unit ColVisibleManager;

interface

uses
  Classes, sdGridDBA, ZhAPI;

type
  TColVisible = class
  private
    FCustom: Boolean;
    // Defualt CaptionAcrossCols
    FDefaultCAC: Integer;
    FDBACol: TsdGridColumn;
  public
    constructor Create(ACol: TsdGridColumn); virtual;

    procedure RefreshVisible; virtual;

    property DBACol: TsdGridColumn read FDBACol;
    property DefaultCAC: Integer read FDefaultCAC;
    property Custom: Boolean read FCustom write FCustom;
  end;

  TBM_ColVisible = class(TColVisible)
  private
    FPriceChange: Boolean;
    FBGLCode: Boolean;
    FAlias: Boolean;
    FDesign: Boolean;
  public
    constructor Create(ACol: TsdGridColumn); override;

    procedure RefreshVisible; override;

    property PriceChange: Boolean read FPriceChange write FPriceChange;
    property BGLCode: Boolean read FBGLCode write FBGLCode;
    property Design: Boolean read FDesign write FDesign;
    property Alias: Boolean read FAlias write FAlias;
  end;

  TColVisibleManager = class
  private
    FColVisibles: TList;
  protected
    function CreateColVisible(ACol: TsdGridColumn): TColVisible; virtual;
  public
    constructor Create(ACols: TsdGridColumnList);
    destructor Destroy; override;

    procedure RefreshVisible;

    procedure ShowGridCol(AShow: Boolean; ABeginCol, AEndCol: Integer);
  end;

  TBM_ColVisibleManager = class(TColVisibleManager)
  protected
    function CreateColVisible(ACol: TsdGridColumn): TColVisible; override;
  public
    procedure ShowPriceChange(AShow: Boolean);
    procedure ShowBGLCode(AShow: Boolean);
    procedure ShowDesign(AShow: Boolean);
    procedure ShowAlias(AShow: Boolean);
  end;

implementation

uses SysUtils;

{ TColVisible }

constructor TColVisible.Create(ACol: TsdGridColumn);
begin
  FDBACol := ACol;
  FDefaultCAC := StrToIntDef(FDBACol.Title.CaptionAcrossCols, 1);
  FCustom := FDBACol.Visible;
end;

procedure TColVisible.RefreshVisible;
begin
  FDBACol.Visible := FCustom;
end;

{ TBM_ColVisible }

constructor TBM_ColVisible.Create(ACol: TsdGridColumn);
begin
  inherited;
  FPriceChange := True;
  FBGLCode := True;
  FDesign := True;
  FAlias := True;
end;

procedure TBM_ColVisible.RefreshVisible;
begin
  FDBACol.Visible := FCustom and FPriceChange and FBGLCode and FDesign and FAlias;
end;

{ TColVisibleManager }

constructor TColVisibleManager.Create(ACols: TsdGridColumnList);
var
  iCol: Integer;
  ColVisible: TColVisible;
begin
  FColVisibles := TList.Create;
  for iCol := 0 to ACols.Count - 1 do
  begin
    ColVisible := CreateColVisible(ACols.Items[iCol]);
    FColVisibles.Add(ColVisible);
  end;
end;

function TColVisibleManager.CreateColVisible(
  ACol: TsdGridColumn): TColVisible;
begin
  Result := TColVisible.Create(ACol);
end;

destructor TColVisibleManager.Destroy;
begin
  ClearObjects(FColVisibles);
  FColVisibles.Free;
  inherited;
end;

procedure TColVisibleManager.RefreshVisible;
var
  iCol: Integer;
begin
  for iCol := 0 to FColVisibles.Count - 1 do
    TColVisible(FColVisibles.Items[iCol]).RefreshVisible;
end;

procedure TColVisibleManager.ShowGridCol(AShow: Boolean; ABeginCol,
  AEndCol: Integer);
var
  iCol, iRelaCol: Integer;
  vCol, vRelaCol: TColVisible;
begin
  for iCol := ABeginCol to AEndCol do
  begin
    vCol := TColVisible(FColVisibles.Items[iCol]);
    if Pos('|', vCol.DBACol.Title.Caption) <> 1 then
    begin
      vCol.Custom := AShow;
      if vCol.DefaultCAC > 1 then
      begin
        for iRelaCol := 1 to vCol.DefaultCAC - 1 do
        begin
          vRelaCol := TColVisible(FColVisibles.Items[iCol+iRelaCol]);
          vRelaCol.Custom := AShow;
        end;
      end;
    end;
  end;
  RefreshVisible;
end;

{ TBM_ColVisibleManager }

function TBM_ColVisibleManager.CreateColVisible(
  ACol: TsdGridColumn): TColVisible;
begin
  Result := TBM_ColVisible.Create(ACol);
end;

procedure TBM_ColVisibleManager.ShowAlias(AShow: Boolean);
var
  iCol: Integer;
  vCol: TBM_ColVisible;
begin
  for iCol := 0 to FColVisibles.Count - 1 do
  begin
    vCol := TBM_ColVisible(FColVisibles.Items[iCol]);
    if SameText('Alias', vCol.DBACol.FieldName) then
      vCol.FAlias := AShow;
  end;
  RefreshVisible;
end;

procedure TBM_ColVisibleManager.ShowBGLCode(AShow: Boolean);
var
  iCol: Integer;
  vCol: TBM_ColVisible;
begin
  for iCol := 0 to FColVisibles.Count - 1 do
  begin
    vCol := TBM_ColVisible(FColVisibles.Items[iCol]);
    if SameText('CurQcQuantity', vCol.DBACol.FieldName) or
        SameText('CurPcQuantity', vCol.DBACol.FieldName) then
    begin
      if AShow then
        vCol.DBACol.Title.CaptionAcrossCols := '3'
      else
        vCol.DBACol.Title.CaptionAcrossCols := '2';
    end
    else if Pos('BGLCode', vCol.DBACol.FieldName) > 1 then
      vCol.FBGLCode := AShow;
  end;
  RefreshVisible;
end;

procedure TBM_ColVisibleManager.ShowDesign(AShow: Boolean);
var
  iCol: Integer;
  vCol: TBM_ColVisible;
begin
  for iCol := 0 to FColVisibles.Count - 1 do
  begin
    vCol := TBM_ColVisible(FColVisibles.Items[iCol]);
    if Pos('Dgn', vCol.DBACol.FieldName) > 1 then
      vCol.FDesign := AShow;
  end;
  RefreshVisible;
end;

procedure TBM_ColVisibleManager.ShowPriceChange(AShow: Boolean);
var
  iCol: Integer;
  vCol: TBM_ColVisible;
begin
  for iCol := 0 to FColVisibles.Count - 1 do
  begin
    vCol := TBM_ColVisible(FColVisibles.Items[iCol]);
    if SameText(vCol.DBACol.FieldName, 'NewPrice') or
        (Pos('CurPc', vCol.DBACol.FieldName) = 1) or
        (Pos('EndPc', vCol.DBACol.FieldName) = 1) or
        (Pos('AddPc', vCol.DBACol.FieldName) = 1) then
      vCol.PriceChange := AShow;
  end;
  RefreshVisible;
end;

end.