fix bugs relating to resizing canvas width

fcore/app-with.sml

@@ -11,18 +11,21 @@ struct
            el) squares
 
   fun changeSquaresSize (squares, newCanvasWidth, newCanvasHeight) =
-    Vector.tabulate (newCanvasWidth + 1, fn i =>
-      if i < Vector.length squares then
-        Vector.tabulate (newCanvasHeight + 1, fn ii =>
+    let
+      val maxPoints = Int.max (newCanvasWidth, newCanvasHeight)
+    in
+      Vector.tabulate (maxPoints, fn i =>
+        if i < Vector.length squares then
           let
             val yAxis = Vector.sub (squares, i)
           in
-            if ii < Vector.length yAxis then Vector.sub (yAxis, ii)
-            else {r = 0, g = 0, b = 0, a = 0}
-          end)
-      else
-        Vector.tabulate (newCanvasHeight + 1, fn _ =>
-          {r = 0, g = 0, b = 0, a = 0}))
+            Vector.tabulate (maxPoints, fn ii =>
+              if ii < Vector.length yAxis then Vector.sub (yAxis, ii)
+              else {r = 0, g = 0, b = 0, a = 0})
+          end
+        else
+          Vector.tabulate (maxPoints, fn _ => {r = 0, g = 0, b = 0, a = 0}))
+    end
 
   fun addSquare (app, newX, newY, arrowX, arrowY) : app_type =
     let
@@ -861,6 +864,9 @@ struct
 
       val squares = changeSquaresSize (squares, newCanvasWidth, canvasHeight)
       val arrowX = Int.min (arrowX, newCanvasWidth)
+      val (xClickPoints, yClickPoints) =
+        ClickPoints.generate
+          (windowWidth, windowHeight, newCanvasWidth, canvasHeight)
     in
       { mode = mode
       , canvasWidth = newCanvasWidth