added wxDisplay::GetClientArea() (currently implemented for single display and MSW implementations only)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38147 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/display.cpp

@@ -142,6 +142,9 @@ struct wxDisplayInfo
     // the entire area of this monitor in virtual screen coordinates
     wxRect m_rect;
 
+    // the work or client area, i.e. the area available for the normal windows
+    wxRect m_rectClient;
+
     // the display device name for this monitor, empty initially and retrieved
     // on demand by DoGetName()
     wxString m_devName;
@@ -167,6 +170,7 @@ public:
     }
 
     virtual wxRect GetGeometry() const;
+    virtual wxRect GetClientArea() const;
     virtual wxString GetName() const;
     virtual bool IsPrimary() const;
 
@@ -415,6 +419,7 @@ void wxDisplayInfo::Initialize()
         }
 
         wxCopyRECTToRect(monInfo.rcMonitor, m_rect);
+        wxCopyRECTToRect(monInfo.rcWork, m_rectClient);
         m_devName = monInfo.szDevice;
         m_flags = monInfo.dwFlags;
     }
@@ -432,6 +437,14 @@ wxRect wxDisplayImplWin32Base::GetGeometry() const
     return m_info.m_rect;
 }
 
+wxRect wxDisplayImplWin32Base::GetClientArea() const
+{
+    if ( m_info.m_rectClient.IsEmpty() )
+        m_info.Initialize();
+
+    return m_info.m_rectClient;
+}
+
 wxString wxDisplayImplWin32Base::GetName() const
 {
     if ( m_info.m_devName.IsEmpty() )