Display help string for ribbon tools in a tool tip.

Show the help string of the ribbon item currently being hovered over in a
tooltip.

Closes #11879.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70175 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -459,6 +459,7 @@ All (GUI):
   wxDataViewCtrl (Andrew Xu).
 - Fix item alignment in icon view in the generic wxListCtrl.
 - Support font-family/style, text-decoration in wxHtmlWindow (Blake Oleander).
+- Show ribbon tools help strings in tooltips (John Roberts).
 
 GTK:
 

src/ribbon/buttonbar.cpp

@@ -875,6 +875,11 @@ void wxRibbonButtonBar::OnMouseMove(wxMouseEvent& evt)
         }
     }
 
+    if(new_hovered == NULL && GetToolTip())
+    {
+        UnsetToolTip();
+    }
+
     if(new_hovered != m_hovered_button || (m_hovered_button != NULL &&
         new_hovered_state != m_hovered_button->base->state))
     {
@@ -886,6 +891,7 @@ void wxRibbonButtonBar::OnMouseMove(wxMouseEvent& evt)
         if(m_hovered_button != NULL)
         {
             m_hovered_button->base->state = new_hovered_state;
+            SetToolTip(m_hovered_button->base->help_string);
         }
         Refresh(false);
     }

src/ribbon/toolbar.cpp

@@ -581,6 +581,15 @@ void wxRibbonToolBar::OnMouseMove(wxMouseEvent& evt)
         }
     }
 
+    if(new_hover)
+    {
+        SetToolTip(new_hover->help_string);
+    }
+    else if(GetToolTip())
+    {
+        UnsetToolTip();
+    }
+
     if(new_hover != m_hover_tool)
     {
         if(m_hover_tool)