modify ClickPoints.getClickPos function to detect click for square/pixel, not for triangle. (Checking if mouse is between two click points instead of if mouse is around one click point.)

temp-squares/fcore/app-update.sml

@@ -170,6 +170,17 @@ struct
         CollisionTree.toTriangles (windowWidth, windowHeight, squares, maxSide)
       val drawMsg = DRAW_SQUARES_AND_DOTS {squares = squares, dots = dotVec}
     in
-      (model, drawMsg)
+      (model, [drawMsg])
     end
+
+  fun mouseLeftClick model =
+    case ClickPoints.getClickPositionFromMouse model of
+      SOME (hIdx, vIdx) => addCoordinates (model, hIdx, vIdx)
+    | NONE => (model, [])
+
+  fun enterOrSpaceCoordinates model =
+    let val {arrowX, arrowY, ...} = model
+    in addCoordinates (model, arrowX, arrowY)
+    end
+
 end