Apply dark mode to the tooltips of the native controls using them

Override the newly added MSWGetToolTipMessage() in the controls using
tooltips and apply dark mode to the window returned by this message too
to make sure they appear correctly in dark mode.

include/wx/msw/control.h

@@ -134,6 +134,11 @@ protected:
     // disables the use of "Explorer" theme by default.
     virtual const wchar_t* MSWGetDarkThemeId() const { return nullptr; }
 
+    // Return the message that can be used to retrieve the tooltip window used
+    // by a native control. If this message is non-zero and sending it returns
+    // a valid HWND, the dark theme is also applied to it, if appropriate.
+    virtual int MSWGetToolTipMessage() const { return 0; }
+
 
     // for controls like radiobuttons which are really composite this array
     // holds the ids (not HWNDs!) of the sub controls

include/wx/msw/listctrl.h

@@ -400,6 +400,8 @@ protected:
 
     virtual const wchar_t* MSWGetDarkThemeName() const override;
 
+    virtual int MSWGetToolTipMessage() const override;
+
     void OnDPIChanged(wxDPIChangedEvent& event);
 
     wxSize MSWGetBestViewRect(int x, int y) const;

include/wx/msw/notebook.h

@@ -141,6 +141,8 @@ protected:
   // common part of all ctors
   void Init();
 
+  virtual int MSWGetToolTipMessage() const override;
+
   // hides the currently shown page and shows the given one (if not -1) and
   // updates m_selection accordingly
   void UpdateSelection(int selNew);

include/wx/msw/toolbar.h

@@ -101,6 +101,8 @@ protected:
     // common part of all ctors
     void Init();
 
+    virtual int MSWGetToolTipMessage() const override;
+
     // create the native toolbar control
     bool MSWCreateToolbar(const wxPoint& pos, const wxSize& size);
 

include/wx/msw/treectrl.h

@@ -212,6 +212,8 @@ protected:
 
     virtual bool MSWShouldSetDefaultFont() const override { return false; }
 
+    virtual int MSWGetToolTipMessage() const override;
+
     virtual void OnImagesChanged() override;
 
     // SetImageList helper

src/msw/control.cpp

@@ -138,9 +138,19 @@ bool wxControl::MSWCreateControl(const wxChar *classname,
         return false;
     }
 
-    wxMSWDarkMode::AllowForWindow(m_hWnd,
-                                  MSWGetDarkThemeName(),
-                                  MSWGetDarkThemeId());
+    if ( wxMSWDarkMode::IsActive() )
+    {
+        wxMSWDarkMode::AllowForWindow(m_hWnd,
+                                      MSWGetDarkThemeName(),
+                                      MSWGetDarkThemeId());
+
+        if ( const int msgTT = MSWGetToolTipMessage() )
+        {
+            const HWND hwndTT = (HWND)::SendMessage(GetHwnd(), msgTT, 0, 0);
+            if ( ::IsWindow(hwndTT) )
+                wxMSWDarkMode::AllowForWindow(hwndTT);
+        }
+    }
 
     // saving the label in m_labelOrig to return it verbatim
     // later in GetLabel()

src/msw/listctrl.cpp

@@ -694,6 +694,11 @@ const wchar_t* wxListCtrl::MSWGetDarkThemeName() const
     return L"ItemsView";
 }
 
+int wxListCtrl::MSWGetToolTipMessage() const
+{
+    return LVM_GETTOOLTIPS;
+}
+
 wxVisualAttributes wxListCtrl::GetDefaultAttributes() const
 {
     wxVisualAttributes attrs = GetClassDefaultAttributes(GetWindowVariant());

src/msw/notebook.cpp

@@ -281,6 +281,11 @@ WXDWORD wxNotebook::MSWGetStyle(long style, WXDWORD *exstyle) const
     return tabStyle;
 }
 
+int wxNotebook::MSWGetToolTipMessage() const
+{
+    return TCM_GETTOOLTIPS;
+}
+
 wxNotebook::~wxNotebook()
 {
 #if wxUSE_UXTHEME

src/msw/toolbar.cpp

@@ -714,6 +714,11 @@ WXDWORD wxToolBar::MSWGetStyle(long style, WXDWORD *exstyle) const
     return msStyle;
 }
 
+int wxToolBar::MSWGetToolTipMessage() const
+{
+    return TB_GETTOOLTIPS;
+}
+
 // ----------------------------------------------------------------------------
 // adding/removing tools
 // ----------------------------------------------------------------------------

src/msw/treectrl.cpp

@@ -2208,6 +2208,11 @@ void wxTreeCtrl::SortChildren(const wxTreeItemId& item)
 // implementation
 // ----------------------------------------------------------------------------
 
+int wxTreeCtrl::MSWGetToolTipMessage() const
+{
+    return TVM_GETTOOLTIPS;
+}
+
 bool wxTreeCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
 {
     if ( msg->message == WM_KEYDOWN )