Richedit中插入图片

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 <= cb 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 := '{{';
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 := 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 := 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;
****************************************
下面的代码可以不调用那个InsertObject的对话框而直接插入一张图片：
var
Bmp:TBitmap;
begin
if not OpenPictureDialog1.Execute then exit;
Bmp:=TBitmap.Create;
Bmp.LoadFromFile(OpenPictureDialog1.FileName);
Clipboard.Assign(BMP);
RxRichEdit201.PasteFromClipboard;
Bmp.Free;
end;
**************************************
： TechnoFantasy(www.applevb.com)
RichEdit中，插入图片
代码:
procedure proPrintRTFWithBMP(strCaption,strPic,strTitle:string;rtf:TRichEdit);
{strText为要打印的文本 strCaption为打印标题 strPic为图像文件目录
strTitle为要显示在图像右侧的图像标题}
var
FRTF:IRichEditOle;
FOLE:IOLEObject;
formatEtc:tagFORMATETC;
FStorage :ISTORAGE;
FClientSite:IOLECLIENTSITE;
FLockBytes:ILockBytes;
ReObject:TReObject;
xt:TGuid;
FTemp:IUnknown;
strTemp:string;
bCreateNew:boolean;
ABMP:TBitmap;
Ajpeg:TJpegImage;
i:Longint;
begin
// rtfTemp:=TRichEdit.Create(frmPrintFrame);
try
{ with rtfTemp do
begin
Parent := frmPrintFrame;
width:=200;
height:=200;
visible:=false;
Text := strText;
end; }
//图片文件不存在，直接打印文本并退出
if not fileexists(strPic)then
begin
PrintRichEdit(strCaption,rtf);
exit;
end;
abmp:=TBitmap.Create;
ajpeg:= TJpegImage.Create;
try
if ExtractFileExt(strPic)='.jpg' then
begin
bCreateNew:=true;
ajpeg.LoadFromFile(strPic);
abmp.Assign(ajpeg);
strTemp:=ExtractFilePath(strPic)+'0099www.bmp';
abmp.SaveToFile(strTemp);
for i:=1 to 30000 do
application.ProcessMessages;
end
else
strTemp:= strPic;
finally
abmp.Free;
ajpeg.free;
abmp:=nil;
ajpeg:=nil;
end;
sendmessage(rtf.handle,EM_GETOLEINTERFACE,0,LongInt(@FRTF));
if not assigned(FRTF)then
begin
showmessage('Error to get Richedit OLE interface');
exit;
end;
//建立一个可以访问全局内存的Byte数组 FLockBytes
//返回ILockBytes接口
if CreateILockBytesOnHGlobal(0,true,FLockBytes)<>S_OK then
begin
showmessage('Error to create Global Heap');
exit;
end;
//建立一个混合文档存取对象
if StgCreateDocfileOnILockBytes(FLockBytes,STGM_SHARE_EXCLUSIVE or
STGM_CREATE or STGM_READWRITE,0,FStorage)<>S_OK then
begin
showmessage('Error to create storage');
exit;
end;
　
formatEtc.cfFormat := 0;
FormatEtc.ptd := nil;
FormatEtc.dwAspect := DVASPECT_CONTENT;
FormatEtc.lindex := -1;
FormatEtc.tymed := TYMED_NULL;
FRTF.GetClientSite(FClientSite);
//从文件中创建一个OLE对象
if OleCreateFromFile(GUID_NULL,PWideChar(WideString(strTemp)),IID_IUnknown,0,@formatEtc,
FClientSite,FStorage,FOLE)<>S_OK then
begin
showmessage('Error');
exit;
end;
//现在的FOLE还是一个IUnKnown接口，将其转换为一个 IOleObject接口
FTemp:=FOLE;
FTemp.QueryInterface(IID_IOleObject, FOle);
OleSetContainedObject(FOle, TRUE);
　
//step 2
reobject.cbStruct := sizeof(TReObject);
FOLE.GetUserClassID(xt);
ReObject.clsid := xt;
reobject.cp := ULong(REO_CP_SELECTION);
reobject.dvaspect := DVASPECT_CONTENT;
reobject.dwFlags := ULong(REO_RESIZABLE) or ULong(REO_BELOWBASELINE);
reobject.dwUser := 0;
reobject.poleobj := FOle;
reobject.polesite := FClientSite;
reobject.pstg := FStorage;
reobject.sizel.cx := 0;
reobject.sizel.cy := 0;
FRTF.InsertObject(reobject);
PrintRichEdit(strCaption,rtf);
finally
if bCreateNew then
Deletefile(strTemp);
FRTF:=nil;
FOLE:=nil;
end;
end;
上面的代码是一个在RTF控件当前位置插入图像并打印的，你运行上面的代码需要首先引用
ActiveX, ComObj, RichEdit, Jpeg
并且将PrintRichEdit(strCaption,rtf);去掉
以下的结构是需要手工加入的：
type
_ReObject = record
cbStruct: DWORD; { Size of structure }
cp: ULONG; { Character position of object }
clsid: TCLSID; { Class ID of object }
poleobj: IOleObject; { OLE object interface }
pstg: IStorage; { Associated storage interface }
polesite: IOleClientSite; { Associated client site interface }
sizel: TSize; { Size of object (may be 0,0) }
dvAspect: Longint; { Display aspect to use }
dwFlags: DWORD; { Object status flags }
dwUser: DWORD; { Dword for user's use }
end;
TReObject = _ReObject;
type
IRichEditOle = interface(IUnknown)
['{00020d00-0000-0000-c000-000000000046}']
