일단 프로젝트 하나 생성.
어느걸로 해야 하나 고민되지만, 쉽게 "Xamarin.Forms" 에 "공유 프로젝트" 로 선택.
<?xml version="1.0" encoding="utf-8" ?> <ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:local="clr-namespace:SonCalc" x:Class="SonCalc.MainPage" Title="SonCal"> <Grid Padding="0" RowSpacing="0" ColumnSpacing="0" BackgroundColor="Black"> <Grid.RowDefinitions> <RowDefinition Height="*"/> <RowDefinition Height="*"/> <RowDefinition Height="*"/> <RowDefinition Height="*"/> <RowDefinition Height="*"/> <RowDefinition Height="*"/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition Width="*"/> <ColumnDefinition Width="*"/> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <Label FontSize="40" x:Name="lblPrintNumber" BackgroundColor="Black" Text="0" TextColor="White" HorizontalTextAlignment="End" VerticalTextAlignment="Center" Grid.ColumnSpan="4"/> <Button Text="AC" Grid.Row="1" Grid.Column="0" BackgroundColor="Silver" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="/" Grid.Row="1" Grid.Column="1" BackgroundColor="Silver" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="*" Grid.Row="1" Grid.Column="2" BackgroundColor="Silver" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="-" Grid.Row="1" Grid.Column="3" BackgroundColor="Orange" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="7" Grid.Row="2" Grid.Column="0" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="8" Grid.Row="2" Grid.Column="1" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="9" Grid.Row="2" Grid.Column="2" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="+" Grid.Row="2" Grid.Column="3" Grid.RowSpan="2" BackgroundColor="Orange" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="4" Grid.Row="3" Grid.Column="0" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="5" Grid.Row="3" Grid.Column="1" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="6" Grid.Row="3" Grid.Column="2" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="1" Grid.Row="4" Grid.Column="0" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="2" Grid.Row="4" Grid.Column="1" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="3" Grid.Row="4" Grid.Column="2" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="=" Grid.Row="4" Grid.Column="3" Grid.RowSpan="2" BackgroundColor="Orange" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="0" Grid.Row="5" Grid.Column="0" Grid.ColumnSpan="2" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> <Button Text="." Grid.Row="5" Grid.Column="2" BackgroundColor="White" TextColor="Black" FontSize="40" BorderRadius="0" Clicked="btnCal_Clicked" /> </Grid> </ContentPage>
그냥 화면 하나 짜리 간단 계산기 이므로 계산기 폼만 MainPage.Xaml 에 작성해 준다.
그럼 이렇게 폼이 만들어지는데, 안드로이드에선 이렇게 보이지만...
아이폰에선 이렇게 보인다. 각 디바이스의 버튼 스타일이 달라서 어쩔수가 없음.
암튼 폼은 이렇게 만들면 되고...
코드는...
MainPage.Xaml.cs 에다 이렇게 생성...
using System;
using Xamarin.Forms;
namespace SonCalc
{
public partial class MainPage : ContentPage
{
double? NumBefore;
double? NumAfter;
Boolean isClear;
string strProc;
public MainPage()
{
NumBefore = null;
NumAfter = null;
isClear = false;
strProc = null;
InitializeComponent();
}
private void btnCal_Clicked(object sender, EventArgs e)
{
Button getbutton = (sender as Button);
var lblPrintNumber = this.FindByName<Label>("lblPrintNumber");
switch (getbutton.Text)
{
case "1":
case "2":
case "3":
case "4":
case "5":
case "6":
case "7":
case "8":
case "9":
case "0":
if (lblPrintNumber.Text.Equals("0") || isClear.Equals(true))
{
if (String.IsNullOrEmpty(strProc))
{
NumBefore = null;
}
lblPrintNumber.Text = getbutton.Text;
isClear = false;
}
else
{
lblPrintNumber.Text += getbutton.Text;
}
break;
case ".": // 소숫점 처리
if (!lblPrintNumber.Text.Contains("."))
{
lblPrintNumber.Text += getbutton.Text;
isClear = false;
}
break;
case "+":
case "*":
case "/":
case "-":
ProcCal();
strProc = getbutton.Text;
break;
case "=":
ProcCal();
strProc = null;
isClear = true;
break;
case "AC":
NumBefore = null;
NumAfter = null;
strProc = null;
lblPrintNumber.Text = "0";
break;
}
return;
}
/// <summary>
/// 입력된 값으로 결과값 계산
/// </summary>
private void ProcCal()
{
if (NumBefore.HasValue)
{
NumAfter = Convert.ToDouble(lblPrintNumber.Text);
if (isClear.Equals(false))
{
switch (strProc)
{
case "+":
NumBefore += NumAfter;
break;
case "-":
NumBefore -= NumAfter;
break;
case "/":
NumBefore /= NumAfter;
break;
case "*":
NumBefore *= NumAfter;
break;
}
NumAfter = null;
lblPrintNumber.Text = NumBefore.ToString();
}
}
else
{
NumBefore = Convert.ToDouble(lblPrintNumber.Text);
}
isClear = true;
}
}
}
이렇게 다 만들어 놓고 실행해 보면...
이렇게 간단하게 계산기가 완성된다.
아마 버그도 좀 있을 테고, 에러처리 루틴 같은게 빠져 있지만, 간단한 사칙연산은 별 무리 없이 처리한다.
