Clarified some sections.

docs/data/diagrams.tex

@@ -309,39 +309,42 @@
     \begin{figure}[h!]
         \center
         \architecture{
+            \tikzstyle{area} = [block, fill=gray!15];
+            \tikzstyle{tracker} = [block, draw=gray!50];
+
             \node[block, below of=driver] (eventdriver) {Event driver}
                 edge[linefrom] node[right, near end] {device-specific messages} (driver);
 
-            \node[block, below of=eventdriver] (rootarea) {Screen area}
+            \node[area, below of=eventdriver] (rootarea) {Screen area}
                 edge[linefrom] (eventdriver);
 
-            \node[block, below of=rootarea, xshift=-5em] (appwindow) {Application window area}
+            \node[area, below of=rootarea, xshift=-5em] (appwindow) {Application window area}
                 edge[lineto, <->] (rootarea);
-            \node[block, left of=appwindow, xshift=-4em, text width=7em] {Transformation tracker}
+            \node[tracker, left of=appwindow, xshift=-4em, text width=7em] {Transformation tracker}
                 edge[lineto, dotted, bend right=10] (appwindow)
                 edge[linefrom, bend left=10] (appwindow);
 
-            \node[block, below of=rootarea, xshift=5em] (overlay) {Overlay area}
+            \node[area, below of=rootarea, xshift=5em] (overlay) {Overlay area}
                 edge[lineto, <->] (rootarea);
-            \node[block, right of=overlay, xshift=4em] (tracker) {Hand tracker}
+            \node[tracker, right of=overlay, xshift=4em] (tracker) {Hand tracker}
                 edge[lineto, dotted, bend left=10] (overlay)
                 edge[linefrom, bend right=10] (overlay);
 
-            \node[block, below of=appwindow, xshift=-5em] (rectangle) {Rectangle area}
+            \node[area, below of=appwindow, xshift=-5em] (rectangle) {Rectangle area}
                 edge[lineto, <->] (appwindow);
-            \node[block, left of=rectangle, xshift=-4em, yshift=2em, text width=7em] (recttracker) {Transformation tracker}
+            \node[tracker, left of=rectangle, xshift=-4em, yshift=2em, text width=7em] (recttracker) {Transformation tracker}
                 edge[lineto, dotted, bend left=10] (rectangle)
                 edge[linefrom, bend right=10] (rectangle);
-            \node[block, left of=rectangle, xshift=-4em, yshift=-2em, text width=7em] {Tap tracker}
+            \node[tracker, left of=rectangle, xshift=-4em, yshift=-2em, text width=7em] {Tap tracker}
                 edge[lineto, dotted, bend right=10] (rectangle)
                 edge[linefrom, bend left=10] (rectangle);
 
-            \node[block, below of=appwindow, xshift=5em] (triangle) {Triangle area}
+            \node[area, below of=appwindow, xshift=5em] (triangle) {Triangle area}
                 edge[lineto, <->] (appwindow);
-            \node[block, right of=triangle, xshift=4em, yshift=2em, text width=7em] {Transformation tracker}
+            \node[tracker, right of=triangle, xshift=4em, yshift=2em, text width=7em] {Transformation tracker}
                 edge[lineto, dotted, bend right=10] (triangle)
                 edge[linefrom, bend left=10] (triangle);
-            \node[block, right of=triangle, xshift=4em, yshift=-2em, text width=7em] (taptracker) {Tap tracker}
+            \node[tracker, right of=triangle, xshift=4em, yshift=-2em, text width=7em] (taptracker) {Tap tracker}
                 edge[lineto, dotted, bend left=10] (triangle)
                 edge[linefrom, bend right=10] (triangle);
 
@@ -353,14 +356,16 @@
 
             \group{recttracker}{eventdriver}{tracker}{taptracker}{Architecture}
         }
-        \caption{Diagram representation of the second test application. A full
+        \caption{
+            Diagram representation of the second test application. A full
             screen event area contains an application window and a full screen
-        overlay. The application window contains a rectangle and a triangle.
-        the application window and its children can be transformed, and thus
-        each have ``transformation tracker''. The rectangle and triangle also
-        have a ``tap tracker'' that detects double tap gestures. Dotted arrows
-        represent a flow of gestures, regular arrows represent events (unless
-        labeled otherwise).}
+            overlay. The application window contains a rectangle and a
+            triangle.  the application window and its children can be
+            transformed, and thus each have ``transformation tracker''. The
+            rectangle and triangle also have a ``tap tracker'' that detects
+            double tap gestures. Dotted arrows represent a flow of gestures,
+            regular arrows represent events (unless labeled otherwise).
+        }
         \label{fig:testappdiagram}
     \end{figure}
 }