diff --git a/extra/automata/ui/ui.factor b/extra/automata/ui/ui.factor
index cfb0462877..037cf41118 100644
--- a/extra/automata/ui/ui.factor
+++ b/extra/automata/ui/ui.factor
@@ -30,7 +30,7 @@ IN: automata.ui
 
 : draw-bitmap ( bitmap -- ) GL_POINTS glBegin (draw-bitmap) glEnd ;
 
-: display ( -- ) black gl-color bitmap> draw-bitmap ;
+: display ( -- ) black set-color bitmap> draw-bitmap ;
 
 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
diff --git a/extra/golden-section/golden-section.factor b/extra/golden-section/golden-section.factor
index 807ef1355a..05e7f68d0a 100644
--- a/extra/golden-section/golden-section.factor
+++ b/extra/golden-section/golden-section.factor
@@ -2,7 +2,7 @@
 USING: kernel namespaces math math.constants math.functions math.order
        arrays sequences
        opengl opengl.gl opengl.glu ui ui.render ui.gadgets ui.gadgets.theme
-       ui.gadgets.slate colors accessors combinators.cleave
+       ui.gadgets.cartesian colors accessors combinators.cleave
        processing.shapes ;
 
 IN: golden-section
@@ -39,20 +39,17 @@ IN: golden-section
 
 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
-: display ( -- )
-  GL_PROJECTION glMatrixMode
-  glLoadIdentity
-  -400 400 -400 400 -1 1 glOrtho
-  GL_MODELVIEW glMatrixMode
-  glLoadIdentity
-  golden-section ;
-
 : golden-section-window ( -- )
     [
-      [ display ] <slate>
-        { 600 600 } >>pdim
+      <cartesian>
+        {  600 600 }       >>pdim
+        { -400 400 }       x-range
+        { -400 400 }       y-range
+        [ golden-section ] >>action
       "Golden Section" open-window
     ]
   with-ui ;
 
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
 MAIN: golden-section-window
diff --git a/extra/slides/slides.factor b/extra/slides/slides.factor
index c3c105143e..05aa6779f5 100755
--- a/extra/slides/slides.factor
+++ b/extra/slides/slides.factor
@@ -3,7 +3,7 @@
 USING: arrays hashtables help.markup help.stylesheet io
 io.styles kernel math models namespaces sequences ui ui.gadgets
 ui.gadgets.books ui.gadgets.panes ui.gestures ui.render
-parser accessors ;
+parser accessors colors ;
 IN: slides
 
 : stylesheet
diff --git a/extra/ui/gadgets/cartesian/cartesian.factor b/extra/ui/gadgets/cartesian/cartesian.factor
new file mode 100644
index 0000000000..027c1061a8
--- /dev/null
+++ b/extra/ui/gadgets/cartesian/cartesian.factor
@@ -0,0 +1,47 @@
+
+USING: kernel combinators sequences opengl.gl
+       ui.render ui.gadgets ui.gadgets.slate
+       accessors ;
+
+IN: ui.gadgets.cartesian
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+TUPLE: cartesian < slate x-min x-max y-min y-max z-min z-max perspective ;
+
+: init-cartesian ( cartesian -- cartesian )
+  init-slate
+  -10 >>x-min
+   10 >>x-max
+  -10 >>y-min
+   10 >>y-max
+   -1 >>z-min
+    1 >>z-max ;
+
+: <cartesian> ( -- cartesian ) cartesian new init-cartesian ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+M: cartesian draw-gadget* ( cartesian -- )
+   GL_PROJECTION glMatrixMode
+   glLoadIdentity
+   dup
+       {
+         [ x-min>> ] [ x-max>> ]
+         [ y-min>> ] [ y-max>> ]
+         [ z-min>> ] [ z-max>> ]
+       }
+     cleave
+     glOrtho
+   GL_MODELVIEW glMatrixMode
+   glLoadIdentity
+   call-next-method ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: x-range ( cartesian range -- cartesian ) first2 [ >>x-min ] [ >>x-max ] bi* ;
+: y-range ( cartesian range -- cartesian ) first2 [ >>y-min ] [ >>y-max ] bi* ;
+: z-range ( cartesian range -- cartesian ) first2 [ >>z-min ] [ >>z-max ] bi* ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
diff --git a/extra/ui/gadgets/slate/slate.factor b/extra/ui/gadgets/slate/slate.factor
index 2ef740e580..05b2de2e06 100644
--- a/extra/ui/gadgets/slate/slate.factor
+++ b/extra/ui/gadgets/slate/slate.factor
@@ -5,12 +5,19 @@ IN: ui.gadgets.slate
 
 TUPLE: slate < gadget action pdim graft ungraft ;
 
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: init-slate ( slate -- slate )
+  init-gadget
+  [ ]         >>action
+  { 200 200 } >>pdim
+  [ ]         >>graft
+  [ ]         >>ungraft ;
+
 : <slate> ( action -- slate )
-  slate new-gadget
-    swap        >>action
-    { 100 100 } >>pdim
-    [ ]         >>graft
-    [ ]         >>ungraft ;
+  slate new
+    init-slate
+    swap >>action ;
 
 M: slate pref-dim* ( slate -- dim ) pdim>> ;