Use focus events to trigger

Author: Jack251970

Flow.Launcher/MainWindow.xaml

@@ -242,6 +242,8 @@
                             InputMethod.PreferredImeState="{Binding StartWithEnglishMode, Converter={StaticResource BoolToIMEStateConverter}}"
                             PreviewDragOver="QueryTextBox_OnPreviewDragOver"
                             PreviewKeyUp="QueryTextBox_KeyUp"
+                            GotKeyboardFocus="QueryTextBox_OnGotKeyboardFocus"
+                            PreviewLostKeyboardFocus="QueryTextBox_OnPreviewLostKeyboardFocus"
                             Style="{DynamicResource QueryBoxStyle}"
                             Text="{Binding QueryText, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                             Visibility="Visible"

Flow.Launcher/MainWindow.xaml.cs

@@ -989,6 +989,22 @@ private void QueryTextBox_OnPreviewDragOver(object sender, DragEventArgs e)
             e.Handled = true;
         }
 
+        private void QueryTextBox_OnGotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
+        {
+            if (_viewModel.StartWithEnglishMode)
+            {
+                Win32Helper.SwitchToEnglishKeyboardLayout(true);
+            }
+        }
+
+        private void QueryTextBox_OnPreviewLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
+        {
+            if (_viewModel.StartWithEnglishMode)
+            {
+                Win32Helper.RestorePreviousKeyboardLayout();
+            }
+        }
+
         #endregion
     }
 }

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -1373,11 +1373,6 @@ public void Show()
                 MainWindowOpacity = 1;
                 MainWindowVisibilityStatus = true;
                 VisibilityChanged?.Invoke(this, new VisibilityChangedEventArgs { IsVisible = true });
-
-                if (StartWithEnglishMode)
-                {
-                    Win32Helper.SwitchToEnglishKeyboardLayout(true);
-                }
             });
         }
 
@@ -1447,11 +1442,6 @@ public async void Hide()
                 Win32Helper.DWMSetCloakForWindow(mainWindow, true);
             }
 
-            if (StartWithEnglishMode)
-            {
-                Win32Helper.RestorePreviousKeyboardLayout();
-            }
-
             await Task.Delay(50);
 
             // Update WPF properties