unit LifeTableUnit;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
  StdCtrls, Buttons, ExtCtrls, Grids, MainUnit, Globals, FunctionsLib,
  OutPutUnit, DictionaryUnit, DataProcs, GraphLib, contexthelpunit;

type

  { TLifeTableForm }

  TLifeTableForm = class(TForm)
    HelpBtn: TButton;
    CancelBtn: TButton;
    CIEdit: TEdit;
    Label7: TLabel;
    NoCensoredEdit: TEdit;
    Label6: TLabel;
    NoDiedEdit: TEdit;
    Label5: TLabel;
    NoAliveEdit: TEdit;
    Label4: TLabel;
    ObsEndEdit: TEdit;
    Label3: TLabel;
    ObsStartEdit: TEdit;
    Label2: TLabel;
    ObsStartInBtn: TBitBtn;
    ObsEndInBtn: TBitBtn;
    AliveInBtn: TBitBtn;
    NoDiedInBtn: TBitBtn;
    NoCensoredInBtn: TBitBtn;
    ObsStartOutBtn: TBitBtn;
    ObsEndOutBtn: TBitBtn;
    AliveOutBtn: TBitBtn;
    NoDiedOutBtn: TBitBtn;
    NoCensoredOutBtn: TBitBtn;
    ResetBtn: TButton;
    ComputeBtn: TButton;
    ReturnBtn: TButton;
    Label1: TLabel;
    Memo1: TMemo;
    Grid: TStringGrid;
    VarList: TListBox;
    procedure AliveInBtnClick(Sender: TObject);
    procedure AliveOutBtnClick(Sender: TObject);
    procedure ComputeBtnClick(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure HelpBtnClick(Sender: TObject);
    procedure NoCensoredInBtnClick(Sender: TObject);
    procedure NoCensoredOutBtnClick(Sender: TObject);
    procedure NoDiedInBtnClick(Sender: TObject);
    procedure NoDiedOutBtnClick(Sender: TObject);
    procedure ObsEndInBtnClick(Sender: TObject);
    procedure ObsEndOutBtnClick(Sender: TObject);
    procedure ObsStartInBtnClick(Sender: TObject);
    procedure ObsStartOutBtnClick(Sender: TObject);
    procedure ResetBtnClick(Sender: TObject);
  private
    { private declarations }
//    NoCases : integer;

  public
    { public declarations }
  end; 

var
  LifeTableForm: TLifeTableForm;

implementation

{ TLifeTableForm }

procedure TLifeTableForm.FormShow(Sender: TObject);

begin
     ResetBtnClick(self);
end;

procedure TLifeTableForm.HelpBtnClick(Sender: TObject);
begin
  ContextHelpForm.HelpMessage((Sender as TButton).tag);
end;

procedure TLifeTableForm.NoCensoredInBtnClick(Sender: TObject);
VAR index : integer;
begin
  index := VarList.ItemIndex;
  NoCensoredEdit.Text := VarList.Items.Strings[index];
  NoCensoredInBtn.Visible := false;
  NoCensoredOutBtn.Visible := true;
  VarList.Items.Delete(index);
end;

procedure TLifeTableForm.NoCensoredOutBtnClick(Sender: TObject);
begin
  VarList.Items.Add(NoCensoredEdit.Text);
  NoCensoredEdit.Text := '';
  NoCensoredOutBtn.Visible := false;
  NoCensoredInBtn.Visible := true;
end;

procedure TLifeTableForm.NoDiedInBtnClick(Sender: TObject);
VAR index : integer;
begin
  index := VarList.ItemIndex;
  NoDiedEdit.Text := VarList.Items.Strings[index];
  NoDiedInBtn.Visible := false;
  NoDiedOutBtn.Visible := true;
  VarList.Items.Delete(index);
end;

procedure TLifeTableForm.NoDiedOutBtnClick(Sender: TObject);
begin
  VarList.Items.Add(NoDiedEdit.Text);
  NoDiedEdit.Text := '';
  NoDiedOutBtn.Visible := false;
  NoDiedInBtn.Visible := true;
end;

