feat: add column state

src/DynamicTreeDataGrid/DynamicFlatTreeDataGridSource.cs

@@ -16,6 +16,7 @@
 using DynamicData.Aggregation;
 
 using DynamicTreeDataGrid.Models.Columns;
+using DynamicTreeDataGrid.State;
 
 namespace DynamicTreeDataGrid;
 
@@ -30,6 +31,9 @@ public class DynamicFlatTreeDataGridSource<TModel, TModelKey> : NotifyingBase, I
     private readonly CompositeDisposable _d = new();
     private readonly ReadOnlyObservableCollection<TModel> _items;
 
+    public IObservable<int> FilteredCount { get; }
+    public IObservable<int> TotalCount { get; }
+
     public DynamicFlatTreeDataGridSource(IObservable<IChangeSet<TModel, TModelKey>> changes, IScheduler mainThreadScheduler) {
         _itemsFilter = _filterSource;
         TotalCount = changes.Count();
@@ -62,9 +66,15 @@ public DynamicFlatTreeDataGridSource(IObservable<IChangeSet<TModel, TModelKey>>
         // TODO: Fix CreateRows()? Does this now work since we set the comparer?
     }
 
+    public IEnumerable<ColumnState> GetColumnStates() {
+	    IList<ColumnState> states = [];
+	    for (var i = 0; i < Columns.Count; i++) {
+		    var column = Columns[i];
+		    states.Add(new ColumnState(column.Name) { Visible = column.Visible, Index = i, });
+	    }
+	    return states;
+    }
 
-    public IObservable<int> FilteredCount { get; }
-    public IObservable<int> TotalCount { get; }
 
     public DynamicColumnList<TModel> Columns { get; } = [];
     IDynamicColumns IDynamicTreeDataGridSource.Columns => Columns;

src/DynamicTreeDataGrid/IDynamicTreeDataGridSource`1.cs

@@ -1,8 +1,11 @@
 using Avalonia.Controls;
 
+using DynamicTreeDataGrid.State;
+
 namespace DynamicTreeDataGrid;
 
 public interface IDynamicTreeDataGridSource<TModel> : ITreeDataGridSource<TModel>, IDynamicTreeDataGridSource {
 
     // TODO: Add filter, state, maybe sort?
+    IEnumerable<ColumnState> GetColumnStates();
 }

src/DynamicTreeDataGrid/State/ColumnState.cs

@@ -1,7 +1,7 @@
 namespace DynamicTreeDataGrid.State;
 
-public class ColumnState {
-    public string Name { get; set; } = "";
+public record ColumnState(string Name) {
+    public string Name { get; init; } = Name;
     public int Index { get; set; }
-    public bool Visible { get; set; }
+    public bool Visible { get; set; } = true;
 }