Example-TSynEdit-HTML

unit TipHtmlTest;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, IpHtml, SynHighlighterHTML, SynHighlighterAny,
  SynEdit, Forms, Controls, Graphics, Dialogs, ExtCtrls, StdCtrls;

const
  htmfile = 'tiphtmltestdata.html';

type
  TTipHtmlForm = class(TForm)
    IpHtmlPanel1: TIpHtmlPanel;
    Splitter1: TSplitter;
    Memo1: TSynEdit;
    SynHTMLSyn1: TSynHTMLSyn;
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormCreate(Sender: TObject);
    procedure MemoChange(Sender: TObject);
  protected
  public
    procedure ShowText( const txt: string );
  end;

var
  TipHtmlForm: TTipHtmlForm;

implementation

{$R *.lfm}

procedure TTipHtmlForm.FormCreate(Sender: TObject);
begin
  if FileExists( htmfile ) then
    Memo1.Lines.LoadFromFile( htmfile )
  else
    Memo1.Lines.Text := '<html><head><title>tipmemo</title></head><body><h1>tipmemo</h1>See <b>' +htmfile + '</b></body></html>';
  MemoChange( nil );
end;

procedure TTipHtmlForm.FormClose(Sender: TObject; var CloseAction: TCloseAction);
begin
  Memo1.Lines.SaveToFile( htmfile );
end;

procedure TTipHtmlForm.MemoChange(Sender: TObject);
begin
  ShowText( Memo1.Lines.Text );
end;

procedure TTipHtmlForm.ShowText( const txt: string );
var
  fs: TStringStream;
  pHTML: TIpHtml;
begin
  try
    fs := TStringStream.Create( txt );
    try
      pHTML:=TIpHtml.Create; // Beware: Will be freed automatically by IpHtmlPanel1
      pHTML.LoadFromStream(fs);
    finally
      fs.Free;
    end;
    IpHtmlPanel1.SetHtml( pHTML );
    Caption := IpHtmlPanel1.Title;
  except
    on E: Exception do begin
      MessageDlg( 'Error: '+E.Message, mtError, [mbCancel], 0 );
    end;
  end;
end;