procedure TLifeTableForm.AliveInBtnClick(Sender: TObject);
VAR index : integer;
begin
  index := VarList.ItemIndex;
  NoAliveEdit.Text := VarList.Items.Strings[index];
  AliveInBtn.Visible := false;
  AliveOutBtn.Visible := true;
  VarList.Items.Delete(index);
end;

procedure TLifeTableForm.AliveOutBtnClick(Sender: TObject);
begin
  VarList.Items.Add(NoAliveEdit.Text);
  NoAliveEdit.Text := '';
  AliveInBtn.Visible := true;
  AliveOutBtn.Visible := false;
end;

procedure TLifeTableForm.ComputeBtnClick(Sender: TObject);
VAR
  i : integer;
  varcols : IntDyneVec;
  AtRisk, ProbDie, CumProbLive, StdErr, Up95, Low95 : double;
  N, P, Q, mu, CI, z : double;
  outline : string;
begin
  CI := StrToFloat(CIEdit.Text);
  z := inversez(CI);
  SetLength(varcols,5);
  for i := 1 to 5 do
  begin
          if (OS3MainFrm.DataGrid.Cells[i,0] = ObsStartEdit.Text) then varcols[0] := i;
          if (OS3MainFrm.DataGrid.Cells[i,0] = ObsEndEdit.Text) then varcols[1] := i;
          if (OS3MainFrm.DataGrid.Cells[i,0] = NoAliveEdit.Text) then varcols[2] := i;
          if (OS3MainFrm.DataGrid.Cells[i,0] = NoDiedEdit.Text) then varcols[3] := i;
          if (OS3MainFrm.DataGrid.Cells[i,0] = NoCensoredEdit.Text) then varcols[4] := i;
  end;

  for i := 1 to NoCases do
  begin
          Grid.Cells[0,i] := 'CASE ' + IntToStr(i);
          Grid.Cells[1,i] := Trim(OS3MainFrm.DataGrid.Cells[varcols[0],i]);
          Grid.Cells[2,i] := Trim(OS3MainFrm.DataGrid.Cells[varcols[1],i]);
          Grid.Cells[3,i] := Trim(OS3MainFrm.DataGrid.Cells[varcols[2],i]);
          Grid.Cells[4,i] := Trim(OS3MainFrm.DataGrid.Cells[varcols[3],i]);
          Grid.Cells[5,i] := Trim(OS3MainFrm.DataGrid.Cells[varcols[4],i]);
  end;
  for i := 1 to NoCases do
  begin
          AtRisk := StrToFloat(Grid.Cells[3,i]);
          AtRisk := AtRisk - (StrToFloat(Grid.Cells[5,i]) / 2.0);
          outline := format('%8.4f',[AtRisk]);
          Grid.Cells[6,i] := outline;
          ProbDie := StrToFloat(Grid.Cells[4,i]) / AtRisk;
          outline := format('%8.4f',[ProbDie]);
          Grid.Cells[7,i] := outline;
          outline := format('%8.4f',[1.0-ProbDie]);
          Grid.Cells[8,i] := outline;
  end;
  N := StrToFloat(Grid.Cells[3,1]);
  Grid.Cells[9,1] := Grid.Cells[8,1];
  P := StrToFloat(Grid.Cells[9,1]);
  Q := 1.0 - P;
  StdErr := sqrt(N * P * Q);
  outline := format('%8.4f',[StdErr]);
  Grid.Cells[10,1] := outline;
  mu := N * P;
  outline := format('%8.4f',[StdErr]);
  Grid.Cells[10,1] := outline;
  Up95 := mu + (z * StdErr);
  Low95 := mu - (z * StdErr);
  outline := format('%8.4f',[Low95]);
  Grid.Cells[11,1] := outline;
  outline := format('%8.3f',[Up95]);
  Grid.Cells[12,1] := outline;

