unit BGLSelectFrm;

interface

uses
  BGLDm,
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ZjGridDBA, ZJGrid, ExtCtrls, ZJCells;

const
  sBGInfo = '当前变更清单：%s 变更数量：%s';

type
  TBGLSelectForm = class(TForm)
    lblBGInfo: TLabel;
    lblBGLTitel: TLabel;
    pnlBGLBar: TPanel;
    zgBGL: TZJGrid;
    btnOk: TButton;
    btnCancel: TButton;
    cbIncludeZeroQuantity: TCheckBox;
    procedure zgBGLCellCanEdit(Sender: TObject; const ACoord: TPoint;
      var Allow: Boolean);
    procedure btnOkClick(Sender: TObject);
    procedure zgBGLCellGetColor(Sender: TObject; ACoord: TPoint;
      var AColor: TColor);
    procedure zgBGLCellTextChanging(Sender: TObject; const ACoord: TPoint;
      var NewValue: String; var Accept: Boolean);
    procedure zgBGLCellValueChanged(Sender: TObject);
    procedure cbIncludeZeroQuantityClick(Sender: TObject);
  private
    FOrgBGL: TBGLSelectInfo;
    FProjectData: TObject;
    FBGLData: TBGLData;
    FGclCode: string;
    FBGNum: Double;

    FHasBGNum: Boolean;

    function GetTotalBGNum: Double;

    procedure InitBGList;
    function GetIncludeZeroQuantity: Boolean;
  public
    procedure Init(AOrgBGL: TBGLSelectInfo; ProjectData: TObject; ABGNum: Double);
    procedure LoadCurBGL(ACurBGL: TBGLSelectInfo);

    property HasBGNum: Boolean read FHasBGNum write FHasBGNum;
    property IncludeZeroQuantity: Boolean read GetIncludeZeroQuantity;
  end;

function SelectBGL(AOrgBGL, ACurBGL: TBGLSelectInfo; AProjectData: TObject): Boolean;
function SelectBGLAndBGNum(AOrgBGL, ACurBGL: TBGLSelectInfo; AProjectData: TObject): Boolean;

implementation

uses
  Math, ProjectData, sdIDTree, UtilMethods, ZhAPI;

{$R *.dfm}

function SelectBGL(AOrgBGL, ACurBGL: TBGLSelectInfo; AProjectData: TObject): Boolean;
var
  FBGLSelectForm: TBGLSelectForm;
begin
  FBGLSelectForm := TBGLSelectForm.Create(nil);
  try
    FBGLSelectForm.HasBGNum := True;
    FBGLSelectForm.Init(AOrgBGL, AProjectData, ACurBGL.TotalNum);
    if FBGLSelectForm.ShowModal = mrOk then
    begin
      Result := True;
      FBGLSelectForm.LoadCurBGL(ACurBGL);
    end
    else
      Result := False;
  finally
    FBGLSelectForm.Free;
  end;
end;

function SelectBGLAndBGNum(AOrgBGL, ACurBGL: TBGLSelectInfo; AProjectData: TObject): Boolean;
var
  FBGLSelectForm: TBGLSelectForm;
begin
  FBGLSelectForm := TBGLSelectForm.Create(nil);
  try
    FBGLSelectForm.HasBGNum := False;
    FBGLSelectForm.Init(AOrgBGL, AProjectData, ACurBGL.TotalNum);
    if FBGLSelectForm.ShowModal = mrOk then
    begin
      Result := True;
      FBGLSelectForm.LoadCurBGL(ACurBGL);
    end
    else
      Result := False;
  finally
    FBGLSelectForm.Free;
  end;
end;

{ TBGLSelectForm }

procedure TBGLSelectForm.Init(AOrgBGL: TBGLSelectInfo;
  ProjectData: TObject; ABGNum: Double);
begin
  ClientHeight := 281;
  ClientWidth := 475;
  FProjectData := ProjectData;
  with TProjectData(FProjectData).BillsMeasureData.BillsMeasureTree do
    FGclCode := Selected.Rec.ValueByName('B_Code').AsString;
  FBGLData := TProjectData(FProjectData).BGLData;
  FOrgBGL := AOrgBGL;
  FBGNum := ABGNum;
  lblBGInfo.Caption := Format(sBGInfo, [FGclCode, FloatToStr(FBGNum)]);
  InitBGList;
end;

procedure TBGLSelectForm.InitBGList;

