richedeh.pas

最新的 DBGRIDEH4.0

{*******************************************************}
{                                                       }
{                       EhLib v3.6                      }
{             Design time Rich Edit window              }
{                                                       }
{   Copyright (c) 1998-2004 by Dmitry V. Bolshakov      }
{                                                       }
{*******************************************************}

unit RichEdEh {$IFDEF CIL} platform{$ENDIF};

{$I EhLib.Inc}
interface

uses
  SysUtils, Windows, Messages, Classes, Graphics, Controls, ImgList,

{$IFDEF CIL} Borland.Vcl.Design.DesignIntf,
             Borland.Vcl.Design.DesignEditors,
             Borland.Vcl.Design.VCLEditors, Variants,
             System.Drawing.Text,
             EhLibVCLNET,
             Types,
{$ELSE}
             EhLibVCL,
  {$IFDEF EH_LIB_6}DesignIntf, DesignEditors,
  {$ELSE}DsgnIntf, {$ENDIF}
{$ENDIF}
  Forms, Dialogs, StdCtrls, Buttons, ExtCtrls, Menus, ComCtrls, ClipBrd,
  ToolWin, PrnDBGEh;

type
  TRichStrEditDlgEh = class(TForm)
    MainMenu: TMainMenu;
    FileNewItem: TMenuItem;
    FileOpenItem: TMenuItem;
    FileSaveItem: TMenuItem;
    FileSaveAsItem: TMenuItem;
    FilePrintItem: TMenuItem;
    FileExitItem: TMenuItem;
    EditUndoItem: TMenuItem;
    EditCutItem: TMenuItem;
    EditCopyItem: TMenuItem;
    EditPasteItem: TMenuItem;
    OpenDialog: TOpenDialog;
    SaveDialog: TSaveDialog;
    PrintDialog: TPrintDialog;
    Ruler: TPanel;
    FontDialog1: TFontDialog;
    FirstInd: TLabel;
    LeftInd: TLabel;
    RulerLine: TBevel;
    RightInd: TLabel;
    N5: TMenuItem;
    miEditFont: TMenuItem;
    Editor: TRichEdit;
    StatusBar: TStatusBar;
    StandardToolBar: TToolBar;
    OpenButton: TToolButton;
    SaveButton: TToolButton;
    PrintButton: TToolButton;
    ToolButton5: TToolButton;
    UndoButton: TToolButton;
    CutButton: TToolButton;
    CopyButton: TToolButton;
    PasteButton: TToolButton;
    ToolButton10: TToolButton;
    FontName: TComboBox;
    FontSize: TEdit;
    ToolButton11: TToolButton;
    UpDown1: TUpDown;
    BoldButton: TToolButton;
    ItalicButton: TToolButton;
    UnderlineButton: TToolButton;
    ToolButton16: TToolButton;
    LeftAlign: TToolButton;
    CenterAlign: TToolButton;
    RightAlign: TToolButton;
    ToolButton20: TToolButton;
    BulletsButton: TToolButton;
    ToolbarImages: TImageList;
    ToolButton2: TToolButton;
    Bevel1: TBevel;
    Panel1: TPanel;
    Panel2: TPanel;
    OKButton: TButton;
    CancelButton: TButton;
    ToolButton1: TToolButton;
    tbSelectFont: TToolButton;

    procedure SelectionChange(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure ShowHint(Sender: TObject);
    procedure FileOpen(Sender: TObject);
    procedure FileSave(Sender: TObject);
    procedure FileSaveAs(Sender: TObject);
    procedure FilePrint(Sender: TObject);
    procedure FileExit(Sender: TObject);
    procedure EditUndo(Sender: TObject);
    procedure EditCut(Sender: TObject);
    procedure EditCopy(Sender: TObject);
    procedure EditPaste(Sender: TObject);
    procedure SelectFont(Sender: TObject);
    procedure RulerResize(Sender: TObject);
    procedure FormResize(Sender: TObject);
    procedure FormPaint(Sender: TObject);
    procedure BoldButtonClick(Sender: TObject);
    procedure ItalicButtonClick(Sender: TObject);
    procedure FontSizeChange(Sender: TObject);
    procedure AlignButtonClick(Sender: TObject);
    procedure FontNameChange(Sender: TObject);
    procedure UnderlineButtonClick(Sender: TObject);
    procedure BulletsButtonClick(Sender: TObject);
    procedure RulerItemMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure RulerItemMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure FirstIndMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure LeftIndMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure RightIndMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure FormShow(Sender: TObject);
    procedure RichEditChange(Sender: TObject);
    procedure EditorKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    FFileName: string;
    FUpdating: Boolean;
    FDragOfs: Integer;
    FDragging: Boolean;
    function CurrText: TTextAttributes;
    procedure GetFontNames;
    procedure SetupRuler;
    procedure SetEditRect;
    procedure UpdateCursorPos;
    procedure WMDropFiles(var Msg: TWMDropFiles); message WM_DROPFILES;
    procedure PerformFileOpen(const AFileName: string);
    procedure SetModified(Value: Boolean);
  end;


type
  TRichEditStringsEh = class(TClassProperty)
  public
    function GetAttributes: TPropertyAttributes; override;
    procedure Edit; override;
  end;

var
  RichStrEditDlgEh: TRichStrEditDlgEh;

procedure Register;

implementation

uses RichEdit, ShellAPI;

resourcestring
  sOverWrite = 'OK to overwrite %s';
  sModified = 'Modified';
  sColRowInfo = 'Line: %3d   Col: %3d';

const
  RulerAdj = 4 / 3;
  GutterWid = 6;