  for i := 2 to NoCases do
  begin
          CumProbLive := StrToFloat(Grid.Cells[9,i-1]) *
             StrToFloat(Grid.Cells[8,i]);
          outline := format('%8.4f',[CumProbLive]);
          Grid.Cells[9,i] := outline;
          P := CumProbLive;
          Q := 1.0 - P;
          StdErr := sqrt(N * P * Q);
          mu := N * P;
          outline := format('%8.4f',[StdErr]);
          Grid.Cells[10,i] := outline;
          Up95 := mu + (z * StdErr);
          Low95 := mu - (z * StdErr);
          outline := format('%8.4f',[Low95]);
          Grid.Cells[11,i] := outline;
          outline := format('%8.3f',[Up95]);
          Grid.Cells[12,i] := outline;
  end;
  varcols := nil;
end;

procedure TLifeTableForm.ObsEndInBtnClick(Sender: TObject);
VAR index : integer;
begin
  index := VarList.ItemIndex;
  ObsEndEdit.Text := VarList.Items.Strings[index];
  ObsEndInBtn.Visible := false;
  ObsEndOutBtn.Visible := true;
  VarList.Items.Delete(index);
end;

procedure TLifeTableForm.ObsEndOutBtnClick(Sender: TObject);
begin
  VarList.Items.Add(ObsEndEdit.Text);
  ObsEndEdit.Text := '';
  ObsEndInBtn.Visible := true;
  ObsEndOutBtn.Visible := false;
end;

procedure TLifeTableForm.ObsStartInBtnClick(Sender: TObject);
  VAR index : integer;
  begin
       index := VarList.ItemIndex;
       ObsStartEdit.Text := VarList.Items.Strings[index];
       ObsStartInBtn.Visible := false;
       ObsStartOutBtn.Visible := true;
       VarList.Items.Delete(index);
end;

procedure TLifeTableForm.ObsStartOutBtnClick(Sender: TObject);
begin
     VarList.Items.Add(ObsStartEdit.Text);
     ObsStartEdit.Text := '';
     ObsStartInBtn.Visible := true;
     ObsStartOutBtn.Visible := false;
end;

procedure TLifeTableForm.ResetBtnClick(Sender: TObject);

VAR i : integer;
    j : integer;
    outline : string;
begin
//  outline := format('NoCases = %d',[NoCases]);
//  ShowMessage(outline);
//  outline := format('No.Variables = %d',[NoVariables]);
//  ShowMessage(outline);
  VarList.Clear;
  ObsStartEdit.Text := '';
  ObsEndEdit.Text := '';
  NoAliveEdit.Text := '';
  NoDiedEdit.Text := '';
  NoCensoredEdit.Text := '';
  ObsStartInBtn.Visible := true;
  ObsStartOutBtn.Visible := false;
  ObsEndInBtn.Visible := true;
  ObsEndOutBtn.Visible := false;
  AliveInBtn.Visible := true;
  AliveOutBtn.Visible := false;
  NoDiedInBtn.Visible := true;
  NoDiedOutBtn.Visible := false;
  NoCensoredInBtn.Visible := true;
  NoCensoredOutBtn.Visible := false;
  Grid.RowCount := NoCases+1;
  Grid.ColCount := 13;
  Grid.Cells[1,0] := 'Obs.Start';
  Grid.Cells[2,0] := 'Obs.End';
  Grid.Cells[3,0] := 'Alive';
  Grid.Cells[4,0] := 'Died';
  Grid.Cells[5,0] := 'Censored';
  Grid.Cells[6,0] := 'At Risk';
  Grid.Cells[7,0] := 'Prob.Die';
  Grid.Cells[8,0] := 'Prob.Alive';
  Grid.Cells[9,0] := 'Cum.P.Alive';
  Grid.Cells[10,0] := 'S.E. Alive';
  Grid.Cells[11,0] := 'Low 95%';
  Grid.Cells[12,0] := 'Hi 95%';
  for i := 0 to 12 do
  begin
    for j := 1 to NoCases do Grid.Cells[i,j] := '';
  end;
       for i := 1 to NoVariables do
          VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
end;


initialization
  {$I lifetableunit.lrs}

end.