Merge pull request #773 from yangjieshao/fix_issues_590

修复 IPv4Box PinCode TimeBox  对 Delete 键的支持

src/Ursa/Controls/IPv4Box/IPv4Box.cs

@@ -26,7 +26,7 @@ public enum IPv4BoxInputMode
 [TemplatePart(PART_SecondTextPresenter, typeof(TextPresenter))]
 [TemplatePart(PART_ThirdTextPresenter, typeof(TextPresenter))]
 [TemplatePart(PART_FourthTextPresenter, typeof(TextPresenter))]
-public class IPv4Box: TemplatedControl
+public class IPv4Box : TemplatedControl
 {
     public const string PART_FirstTextPresenter = "PART_FirstTextPresenter";
     public const string PART_SecondTextPresenter = "PART_SecondTextPresenter";
@@ -214,7 +214,13 @@ public class IPv4Box: TemplatedControl
 
         if (e.Key == Key.Back)
         {
-            DeleteImplementation(_currentActivePresenter);
+            DeleteImplementation(_currentActivePresenter, isDeleteKey: false);
+            e.Handled = true;
+            return;
+        }
+        if (e.Key == Key.Delete)
+        {
+            DeleteImplementation(_currentActivePresenter, isDeleteKey: true);
             e.Handled = true;
             return;
         }
@@ -474,31 +480,69 @@ public class IPv4Box: TemplatedControl
         }
     }
 
-    private void DeleteImplementation(TextPresenter? presenter)
+    /// <summary>
+    /// </summary>
+    /// <param name="presenter"></param>
+    /// <param name="isDeleteKey">del 键 (从前往后删)</param>
+    private void DeleteImplementation(TextPresenter? presenter, bool isDeleteKey)
     {
-        if(presenter is null) return;
+        if (presenter is null) return;
         var oldText = presenter.Text ?? string.Empty;
         if (presenter.SelectionStart != presenter.SelectionEnd)
         {
             presenter.DeleteSelection();
             presenter.ClearSelection();
         }
-        else if (string.IsNullOrWhiteSpace(oldText) || presenter.CaretIndex == 0)
+        else if (isDeleteKey)
         {
-            presenter.HideCaret();
+            if (string.IsNullOrWhiteSpace(oldText) || presenter.CaretIndex == oldText.Length)
-            MoveToPreviousTextPresenter(presenter);
-            if (_currentActivePresenter != null)
             {
-                _currentActivePresenter.ShowCaret();
+                presenter.HideCaret();
-                _currentActivePresenter.MoveCaretToEnd();
+                var oldActivePresenter = _currentActivePresenter;
+                MoveToNextPresenter(presenter, selectAllAfterMove: false);
+                if (_currentActivePresenter != null)
+                {
+                    _currentActivePresenter.ShowCaret();
+                    if (!ReferenceEquals(oldActivePresenter, _currentActivePresenter))
+                    {
+                        _currentActivePresenter.MoveCaretToStart();
+                    }
+                }
+            }
+            else
+            {
+                var index = presenter.CaretIndex;
+                var newText = string.Empty;
+                if (index == 0)
+                {
+                    newText = oldText.Substring(1, oldText.Length - 1);
+                }
+                else
+                {
+                    newText = oldText.Substring(0, index) + oldText.Substring(index + 1);
+                }
+                presenter.Text = newText;
             }
         }
         else
         {
-            int index = presenter.CaretIndex;
+            if (string.IsNullOrWhiteSpace(oldText) || presenter.CaretIndex == 0)
-            string newText = oldText.Substring(0, index - 1) + oldText.Substring(Math.Min(index, oldText.Length));
+            {
-            presenter.MoveCaretHorizontal(LogicalDirection.Backward);
+                presenter.HideCaret();
-            presenter.Text = newText;
+                MoveToPreviousTextPresenter(presenter);
+                if (_currentActivePresenter != null)
+                {
+                    _currentActivePresenter.ShowCaret();
+                    _currentActivePresenter.MoveCaretToEnd();
+                }
+            }
+            else
+            {
+                int index = presenter.CaretIndex;
+                string newText = oldText.Substring(0, index - 1) + oldText.Substring(Math.Min(index, oldText.Length));
+                presenter.MoveCaretHorizontal(LogicalDirection.Backward);
+                presenter.Text = newText;
+            }
         }
     }
 

