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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 Ex1DArrU;
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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, Buttons, ExtCtrls,
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StConst, StUtils, StBase, StLArr;
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type
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ARecord = record
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X, Y : LongInt;
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Mag : Double;
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Name1 : string[10];
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Name2 : string[10];
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end;
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type
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TSTDlg = class(TForm)
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CreateBtn: TButton;
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ElemNum: TEdit;
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ClearBtn: TButton;
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FillBtn: TButton;
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PutBtn: TButton;
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GetBtn: TButton;
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SortBtn: TButton;
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LB1: TListBox;
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Label4: TLabel;
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Label1: TLabel;
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Label2: TLabel;
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Label3: TLabel;
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Label5: TLabel;
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Label6: TLabel;
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Edit1: TEdit;
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Edit2: TEdit;
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Edit3: TEdit;
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Edit4: TEdit;
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Edit5: TEdit;
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LoadBtn: TButton;
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SaveBtn: TButton;
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OD1: TOpenDialog;
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SD1: TSaveDialog;
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procedure FormClose(Sender: TObject; var Action: TCloseAction);
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procedure CreateBtnClick(Sender: TObject);
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procedure ClearBtnClick(Sender: TObject);
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procedure FillBtnClick(Sender: TObject);
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procedure PutBtnClick(Sender: TObject);
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procedure GetBtnClick(Sender: TObject);
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procedure SortBtnClick(Sender: TObject);
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procedure LB1DblClick(Sender: TObject);
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procedure LoadBtnClick(Sender: TObject);
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procedure SaveBtnClick(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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private
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{ Private declarations }
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public
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{ Public declarations }
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MyLArray : TStLArray;
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ARec : ARecord;
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procedure SetBusy(B : Boolean);
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procedure FillControls;
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procedure FillListBox;
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function CheckControls(var AR : ARecord) : Boolean;
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procedure UpdateButtons(AOK : Boolean);
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end;
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var
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STDlg: TSTDlg;
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implementation
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{$R *.DFM}
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procedure TSTDlg.FormCreate(Sender: TObject);
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begin
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RegisterClass(TStLArray);
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UpdateButtons(False);
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end;
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procedure TSTDlg.FormClose(Sender: TObject;
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var Action: TCloseAction);
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begin
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MyLArray.Free;
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end;
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procedure TSTDlg.SetBusy(B : Boolean);
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begin
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if B then
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Screen.Cursor := crHourGlass
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else
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Screen.Cursor := crDefault;
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end;
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function MyArraySort(const El1, El2) : Integer; far;
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var
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R1, R2 : ARecord;
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begin
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R1 := ARecord(El1);
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R2 := ARecord(El2);
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Result := (R1.X-R2.X);
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if Result = 0 then
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Result := (R1.Y-R2.Y);
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if Result = 0 then
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Result := Trunc(R1.Mag-R2.Mag);
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if Result = 0 then
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Result := CompareText(R1.Name1,R2.Name1);
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if Result = 0 then
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Result := CompareText(R1.Name2,R2.Name2);
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end;
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procedure TSTDlg.FillControls;
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begin
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with ARec do
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begin
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Edit1.Text := Name1;
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Edit2.Text := Name2;
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Edit3.Text := IntToStr(X);
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Edit4.Text := IntToStr(Y);
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Edit5.Text := FloatToStr(Mag);
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end;
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end;
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procedure TSTDlg.FillListBox;
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var
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step : integer;
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begin
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SetBusy(True);
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LB1.Clear;
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LB1.Perform(WM_SETREDRAW,0,0);
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for step := 0 to MyLArray.Count-1 do
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begin
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MyLArray.Get(step,ARec);
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LB1.Items.Add(IntToStr(ARec.X) + ', ' + IntToStr(ARec.Y));
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end;
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LB1.Perform(WM_SETREDRAW,1,0);
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LB1.Update;
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MyLArray.Get(0,ARec);
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SetBusy(False);
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end;
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function TSTDlg.CheckControls(var AR : ARecord) : Boolean;
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var
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C,
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IV : Integer;
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IR : Single;
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begin
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Result := False;
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if (Edit1.Text = '') OR
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(Edit2.Text = '') OR
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(Edit3.Text = '') OR
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(Edit4.Text = '') OR
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(Edit5.Text = '') then
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Exit;
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AR.Name1 := Edit1.Text;
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AR.Name2 := Edit2.Text;
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Val(Edit3.Text,IV,C);
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if (C<>0) then
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Exit
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else
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AR.X := IV;
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Val(Edit4.Text,IV,C);
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if (C<>0) then
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Exit
