unit tpPricePartSettingFrm;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls, ComCtrls;

const
  sPegIgnoreHint = '各桩号间可能存在重叠，可通过该项设置多少m重叠忽略不计' + #13#10 +
                   '如果要求重叠桩号划分为1个标段，可设置为0。';

type
  TPricePartInfo = class
  private
    FPartPrice: Double;
    FMinLength: Integer;
    FMinStep: Integer;
  public
    constructor Create;

    property PartPrice: Double read FPartPrice write FPartPrice;
    property MinLength: Integer read FMinLength write FMinLength;
    property MinStep: Integer read FMinStep write FMinStep;
  end;

  TtpPricePartSettingForm = class(TForm)
    lePartTotalPrice: TLabeledEdit;
    lblFormat: TLabel;
    btnOk: TButton;
    btnCancel: TButton;
    leMinLength: TLabeledEdit;
    udMinLength: TUpDown;
    leMinStep: TLabeledEdit;
    udMinStep: TUpDown;
    procedure btnOkClick(Sender: TObject);
    procedure lePartTotalPriceChange(Sender: TObject);
    procedure lePartTotalPriceKeyPress(Sender: TObject; var Key: Char);
  private
    function GetPartPrice: Double;
    function GetMinLength: Integer;
    function GetMinStep: Integer;
  public
    constructor Create(AInfo: TPricePartInfo);
    destructor Destroy; override;

    property PartPrice: Double read GetPartPrice;
    property MinLength: Integer read GetMinLength;
    property MinStep: Integer read GetMinStep;
  end;

function PricePartSetting(AInfo: TPricePartInfo): Boolean;

implementation

uses
  UtilMethods;

function PricePartSetting(AInfo: TPricePartInfo): Boolean;
var
  SettingForm: TtpPricePartSettingForm;
begin
  SettingForm := TtpPricePartSettingForm.Create(AInfo);
  try
    Result := SettingForm.ShowModal = mrOk;
    if Result then
    begin
      AInfo.PartPrice := SettingForm.PartPrice;
      AInfo.MinLength := SettingForm.MinLength;
      AInfo.MinStep := SettingForm.MinStep;
    end;
  finally
    SettingForm.Free;
  end;
end;

{$R *.dfm}

{ TtpPricePartSettingForm }

constructor TtpPricePartSettingForm.Create(AInfo: TPricePartInfo);
begin
  inherited Create(nil);
  if AInfo.PartPrice > 0 then
    lePartTotalPrice.Text := FloatToStr(AInfo.PartPrice)
  else
    lePartTotalPrice.Text := '';
  udMinLength.Position := AInfo.MinLength;
  udMinStep.Position := AInfo.MinStep;

  SetWindowLong(lePartTotalPrice.Handle, GWL_STYLE, GetWindowLong(lePartTotalPrice.Handle, GWL_STYLE) or ES_RIGHT);
  SetWindowLong(leMinLength.Handle, GWL_STYLE, GetWindowLong(leMinLength.Handle, GWL_STYLE) or ES_RIGHT);
  SetWindowLong(leMinStep.Handle, GWL_STYLE, GetWindowLong(leMinStep.Handle, GWL_STYLE) or ES_RIGHT);
end;

destructor TtpPricePartSettingForm.Destroy;
begin
  inherited;
end;

function TtpPricePartSettingForm.GetPartPrice: Double;
begin
  Result := StrToFloatDef(lePartTotalPrice.Text, 0);
end;

procedure TtpPricePartSettingForm.btnOkClick(Sender: TObject);
begin
  if PartPrice <= 0 then
    TipMessage('单标段目标金额应大于0。')
  else
    ModalResult := mrOk;
end;

procedure TtpPricePartSettingForm.lePartTotalPriceChange(Sender: TObject);
begin
  lblFormat.Visible :=  PartPrice > 0;
  lblFormat.Caption := FormatFloat('##,###,###,###.##', PartPrice);
end;

procedure TtpPricePartSettingForm.lePartTotalPriceKeyPress(Sender: TObject;
  var Key: Char);
begin
  if not (Key in ['0'..'9', '.', #8, #13]) then
    Key := #0;
end;

function TtpPricePartSettingForm.GetMinLength: Integer;
begin
  Result := udMinLength.Position;
end;

function TtpPricePartSettingForm.GetMinStep: Integer;
begin
  Result := udMinStep.Position;
end;

{ TPricePartInfo }

constructor TPricePartInfo.Create;
begin
  FPartPrice := 0;
  FMinLength := 5;
  FMinStep := 100;
end;

end.