src/Ursa/Controls/PinCode/PinCode.cs

@@ -161,7 +161,6 @@ public class PinCode : TemplatedControl
 
     protected async void OnPreviewKeyDown(KeyEventArgs e)
     {
-        TextBox b = new TextBox();
         var pasteKeys = Application.Current?.PlatformSettings?.HotkeyConfiguration.Paste;
         if (pasteKeys?.Any(a => a.Matches(e)) == true)
         {
@@ -209,6 +208,17 @@ public class PinCode : TemplatedControl
             _currentIndex--;
             _itemsControl?.ContainerFromIndex(_currentIndex)?.Focus();
         }
+        else if (e.Key == Key.Delete && _currentIndex < Digits.Count)
+        {
+            _currentIndex = MathHelpers.SafeClamp(_currentIndex, 0, Count - 1);
+            var presenter = _itemsControl?.ContainerFromIndex(_currentIndex) as PinCodeItem;
+            if (presenter is null) return;
+            Digits[_currentIndex] = string.Empty;
+            presenter.Text = string.Empty;
+            if (_currentIndex == Digits.Count-1) return;
+            _currentIndex++;
+            _itemsControl?.ContainerFromIndex(_currentIndex)?.Focus();
+        }
         else if (e.Key is Key.Left or Key.FnLeftArrow)
         {
             _currentIndex--;

src/Ursa/Controls/TimeBox.cs

@@ -251,7 +251,11 @@ public class TimeBox : TemplatedControl
         }
         else if (e.Key == Key.Back)
         {
-            DeleteImplementation(_currentActiveSectionIndex.Value);
+            DeleteImplementation(_currentActiveSectionIndex.Value, isDeleteKey: false);
+        }
+        else if (e.Key == Key.Delete)
+        {
+            DeleteImplementation(_currentActiveSectionIndex.Value, isDeleteKey: true);
         }
         else if (e.Key == Key.Right)
         {
@@ -596,7 +600,11 @@ public class TimeBox : TemplatedControl
         }
     }
 
-    private void DeleteImplementation(int index)
+    /// <summary>
+    /// </summary>
+    /// <param name="index"></param>
+    /// <param name="isDeleteKey">del 键 (从前往后删)</param>
+    private void DeleteImplementation(int index, bool isDeleteKey)
     {
         if (index < 0 || index > 3) return;
         var oldText = _presenters[index].Text??string.Empty;
@@ -605,17 +613,41 @@ public class TimeBox : TemplatedControl
             _presenters[index].DeleteSelection();
             _presenters[index].ClearSelection();
         }
-        else if (string.IsNullOrWhiteSpace(oldText) || _presenters[index].CaretIndex == 0)
+        else if (isDeleteKey)
         {
-            MoveToPreviousSection(index);
+            if (string.IsNullOrWhiteSpace(oldText) || _presenters[index].CaretIndex == oldText.Length)
+            {
+                MoveToNextSection(index);
+            }
+            else
+            {
+                int caretIndex = _presenters[index].CaretIndex;
+                var newText = string.Empty;
+                if (caretIndex == 0)
+                {
+                    newText = oldText.Substring(1, oldText.Length - 1);
+                }
+                else
+                {
+                    newText = oldText.Substring(0, caretIndex) + oldText.Substring(caretIndex + 1);
+                }
+                _presenters[index].Text = newText;
+            }
         }
         else
         {
-            int caretIndex = _presenters[index].CaretIndex;
+            if (string.IsNullOrWhiteSpace(oldText) || _presenters[index].CaretIndex == 0)
-            string newText = oldText.Substring(0, caretIndex - 1) +
+            {
-                             oldText.Substring(Math.Min(caretIndex, oldText.Length));
+                MoveToPreviousSection(index);
-            _presenters[index].MoveCaretHorizontal(LogicalDirection.Backward);
+            }
-            _presenters[index].Text = newText;
+            else
+            {
+                int caretIndex = _presenters[index].CaretIndex;
+                string newText = oldText.Substring(0, caretIndex - 1) +
+                                 oldText.Substring(Math.Min(caretIndex, oldText.Length));
+                _presenters[index].MoveCaretHorizontal(LogicalDirection.Backward);
+                _presenters[index].Text = newText;
+            }
         }
     }