Egy példa megvalósítás
<Window x:Class="SZGYA_WPF_Calculator.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:SZGYA_WPF_Calculator"
mc:Ignorable="d"
Title="Calculator" Height="600" Width="450">
<DockPanel Height="Auto" VerticalAlignment="Stretch">
<StackPanel DockPanel.Dock="Top">
<Label x:Name="lblSecondary" Content="[szamolas placeholder]" HorizontalAlignment="Stretch" Margin="24,0" VerticalContentAlignment="Center" Grid.ColumnSpan="4" HorizontalContentAlignment="Right" Height="34" FontSize="16"/>
<Label x:Name="lblCurrent" Content="[eredmeny]" HorizontalAlignment="Stretch" Margin="12,0" Grid.ColumnSpan="4" Height="65" FontSize="36" VerticalContentAlignment="Center" HorizontalContentAlignment="Right"/>
<CheckBox x:Name="chkTudomanyos" HorizontalAlignment="Left" VerticalContentAlignment="Center" VerticalAlignment="Center" Content="Tudományos" FontSize="20" Margin="24,0" Checked="chkTudomanyos_Checked" Unchecked="chkTudomanyosUnchecked"/>
</StackPanel>
<Grid x:Name="gridCalc" VerticalAlignment="Stretch" DockPanel.Dock="Bottom" Margin="10,10">
<Grid.Resources>
<Style TargetType="{x:Type Button}">
<Setter Property="Margin" Value="5,5" />
<Style.Resources>
<Style TargetType="Border">
<Setter Property="CornerRadius" Value="5" />
</Style>
</Style.Resources>
</Style>
</Grid.Resources>
<Grid.RowDefinitions>
<RowDefinition Height="0"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
</Grid.ColumnDefinitions>
<Button Content="[nincs impl]" Grid.Row="0" Grid.Column="0"/>
<Button x:Name="btnGyok" Content="√x" Grid.Row="0" Grid.Column="1" Click="opHandler"/>
<Button x:Name="btnNegyzet" Content="x²" Grid.Row="0" Grid.Column="2" Click="opHandler"/>
<Button x:Name="btnHatvany" Content="^" Grid.Row="0" Grid.Column="3" Click="opHandler"/>
<Button x:Name="btnReciprok" Content="⅟x" Grid.Row="1" Grid.Column="0" Click="opHandler"/>
<Button x:Name="btnDelete" Content="C" Grid.Row="1" Grid.Column="1" Click="btnDelete_Click"/>
<Button x:Name="btnDeletePartial" Content="Ce" Grid.Row="1" Grid.Column="2" Click="btnDeletePartial_Click"/>
<Button x:Name="btn7" Content="7" Grid.Row="2" Grid.Column="0" Click="numberBtnClick"/>
<Button x:Name="btn8" Content="8" Grid.Row="2" Grid.Column="1" Click="numberBtnClick"/>
<Button x:Name="btn9" Content="9" Grid.Row="2" Grid.Column="2" Click="numberBtnClick"/>
<Button x:Name="btn4" Content="4" Grid.Row="3" Grid.Column="0" Click="numberBtnClick"/>
<Button x:Name="btn5" Content="5" Grid.Row="3" Grid.Column="1" Click="numberBtnClick"/>
<Button x:Name="btn6" Content="6" Grid.Row="3" Grid.Column="2" Click="numberBtnClick"/>
<Button x:Name="btn1" Content="1" Grid.Row="4" Grid.Column="0" Click="numberBtnClick"/>
<Button x:Name="btn2" Content="2" Grid.Row="4" Grid.Column="1" Click="numberBtnClick"/>
<Button x:Name="btn3" Content="3" Grid.Row="4" Grid.Column="2" Click="numberBtnClick"/>
<Button x:Name="btnNegate" Content="±" Grid.Row="5" Grid.Column="0" Click="opHandler"/>
<Button x:Name="btn0" Content="0" Grid.Row="5" Grid.Column="1" Click="numberBtnClick"/>
<Button x:Name="btnTizedes" Content="," Grid.Row="5" Grid.Column="2" Click="numberBtnClick"/>
<Button x:Name="btonOsztas" Content="/" Grid.Row="1" Grid.Column="4" Click="opHandler"/>
<Button x:Name="btnSzorzas" Content="X" Grid.Row="2" Grid.Column="4" Click="opHandler"/>
<Button x:Name="btnMinusz" Content="-" Grid.Row="3" Grid.Column="4" Click="opHandler"/>
<Button x:Name="btnPlusz" Content="+" Grid.Row="4" Grid.Column="4" Click="opHandler"/>
<Button x:Name="btnEgyenlo" Content="=" Grid.Row="5" Grid.Column="4" Click="calculateResult"/>
