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(* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is TurboPower SysTools
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*
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* The Initial Developer of the Original Code is
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* TurboPower Software
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*
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* Portions created by the Initial Developer are Copyright (C) 1996-2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* ***** END LICENSE BLOCK ***** *)
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unit monycalc0;
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interface
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uses
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Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
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StdCtrls,
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StDecMth, StMoney;
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const
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DefaultCurrency = 'USD';
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BaseFormCaption = 'Money Calculator';
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type
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MoneyCharSet = set of Char;
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MoneyOperSet = set of Char;
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type
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TMoneyCalcDlg = class(TForm)
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GroupBox1: TGroupBox;
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Edit1: TEdit;
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ZeroBtn: TButton;
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DecKey: TButton;
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ThreeKey: TButton;
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OneKey: TButton;
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TwoKey: TButton;
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SixKey: TButton;
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FourKey: TButton;
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FiveKey: TButton;
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NineKey: TButton;
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SevenKey: TButton;
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EightKey: TButton;
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AddBtn: TButton;
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SubBtn: TButton;
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MulBtn: TButton;
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DivBtn: TButton;
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PlusMinusBtn: TButton;
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ClearBtn: TButton;
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EqualBtn: TButton;
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ClearEntryBtn: TButton;
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GroupBox2: TGroupBox;
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Label1: TLabel;
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ComboBox1: TComboBox;
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ComboBox2: TComboBox;
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ConvertBtn: TButton;
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ListBox1: TListBox;
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ListBox2: TListBox;
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Button1: TButton;
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Memo1: TMemo;
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procedure NumBtnClick(Sender: TObject);
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procedure DecKeyClick(Sender: TObject);
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procedure ClearBtnClick(Sender: TObject);
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procedure ClearEntryBtnClick(Sender: TObject);
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procedure AddBtnClick(Sender: TObject);
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procedure SubBtnClick(Sender: TObject);
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procedure MulBtnClick(Sender: TObject);
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procedure DivBtnClick(Sender: TObject);
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procedure PlusMinusBtnClick(Sender: TObject);
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procedure FormKeyPress(Sender: TObject; var Key: Char);
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procedure EqualBtnClick(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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procedure FormDestroy(Sender: TObject);
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procedure ComboBox1Change(Sender: TObject);
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procedure ConvertBtnClick(Sender: TObject);
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procedure ComboBox2Change(Sender: TObject);
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procedure Button1Click(Sender: TObject);
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procedure Memo1KeyDown(Sender: TObject; var Key: Word;
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Shift: TShiftState);
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private
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procedure UpdateConversionCombo;
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procedure UpdateCurrencyCombo;
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procedure UpdateFormCaption;
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procedure ShowExchangeData(const src, trg: string);
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procedure ShowCurrencyData(const Name : string);
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procedure DoRateUpdate(Sender: TObject; NewRate: TStDecimal;
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var NewDate: TDateTime);
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{ Private declarations }
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public
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MoneyChar : MoneyCharSet;
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MoneyOper : MoneyOperSet;
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PendOp : Char;
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DFHold : Integer;
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XBuffer : string[20];
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ClearOnNext, Converting : Boolean;
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BaseCurrency : string;
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Currencies : TStCurrencyList;
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Conversions : TStExchangeRateList;
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procedure SendKeyPress(Sender : TObject; C : Char);
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{ Public declarations }
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end;
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var
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MoneyCalcDlg: TMoneyCalcDlg;
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implementation
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{$R *.DFM}
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procedure TMoneyCalcDlg.UpdateFormCaption;
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begin
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if BaseCurrency <> '' then
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Caption := BaseFormCaption + '-' + BaseCurrency
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else
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Caption := BaseFormCaption;
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end;
