gtk2: toggle menubar mnemonics on if any keyinput on it or submenus

this is closer to how I seem to see the gtk menubars work

(gtk3 is native now so this doesn't affect that)

Change-Id: Ie5225d2ccda698946f26408aae95d2a50cbb928b

vcl/source/window/menubarwindow.cxx

@@ -671,10 +671,10 @@ void MenuBarWindow::KeyInput( const KeyEvent& rKEvent )
 
 bool MenuBarWindow::HandleKeyEvent( const KeyEvent& rKEvent, bool bFromMenu )
 {
-    if( ! pMenu )
+    if (!pMenu)
         return false;
 
-    if ( pMenu->bInCallback )
+    if (pMenu->bInCallback)
         return true;    // swallow
 
     bool bDone = false;
@@ -808,6 +808,8 @@ bool MenuBarWindow::HandleKeyEvent( const KeyEvent& rKEvent, bool bFromMenu )
     }
 
     bool accel = ImplGetSVData()->maNWFData.mbEnableAccel;
+    bool autoacc = ImplGetSVData()->maNWFData.mbAutoAccel;
+
     if ( !bDone && ( bFromMenu || (rKEvent.GetKeyCode().IsMod2() && accel) ) )
     {
         sal_Unicode nCharCode = rKEvent.GetCharCode();
@@ -818,14 +820,21 @@ bool MenuBarWindow::HandleKeyEvent( const KeyEvent& rKEvent, bool bFromMenu )
             if ( pData && (nEntry != ITEMPOS_INVALID) )
             {
                 mbAutoPopup = true;
-                SetMBWMenuKey(true);
-                SetMBWHideAccel(true);
-                Invalidate(InvalidateFlags::Update);
                 ChangeHighlightItem( nEntry, true );
                 bDone = true;
             }
         }
     }
+
+    const bool bShowAccels = nCode != KEY_ESCAPE;
+    if (GetMBWMenuKey() != bShowAccels)
+    {
+        SetMBWMenuKey(bShowAccels);
+        SetMBWHideAccel(!bShowAccels);
+        if (accel && autoacc)
+            Invalidate(InvalidateFlags::Update);
+    }
+
     return bDone;
 }
 

vcl/source/window/menufloatingwindow.cxx

@@ -976,6 +976,8 @@ void MenuFloatingWindow::KeyInput( const KeyEvent& rKEvent )
 {
     VclPtr<vcl::Window> xWindow = this;
 
+    bool accel = ImplGetSVData()->maNWFData.mbEnableAccel;
+    bool autoacc = ImplGetSVData()->maNWFData.mbAutoAccel;
     sal_uInt16 nCode = rKEvent.GetKeyCode().GetCode();
     bKeyInput = true;
     switch ( nCode )
@@ -1102,7 +1104,7 @@ void MenuFloatingWindow::KeyInput( const KeyEvent& rKEvent )
             sal_Unicode nCharCode = rKEvent.GetCharCode();
             sal_uInt16 nPos = 0;
             sal_uInt16 nDuplicates = 0;
-            MenuItemData* pData = (nCharCode && pMenu) ?
+            MenuItemData* pData = (nCharCode && pMenu && accel) ?
                 pMenu->GetItemList()->SearchItem(nCharCode, rKEvent.GetKeyCode(), nPos, nDuplicates, nHighlightedItem) : nullptr;
             if (pData)
             {
@@ -1121,6 +1123,20 @@ void MenuFloatingWindow::KeyInput( const KeyEvent& rKEvent )
                 FloatingWindow::KeyInput( rKEvent );
         }
     }
+
+    if (pMenu && pMenu->pStartedFrom && pMenu->pStartedFrom->IsMenuBar())
+    {
+        MenuBar *pMenuBar = static_cast<MenuBar*>(pMenu->pStartedFrom.get());
+        const bool bShowAccels = nCode != KEY_ESCAPE;
+        if (pMenuBar->getMenuBarWindow()->GetMBWMenuKey() != bShowAccels)
+        {
+            pMenuBar->getMenuBarWindow()->SetMBWMenuKey(bShowAccels);
+            pMenuBar->getMenuBarWindow()->SetMBWHideAccel(!bShowAccels);
+            if (accel && autoacc)
+                Invalidate(InvalidateFlags::Update);
+        }
+    }
+
     // #105474# check if menu window was not destroyed
     if ( !xWindow->IsDisposed() )
     {