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else
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AR.Y := IV;
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Val(Edit5.Text,IR,C);
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if (C<>0) then
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Exit
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else
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AR.Mag := IR;
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Result := True;
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end;
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procedure TSTDlg.UpdateButtons(AOK : Boolean);
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begin
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ClearBtn.Enabled := AOK;
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FillBtn.Enabled := AOK;
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GetBtn.Enabled := AOK;
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PutBtn.Enabled := AOK;
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SortBtn.Enabled := AOK;
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SaveBtn.Enabled := AOK;
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end;
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procedure TSTDlg.CreateBtnClick(Sender: TObject);
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var
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step,
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I, J,
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Value : LongInt;
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begin
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LB1.Clear;
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SetBusy(True);
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if Assigned(MyLArray) then
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MyLArray.Free;
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UpdateButtons(False);
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MyLArray := TStLArray.Create(5000, sizeof(ARec));
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MyLArray.ElementsStorable := True;
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MyLArray.Clear;
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Randomize;
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LB1.Perform(WM_SETREDRAW,0,0);
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Value := MyLArray.Count;
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for step := 0 to Value-1 do
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begin
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with ARec do begin
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Name1 := '';
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Name2 := '';
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for I := 1 to 10 do begin
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J := Random(26) + Ord('A');
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Name1 := Name1+ Chr(J);
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J := Random(26) + Ord('A');
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Name2 := Name2 + Chr(J);
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end;
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X := Trunc(Random(1000));
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Y := Trunc(Random(1000));
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Mag := Sqrt(Random(25000));
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MyLArray.Put(step,ARec);
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LB1.Items.Add(IntToStr(ARec.X) + ', ' + IntToStr(ARec.Y));
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end;
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end;
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LB1.Perform(WM_SETREDRAW,1,0);
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LB1.Update;
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ElemNum.Text := '0';
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MyLArray.Get(0,ARec);
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FillControls;
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UpdateButtons(True);
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SetBusy(False);
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end;
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procedure TSTDlg.ClearBtnClick(Sender: TObject);
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begin
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MyLArray.Clear;
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LB1.Clear;
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ElemNum.Text := '0';
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MyLArray.Get(0,ARec);
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FillControls;
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end;
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procedure TSTDlg.FillBtnClick(Sender: TObject);
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begin
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if NOT CheckControls(ARec) then
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begin
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ShowMessage('One or more invalid entries');
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Exit;
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end;
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MyLArray.Fill(ARec);
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FillListBox;
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ElemNum.Text := '0';
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MyLArray.Get(0,ARec);
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FillControls;
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end;
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procedure TSTDlg.PutBtnClick(Sender: TObject);
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var
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E : LongInt;
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begin
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if (ElemNum.Text = '') then
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ElemNum.Text := '0';
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if NOT CheckControls(ARec) then
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begin
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ShowMessage('One or more invalid entries');
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Exit;
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end;
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E := StrToInt(ElemNum.Text);
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MyLArray.Put(E,ARec);
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LB1.Items[E] := IntToStr(ARec.X) + ', ' + IntToStr(ARec.Y);
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MyLArray.Get(E,ARec);
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FillControls;
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end;
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procedure TSTDlg.GetBtnClick(Sender: TObject);
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var
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E : LongInt;
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begin
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if (ElemNum.Text = '') then
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ElemNum.Text := '0';
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E := StrToInt(ElemNum.Text);
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MyLArray.Get(E,ARec);
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FillControls;
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end;
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procedure TSTDlg.SortBtnClick(Sender: TObject);
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begin
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SetBusy(True);
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MyLArray.Sort(MyArraySort);
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SetBusy(False);
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FillListBox;
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FillControls;
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SetBusy(False);
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end;
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procedure TSTDlg.LB1DblClick(Sender: TObject);
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begin
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MyLArray.Get(LB1.ItemIndex,ARec);
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ElemNum.Text := IntToStr(LB1.ItemIndex);
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FillControls;
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end;
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procedure TSTDlg.LoadBtnClick(Sender: TObject);
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begin
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if (OD1.Execute) then
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begin
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if (NOT Assigned(MyLArray)) then
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begin
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UpdateButtons(False);
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MyLArray := TStLArray.Create(5000, sizeof(ARec));
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MyLArray.ElementsStorable := True;
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end;
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MyLArray.Clear;
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MyLArray.LoadFromFile(OD1.FileName);
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FillListBox;
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FillControls;
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UpdateButtons(True);
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end;
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end;
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procedure TSTDlg.SaveBtnClick(Sender: TObject);
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begin
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if (SD1.Execute) then
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MyLArray.StoreToFile(SD1.FileName);
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end;
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end.
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