{*******************************************************************}
{                                                                   }
{       Developer Express Visual Component Library                  }
{       ExpressPrinting System(tm) COMPONENT SUITE                  }
{                                                                   }
{       Copyright (C) 1998-2009 Developer Express Inc.              }
{       ALL RIGHTS RESERVED                                         }
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{                                                                   }
{   RESTRICTIONS                                                    }
{                                                                   }
{   THIS SOURCE CODE AND ALL RESULTING INTERMEDIATE FILES           }
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{   SECRETS OF DEVELOPER EXPRESS INC. THE REGISTERED DEVELOPER IS   }
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{   EXECUTABLE PROGRAM ONLY.                                        }
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{*******************************************************************}

unit dxfmChFN;

interface

{$I cxVer.inc}

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, dxPSForm;

type
  TfmdxChangeFileName = class(TCustomdxPSForm)
    btnOK: TButton;
    btnCancel: TButton;
    btnHelp: TButton;
    GroupBox1: TGroupBox;
    edFileName: TEdit;
    lblEnterNewFileName: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure edFileNameChange(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
  private
    FFileName: string;
    FModified: Boolean;
    procedure LoadStrings;
    function ValidateFileName: Boolean;
  public
    function Execute: Boolean;
    property FileName: string read FFileName write FFileName;
  end;

function dxShowChooseFileNameDlg(var AFileName: string): Boolean;  

implementation

{$R *.DFM}

uses
  cxClasses, dxPSRes, dxPSUtl;

function dxShowChooseFileNameDlg(var AFileName: string): Boolean;  
begin
  with TfmdxChangeFileName.Create(nil) do 
  try
    FileName := AFileName;
    Result := Execute;
    if Result then AFileName := FileName;
  finally
    Free;
  end;
end;

procedure TfmdxChangeFileName.FormCreate(Sender: TObject);
begin
  edFileName.MaxLength := MAX_PATH;
  LoadStrings;
end;

procedure TfmdxChangeFileName.LoadStrings;
begin
  btnOK.Caption := cxGetResourceString(@sdxBtnOK);
  btnCancel.Caption := cxGetResourceString(@sdxBtnCancel);
  btnHelp.Caption := cxGetResourceString(@sdxBtnHelp);
  Caption := cxGetResourceString(@sdxENFNCaption);
  lblEnterNewFileName.Caption := cxGetResourceString(@sdxEnterNewFileName);
end;

function TfmdxChangeFileName.Execute: Boolean;
begin
  FModified := False;
  edFileName.Text := FileName;
  btnOK.Enabled := False;
  Result := (ShowModal = mrOK) and FModified;
end;

procedure TfmdxChangeFileName.edFileNameChange(Sender: TObject);
begin
  FModified := True;
  btnOK.Enabled := True;
  FileName := TEdit(Sender).Text;
end;

function TfmdxChangeFileName.ValidateFileName: Boolean;
begin
  Result := dxPSUtl.ValidateFileName(FileName);
  if not Result then 
    MessageWarning(Format(cxGetResourceString(@sdxInvalidFileName), [FileName]))
  else
  begin
    Result := not FileExists(FileName);
    if not Result then 
      MessageWarning(Format(cxGetResourceString(@sdxFileAlreadyExists), [FileName]));
  end;
end;

procedure TfmdxChangeFileName.FormCloseQuery(Sender: TObject;
  var CanClose: Boolean);
begin
  if ModalResult = mrOK then
  begin
    CanClose := ValidateFileName;
    ActiveControl := edFileName;
  end;  
end;

end.