  procedure InitBGListHead;
  begin
    zgBGL.ColCount := 6;
    zgBGL.CellClass.Cols[1] := TZjCheckBoxCell;
    zgBGL.Cells[1, 0].Text := '选择';
    zgBGL.ColWidths[1] := 35;
    zgBGL.Cells[2, 0].Text := '变更令号';
    zgBGL.ColWidths[2] := 90;
    zgBGL.Cells[3, 0].Text := '名称';
    zgBGL.ColWidths[3] := 150;
    zgBGL.Cells[4, 0].Text := '可变更数量';
    zgBGL.ColWidths[4] := 80;
    zgBGL.Cells[5, 0].Text := '变更数量';
    zgBGL.ColWidths[5] := 60;
    zgBGL.RowCount := 1;
  end;

  function GetOrgQuantity(const ABGLCode: string): Double;
  var
    I: Integer;
  begin
    Result := 0;
    for I := 0 to FOrgBGL.Count - 1 do
    begin
      if SameText(FOrgBGL.Codes[I], ABGLCode) then
      begin
        Result := StrToFloatDef(FOrgBGL.Nums[I], 0);
        Break;
      end;
    end;
  end;

  procedure AddBGL;
  var
    fValidQuantity: Double;
  begin
    with FBGLData do
    begin
      fValidQuantity := QuantityRoundTo(
          cdsBGBillsQuantity.AsFloat - cdsBGBillsUsedQuantity.AsFloat
          + GetOrgQuantity(cdsBGLCode.AsString));
      if not IncludeZeroQuantity and (fValidQuantity = 0) then Exit;

      zgBGL.RowCount := zgBGL.RowCount + 1;
      zgBGL.Cells[2, zgBGL.RowCount -1].Text := cdsBGLCode.AsString;
      zgBGL.Cells[3, zgBGL.RowCount -1].Text := cdsBGLName.AsString;
      zgBGL.Cells[4, zgBGL.RowCount -1].Text := FloatToStr(fValidQuantity);
      zgBGL.Rows[zgBGL.RowCount -1].Data := Pointer(cdsBGBillsID.AsInteger);
    end;
  end;

begin
  InitBGListHead;
  FBGLData.cdsBGL.First;
  while not FBGLData.cdsBGL.Eof do
  begin
    FBGLData.cdsBGBills.Filter := 'BGID = ' + IntToStr(FBGLData.cdsBGLID.AsInteger);
    FBGLData.cdsBGBills.Filtered := True;
    try
      FBGLData.cdsBGBills.First;
      while not FBGLData.cdsBGBills.Eof do
      begin
        if SameText(FBGLData.cdsBGBillsB_Code.AsString, FOrgBGL.B_Code) and
           SameText(FBGLData.cdsBGBillsName.AsString, FOrgBGL.Name) and
           SameText(FBGLData.cdsBGBillsUnits.AsString, FOrgBGL.Units) and
           (PriceRoundTo(FBGLData.cdsBGBillsPrice.AsFloat - FOrgBGL.Price) = 0) then
          AddBGL;
        FBGLData.cdsBGBills.Next;
      end;
    finally
      FBGLData.cdsBGBills.Filtered := False;
    end;
    FBGLData.cdsBGL.Next;
  end;
end;

procedure TBGLSelectForm.LoadCurBGL(ACurBGL: TBGLSelectInfo);
var
  iRowIndex: Integer;
begin
  ACurBGL.TotalNum := GetTotalBGNum;
  for iRowIndex := 0 to zgBGL.RowCount - 1 do
    if zgBGL.Cells[2, iRowIndex].Text <> '' then
    begin
      if SameText(zgBGL.Cells[1, iRowIndex].Text, 'True') then
      begin
        ACurBGL.Codes.Add(zgBGL.Cells[2, iRowIndex].Text);
        ACurBGL.Nums.Add(zgBGL.Cells[5, iRowIndex].Text);
      end;
    end;
end;

procedure TBGLSelectForm.zgBGLCellCanEdit(Sender: TObject;
  const ACoord: TPoint; var Allow: Boolean);
begin
  Allow := (ACoord.X = 1) or
    ((ACoord.X = 5) and SameText(zgBGL.Cells[1, ACoord.Y].Text, 'True'));
end;

procedure TBGLSelectForm.btnOkClick(Sender: TObject);

  function CheckSelect: Boolean;
  var
    iRowIndex: Integer;
  begin
    Result := False;
    for iRowIndex := 0 to zgBGL.RowCount - 1 do
      if zgBGL.Cells[2, iRowIndex].Text <> '' then
        if SameText(zgBGL.Cells[1, iRowIndex].Text, 'True') then
        begin
          Result := True;
          Break;
        end;
  end;

