fix the pressing/hovering/tooltip interaction

src/cascadia/TerminalApp/MinMaxCloseControl.cpp

@@ -148,6 +148,15 @@ namespace winrt::TerminalApp::implementation
     // - button: the button that was hovered
     void MinMaxCloseControl::HoverButton(CaptionButton button)
     {
+        // Keep track of the button that's been pressed. we get a mouse move
+        // message when we open the tooltip. If we move the mouse on top of this
+        // button, that we've already pressed, then no need to move to the
+        // "hovered" state, we should stay in the pressed state.
+        if (_lastPressedButton && _lastPressedButton.value() == button)
+        {
+            return;
+        }
+
         switch (button)
         {
         case CaptionButton::Minimize:
@@ -207,6 +216,7 @@ namespace winrt::TerminalApp::implementation
             VisualStateManager::GoToState(CloseButton(), L"Pressed", false);
             break;
         }
+        _lastPressedButton = button;
     }
 
     // Method Description:
@@ -222,5 +232,7 @@ namespace winrt::TerminalApp::implementation
         _closeToolTipForButton(MinimizeButton());
         _closeToolTipForButton(MaximizeButton());
         _closeToolTipForButton(CloseButton());
+
+        _lastPressedButton = std::nullopt;
     }
 }

src/cascadia/TerminalApp/MinMaxCloseControl.h

@@ -34,6 +34,7 @@ namespace winrt::TerminalApp::implementation
         TYPED_EVENT(CloseClick, TerminalApp::MinMaxCloseControl, winrt::Windows::UI::Xaml::RoutedEventArgs);
 
         std::shared_ptr<ThrottledFuncTrailing<winrt::Windows::UI::Xaml::Controls::Button>> _displayToolTip{ nullptr };
+        std::optional<CaptionButton> _lastPressedButton{ std::nullopt };
     };
 }
 

src/cascadia/TerminalApp/TitlebarControl.cpp

@@ -25,6 +25,8 @@ namespace winrt::TerminalApp::implementation
 
     double TitlebarControl::CaptionButtonWidth()
     {
+        // Divide by three, since we know there are only three buttons. When
+        // Windows 12 comes along and adds another, we can update this /s
         static double width{ MinMaxCloseControl().ActualWidth() / 3.0 };
         return width;
     }