DragAndDrop core

Lattice.UI.Docking.WinUI/Controls/LatticeSplitter.cs

@@ -0,0 +1,51 @@
+using Lattice.Core.Docking.Models;
+using Microsoft.UI.Input;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Input;
+using Microsoft.UI.Xaml.Media;
+using System;
+
+namespace Lattice.UI;
+
+public class LatticeSplitter : Control
+{
+    public LatticeSplitter()
+    {
+        this.DefaultStyleKey = typeof(LatticeSplitter);
+        this.ManipulationMode = ManipulationModes.TranslateX | ManipulationModes.TranslateY;
+
+        this.PointerEntered += (s, e) =>
+            this.ProtectedCursor = InputSystemCursor.Create(InputSystemCursorShape.SizeWestEast);
+        this.PointerExited += (s, e) =>
+            this.ProtectedCursor = null;
+
+        this.ManipulationDelta += OnManipulationDelta;
+    }
+
+    private void OnManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
+    {
+        // 1. Находим модель DockGroup через DataContext
+        if (this.DataContext is not DockGroup group) return;
+
+        // 2. Находим родительский Grid, чтобы знать общие размеры
+        if (VisualTreeHelper.GetParent(this) is not Grid parentGrid ||
+            parentGrid.ActualWidth <= 0 || parentGrid.ActualHeight <= 0)
+            return;
+
+        double totalSize = group.Orientation == SplitDirection.Horizontal
+            ? parentGrid.ActualWidth
+            : parentGrid.ActualHeight;
+
+        if (totalSize <= 0) return;
+
+        // 3. Вычисляем изменение Ratio (от -1.0 до 1.0)
+        double delta = group.Orientation == SplitDirection.Horizontal
+            ? e.Delta.Translation.X
+            : e.Delta.Translation.Y;
+
+        double ratioChange = delta / totalSize;
+
+        // 4. Обновляем модель (с ограничением от 0.05 до 0.95)
+        group.SplitRatio = Math.Clamp(group.SplitRatio + ratioChange, 0.05, 0.95);
+    }
+}