{$R *.DFM}


procedure Register;
begin
  RegisterPropertyEditor(TypeInfo(TStrings), TPrintDBGridEh, 'BeforeGridText', TRichEditStringsEh);
  RegisterPropertyEditor(TypeInfo(TStrings), TPrintDBGridEh, 'AfterGridText', TRichEditStringsEh);
end;

procedure TRichStrEditDlgEh.SelectionChange(Sender: TObject);
begin
  with Editor.Paragraph do
  try
    FUpdating := True;
    FirstInd.Left := Trunc(FirstIndent * RulerAdj) - 4 + GutterWid;
    LeftInd.Left := Trunc((LeftIndent + FirstIndent) * RulerAdj) - 4 + GutterWid;
    RightInd.Left := Ruler.ClientWidth - 6 - Trunc((RightIndent + GutterWid) * RulerAdj);
    BoldButton.Down := fsBold in Editor.SelAttributes.Style;
    ItalicButton.Down := fsItalic in Editor.SelAttributes.Style;
    UnderlineButton.Down := fsUnderline in Editor.SelAttributes.Style;
    BulletsButton.Down := Boolean(Numbering);
    FontSize.Text := IntToStr(Editor.SelAttributes.Size);
    FontName.Text := Editor.SelAttributes.Name;
    case Ord(Alignment) of
      0: LeftAlign.Down := True;
      1: RightAlign.Down := True;
      2: CenterAlign.Down := True;
    end;
    UpdateCursorPos;
  finally
    FUpdating := False;
  end;
end;

function TRichStrEditDlgEh.CurrText: TTextAttributes;
begin
//  if Editor.SelLength > 0 then Result := Editor.SelAttributes
//  else Result := Editor.DefAttributes;
  Result := Editor.SelAttributes;
end;

{$IFDEF CIL}
procedure TRichStrEditDlgEh.GetFontNames;
var
  i: Integer;
  InstalledFonts: System.Drawing.Text.InstalledFontCollection;
begin
  FontName.Items.BeginUpdate;
  try
    FontName.Items.Clear;
    InstalledFonts := System.Drawing.Text.InstalledFontCollection.Create;
    for i := 0 to Length(InstalledFonts.Families) - 1 do
      FontName.Items.Add(InstalledFonts.Families[i].Name);
  finally
    FontName.Items.EndUpdate;
  end;
end;
{$ELSE}
function EnumFontsProc(var LogFont: TLogFont; var TextMetric: TTextMetric;
  FontType: Integer; Data: Pointer): Integer; stdcall;
begin
  TStrings(Data).Add(LogFont.lfFaceName);
  Result := 1;
end;

procedure TRichStrEditDlgEh.GetFontNames;
var
  DC: HDC;
begin
  DC := GetDC(0);
  try
    EnumFonts(DC, nil, @EnumFontsProc, Pointer(FontName.Items));
  finally
    ReleaseDC(0, DC);
  end;
  FontName.Sorted := True;
end;
{$ENDIF}

procedure TRichStrEditDlgEh.SetupRuler;
var
  I: Integer;
  S: String;
begin
  SetLength(S, 201);
  I := 1;
  while I < 200 do
  begin
    S[I] := #9;
    S[I + 1] := '|';
    Inc(I, 2);
  end;
  Ruler.Caption := S;
end;

procedure TRichStrEditDlgEh.SetEditRect;
var
  R: TRect;
begin
  with Editor do
  begin
    R := Rect(GutterWid, 0, ClientWidth - GutterWid, ClientHeight);
{$IFDEF CIL}
    SendStructMessage(Handle, EM_SETRECT, 0, R);
{$ELSE}
    SendMessage(Handle, EM_SETRECT, 0, Longint(@R));
{$ENDIF}
  end;
end;

{ Event Handlers }

procedure TRichStrEditDlgEh.FormCreate(Sender: TObject);
begin
  GetFontNames;
  SetupRuler;
  SelectionChange(Self);

  CurrText.Name := DefFontData.Name;
  CurrText.Size := -MulDiv(DefFontData.Height, 72, Screen.PixelsPerInch);
end;

procedure TRichStrEditDlgEh.ShowHint(Sender: TObject);
begin
  if Length(Application.Hint) > 0 then
  begin
    StatusBar.SimplePanel := True;
    StatusBar.SimpleText := Application.Hint;
  end
  else StatusBar.SimplePanel := False;