function GetClientSite(out clientSite: IOleClientSite): HResult; stdcall;
function GetObjectCount: HResult; stdcall;
function GetLinkCount: HResult; stdcall;
function GetObject(iob: Longint; out reobject: TReObject;
dwFlags: DWORD): HResult; stdcall;
function InsertObject(var reobject: TReObject): HResult; stdcall;
function ConvertObject(iob: Longint; rclsidNew: TIID;
lpstrUserTypeNew: LPCSTR): HResult; stdcall;
function ActivateAs(rclsid: TIID; rclsidAs: TIID): HResult; stdcall;
function SetHostNames(lpstrContainerApp: LPCSTR;
lpstrContainerObj: LPCSTR): HResult; stdcall;
function SetLinkAvailable(iob: Longint; fAvailable: BOOL): HResult; stdcall;
function SetDvaspect(iob: Longint; dvaspect: DWORD): HResult; stdcall;
function HandsOffStorage(iob: Longint): HResult; stdcall;
function SaveCompleted(iob: Longint; const stg: IStorage): HResult; stdcall;
function InPlaceDeactivate: HResult; stdcall;
function ContextSensitiveHelp(fEnterMode: BOOL): HResult; stdcall;
function GetClipboardData(var chrg: TCharRange; reco: DWORD;
out dataobj: IDataObject): HResult; stdcall;
function ImportDataObject(dataobj: IDataObject; cf: TClipFormat;
hMetaPict: HGLOBAL): HResult; stdcall;
end;
Type TCharRange=record
cpMin:integer;
cpMax:integer;
End;
Type TFormatRange=record
hdc : Integer;
hdcTarget:integer;
rectRegion:trect;
rectPage:trect;
chrg : TCharRange;
End;
************************************
以下不通过剪切板而直接在Richedit中插入一张图片：
var
frmMain: TfrmMain;
implementation
{$R *.DFM}
{$R Smiley.res}
uses
RichEdit;
type
TEditStreamCallBack = function(dwCookie: Longint; pbBuff: PByte;
cb: Longint; var pcb: Longint): DWORD;
stdcall;
TEditStream = record
dwCookie: Longint;
dwError: Longint;
pfnCallback: TEditStreamCallBack;
end;
type
TMyRichEdit = TRxRichEdit;
// EditStreamInCallback callback function
function EditStreamInCallback(dwCookie: Longint; pbBuff: PByte;
cb: Longint; var pcb: Longint): DWORD; stdcall;
var
theStream: TStream;
dataAvail: LongInt;
begin
theStream := TStream(dwCookie);
with theStream do
begin
dataAvail := Size - Position;
Result := 0;
if dataAvail <= cb 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);
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;
// Load a smiley image from resource
function GetSmileyCode(ASimily: string): string;
var
dHandle: THandle;
pData, pTemp: PChar;
Size: Longint;
begin
pData := nil;
dHandle := FindResource(hInstance, PChar(ASimily), RT_RCDATA);
if dHandle <> 0 then
begin
Size := SizeofResource(hInstance, dHandle);
dhandle := LoadResource(hInstance, dHandle);
if dHandle <> 0 then
try
pData := LockResource(dHandle);
if pData <> nil then
try
if pData[Size - 1] = #0 then
begin
Result := StrPas(pTemp);
end
else
begin
pTemp := StrAlloc(Size + 1);
try
StrMove(pTemp, pData, Size);
pTemp[Size] := #0;
Result := StrPas(pTemp);
finally
StrDispose(pTemp);
end;
end;
finally
UnlockResource(dHandle);
end;
finally
FreeResource(dHandle);
end;
end;
end;
procedure InsertSmiley(ASmiley: string);
var
ms: TMemoryStream;
s: string;
begin
ms := TMemoryStream.Create;
try
s := GetSmileyCode(ASmiley);
if s <> '' then
begin
ms.Seek(0, soFromEnd);
ms.Write(PChar(s)^, Length(s));
ms.Position := 0;
PutRTFSelection(frmMain.RXRichedit1, ms);
end;
finally
ms.Free;
end;
end;
procedure TfrmMain.SpeedButton1Click(Sender: TObject);
begin
InsertSmiley('Smiley1');
end;
procedure TfrmMain.SpeedButton2Click(Sender: TObject);
begin
InsertSmiley('Smiley2');
end;
// Replace a or :-( with a corresponding smiley
procedure TfrmMain.RxRichEdit1KeyPress(Sender: TObject; var Key: Char);
var
sCode, SmileyName: string;
procedure RemoveText(RichEdit: TMyRichEdit);
begin
with RichEdit do
begin
SelStart := SelStart - 2;
SelLength := 2;
SelText := '';
end;
end;
begin
If (Key = ')') or (Key = '(') then
begin
sCode := Copy(RxRichEdit1.Text, RxRichEdit1.SelStart-1, 2) + Key;
SmileyName := '';
if sCode = '' then SmileyName := 'Smiley1';
if sCode = ':-(' then SmileyName := 'Smiley2';
if SmileyName <> '' then
begin
Key := #0;
RemoveText(RxRichEdit1);
InsertSmiley('Smiley1');
end;
end;
end;