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procedure TMoneyCalcDlg.FormCreate(Sender: TObject);
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begin
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MoneyChar := ['0'..'9', SysUtils.DecimalSeparator, '~'];
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MoneyOper := ['+', '-', '/', '*'];
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Edit1.Text := '0.';
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Memo1.Lines[0] := '0.';
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PendOp := #0;
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DFHold := 0;
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XBuffer := '0';
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ClearOnNext := False;
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Currencies := TStCurrencyList.Create;
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Currencies.LoadFromFile('..\..\STCCY.DAT');
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UpdateCurrencyCombo;
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ComboBox1.Text := DefaultCurrency;
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ComboBox1.ItemIndex := ComboBox1.Items.IndexOf(ComboBox1.Text);
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BaseCurrency := ComboBox1.Text;
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ShowCurrencyData(ComboBox1.Text);
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Conversions := TStExchangeRateList.Create;
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Conversions.LoadFromFile('..\..\STCCYCNV.DAT');
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UpdateConversionCombo;
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UpdateFormCaption;
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// Edit1.Text := '0.00';
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end;
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procedure TMoneyCalcDlg.FormDestroy(Sender: TObject);
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begin
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Conversions.Free;
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end;
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procedure TMoneyCalcDlg.SendKeyPress(Sender : TObject; C : Char);
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var
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KP : Char;
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begin
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KP := C;
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FormKeyPress(Sender,KP);
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end;
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procedure TMoneyCalcDlg.NumBtnClick(Sender: TObject);
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var
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C : Char;
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begin
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C := IntToStr((Sender as TButton).Tag)[1];
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SendKeyPress(Sender, C);
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end;
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procedure TMoneyCalcDlg.DecKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender, SysUtils.DecimalSeparator);
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end;
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procedure TMoneyCalcDlg.ClearBtnClick(Sender: TObject);
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begin
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XBuffer := '0.';
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// Edit1.Text := '0.';
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Memo1.Lines[0] := '0.';
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PendOp := #0;
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ClearOnNext := True;
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end;
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procedure TMoneyCalcDlg.ClearEntryBtnClick(Sender: TObject);
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begin
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// Edit1.Text := '0.';
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Memo1.Lines[0] := '0.';
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ClearOnNext := True;
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end;
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procedure TMoneyCalcDlg.AddBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'+');
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end;
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procedure TMoneyCalcDlg.SubBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'-');
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end;
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procedure TMoneyCalcDlg.MulBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'*');
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end;
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procedure TMoneyCalcDlg.DivBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'/');
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end;
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procedure TMoneyCalcDlg.PlusMinusBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'~');
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end;
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procedure TMoneyCalcDlg.FormKeyPress(Sender: TObject; var Key: Char);
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var
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HldOp : Char;
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L : Integer;
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Money1 : TStMoney;
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S : string[21];
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F : Double;
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begin
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Money1 := TStMoney.Create;
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try
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if Key = #13 then begin
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if XBuffer = '0' then begin
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// XBuffer := Edit1.Text;
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XBuffer := Memo1.Lines[0];
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end
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else begin
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EqualBtnClick(Sender);
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XBuffer := '0';
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end;
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Key := #0;
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ClearOnNext := True;
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end;
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if Key in MoneyChar then begin
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if (Key = '~') then begin
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// S := Edit1.Text;
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S := Memo1.Lines[0];
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if (S[1] <> '-') then
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Insert('-',S,1)
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else
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Delete(S,1,1);
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// Edit1.Text := S;
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Memo1.Lines[0] := S;
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Money1.Amount.AssignFromFloat(StrToFloat(S));
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Key := #0;
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end else begin
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if ClearOnNext then begin
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// Edit1.Text := '';
