Compose an e-mail in HTML format / Save image to HTML
We have created an example project which shows how to create the data required for HTML e-mails:
b) OnPrepareImageforSaving
It uses two events:
a) HeaderFooter.BeforeSaveToStream - assigned in From.OnCreate
which is used to write the background image and uses the property 'BodyExtra' property to add a parameter to the BODY tag:
procedure TWPMailForm.DoRTFDataSaveToStream( RTFData: TWPRTFDataCollection; Writer: TWPCustomTextWriter; Stream: TStream; DisplayedRTFBlock: TWPRTFDataBlock; par_s, par_e: TParagraph; pos_in_par_s, pos_in_par_e: Integer);begin if Writer is TWPHTMLWriter then begin TWPHTMLWriter(Writer).BodyExtra := 'background="back.jpg"' ; Image1.Picture.SaveToFile(HTMLFolder.Text + '\' + 'back.jpg' ); AttachmentList.Items.Add('back.jpg'); end;end;This event is called for each image. In case we write to HTML we create a temporary files (using funtion TWPObject.SaveToFile) and assign the name to the property 'FileName' of the image object:
procedure TWPMailForm.WPRichText1PrepareImageforSaving( RTFData: TWPRTFDataCollection; Writer: TWPCustomTextWriter; TextObject: TWPTextObj; var DontSave: Boolean);begin // We clear Source and StreamName to make sure the embedded data is saved to file TextObject.Source := ''; if TextObject.ObjRef<>nil then begin TextObject.ObjRef.StreamName := ''; if FWritingHTML then begin inc(FHTMLImgNr); TextObject.ObjRef.FileName := ExtractFileName( // we want relative filename only TextObject.ObjRef.SaveToFile( HTMLFolder.Text, Format( 'img%d', [FHTMLImgNr] ), '' )); AttachmentList.Items.Add(TextObject.ObjRef.FileName); end; end;end;(Info: The RTF writer ALSO triggers the event OnPrepareImageforSaving!)
To print the tiled image in the background we use the watermark event:
procedure TWPMailForm.WPRichText1PaintWatermark(Sender: TObject;
RTFEngine: TWPRTFEnginePaint; toCanvas: TCanvas; PageRect: TRect;
PaintPageNr, RTFPageNr: Integer; WaterMarkRef: TObject; XRes,
YRes: Integer; CurrentZoom: Single; PaintMode: TWPPaintModes);
begin
WPPrintTiledBackground(toCanvas, PageRect, Image1.Picture.Graphic,
XRes / WPScreenPixelsPerInch);
end;The demo appends the created temporary files to the items in combobox AttachmentList - in your project you would use the Append method of your e-mail tool (Indy, Synapse)
Julian Ziersch