Sicherung

2023-01-20 16:09:00 +01:00
parent e5257d8413
commit b684704bf8
139 changed files with 95678 additions and 499 deletions
--- a/AutoCompleteTextBox/Editors/SelectionAdapter.cs
+++ b/AutoCompleteTextBox/Editors/SelectionAdapter.cs
@@ -0,0 +1,122 @@
+using System.Diagnostics;
+using System.Windows.Controls.Primitives;
+using System.Windows.Input;
+
+namespace AutoCompleteTextBox.Editors
+{
+    public class SelectionAdapter
+    {
+        public class PreSelectionAdapterFinishArgs {
+            public EventCause cause;
+            public bool is_cancel;
+            public bool handled;
+        }
+
+        #region "Fields"
+        #endregion
+
+        #region "Constructors"
+
+        public SelectionAdapter(Selector selector)
+        {
+            SelectorControl = selector;
+            SelectorControl.PreviewMouseUp += OnSelectorMouseDown;
+        }
+
+        #endregion
+
+        #region "Events"
+
+        public enum EventCause { Other, PopupClosed, ItemClicked, EnterPressed, EscapePressed, TabPressed, MouseDown}
+        public delegate void CancelEventHandler(EventCause cause);
+
+        public delegate void CommitEventHandler(EventCause cause);
+
+        public delegate void SelectionChangedEventHandler();
+
+        public event CancelEventHandler Cancel;
+        public event CommitEventHandler Commit;
+        public event SelectionChangedEventHandler SelectionChanged;
+        #endregion
+
+        #region "Properties"
+
+        public Selector SelectorControl { get; set; }
+
+        #endregion
+
+        #region "Methods"
+
+        public void HandleKeyDown(KeyEventArgs key)
+        {
+            switch (key.Key)
+            {
+                case Key.Down:
+                    IncrementSelection();
+                    break;
+                case Key.Up:
+                    DecrementSelection();
+                    break;
+                case Key.Enter:
+                    Commit?.Invoke(EventCause.EnterPressed);
+
+                    break;
+                case Key.Escape:
+                    Cancel?.Invoke(EventCause.EscapePressed);
+
+                    break;
+                case Key.Tab:
+                    Commit?.Invoke(EventCause.TabPressed);
+
+                    break;
+                default:
+                    return;
+            }
+            key.Handled = true;
+        }
+
+        private void DecrementSelection()
+        {
+            if (SelectorControl.SelectedIndex == -1)
+            {
+                SelectorControl.SelectedIndex = SelectorControl.Items.Count - 1;
+            }
+            else
+            {
+                SelectorControl.SelectedIndex -= 1;
+            }
+
+            SelectionChanged?.Invoke();
+        }
+
+        private void IncrementSelection()
+        {
+            if (SelectorControl.SelectedIndex == SelectorControl.Items.Count - 1)
+            {
+                SelectorControl.SelectedIndex = -1;
+            }
+            else
+            {
+                SelectorControl.SelectedIndex += 1;
+            }
+
+            SelectionChanged?.Invoke();
+        }
+
+        private void OnSelectorMouseDown(object sender, MouseButtonEventArgs e)
+        {
+            // If sender is the RepeatButton from the scrollbar we need to 
+            // to skip this event otherwise focus get stuck in the RepeatButton
+            // and list is scrolled up or down til the end.
+            if (e.OriginalSource.GetType() != typeof(RepeatButton))
+            {
+                Commit?.Invoke(EventCause.MouseDown);
+                e.Handled = true;
+            }
+        }
+
+        #endregion
+
+    }
+
+}