元件屬性 Propery 屬性編輯器

{ TMixedComponent }
TMixedComponent = class(TComponent)
  private
    FFileName: String;
  published
    property  FileName : String read FFileName write FFileName;
    { Published declarations }
  end;
  { TMixedFileNameProperty }
  TMixedFileNameProperty = class(TPropertyEditor)
    function    AllEqual: boolean; override;
    procedure   Edit; override;
    function    GetAttributes: TPropertyAttributes; override;
    function    GetValue: string; override;
    procedure   SetValue (const  Value: string); override;
  end;
procedure  Register;

implementation

procedure  Register;
begin
  RegisterPropertyEditor(TypeInfo(string), TMixedComponent, 'FileName', TMixedFileNameProperty);
  RegisterComponents('Samples', [TMixedComponent]);
end;

function  TMixedFileNameProperty.AllEqual: boolean;
var
  FirstVal: string;
  i: Integer;
begin
  FirstVal := GetStrValue;
  Result := True;
  i := 1;
  while  Result and  (i < PropCount) do
  begin
    Result := Result and  (GetStrValueAt(i) = FirstVal);
    Inc(i);
  end;
end;

procedure  TMixedFileNameProperty.Edit;
var
  Dlg: TOpenDialog;
begin
  Dlg := TOpenDialog.Create(Application);
  try
    with  Dlg do
    begin
      Title := 'File for ' + TComponent(GetComponent(0)).Name;
      FileName:= Value;
      if  Execute then  Value := FileName;
    end;
  finally
    FreeAndNil(Dlg);
  end
end;

function  TMixedFileNameProperty.GetAttributes: TPropertyAttributes;
begin
  Result := [paDialog]
end;

function  TMixedFileNameProperty.GetValue: string;
begin
  Result := GetStrValue;
end;

procedure  TMixedFileNameProperty.SetValue(const  Value: string);
begin
  SetStrValue(Value);
end;
轉貼至:http://edn.embarcadero.com/article/27717


編譯出現的問題排除:

USES DesignIntf,DesignEditors
並將 $(DELPHI)\Source\ToolsAPI 的DesignIntf.pas,DesignEditors.pas
放到
$(DELPHI)\Lib
並在PROJECT VIEW SOURCE requires部份加入 designide

轉貼至 http://delphi.ktop.com.tw/board.php?cid=30&fid=71&tid=85713