回答編集履歴

フォーカス移動に対応

2021/12/09 15:55

投稿

f-miyu

スコア1625

test CHANGED Viewed

@@ -46,6 +46,8 @@
                 Control.Click -= Control_Click;
+                Control.FocusChange -= Control_FocusChange;
             }
         }
@@ -58,6 +60,8 @@
             Control.Click += Control_Click;
+            Control.FocusChange += Control_FocusChange;
         }
     }
@@ -118,9 +122,201 @@
         }
+    }
+    protected override void OnFocusChanged(bool gainFocus, [GeneratedEnum] FocusSearchDirection direction, Android.Graphics.Rect previouslyFocusedRect)
+    {
+        base.OnFocusChanged(gainFocus, direction, previouslyFocusedRect);
+    }
+    protected override void Dispose(bool disposing)
+    {
+        if (disposing)
+        {
+            if (Control != null)
+            {
+                Control.Click -= Control_Click;
+                Control.FocusChange -= Control_FocusChange;
+            }
+        }
+        base.Dispose(disposing);
+    }
+    private void Control_Click(object sender, EventArgs e)
+    {
+        OnClick();
+    }
+    private void OnClick()
+    {
+        Picker model = Element;
+        if (_dialog != null)
+            return;
+        var picker = new NumberPicker(Context);
+        if (model.Items != null && model.Items.Any())
+        {
+            picker.MaxValue = model.Items.Count - 1;
+            picker.MinValue = 0;
+            picker.SetDisplayedValues(model.Items.ToArray());
+            picker.WrapSelectorWheel = false;
+            picker.DescendantFocusability = Android.Views.DescendantFocusability.BlockDescendants;
+            picker.Value = model.SelectedIndex;
+        }
+        var layout = new LinearLayout(Context) { Orientation = Orientation.Vertical };
+        layout.AddView(picker);
+        ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, true);
+        var builder = new AlertDialog.Builder(Context);
+        builder.SetView(layout);
+        if (!Element.IsSet(Picker.TitleColorProperty))
+        {
+            builder.SetTitle(model.Title ?? "");
+        }
+        else
+        {
+            var title = new SpannableString(model.Title ?? "");
+            title.SetSpan(new ForegroundColorSpan(model.TitleColor.ToAndroid()), 0, title.Length(), SpanTypes.ExclusiveExclusive);
+            builder.SetTitle(title);
+        }
+        builder.SetNegativeButton(global::Android.Resource.String.Cancel, (s, a) =>
+        {
+            ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
+            _dialog = null;
+        });
+        builder.SetPositiveButton(global::Android.Resource.String.Ok, (s, a) =>
+        {
+            ElementController.SetValueFromRenderer(Picker.SelectedIndexProperty, picker.Value);
+            // It is possible for the Content of the Page to be changed on SelectedIndexChanged.
+            // In this case, the Element & Control will no longer exist.
+            if (Element != null)
+            {
+                if (model.Items.Count > 0 && Element.SelectedIndex >= 0)
+                    Control.Text = model.Items[Element.SelectedIndex];
+                ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
+            }
+            _dialog = null;
+            // ★ここに何か実行したい処理を書く★
+        });
+        _dialog = builder.Create();
+        _dialog.DismissEvent += (sender, args) =>
+        {
+            ElementController?.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
+            _dialog?.Dispose();
+            _dialog = null;
+        };
+        _dialog.Show();
+    }
+    private void Control_FocusChange(object sender, FocusChangeEventArgs e)
+    {
-        if (e.Focus)
+        if (e.HasFocus)
         {
@@ -148,180 +344,6 @@
     }
-    protected override void Dispose(bool disposing)
-    {
-        if (disposing)
-        {
-            if (Control != null)
-            {
-                Control.Click -= Control_Click;
-            }
-        }
-        base.Dispose(disposing);
-    }
-    private void Control_Click(object sender, EventArgs e)
-    {
-        OnClick();
-    }
-    private void OnClick()
-    {
-        Picker model = Element;
-        if (_dialog != null)
-            return;
-        var picker = new NumberPicker(Context);
-        if (model.Items != null && model.Items.Any())
-        {
-            picker.MaxValue = model.Items.Count - 1;
-            picker.MinValue = 0;
-            picker.SetDisplayedValues(model.Items.ToArray());
-            picker.WrapSelectorWheel = false;
-            picker.DescendantFocusability = Android.Views.DescendantFocusability.BlockDescendants;
-            picker.Value = model.SelectedIndex;
-        }
-        var layout = new LinearLayout(Context) { Orientation = Orientation.Vertical };
-        layout.AddView(picker);
-        ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, true);
-        var builder = new AlertDialog.Builder(Context);
-        builder.SetView(layout);
-        if (!Element.IsSet(Picker.TitleColorProperty))
-        {
-            builder.SetTitle(model.Title ?? "");
-        }
-        else
-        {
-            var title = new SpannableString(model.Title ?? "");
-            title.SetSpan(new ForegroundColorSpan(model.TitleColor.ToAndroid()), 0, title.Length(), SpanTypes.ExclusiveExclusive);
-            builder.SetTitle(title);
-        }
-        builder.SetNegativeButton(global::Android.Resource.String.Cancel, (s, a) =>
-        {
-            ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
-            _dialog = null;
-        });
-        builder.SetPositiveButton(global::Android.Resource.String.Ok, (s, a) =>
-        {
-            ElementController.SetValueFromRenderer(Picker.SelectedIndexProperty, picker.Value);
-            // It is possible for the Content of the Page to be changed on SelectedIndexChanged.
-            // In this case, the Element & Control will no longer exist.
-            if (Element != null)
-            {
-                if (model.Items.Count > 0 && Element.SelectedIndex >= 0)
-                    Control.Text = model.Items[Element.SelectedIndex];
-                ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
-            }
-            _dialog = null;
-            // ★ここに何か実行したい処理を書く★
-        });
-        _dialog = builder.Create();
-        _dialog.DismissEvent += (sender, args) =>
-        {
-            ElementController?.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
-            _dialog?.Dispose();
-            _dialog = null;
-        };
-        _dialog.Show();
-    }
 }
 ```