Added error messages in grid function for invalid values for heights …

…and widths (#4902)

* add error messages in GridLayout to handle invalid values for heights and widths

* Used JuliaFormatter

src/layouts.jl

@@ -211,10 +211,28 @@ grid(args...; kw...) = GridLayout(args...; kw...)
 function GridLayout(
     dims...;
     parent = RootLayout(),
-    widths = zeros(dims[2]),
-    heights = zeros(dims[1]),
+    widths = nothing,
+    heights = nothing,
     kw...,
 )
+    # Check the values for heights and widths if values are provided
+    if heights !== nothing && widths !== nothing
+        if sum(heights) != 1
+            error("The sum of heights must be 1!")
+        end
+        if sum(widths) != 1
+            error("The sum of widths must be 1!")
+        end
+        if all(x -> 0 < x < 1, widths) == false
+            error("Values for widths must be in the range (0, 1)!")
+        end
+        if all(x -> 0 < x < 1, heights) == false
+            error("Values for heights must be in the range (0, 1)!")
+        end
+    else
+        heights = zeros(dims[1])
+        widths = zeros(dims[2])
+    end
     grid = Matrix{AbstractLayout}(undef, dims...)
     layout = GridLayout(
         parent,