Initial commit

DelauneyTriangulation/Views/MainWindow.axaml.cs

@@ -0,0 +1,69 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Shapes;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+using Avalonia.Media;
+
+namespace DelauneyTriangulation.Views;
+
+public partial class MainWindow : Window
+{
+    private bool _isPanning;
+    private Point _panStart;
+    private Vector _panOffset = new();
+    private readonly TranslateTransform _panTransform = new();
+    
+    public MainWindow()
+    {
+        InitializeComponent();
+        SceneContent.RenderTransform = _panTransform;
+    }
+    
+    private void OnTitleBarPointerPressed(object? sender, PointerPressedEventArgs e)
+    {
+        if (!e.GetCurrentPoint(this).Properties.IsLeftButtonPressed) return;
+        BeginMoveDrag(e);
+    }
+    private void OnTitleBarDoubleTapped(object? sender, RoutedEventArgs e) => WindowState = WindowState == WindowState.Maximized ? WindowState.Normal : WindowState.Maximized;
+    private void Scene_OnPointerPressed(object? sender, PointerPressedEventArgs e)
+    {
+        if (!e.GetCurrentPoint(Scene).Properties.IsLeftButtonPressed)
+            return;
+
+        _isPanning = true;
+        _panStart = e.GetPosition(this);
+        Scene.Cursor = new Cursor(StandardCursorType.SizeAll);
+        e.Handled = true;
+    }
+
+    private void Scene_OnPointerMoved(object? sender, PointerEventArgs e)
+    {
+        if (!_isPanning) return;
+
+        var pos = e.GetPosition(this);
+        var delta = pos - _panStart;
+        var current = _panOffset + delta;
+        _panTransform.X = current.X;
+        _panTransform.Y = current.Y;
+        e.Handled = true;
+    }
+
+    private void Scene_OnPointerReleased(object? sender, PointerReleasedEventArgs e)
+    {
+        if (!_isPanning) return;
+
+        var pos = e.GetPosition(this);
+        var delta = pos - _panStart;
+        _panOffset += delta;
+
+        _isPanning = false;
+        Scene.Cursor = new Cursor(StandardCursorType.Arrow);
+        e.Handled = true;
+    }
+
+    private void Scene_OnWheel(object? sender, PointerWheelEventArgs e)
+    {
+        
+    }
+}