тест

GraphPage.xaml.cs

@@ -10,6 +10,8 @@ namespace NotesDataAnalyst
         private PointF _initialNodePosition; // Õðàíèò íà÷àëüíóþ ïîçèöèþ íîäû
         private PointF _initialTouchPosition; // Õðàíèò íà÷àëüíóþ ïîçèöèþ êàñàíèÿ
         private SizeF _initialNodeSize; // Õðàíèò íà÷àëüíûé ðàçìåð íîäû
+        private DateTime tapStartTime;
+        private const int longPressDuration = 3000; // 3 ñåêóíäû â ìèëëèñåêóíäàõ
 
         private readonly List<GraphNode> _nodes = new();
         private readonly List<GraphConnection> _connections = new();
@@ -34,6 +36,48 @@ namespace NotesDataAnalyst
             var tapGesture = new TapGestureRecognizer();
             tapGesture.Tapped += OnCanvasTapped;
             canvasView.GestureRecognizers.Add(tapGesture);
+
+            var tapGestureRecognizer = new TapGestureRecognizer();
+            tapGestureRecognizer.Tapped += OnTapped;
+            canvasView.GestureRecognizers.Add(tapGestureRecognizer);
+        }
+
+
+        private void OnTapped(object sender, EventArgs e)
+        {
+            tapStartTime = DateTime.Now;
+
+            Device.StartTimer(TimeSpan.FromMilliseconds(longPressDuration), () =>
+            {
+                if ((DateTime.Now - tapStartTime).TotalMilliseconds >= longPressDuration)
+                {
+                    // Çäåñü âûïîëíÿåòñÿ äåéñòâèå ïðè äëèòåëüíîì íàæàòèè
+                    OnNodeLongPressed();
+                }
+                return false; // Îñòàíàâëèâàåì òàéìåð
+            });
+        }
+
+        private void OnNodeLongPressed()
+        {
+            if (_selectedNode != null)
+            {
+                // Äîáàâëÿåì äî÷åðíþþ íîäó ðÿäîì ñ àêòèâíîé
+                var childNode = new GraphNode
+                {
+                    Text = "Äî÷åðíÿÿ íîäà",
+                    Position = new Point(_selectedNode.Position.X + 50, _selectedNode.Position.Y + 50),
+                    Size = new Size(150, 100)
+                };
+
+                _nodes.Add(childNode);
+                _connections.Add(new GraphConnection { FromNode = _selectedNode, ToNode = childNode });
+
+                canvasView.Invalidate(); // Ïåðåðèñîâûâàåì
+            }
+
+            // Çäåñü ðåàëèçóéòå äåéñòâèå ïðè äëèòåëüíîì íàæàòèè
+            // DisplayAlert("Äëèòåëüíîå íàæàòèå", "Âû íàæàëè è óäåðæèâàëè ýëåìåíò", "ÎÊ");
         }
 
         private void OnNodeTapped(object sender, TappedEventArgs e)