clipping to empty if not visible

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54051 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/mac/carbon/dcclient.cpp b/src/mac/carbon/dcclient.cpp
index 0bd172fa844d878e4863ed3ed2ecfb3c477bb3ee..a7f4cb25369dd17cd2dccb79d8f3b11cf9b671a4 100644 (file)
--- a/src/mac/carbon/dcclient.cpp
+++ b/src/mac/carbon/dcclient.cpp
@@ -51,6 +51,8 @@ wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window )
     m_ok = true ;
 
     m_window->GetSize( &m_width , &m_height);
+    if ( !m_window->IsShownOnScreen() )
+        m_width = m_height = 0;
     CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
     m_release = false;
     if ( cg == NULL )
@@ -157,6 +159,8 @@ wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
     wxCHECK_RET( window, _T("invalid window in wxClientDCImpl") );
     wxPoint origin = window->GetClientAreaOrigin() ;
     m_window->GetClientSize( &m_width , &m_height);
+    if ( !m_window->IsShownOnScreen() )
+        m_width = m_height = 0;
     SetDeviceOrigin( origin.x, origin.y );
     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 }