mmprogr.pas

一套及时通讯的原码

{========================================================================}
{=                (c) 1995-98 SwiftSoft Ronald Dittrich                 =}
{========================================================================}
{=                          All Rights Reserved                         =}
{========================================================================}
{=  D 01099 Dresden             = Tel.: [phone]                   =}
{=  Loewenstr.7a                = [e-mail]                     =}
{========================================================================}
{=  Actual versions on http://www.swiftsoft.de/mmtools.html             =}
{========================================================================}
{=  This code is for reference purposes only and may not be copied or   =}
{=  distributed in any format electronic or otherwise except one copy   =}
{=  for backup purposes.                                                =}
{=                                                                      =}
{=  No Delphi Component Kit or Component individually or in a collection=}
{=  subclassed or otherwise from the code in this unit, or associated   =}
{=  .pas, .dfm, .dcu, .asm or .obj files may be sold or distributed     =}
{=  without express permission from SwiftSoft.                          =}
{=                                                                      =}
{=  For more licence informations please refer to the associated        =}
{=  HelpFile.                                                           =}
{========================================================================}
{=  $Date: 20.01.1998 - 18:00:00 $                                      =}
{========================================================================}
unit MMProgr;

{$I COMPILER.INC}

interface

uses
{$IFDEF WIN32}
    Windows,
{$ELSE}
    WinTypes,
    WinProcs,
{$ENDIF}
    Messages,
    SysUtils,
    Classes,
    Graphics,
    Controls,
    Forms,
    Dialogs,
    StdCtrls,
    ExtCtrls,
    MMObj,
    MMUtils,
    MMGauge;

type
  {-- TMMProgressForm ---------------------------------------------------}
  TMMProgressForm = class(TForm)
    Panel1: TPanel;
    Bevel1: TBevel;
    Gauge: TMMGauge;
    btnCancel: TButton;
  end;

  TMMCloseEvent = procedure(Sender: TObject; Canceled: Boolean)of Object;

  {-- TMMProgress -------------------------------------------------------}
  TMMProgress = class(TMMNonVisualComponent)
  private
      FCaption : String;
      FForm    : TMMProgressForm;
      FOnClose : TMMCloseEvent;
      FCanceled: Boolean;

      procedure CancelButtonClick(Sender: TObject);

  protected
      procedure Close; virtual;
  public
      constructor Create(AOwner: TComponent); override;

      procedure Execute;
      procedure SetProgress(aValue: integer);
      function  Visible: Boolean;

  published
      property OnClose: TMMCloseEvent read FOnClose write FOnClose;

      property Caption: String read FCaption write FCaption;
  end;

var
  MMProgressForm: TMMProgressForm;

implementation

{$R *.DFM}

{== TMMProgress =========================================================}
constructor TMMProgress.Create(AOwner: TComponent);
begin
   inherited Create(AOwner);

   FCaption := 'Progress...';
   FForm := nil;

   ErrorCode := ComponentRegistered(InitCode, Self, ClassName);
   if (ErrorCode <> 0) then RegisterFailed(InitCode, Self , ClassName);
end;

{-- TMMProgress ---------------------------------------------------------}
procedure TMMProgress.Close;
begin
   if (FForm <> nil) then
   begin
      FForm.Close;
      FForm.Free;
      FForm := nil;
      if assigned(FOnClose) then FOnClose(Self,FCanceled);
   end;
end;

{-- TMMProgress ---------------------------------------------------------}
procedure TMMProgress.Execute;
begin
   if (FForm = nil) then
   begin
      FCanceled := False;
      FForm := TMMProgressForm.Create(Application);
      FForm.Gauge.Caption := FCaption;
      FForm.btnCancel.OnClick := CancelButtonClick;
      FForm.Show;
      FForm.Update;
   end;
end;

{-- TMMProgress ---------------------------------------------------------}
procedure TMMProgress.SetProgress(aValue: integer);
begin
   if (FForm <> nil) then
   begin
      FForm.Gauge.Progress := aValue;
      if (aValue = 100) then Close;
   end;
end;

{-- TMMProgress ---------------------------------------------------------}
function TMMProgress.Visible: Boolean;
begin
   Result := (FForm <> nil) and FForm.Visible;
end;

{-- TMMProgress ---------------------------------------------------------}
procedure TMMProgress.CancelButtonClick(Sender: TObject);
begin
   FCanceled := True;
   Close;
end;

end.