unit ConvertGrid3MasterDetailDemoMain;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
  Dialogs, cxGridLevel, cxControls, cxGrid, StdCtrls, ExtCtrls, Menus,
  ImgList, ActnList, cxGridCustomTableView, cxGridTableView,
  cxGridDBTableView, cxGridCustomView, ComCtrls, cxStyles, cxCustomData,
  cxGraphics, cxFilter, cxData, cxEdit, DB, cxDBData, cxClasses,
  cxLookAndFeels;

type
  TConvertGrid3MasterDetailDemoMainForm = class(TForm)
    mmMain: TMainMenu;
    miFile: TMenuItem;
    miExit: TMenuItem;
    miOptions: TMenuItem;
    miGrid4: TMenuItem;
    miAbout: TMenuItem;
    StatusBar: TStatusBar;
    lbDescrip: TLabel;
    miGrid4MasterDetailStyle: TMenuItem;
    miGrid3MasterDetailStyle: TMenuItem;
    pnlGrids: TPanel;
    LookAndFeelController: TcxLookAndFeelController;
    procedure miAboutClick(Sender: TObject);
    procedure miExitClick(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure miMasterDetailStyleClick(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
  private
    procedure SetGrid3MasterDetailStyle; // Standard two grid style
    procedure SetGrid4MasterDetailStyle;    // Grid4 single grid style
  end;

var
  ConvertGrid3MasterDetailDemoMainForm: TConvertGrid3MasterDetailDemoMainForm;

implementation

{$R *.dfm}

uses
  cxGridDBDataDefinitions, ConvertGrid3MasterDetailDemoData,
  ConvertGrid3MasterDetailDemoGrids, AboutDemoForm;

procedure TConvertGrid3MasterDetailDemoMainForm.miAboutClick(Sender: TObject);
begin
  ShowAboutDemoForm;
end;

procedure TConvertGrid3MasterDetailDemoMainForm.miExitClick(Sender: TObject);
begin
  Close;
end;

procedure TConvertGrid3MasterDetailDemoMainForm.SetGrid4MasterDetailStyle;
// Display in Grid4 single grid style
begin
  // remove master/detail link in the data module
  ConvertGrid3MasterDetailDemoDataDM.tblOrders.MasterSource := nil;

  ConvertGrid3MasterDetailDemoGridsForm.dxDBGridCars.DataSource := nil;
  ConvertGrid3MasterDetailDemoGridsForm.dxDBGridOrders.DataSource := nil;
  ConvertGrid3MasterDetailDemoGridsForm.cxGrid1DBBandedTableView1.DataController.DataSource :=
    ConvertGrid3MasterDetailDemoDataDM.dsCars;
  ConvertGrid3MasterDetailDemoGridsForm.cxGrid1DBTableView1.DataController.DataSource :=
    ConvertGrid3MasterDetailDemoDataDM.dsOrders;

  with ConvertGrid3MasterDetailDemoGridsForm do
  begin
    tsGrid4Mode.Parent := pnlGrids;
    tsGrid4Mode.Visible := True;
    tsGrid3Mode.Parent := pcGrids;
  end;
end;

procedure TConvertGrid3MasterDetailDemoMainForm.SetGrid3MasterDetailStyle;
// Display in standard two grid style
begin
  ConvertGrid3MasterDetailDemoGridsForm.cxGrid1DBBandedTableView1.DataController.DataSource := nil;
  ConvertGrid3MasterDetailDemoGridsForm.cxGrid1DBTableView1.DataController.DataSource := nil;
  ConvertGrid3MasterDetailDemoGridsForm.dxDBGridCars.DataSource :=
    ConvertGrid3MasterDetailDemoDataDM.dsCars;
  ConvertGrid3MasterDetailDemoGridsForm.dxDBGridOrders.DataSource :=
    ConvertGrid3MasterDetailDemoDataDM.dsOrders;

  // restore master/detail link in the data module
  ConvertGrid3MasterDetailDemoDataDM.tblOrders.MasterSource :=
    ConvertGrid3MasterDetailDemoDataDM.dsCars;

  with ConvertGrid3MasterDetailDemoGridsForm do
  begin
    tsGrid3Mode.Parent := pnlGrids;
    tsGrid3Mode.Visible := True;
    tsGrid4Mode.Parent := pcGrids;
  end;
end;

procedure TConvertGrid3MasterDetailDemoMainForm.FormShow(Sender: TObject);
begin
  miMasterDetailStyleClick(miGrid3MasterDetailStyle);
end;

procedure TConvertGrid3MasterDetailDemoMainForm.miMasterDetailStyleClick(
  Sender: TObject);
begin
  TMenuItem(Sender).Checked := True;
  Case TMenuItem(Sender).Tag of
    0: SetGrid4MasterDetailStyle;
    1: SetGrid3MasterDetailStyle;
  end
end;

procedure TConvertGrid3MasterDetailDemoMainForm.FormCloseQuery(
  Sender: TObject; var CanClose: Boolean);
begin
  SetGrid3MasterDetailStyle;
end;

end.