begin
  if not CheckSelect then
    ErrorMessage('请选择变更令！')
  else if (FBGNum <> GetTotalBGNum) then
    ErrorMessage('所选变更令的变更数量合计必须等于清单的变更数量')
  else
    ModalResult := mrOk;
end;

function TBGLSelectForm.GetTotalBGNum: Double;
var
  iRowIndex: Integer;
begin
  Result := 0;
  for iRowIndex := 0 to zgBGL.RowCount - 1 do
    if zgBGL.Cells[2, iRowIndex].Text <> '' then
      if SameText(zgBGL.Cells[1, iRowIndex].Text, 'True') then
        Result := Result + StrToFloatDef(zgBGL.Cells[5, iRowIndex].Text, 0);
end;

procedure TBGLSelectForm.zgBGLCellGetColor(Sender: TObject; ACoord: TPoint;
  var AColor: TColor);
var
  fValidValue, fValue: Double;
begin
  if ACoord.X = 5 then
  begin
    fValidValue := StrToFloatDef(zgBGL.Cells[4, ACoord.Y].Text, 0);
    fValue := StrToFloatDef(zgBGL.Cells[5, ACoord.Y].Text, 0);
    if ((fValidValue > 0) and (fValue > fValidValue)) or
        ((fValidValue < 0) and (fValue < fValidValue)) then
      AColor := clRed;
  end;
end;

procedure TBGLSelectForm.zgBGLCellTextChanging(Sender: TObject;
  const ACoord: TPoint; var NewValue: String; var Accept: Boolean);

  procedure AutoGetBGNum(ARowIndex: Integer);
  var
    fAvailableNum: Double;
  begin
    if HasBGNum then
      fAvailableNum := FBGNum - GetTotalBGNum
    else
      fAvailableNum := StrToFloatDef(zgBGL.Cells[4, ARowIndex].Text, 0);
    // 当变更数量为负数时, 例如-60，但计算得到可变更数量为-80，此时应取两值中较大的-60
    if FBGNum < 0 then
      zgBGL.Cells[5, ARowIndex].Text := FloatToStr(
        Max(fAvailableNum, StrToFloatDef(zgBGL.Cells[4, ARowIndex].Text, 0)))
    else
      zgBGL.Cells[5, ARowIndex].Text := FloatToStr(
        Min(fAvailableNum, StrToFloatDef(zgBGL.Cells[4, ARowIndex].Text, 0)));
  end;

begin
  if ACoord.X = 1 then
    if NewValue = 'True' then
      AutoGetBGNum(ACoord.Y)
    else
      zgBGL.Cells[5, ACoord.Y].Text := '';
end;

procedure TBGLSelectForm.zgBGLCellValueChanged(Sender: TObject);

  procedure RefreshBGNum;
  begin
    FBGNum := GetTotalBGNum;
    lblBGInfo.Caption := Format(sBGInfo, [FGclCode, FloatToStr(FBGNum)]);
  end;

var
  fCur, fValid: Double;
begin
  if zgBGL.CurCol = 5 then
  begin
    zgBGL.OnCellValueChanged := nil;
    if zgBGL.Cells[5, zgBGL.CurRow].Text <> '' then
    begin
      fCur := QuantityRoundTo(StrToFloatDef(zgBGL.Cells[5, zgBGL.CurRow].Text, 0));
      fValid := StrToFloatDef(zgBGL.Cells[4, zgBGL.CurRow].Text, 0);
      if ((fValid >= 0) and (QuantityRoundTo(fValid - fCur) >= 0))) or
         ((fValid < 0) and (QuantityRoundTo(fCur - fValid) >= 0))) then
        zgBGL.Cells[5, zgBGL.CurRow].Text := FloatToStr(fCur)
      else
      begin
        ErrorMessage('当前输入的变更数量大于可变更数量，请重新输入！');
        zgBGL.Cells[5, zgBGL.CurRow].Text := '';
      end;
    end;
    zgBGL.OnCellValueChanged := zgBGLCellValueChanged;
  end;
  if not HasBGNum and ((zgBGL.CurCol = 1) or (zgBGL.CurCol = 5)) then
    RefreshBGNum;
end;

procedure TBGLSelectForm.cbIncludeZeroQuantityClick(Sender: TObject);
begin
  InitBGList;
end;

function TBGLSelectForm.GetIncludeZeroQuantity: Boolean;
begin
  Result := cbIncludeZeroQuantity.Checked;
end;

end.