Add numberediting example
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Timothy Warren
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c031017ad9
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<?xml version="1.0" encoding="UTF-8"?>
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<CONFIG>
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<ProjectOptions>
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<Version Value="11"/>
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<General>
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<SessionStorage Value="InProjectDir"/>
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<MainUnit Value="0"/>
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<Title Value="numberediting"/>
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<Scaled Value="True"/>
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<ResourceType Value="res"/>
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<UseXPManifest Value="True"/>
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<XPManifest>
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<DpiAware Value="True"/>
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</XPManifest>
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<Icon Value="0"/>
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</General>
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<BuildModes Count="1">
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<Item1 Name="Default" Default="True"/>
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</BuildModes>
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<PublishOptions>
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<Version Value="2"/>
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<UseFileFilters Value="True"/>
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</PublishOptions>
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<RunParams>
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<FormatVersion Value="2"/>
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<Modes Count="0"/>
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</RunParams>
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<RequiredPackages Count="2">
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<Item1>
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<PackageName Value="LazControls"/>
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</Item1>
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<Item2>
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<PackageName Value="LCL"/>
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</Item2>
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</RequiredPackages>
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<Units Count="2">
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<Unit0>
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<Filename Value="numberediting.lpr"/>
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<IsPartOfProject Value="True"/>
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</Unit0>
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<Unit1>
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<Filename Value="numeditmain.pas"/>
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<IsPartOfProject Value="True"/>
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<ComponentName Value="Form1"/>
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<ResourceBaseClass Value="Form"/>
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</Unit1>
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</Units>
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</ProjectOptions>
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<CompilerOptions>
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<Version Value="11"/>
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<Target>
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<Filename Value="numberediting"/>
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</Target>
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<SearchPaths>
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<IncludeFiles Value="$(ProjOutDir)"/>
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<UnitOutputDirectory Value="lib/$(TargetCPU)-$(TargetOS)"/>
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</SearchPaths>
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<Linking>
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<Debugging>
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<DebugInfoType Value="dsDwarf2"/>
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</Debugging>
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<Options>
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<Win32>
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<GraphicApplication Value="True"/>
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</Win32>
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</Options>
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</Linking>
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</CompilerOptions>
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<Debugging>
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<Exceptions Count="3">
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<Item1>
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<Name Value="EAbort"/>
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</Item1>
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<Item2>
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<Name Value="ECodetoolError"/>
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</Item2>
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<Item3>
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<Name Value="EFOpenError"/>
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</Item3>
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</Exceptions>
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</Debugging>
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</CONFIG>
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program numberediting;
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{$mode objfpc}{$H+}
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uses
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{$IFDEF UNIX}{$IFDEF UseCThreads}
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cthreads,
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{$ENDIF}{$ENDIF}
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Interfaces, // this includes the LCL widgetset
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Forms, lazcontrols, numeditmain
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{ you can add units after this };
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{$R *.res}
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begin
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RequireDerivedFormResource:=True;
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Application.Scaled:=True;
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Application.Initialize;
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Application.CreateForm(TForm1, Form1);
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Application.Run;
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end.
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object Form1: TForm1
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Left = 800
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Height = 240
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Top = 281
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Width = 320
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Caption = 'SpinEdit example'
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ClientHeight = 240
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ClientWidth = 320
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OnActivate = FormActivate
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LCLVersion = '2.0.12.0'
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object lblA: TLabel
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Left = 56
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Height = 16
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Top = 17
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Width = 55
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Caption = 'integer A'
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ParentColor = False
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end
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object lblB: TLabel
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Left = 200
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Height = 16
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Top = 17
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Width = 55
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Caption = 'integer B'
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ParentColor = False
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end
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object seA: TSpinEdit
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Left = 23
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Height = 21
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Top = 40
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Width = 129
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MaxValue = 10000
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MinValue = -10000
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OnChange = ChangeAorB
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TabOrder = 0
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Value = 10
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end
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object seB: TSpinEdit
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Left = 160
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Height = 21
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Top = 40
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Width = 136
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MaxValue = 10000
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MinValue = -10000
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OnChange = ChangeAorB
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TabOrder = 1
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Value = 10
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end
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object DividerBevel1: TDividerBevel
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Left = 23
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Height = 16
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Top = 80
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Width = 273
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Caption = 'calculated results'
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Font.Style = [fsBold]
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ParentFont = False
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end
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object lbResults: TListBox
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Left = 23
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Height = 120
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Top = 104
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Width = 273
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ItemHeight = 0
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TabOrder = 2
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end
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end
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unit numeditmain;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls, Spin,
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DividerBevel, math;
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type
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{ TForm1 }
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TForm1 = class(TForm)
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DividerBevel1: TDividerBevel;
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lblB: TLabel;
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lblA: TLabel;
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lbResults: TListBox;
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seA: TSpinEdit;
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seB: TSpinEdit;
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procedure ChangeAorB(Sender: TObject);
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procedure FormActivate(Sender: TObject);
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private
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procedure UpdateCalculations;
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function CalcSum: int64;
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function CalcProduct: int64;
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function CalcPower: double;
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function CalcIntDivision(var isValid: boolean): int64;
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function CalcModulus(var isValid: boolean): int64;
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function CalcSumOfSquares: int64;
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public
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end;
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var
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Form1: TForm1;
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implementation
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{$R *.lfm}
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{ TForm1 }
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procedure TForm1.ChangeAorB(Sender: TObject);
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begin
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UpdateCalculations;
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end;
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procedure TForm1.FormActivate(Sender: TObject);
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begin
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ChangeAOrB(nil);
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end;
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procedure TForm1.UpdateCalculations;
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var OK: boolean;
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n: Int64;
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begin
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OK := true;
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lbResults.Items.Clear;
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lbResults.Items.Add('A + B : ' + IntToStr(CalcSum));
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n := CalcIntDivision(OK);
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if OK then
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begin
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lbResults.Items.Add('A DIV B : ' + IntToStr(n));
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lbResults.Items.Add('A MOD B : ' + IntToStr(CalcModulus(OK)));
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end
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else lbResults.Items.Add('A DIV B, A MOD B are not calculable');
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lbResults.Items.Add('A x B : ' + IntToStr(CalcProduct));
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lbResults.Items.Add('A*A + B*B : ' + IntToStr(CalcSumOfSquares));
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lbResults.Items.Add('A to POWER B : ' + FloatToStr(CalcPower));
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end;
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function TForm1.CalcSum: int64;
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begin
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Result := seA.Value + seB.Value;
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end;
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function TForm1.CalcProduct: int64;
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begin
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Result := seA.Value * seB.Value;
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end;
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function TForm1.CalcPower: double;
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begin
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Result := intpower(seA.Value, seB.Value);
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end;
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function TForm1.CalcIntDivision(var isValid: boolean): int64;
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begin
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Result := 0;
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isValid := (seB.Value <> 0);
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if isValid
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then Result := seA.Value div seB.Value;
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end;
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function TForm1.CalcModulus(var isValid: boolean): int64;
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begin
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Result := 0;
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isValid := (seB.Value <> 0);
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if isValid
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then Result := seA.Value mod seB.Value;
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end;
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function TForm1.CalcSumOfSquares: int64;
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begin
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Result := seA.Value * seA.Value + seB.Value * seB.Value;
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end;
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end.
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