beta

EditTextBlock/EditableTextBlockAdorner.cs

@@ -0,0 +1,101 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+
+namespace GeekDesk.EditTextBlock
+{
+    /// <summary>
+    /// Adorner class which shows textbox over the text block when the Edit mode is on.
+    /// </summary>
+    public class EditableTextBlockAdorner : Adorner
+    {
+        private readonly VisualCollection _collection;
+
+        private readonly TextBox _textBox;
+
+        private readonly TextBlock _textBlock;
+
+        public EditableTextBlockAdorner(EditableTextBlock adornedElement)
+            : base(adornedElement)
+        {
+            _collection = new VisualCollection(this);
+            _textBox = new TextBox();
+            _textBlock = adornedElement;
+            Binding binding = new Binding("Text") { Source = adornedElement };
+            _textBox.SetBinding(TextBox.TextProperty, binding);
+            _textBox.AcceptsReturn = true;
+            _textBox.MaxLength = adornedElement.MaxLength;
+            _textBox.KeyUp += _textBox_KeyUp;
+            _collection.Add(_textBox);
+        }
+
+        void _textBox_KeyUp(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Enter)
+            {
+                _textBox.Text = _textBox.Text.Replace("\r\n", string.Empty);
+                BindingExpression expression = _textBox.GetBindingExpression(TextBox.TextProperty);
+                if (null != expression)
+                {
+                    expression.UpdateSource();
+                }
+            }
+        }
+
+        protected override Visual GetVisualChild(int index)
+        {
+            return _collection[index];
+        }
+
+        protected override int VisualChildrenCount
+        {
+            get
+            {
+                return _collection.Count;
+            }
+        }
+
+        protected override Size ArrangeOverride(Size finalSize)
+        {
+            _textBox.Arrange(new Rect(0, 0, _textBlock.DesiredSize.Width + 50, _textBlock.DesiredSize.Height * 1.5));
+            _textBox.Focus();
+            return finalSize;
+        }
+
+        protected override void OnRender(DrawingContext drawingContext)
+        {
+            drawingContext.DrawRectangle(null, new Pen
+            {
+                Brush = Brushes.Gold,
+                Thickness = 2
+            }, new Rect(0, 0, _textBlock.DesiredSize.Width + 50, _textBlock.DesiredSize.Height * 1.5));
+        }
+
+        public event RoutedEventHandler TextBoxLostFocus
+        {
+            add
+            {
+                _textBox.LostFocus += value;
+            }
+            remove
+            {
+                _textBox.LostFocus -= value;
+            }
+        }
+
+        public event KeyEventHandler TextBoxKeyUp
+        {
+            add
+            {
+                _textBox.KeyUp += value;
+            }
+            remove
+            {
+                _textBox.KeyUp -= value;
+            }
+        }
+    }
+}