Added a new abstract call for renderers to signal layout completion. Switch AppGraphics renderer to double-buffered for smooth display. Accelerated mouse wheel.

1 files changed, 8 insertions, 0 deletions

diff --git a/render.f90 b/render.f90
index 74b1406..9027f83 100644
--- a/render.f90
+++ b/render.f90
@@ -58,6 +58,7 @@ implicit none
         
         procedure(initialize), deferred::initialize
         procedure(prepare_for_layout), deferred::prepare_for_layout
+        procedure(layout_complete), deferred::layout_complete
         procedure(new_page), deferred::new_page
         
         procedure(calculate_width), deferred::text_width
@@ -107,6 +108,13 @@ implicit none
         class(renderer)::self
         end subroutine prepare_for_layout
     end interface
+    
+    abstract interface
+        subroutine layout_complete(self)
+        import::renderer
+        class(renderer)::self
+        end subroutine layout_complete
+    end interface
 
     abstract interface
         function calculate_width(self, text, text_type)