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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@7886 8e941d3f-bd1b-0410-a28a-d453659cc2b4
76 lines
1.4 KiB
ObjectPascal
76 lines
1.4 KiB
ObjectPascal
unit SpBrUnit;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
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StdCtrls, contexthelpunit;
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type
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{ TSpBrFrm }
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TSpBrFrm = class(TForm)
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HelpBtn: TButton;
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ResetBtn: TButton;
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CancelBtn: TButton;
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ComputeBtn: TButton;
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ReturnBtn: TButton;
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OldRelEdit: TEdit;
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MultKEdit: TEdit;
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NewRelEdit: TEdit;
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Label1: TLabel;
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Label2: TLabel;
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Label3: TLabel;
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procedure ComputeBtnClick(Sender: TObject);
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procedure FormShow(Sender: TObject);
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procedure HelpBtnClick(Sender: TObject);
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procedure ResetBtnClick(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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end;
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var
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SpBrFrm: TSpBrFrm;
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implementation
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{ TSpBrFrm }
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procedure TSpBrFrm.ResetBtnClick(Sender: TObject);
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begin
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OldRelEdit.Text := '';
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NewRelEdit.Text := '';
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MultKEdit.Text := '';
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end;
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procedure TSpBrFrm.FormShow(Sender: TObject);
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begin
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ResetBtnClick(self);
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end;
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procedure TSpBrFrm.HelpBtnClick(Sender: TObject);
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begin
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ContextHelpForm.HelpMessage((Sender as TButton).tag);
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end;
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procedure TSpBrFrm.ComputeBtnClick(Sender: TObject);
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var
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oldrel, newrel, Factor : double;
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begin
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oldrel := StrToFloat(OldRelEdit.Text);
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Factor := StrToFloat(MultKEdit.Text);
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newrel := (Factor * oldrel) / (1.0 + (Factor - 1.0) * oldrel);
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NewRelEdit.Text := FloatToStr(newrel);
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end;
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initialization
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{$I spbrunit.lrs}
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end.
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