Calculadora Simples
unit uMenu;
{
Autor: Paulo Henrique Tadeu Alves de Olivera
E-Mail : paulo@liveteenslinux.com
dr_insanebr@hotmail.com
}
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, XPMan, ActnList, Menus;
type
TFMenu = class(TForm)
MainMenu1: TMainMenu;
ActionList1: TActionList;
Editar1: TMenuItem;
btn0: TAction;
btn1: TAction;
btn2: TAction;
btn3: TAction;
btn4: TAction;
btn5: TAction;
btn6: TAction;
btn7: TAction;
btn8: TAction;
btn9: TAction;
XPManifest1: TXPManifest;
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
Button5: TButton;
Button6: TButton;
Button7: TButton;
Button8: TButton;
Button9: TButton;
Button10: TButton;
Button11: TButton;
Button12: TButton;
Button13: TButton;
Button14: TButton;
Button15: TButton;
Button16: TButton;
Button17: TButton;
Button18: TButton;
Button19: TButton;
btnAdic: TAction;
btnSubt: TAction;
btnMult: TAction;
btnDivi: TAction;
btnABS: TAction;
btnIgual: TAction;
btnC: TAction;
edtResult: TEdit;
btnVing: TAction;
Button23: TButton;
btnCE: TAction;
procedure FormKeyPress(Sender: TObject; var Key: Char);
procedure FormCreate(Sender: TObject);
procedure btn0Execute(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
//Procedure Responsavel pelo funcionamento da calculadora
procedure Click(obj :TObject);
end;
var
FMenu: TFMenu;
ValorDif: Extended;
//Teclas
Adic, Subt, Mult, Divi, Igual, Virg: Boolean;
implementation
{$R *.dfm}
{ TFMenu }
procedure TFMenu.btn0Execute(Sender: TObject);
begin
{
----------========= Executa Ações ========-----------------
Esse ação deve ser adionanda em todos os botoes
}
Click(Sender);
end;
procedure TFMenu.Click(obj: TObject);
var
ConverNumero: String;
begin
//Retira os zeros na frente dos numero
ConverNumero:= FloatToStr(StrToFloat(edtResult.Text));
//Incrementa numeros no edit
if (TAction(obj).Caption = '0') or (TAction(obj).Caption = '1') or
(TAction(obj).Caption = '2') or (TAction(obj).Caption = '3') or
(TAction(obj).Caption = '4') or (TAction(obj).Caption = '5') or
(TAction(obj).Caption = '6') or (TAction(obj).Caption = '7') or
(TAction(obj).Caption = '8') or (TAction(obj).Caption = '9')
then
begin
//Checa se pode adicionar virgula
if Virg then
begin
//checa se ja tem virgula se nao tem ele adiciona
if pos(',',ConverNumero) = 0 then
begin
ConverNumero:= ConverNumero + ',';//Adiciona virgula
Virg:= False;
end;
end;
ConverNumero := ConverNumero + TAction(obj).Caption;
edtResult.Text:= FloatToStr(StrToFloat(ConverNumero));
end
//Ativa ação de Adição de virgula
else if (TAction(obj).Caption = ',') then
begin
Virg := True; Divi:= False; Mult:= False; Adic:= False; Subt:= False;
end
//Ativa ação de Divisao
else if (TAction(obj).Caption = '/') then
begin
Divi := True; Virg:= False; Mult:= False; Adic:= False; Subt:= False;
ValorDif := StrToFloat(edtResult.Text);
edtResult.Text:= '0';
end
//Ativa ação de Multiplicação
else if (TAction(obj).Caption = '*') then
begin
Mult := True; Virg:= False; Divi:= False; Adic:= False; Subt:= False;
ValorDif := StrToFloat(edtResult.Text);
edtResult.Text:= '0';
end
//Ativa ação de Soma
else if (TAction(obj).Caption = '+') then
begin
Adic := True; Virg:= False; Divi:= False; Mult:= False; Subt:= False;
ValorDif := StrToFloat(edtResult.Text);
edtResult.Text:= '0';
end
//Ativa ação de Subtrair
else if (TAction(obj).Caption = '-') then
begin
Subt := True; Virg:= False; Divi:= False; Mult:= False; Adic:= False;
ValorDif := StrToFloat(edtResult.Text);
edtResult.Text:= '0';
end
//Faz o Resultado
else if (TAction(obj).Caption = '=') then
begin
if (Adic = True) or (Subt = True) or (Mult = True) or
(Divi = True) or (Igual = True) then
begin
{executa os calculos}
if adic then //Executa soma
edtResult.Text := FloatToStr(ValorDif + StrToFloat(edtResult.text));
if Subt then //Executa Subtração
edtResult.Text := FloatToStr(ValorDif - StrToFloat(edtResult.text));
if Divi then //Executa Divisão
edtResult.Text := FloatToStr(ValorDif / StrToFloat(edtResult.text));
if Mult then //Executa Multiplicação
edtResult.Text := FloatToStr(ValorDif * StrToFloat(edtResult.text));
end;
end
//Zera o Edit
else if (TAction(obj).Caption = 'C') then
begin
edtResult.Text:= '0';
end
//Reseta tudo
else if (TAction(obj).Caption = 'CE') then
begin
edtResult.Text:= '0';
ValorDif := 0;
Adic := False; Virg:= False; Divi:= False; Mult:= False; Subt:= False;
end
//Troca Sinais do Valores
else if (TAction(obj).Caption = '+/-') then
begin
if StrToFloat(edtResult.text) > 0 then
edtResult.Text:= FloatToStr(((0-1)*(abs(StrToFloat(edtResult.text)))))
else if StrToFloat(edtResult.text) < 0 then
edtResult.Text:= FloatToStr(((0+1)*(abs(StrToFloat(edtResult.text)))));
end;
end;
procedure TFMenu.FormCreate(Sender: TObject);
begin
//Reseta as variaveis
Adic := False; Virg:= False; Divi:= False; Mult:= False; Subt:= False;
ValorDif:= 0;
end;
procedure TFMenu.FormKeyPress(Sender: TObject; var Key: Char);
begin
//Executa click manuais sem necessidade usar o mouse
if key = '0' then btn0.Execute; if key = '1' then btn1.Execute;
if key = '2' then btn2.Execute; if key = '3' then btn3.Execute;
if key = '4' then btn4.Execute; if key = '5' then btn5.Execute;
if key = '6' then btn6.Execute; if key = '7' then btn7.Execute;
if key = '8' then btn8.Execute; if key = '9' then btn9.Execute;
if key = ',' then btnVing.Execute; if key = '+' then btnAdic.Execute;
if key = '-' then btnSubt.Execute; if key = '*' then btnMult.Execute;
if key = '/' then btnDivi.Execute; if key = 'c' then btnC.Execute;
if key in ['=',#13] then btnIgual.Execute;
end;
end.
