dim-layer.rb

dim-layer.rb

# Switches the active Layer to "DIMS" when DimensionTool is used.
# Puts all Dimensions on DIMS Layer.

module JF
   module DimLayer

      DIM_LAYER_NAME = "DIMS"

      class AppObserver < Sketchup::AppObserver
        def expectsStartupNotifications()
          true
        end

        def onNewModel(model)
          model.tools.add_observer(JF::DimLayer::ToolsObserver.new)
        end
        def onOpenModel(model)
          model.tools.add_observer(JF::DimLayer::ToolsObserver.new)
        end
      end

      class ToolsObserver < Sketchup::ToolsObserver
         @@layers = []

         def onActiveToolChanged(tools, tool_name, tool_id)
            if tool_name == "DimensionTool"
               @@layers << Sketchup.active_model.active_layer
               dim_layer = Sketchup.active_model.layers.add(DIM_LAYER_NAME)
               Sketchup.active_model.active_layer = dim_layer
               Sketchup.vcb_label = "Switched to Layer #{DIM_LAYER_NAME}"
            else
               if @@layers.size > 0
                  Sketchup.active_model.active_layer = @@layers.pop
               end
            end
         end

      end

   end # DimLayer
end # JF

Sketchup.active_model.tools.add_observer(JF::DimLayer::ToolsObserver.new)
Sketchup.add_observer(JF::DimLayer::AppObserver.new)