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Memo1.Lines[0] := '';
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ClearOnNext := False;
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end;
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end;
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end;
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if Key in MoneyOper then begin
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if not (Key in ['s', 'e', 'l']) then begin
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// if Edit1.Text = '' then
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// Edit1.Text := '0';
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if Memo1.Lines[0] = '' then
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Memo1.Lines[0] := '0';
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if (XBuffer <> '0') then
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EqualBtnClick(Sender);
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XBuffer := Edit1.Text;
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XBuffer := Memo1.Lines[0];
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F := StrToFloat(XBuffer);
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Money1.Amount.AssignFromFloat(F);
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PendOp := Key;
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Key := #0;
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ClearOnNext := True;
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end else begin
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HldOp := PendOp;
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PendOp := Key;
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EqualBtnClick(Sender);
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PendOp := HldOp;
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Key := #0;
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end;
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end;
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if (Key in MoneyChar) then begin
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// S := Edit1.Text;
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S := Memo1.Lines[0];
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L := Length(S);
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if (L < Edit1.MaxLength) then begin
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Edit1.Text := S + Key;
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end;
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if (L < Memo1.MaxLength) then begin
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Memo1.Lines[0] := S + Key;
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end;
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Key := #0
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end;
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// Edit1.SetFocus;
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// Edit1.SelStart := Length(Edit1.Text);
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// Edit1.SelLength := 0;
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Memo1.SetFocus;
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Memo1.SelStart := Length(Edit1.Text);
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Memo1.SelLength := 0;
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finally
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Money1.Free;
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end;
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end;
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procedure TMoneyCalcDlg.EqualBtnClick(Sender: TObject);
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var
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S : AnsiString;
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RV, Money : TStMoney;
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begin
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RV := TStMoney.Create;
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Money := TStMoney.Create;
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try
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if PendOp <> #0 then begin
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// S := Edit1.Text;
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S := Memo1.Lines[0];
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if S = '' then begin
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MessageBeep(0);
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Exit;
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end;
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RV.Amount.AssignFromFloat(StrToFloat(XBuffer));
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Money.Amount.AssignFromFloat(StrToFloat(S));
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case PendOp of
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'+' : begin
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RV.Add(Money, RV);
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// Edit1.Text := RV.AsString;
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Memo1.Lines[0] := RV.AsString;
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end;
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'-' : begin
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RV.Subtract(Money, RV);
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// Edit1.Text := RV.AsString;
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Memo1.Lines[0] := RV.AsString;
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end;
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'*' : begin
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RV.Multiply(StrToFloat(S), RV);
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// Edit1.Text := RV.AsString;
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Memo1.Lines[0] := RV.AsString;
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end;
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'/' : begin
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if Money.IsZero then begin
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// Edit1.Text := 'Divide by zero error';
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Memo1.Lines[0] := 'Divide by zero error';
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PendOp := #0;
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ClearOnNext := False;
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end else begin
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RV.Divide(StrToFloat(S), RV);
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// Edit1.Text := RV.AsString;
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Memo1.Lines[0] := RV.AsString;
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end;
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end;
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end; { case }
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end;
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PendOp := #0;
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ClearOnNext := True;
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// Edit1.SetFocus;
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// Edit1.SelStart := 0;
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// Edit1.SelLength := 0;
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Memo1.SetFocus;
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Memo1.SelStart := 0;
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Memo1.SelLength := 0;
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finally
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Money.Free;
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RV.Free;
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end;
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end;
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procedure TMoneyCalcDlg.UpdateCurrencyCombo;
