Made wxCairo graphics code compile again, wxGraphicsBitmap still missing

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53347 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/graphics.h

@@ -196,6 +196,29 @@ public:
     instance, or indirectly using the static convenience CreateXXX functions of
     wxGraphicsContext that always delegate the task to the default renderer.
 
+    @code
+    void MyCanvas::OnPaint(wxPaintEvent &event)
+    {
+        // Create paint DC
+        wxPaintDC dc(this);
+        
+        // Create graphics context from it
+        wxGraphicsContext *gc = dc.CreateGraphicsContext();
+    
+        // make a path that contains a circle and some lines, centered at 100,100
+        wxGraphicsPath path = gc->CreatePath();
+        path.AddCircle( 0.0, 0.0, 100.0 );
+        path.MoveToPoint(0.0, -100.0);
+        path.AddLineToPoint(0.0, 100.0);
+        path.MoveToPoint(-100.0, 0.0);
+        path.AddLineToPoint(100.0, 0);
+        path.CloseSubpath();
+        path.AddRectangle(-50.0, -25.0, 100.0, 50.0);
+        
+        delete gc;
+    @endcode
+
+
     @library{wxcore}
     @category{FIXME}