</Grid>
</DockPanel>
</Window>
using System.Net.Http;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using static System.Net.Mime.MediaTypeNames;
namespace SZGYA_WPF_Calculator
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private double last = 0;
private double current = 0;
private string currentStr = "";
private string secondaryStr = "";
private string op = "";
public MainWindow()
{
InitializeComponent();
updateDisplay("0");
updateSecondaryDisplay(string.Empty);
this.KeyDown += new KeyEventHandler(OnButtonKeyDown);
}
private void OnButtonKeyDown(object sender, KeyEventArgs e)
{
var keyDown = e.Key.ToString().Last();
if (keyDown >= '0' && keyDown <= '9') updateNum($"{keyDown}");
}
private void numberBtnClick(object sender, RoutedEventArgs e)
{
Button b = (Button)sender;
updateNum(b.Content.ToString());
}
void updateNum(string num)
{
if (num == "," && current == 0) updateDisplay(num);
else updateDisplay(num, current == 0);
}
private void btnDelete_Click(object sender, RoutedEventArgs e)
{
updateDisplay("0", true);
updateSecondaryDisplay(string.Empty);
}
private void btnDeletePartial_Click(object sender, RoutedEventArgs e)
{
updateDisplay("0", true);
}
private void opHandler(object sender, RoutedEventArgs e)
{
Button b = (Button)sender;
if (op == string.Empty)
{
op = b.Content.ToString();
last = current;
if (op == "x²")
{
updateSecondaryDisplay($"{last}²");
current = Math.Pow(current, 2);
updateDisplay($"{current}", true);
op = string.Empty;
}
else if (op == "√x")
{
updateSecondaryDisplay($"√{current}");
current = Math.Sqrt(current);
updateDisplay($"{current}", true);
op = string.Empty;
}
else if (op == "±")
{
updateSecondaryDisplay($"negate({current})");
current = -current;
updateDisplay($"{current}", true);
op = string.Empty;
}
else if (op == "⅟x")
{
updateSecondaryDisplay($"⅟({current})");
if (current == 0)
{
lblCurrent.Content = "Nullával nem lehet osztani";
op = string.Empty;
}
else
{
current = 1 / current;
updateDisplay($"{current}", true);
op = string.Empty;
}
}
else
{
updateDisplay(string.Empty);
updateSecondaryDisplay($"{last} {op}");
}
}
else
{
op = b.Content.ToString();
updateSecondaryDisplay($"{last} {op}");
}
}
private void calculateResult(object sender, RoutedEventArgs e)
{
updateSecondaryDisplay($"{last} {op} {current}");
switch (op)
{
case "+":
last = last + current;
updateDisplay($"{last}", true);
op = string.Empty;
break;
case "-":
last = last - current;
updateDisplay($"{last}", true);
op = string.Empty;
break;
case "X":
last = last * current;
updateDisplay($"{last}", true);
op = string.Empty;
break;
case "/":
if (current == 0)
{
lblCurrent.Content = "Nullával nem lehet osztani";
op = string.Empty;
break;
}
last = last / current;
updateDisplay($"{last}", true);
op = string.Empty;
break;
case "^":
last = Math.Pow(last, current);
updateDisplay($"{last}", true);
op = string.Empty;
break;
default:
break;
}
}
private void updateDisplay(string content, bool clear = false)
{
if (clear || content == string.Empty) currentStr = string.Empty;
currentStr += content;
current = currentStr != string.Empty ? double.Parse(currentStr) : 0;
lblCurrent.Content = currentStr;
}
private void updateSecondaryDisplay(string content)
{
secondaryStr = content;
lblSecondary.Content = secondaryStr;
}
private void chkTudomanyos_Checked(object sender, RoutedEventArgs e)
{
gridCalc.RowDefinitions[0].Height = new GridLength(1, GridUnitType.Star);
}
private void chkTudomanyosUnchecked(object sender, RoutedEventArgs e)
{
gridCalc.RowDefinitions[0].Height = new GridLength(0, GridUnitType.Pixel);
}
}
}
