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unit cxSelectEditRepositoryItem;

{$I cxVer.inc}

interface

uses
  Windows, SysUtils, Classes, Controls, Forms, StdCtrls, cxClasses, cxEdit,
  ExtCtrls;

type
  TcxSelectRepositoryItemSetup = record
    TopIndex: Integer;
    Selected: Integer;
    List: TcxRegisteredClasses;
    Pos: TPoint;
  end;

  TcxSelectRepositoryItem = class(TForm)
    lbItems: TListBox;
    Panel1: TPanel;
    lbHint: TLabel;
    Label1: TLabel;
    btOk: TButton;
    btCancel: TButton;
    procedure lbItemsClick(Sender: TObject);
    procedure lbItemsMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    FList: TcxRegisteredClasses;
    procedure Setup(const AData: TcxSelectRepositoryItemSetup);
    procedure SaveSetup(var AData: TcxSelectRepositoryItemSetup);
  end;

function GetEditRepositoryItemClass(
  var ASetupData: TcxSelectRepositoryItemSetup): TcxEditRepositoryItemClass;

implementation

{$R *.dfm}

function GetEditRepositoryItemClass(
  var ASetupData: TcxSelectRepositoryItemSetup): TcxEditRepositoryItemClass;
var
  ASelectRepositoryItem: TcxSelectRepositoryItem;
begin
  Result := nil;
  ASelectRepositoryItem := TcxSelectRepositoryItem.Create(nil);
  try
    ASelectRepositoryItem.Setup(ASetupData);
    if ASelectRepositoryItem.ShowModal = mrOk then
      Result := TcxEditRepositoryItemClass(
        ASelectRepositoryItem.lbItems.Items.Objects[ASelectRepositoryItem.lbItems.ItemIndex]);
    ASelectRepositoryItem.SaveSetup(ASetupData);
  finally
    ASelectRepositoryItem.Release;
  end;
end;

procedure TcxSelectRepositoryItem.lbItemsClick(Sender: TObject);
begin
  btOk.Enabled := lbItems.ItemIndex <> -1;
  if btOk.Enabled then
    lbHint.Caption := FList.GetHintByClass(
      TcxEditRepositoryItemClass(lbItems.Items.Objects[lbItems.ItemIndex]))
  else
    lbHint.Caption := '';
end;

procedure TcxSelectRepositoryItem.lbItemsMouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
  if (ssDouble in Shift) and (mbLeft = Button) and
    (lbItems.ItemAtPos(Point(X, Y), True) <> -1) then ModalResult := mrOk;
end;

procedure TcxSelectRepositoryItem.Setup(const AData: TcxSelectRepositoryItemSetup);
var
  I: Integer;
begin
  with AData do
  begin
    FList := List;
    for I := 0 to List.Count - 1 do
      lbItems.Items.AddObject(List.Descriptions[I], TObject(List[I]));
    if (Pos.X = -1) and (Pos.Y = -1) then Position := poScreenCenter
    else
    begin
      Left := Pos.X;
      Top := Pos.Y;
    end;
    lbItems.TopIndex := TopIndex;
    if (Selected = -1) or ((Selected > 0) and (Selected < List.Count)) then
      lbItems.ItemIndex := Selected;
    lbItemsClick(nil);
  end;
end;

procedure TcxSelectRepositoryItem.SaveSetup(var AData: TcxSelectRepositoryItemSetup);
begin
  with AData do
  begin
    Pos := Point(Left, Top);
    Selected := lbItems.ItemIndex;      
    TopIndex := lbItems.TopIndex;
  end;
end;

end.