unit SmtFltr;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, System.UITypes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.Grids, Vcl.DBGrids, Data.DB,
  Data.Win.ADODB, Vcl.ExtCtrls, Vcl.StdCtrls, Vcl.Buttons, Vcl.Menus,Vcl.DBCtrls;

type
  TPanel1 = class(TPanel)
    Label1: TLabel;
    ComboBox1: TComboBox;
    Button1: TButton;
    Button2: TButton;
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    BitBtn3: TBitBtn;
    BitBtn4: TBitBtn;
    Button3: TButton;
    Panel2: TPanel;
    CheckBox1: TCheckBox;
    FontDialog1: TFontDialog;
    procedure BitBtn3Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn4Click(Sender: TObject);
    procedure GridTitleClick(Column: TColumn);
    procedure Button3Click(Sender: TObject);
    procedure Button3KeyPress(Sender: TObject; var Key: Char);
    procedure Button3Exit(Sender: TObject);
    procedure ComboBox1KeyPress(Sender: TObject; var Key: Char);
    procedure ComboBox1Change(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  procedure Register;

var
  Panel1:  TPanel1;
  GrName, FldName, FldType, Fltr, FltrAdd: string;

implementation

{$R *.dfm}

procedure Register;
begin
  RegisterComponents('New7', [TPanel1]);
end;

procedure TPanel1.BitBtn1Click(Sender: TObject);
Var
  AGrid :TDBGrid;
begin
  AGrid:=Screen.ActiveForm.FindComponent(GrName) as TDBGrid;
  if Length(ComboBox1.text)>0 then
    Begin
      if AGrid.SelectedField.DataType=ftString then
        Begin
          FltrAdd:=FldName+' like %'+ComboBox1.text+'%';
        End
      else
          FltrAdd:=ComboBox1.text;
      if (CheckBox1.Checked) and (Length(Fltr)>0) then
        Fltr:=Fltr+' And '+FltrAdd
      Else
        Fltr:= FltrAdd;
      BitBtn1.Hint:='Установить фильтр '+Fltr;
      ComboBox1.Text:='';
    End;

  AGrid.DataSource.DataSet.Filter:=Fltr;
  AGrid.DataSource.DataSet.Filtered:=True;
end;

procedure TPanel1.BitBtn2Click(Sender: TObject);
...

end.