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var
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i : Integer;
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begin
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ComboBox1.Items.Clear;
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for i := 0 to Pred(Currencies.Count) do
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ComboBox1.Items.Add(Currencies.Items[i].ISOName);
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ComboBox1.Text := '';
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end;
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procedure TMoneyCalcDlg.UpdateConversionCombo;
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var
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i : Integer;
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begin
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ComboBox2.Items.Clear;
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for i := 0 to Pred(Conversions.Count) do
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if Conversions.Items[i].Source = BaseCurrency then
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ComboBox2.Items.Add(Conversions.Items[i].Target);
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ComboBox2.Text := '';
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ListBox2.Clear;
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end;
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procedure TMoneyCalcDlg.ShowCurrencyData(const Name : string);
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var
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Cur : TStCurrency;
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begin
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Cur := Currencies.Currencies[Name];
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ListBox1.Items.Clear;
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ListBox1.Items.Add('Name:' + #9 + Cur.CurrencyName);
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ListBox1.Items.Add('ISOName:' + #9 + Cur.ISOName);
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ListBox1.Items.Add('ISOCode:' + #9 + Cur.ISOCode);
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ListBox1.Items.Add('Major:' + #9 + Cur.UnitMajor);
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ListBox1.Items.Add('Minor:' + #9 + Cur.UnitMinor);
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if ComboBox2.Text <> '' then
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ShowExchangeData(Name, ComboBox2.Text);
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end;
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procedure TMoneyCalcDlg.ComboBox1Change(Sender: TObject);
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begin
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BaseCurrency := ComboBox1.Text;
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UpdateConversionCombo;
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UpdateFormCaption;
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ShowCurrencyData(BaseCurrency);
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end;
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procedure TMoneyCalcDlg.ConvertBtnClick(Sender: TObject);
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var
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CV : TStMoney;
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begin
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CV := TStMoney.Create;
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try
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CV.ExchangeRates := Conversions;
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CV.Amount.AssignFromFloat(StrToFloat(Edit1.Text));
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CV.Amount.AssignFromFloat(StrToFloat(Memo1.Lines[0]));
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CV.Currency := ComboBox1.Text;
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CV.Convert(ComboBox2.Text, CV);
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// Edit1.Text := CV.AsString;
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Memo1.Lines[0] := CV.AsString;
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finally
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CV.Free;
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end;
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end;
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procedure TMoneyCalcDlg.ShowExchangeData(const src, trg : string);
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var
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Cur : TStCurrency;
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Rate : TStExchangeRate;
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begin
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Cur := Currencies.Currencies[trg];
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Rate := Conversions.Rates[src, trg];
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ListBox2.Items.Clear;
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case Rate.ExchangeType of
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ctTriangular: begin
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ListBox2.Items.Add('Name:' + #9 + Cur.CurrencyName);
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ListBox2.Items.Add(src + '->' + trg + ' inter.:' + #9 + Rate.Intermediate);
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end;
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ctMultiply, ctDivide: begin
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ListBox2.Items.Add('Name: ' + #9 + Cur.CurrencyName);
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ListBox2.Items.Add(src + '->' + trg + ' rate:' + #9 + Rate.ConversionRate.AsString);
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end;
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end;
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end;
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procedure TMoneyCalcDlg.ComboBox2Change(Sender: TObject);
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begin
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ShowExchangeData(ComboBox1.Text, ComboBox2.Text);
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end;
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| 494 |
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procedure GetRateAndDate(var Rate, Date: string);
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begin
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| 497 |
|
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end;
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|
| 500 |
procedure TMoneyCalcDlg.DoRateUpdate(Sender: TObject;
|
| 501 |
NewRate : TStDecimal; var NewDate : TDateTime);
|
| 502 |
var
|
| 503 |
ARate, ADate : string;
|
| 504 |
begin
|
| 505 |
GetRateAndDate(ARate, ADate);
|
| 506 |
NewRate.AsString := ARate;
|
| 507 |
NewDate := StrToDateTime(ADate);
|
| 508 |
end;
|
| 509 |
|
| 510 |
|
| 511 |
|
| 512 |
procedure TMoneyCalcDlg.Button1Click(Sender: TObject);
|
| 513 |
var
|
| 514 |
CurrencyList : TStCurrencyList;
|
| 515 |
Conversions : TStExchangeRateList;
|
| 516 |
ARate : TStExchangeRate;
|
| 517 |
i : Integer;
|
| 518 |
begin
|
| 519 |
|
| 520 |
|
| 521 |
for i := 0 to Pred(Conversions.Count) do begin
|
| 522 |
ARate := Conversions.Items[i];
|
| 523 |
ARate.Update;
|
| 524 |
end;
|
| 525 |
|
| 526 |
|
| 527 |
if CurrencyList.ContainsID('USD') then begin
|
| 528 |
ListBox1.Items.Add('Name=' + CurrencyList.Currencies['USD'].CurrencyName);
|
| 529 |
ListBox1.Items.Add('ISOCode=' + CurrencyList.Currencies['USD'].ISOCode);
|
| 530 |
end;
|
| 531 |
|
| 532 |
end;
|
| 533 |
|
| 534 |
procedure TMoneyCalcDlg.Memo1KeyDown(Sender: TObject; var Key: Word;
|
| 535 |
Shift: TShiftState);
|
| 536 |
begin
|
| 537 |
if Key = VK_DOWN then
|
| 538 |
Key := 0;
|
| 539 |
end;
|
| 540 |
|
| 541 |
end.
|
| 542 |
|
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