Windows and similar MS products.
NOTE: The Richedit Unit declares a constant CF_RTF, which is NOT the
clipboard format handle but the string you need to pass to RegisterClipboard
format! So you can place Richedit into your uses clause and change the line
above to
}
CF_RTF := RegisterClipboardFormat(Richedit.CF_RTF);
{
The next step is to build a RTF string with the embedded format information.
You will get a shock if you inspect the mess of RTF stuff W4W will put into
the clipboard if you copy just a few characters (the app below allows you to
inspect the clipboard), but you can get away with a lot less. The bare
minimum would be something like this (inserts an underlined 44444):
}
const
testtext: PChar = '{\rtf1\ansi\pard\plain 12{\ul 44444}}';
{
The correct balance of opening and closing braces is extremely important, one
mismatch and the target app will not be able to interpret the text
correctly. If you want to control the font used for the pasted text you need
to add a fonttable (the default font is Tms Rmn, not the active font in the
target app!). See example app below, testtext2. If you want more info, the
full RTF specs can be found on www.microsoft.com, a subset is also described
in the Windows help compiler docs (hcw.hlp, comes with Delphi).
}
unit Clipfmt1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
MemFormats: TMemo;
label1: TLabel;
BtnShowFormats: TButton;
BtnGetRTF: TButton;
BtnSetRTF: TButton;
MemExample: TMemo;
procedure FormCreate(Sender: TObject);
procedure BtnShowFormatsClick(Sender: TObject);
procedure BtnGetRTFClick(Sender: TObject);
procedure BtnSetRTFClick(Sender: TObject);
private
public
CF_RTF: Word;
end;
var
Form1: TForm1;
implementation
uses Clipbrd;
{$R *.DFM}
procedure TForm1.FormCreate(Sender: TObject);
begin
// register clipboard format rtf
CF_RTF := RegisterClipboardFormat('Rich Text Format');
if CF_RTF = 0 then
begin
ShowMessage('Unable to register the Rich Text clipboard format!');
Application.Terminate;
end;
BtnShowFormats.Click;
end;
// show clipboard formats
procedure TForm1.BtnShowFormatsClick(Sender: TObject);
var
buf: array [0..60] of Char;
n: Integer;
fmt: Word;
Name: string[30];
begin
MemFormats.Clear;
for n := 0 to Clipboard.FormatCount - 1 do
begin
fmt := Clipboard.Formats[n];
if GetClipboardFormatName(fmt, buf, Pred(SizeOf(buf))) <> 0 then
MemFormats.Lines.Add(StrPas(buf))
else
begin
case fmt of
1: Name := 'CF_TEXT';
2: Name := 'CF_BITMAP';
3: Name := 'CF_METAFILEPICT';
4: Name := 'CF_SYLK';
5: Name := 'CF_DIF';
6: Name := 'CF_TIFF';
7: Name := 'CF_OEMTEXT';
8: Name := 'CF_DIB';
9: Name := 'CF_PALETTE';
10: Name := 'CF_PENDATA';
11: Name := 'CF_RIFF';
12: Name := 'CF_WAVE';
13: Name := 'CF_UNICODETEXT';
14: Name := 'CF_ENHMETAFILE';
15: Name := 'CF_HDROP (Win 95)';
16: Name := 'CF_LOCALE (Win 95)';
17: Name := 'CF_MAX (Win 95)';
$0080: Name := 'CF_OWNERDISPLAY';
$0081: Name := 'CF_DSPTEXT';
$0082: Name := 'CF_DSPBITMAP';
$0083: Name := 'CF_DSPMETAFILEPICT';
$008E: Name := 'CF_DSPENHMETAFILE';
$0200..$02FF: Name := 'private format';
$0300..$03FF: Name := 'GDI object';
else
Name := 'unknown format';
end;
MemFormats.Lines.Add(Name);
end;
end;
end;
// get rtf code from clipboard
procedure TForm1.BtnGetRTFClick(Sender: TObject);
var
MemHandle: THandle;
begin
with Clipboard do
begin
Open;
try
if HasFormat(CF_RTF) then
begin
MemHandle := GetAsHandle(CF_RTF);
MemExample.SetTextBuf(GlobalLock(MemHandle));
GlobalUnlock(MemHandle);
end
else
MessageDlg('The clipboard contains no RTF text!',
mtError, [mbOK], 0);
finally
Close;
end;
end;
end;
// set rtf code to the clipboard
procedure TForm1.BtnSetRTFClick(Sender: TObject);
const
testtext: PChar = '{\rtf1\ansi\pard\plain 12{\ul 44444}}';
testtext2: PChar = '{\rtf1\ansi' +
'\deff4\deflang1033{\fonttbl{\f4\froman\fcharset0\fprq2 Times New Roman;}}' +
'\pard\plain 12{\ul 44444}}';
flap: Boolean = False;
var
MemHandle: THandle;
rtfstring: PChar;
begin
with Clipboard do
begin
if flap then
rtfstring := testtext2
else
rtfstring := testtext;
flap := not flap;
MemHandle := GlobalAlloc(GHND or GMEM_SHARE, StrLen(rtfstring) + 1);
if MemHandle <> 0 then
begin
StrCopy(GlobalLock(MemHandle), rtfstring);
GlobalUnlock(MemHandle);
Open;
try
AsText := '1244444';
SetAsHandle(CF_RTF, MemHandle);
finally
Close;
end;
end
else
MessageDlg('Global Alloc failed!',
mtError, [mbOK], 0);
end;
end;
end.
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