Mega Code Archive
Insert a image into a TRxRichEdit
<![CDATA[
Title: insert a image into a TRxRichEdit?
uses
RichEdit;
// Stream Callback function
type
TEditStreamCallBack = function(dwCookie: Longint; pbBuff: PByte;
cb: Longint; var pcb: Longint): DWORD;
stdcall;
TEditStream = record
dwCookie: Longint;
dwError: Longint;
pfnCallback: TEditStreamCallBack;
end;
// RichEdit Type
type
TMyRichEdit = TRxRichEdit;
// EditStreamInCallback callback function
function EditStreamInCallback(dwCookie: Longint; pbBuff: PByte;
cb: Longint; var pcb: Longint): DWORD; stdcall;
// by P. Below
var
theStream: TStream;
dataAvail: LongInt;
begin
theStream := TStream(dwCookie);
with theStream do
begin
dataAvail := Size - Position;
Result := 0;
if dataAvail then
begin
pcb := read(pbBuff^, dataAvail);
if pcb dataAvail then
Result := UINT(E_FAIL);
end
else
begin
pcb := read(pbBuff^, cb);
if pcb cb then
Result := UINT(E_FAIL);
end;
end;
end;
// Insert Stream into RichEdit
procedure PutRTFSelection(RichEdit: TMyRichEdit; SourceStream: TStream);
// by P. Below
var
EditStream: TEditStream;
begin
with EditStream do
begin
dwCookie := Longint(SourceStream);
dwError := 0;
pfnCallback := EditStreamInCallBack;
end;
RichEdit.Perform(EM_STREAMIN, SF_RTF or SFF_SELECTION, Longint(@EditStream));
end;
// Convert Bitmap to RTF Code
function BitmapToRTF(pict: TBitmap): string;
// by D3k
var
bi, bb, rtf: string;
bis, bbs: Cardinal;
achar: ShortString;
hexpict: string;
I: Integer;
begin
GetDIBSizes(pict.Handle, bis, bbs);
SetLength(bi, bis);
SetLength(bb, bbs);
GetDIB(pict.Handle, pict.Palette, PChar(bi)^, PChar(bb)^);
rtf := '{\rtf1 {\pict\dibitmap ';
SetLength(hexpict, (Length(bb) + Length(bi)) * 2);
I := 2;
for bis := 1 to Length(bi) do
begin
achar := Format('%x', [Integer(bi[bis])]);
if Length(achar) = 1 then
achar := '0' + achar;
hexpict[I - 1] := achar[1];
hexpict[I] := achar[2];
Inc(I, 2);
end;
for bbs := 1 to Length(bb) do
begin
achar := Format('%x', [Integer(bb[bbs])]);
if Length(achar) = 1 then
achar := '0' + achar;
hexpict[I - 1] := achar[1];
hexpict[I] := achar[2];
Inc(I, 2);
end;
rtf := rtf + hexpict + ' }}';
Result := rtf;
end;
// Example to insert image from Image1 into RxRichEdit1
procedure TForm1.Button1Click(Sender: TObject);
var
SS: TStringStream;
BMP: TBitmap;
begin
BMP := TBitmap.Create;
BMP := Image1.Picture.Bitmap;
SS := TStringStream.Create(BitmapToRTF(BMP));
try
PutRTFSelection(RxRichEdit1, SS);
finally
SS.Free;
end;
end;
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