basic design

2023-11-24 10:47:00 +06:00
commit e0adb55d43
9 changed files with 231 additions and 0 deletions
--- a/SharpCalculator.Avalonia/MainWindow.axaml.cs
+++ b/SharpCalculator.Avalonia/MainWindow.axaml.cs
@@ -0,0 +1,90 @@
+using System;
+using System.Globalization;
+using System.Text;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace SharpCalculator.Avalonia;
+
+public partial class MainWindow : Window
+{
+    public MainWindow()
+    {
+        InitializeComponent();
+    }
+
+    private double _rezult;
+    private StringBuilder currentNumberB = new();
+
+    private double CompleteCurrentNumber()
+    {
+        var n = double.Parse(currentNumberB.ToString(), CultureInfo.InvariantCulture);
+        currentNumberB.Clear();
+        return n;
+    }
+
+    private void UpdateOutput()
+    {
+        Output.Text = "= " + _rezult;
+    }
+
+    private Func<double, double, double> prevOperation = (_, firstN) => firstN;
+    
+    private void TryUpdateRezult(Func<double, double, double> operation, string text)
+    {
+        if (currentNumberB.Length > 0)
+        {
+            _rezult = prevOperation(_rezult, CompleteCurrentNumber());
+            prevOperation = operation;
+            Input.Text += " " + text + " ";
+        }
+
+        UpdateOutput();
+    }
+
+    private void NumberButton_OnClick(object? sender, RoutedEventArgs e)
+    {
+        if (sender is not Button button)
+            throw new Exception();
+        string text = button.Content?.ToString()!;
+        Input.Text += text;
+        currentNumberB.Append(text);
+    }
+
+    private void OperationButton_OnClick(object? sender, RoutedEventArgs e)
+    {
+        if (sender is not Button button)
+            throw new Exception();
+        string text = button.Content?.ToString()!;
+        switch (text)
+        {
+            case "+":
+                TryUpdateRezult((a, b) => a + b, text);
+                break;
+            case "-":
+                TryUpdateRezult((a, b) => a - b, text);
+                break;
+            case "*":
+                TryUpdateRezult((a, b) => a * b, text);
+                break;
+            case "/":
+                TryUpdateRezult((a, b) => a / b, text);
+                break;
+            case "^":
+                TryUpdateRezult(Math.Pow, text);
+                break;
+            case "=":
+                TryUpdateRezult((a, _) => a, "");
+                break;
+            default:
+                throw new Exception("incorrect button text: " + text);
+        }
+    }
+
+    private void ClearButton_OnClick(object? sender, RoutedEventArgs e)
+    {
+        _rezult = 0;
+        UpdateOutput();
+        Input.Text = "";
+    }
+}