allow single choice menus (JuliaLang#19)

src/AbstractMenu.jl

@@ -10,7 +10,6 @@ doc string.
 # Functions
 
 The following functions can be called on all <:AbstractMenu types.
-Details can be found in
 
 ## Exported
 
@@ -262,8 +261,10 @@ function printMenu(out, m::AbstractMenu, cursor::Int; init::Bool=false)
 
         writeLine(buf, m, i, i == cursor, term_width)
 
-        # dont print an \r\n on the last line
-        i != (m.pagesize+m.pageoffset) && print(buf, "\r\n")
+        # don't print an \r\n on the last line unless there is only one line
+        if m.pagesize == 1 || i != (m.pagesize+m.pageoffset)
+            print(buf, "\r\n")
+        end
     end
 
     print(out, String(take!(buf)))

src/MultiSelectMenu.jl

@@ -47,14 +47,14 @@ were selected by the user.
   - `pagesize::Int=10`: The number of options to be displayed at one time, the menu will scroll if length(options) > pagesize
 """
 function MultiSelectMenu(options::Array{String,1}; pagesize::Int=10)
-    length(options) < 2 && error("MultiSelectMenu must have at least two options")
+    length(options) < 1 && error("MultiSelectMenu must have at least one option")
 
     # if pagesize is -1, use automatic paging
     pagesize = pagesize == -1 ? length(options) : pagesize
     # pagesize shouldn't be bigger than options
     pagesize = min(length(options), pagesize)
-    # after other checks, pagesize must be greater than 2
-    pagesize < 2 && error("pagesize must be >= 2")
+    # after other checks, pagesize must be greater than 1
+    pagesize < 1 && error("pagesize must be >= 1")
 
     pageoffset = 0
     selected = Set{Int}() # none

src/RadioMenu.jl

@@ -39,14 +39,14 @@ user.
   - `pagesize::Int=10`: The number of options to be displayed at one time, the menu will scroll if length(options) > pagesize
 """
 function RadioMenu(options::Array{String,1}; pagesize::Int=10)
-    length(options) < 2 && error("RadioMenu must have at least two options")
+    length(options) < 1 && error("RadioMenu must have at least one option")
 
     # if pagesize is -1, use automatic paging
     pagesize = pagesize == -1 ? length(options) : pagesize
     # pagesize shouldn't be bigger than options
     pagesize = min(length(options), pagesize)
-    # after other checks, pagesize must be greater than 2
-    pagesize < 2 && error("pagesize must be >= 2")
+    # after other checks, pagesize must be greater than 1
+    pagesize < 1 && error("pagesize must be >= 1")
 
     pageoffset = 0
     selected = -1 # none

test/multiselect_menu.jl

@@ -1,10 +1,6 @@
 # Check to make sure types are imported properly
 @test MultiSelectMenu <: TerminalMenus.AbstractMenu
 
-# Invalid Menu Params
-@test_throws ErrorException MultiSelectMenu(["one"])
-@test_throws ErrorException MultiSelectMenu(["one", "two", "three"], pagesize=1)
-
 # Constructor
 @test MultiSelectMenu(["one", "two", "three"]).pagesize == 3
 @test MultiSelectMenu(string.(1:30), pagesize=-1).pagesize == 30
@@ -34,3 +30,5 @@ TerminalMenus.writeLine(buf, multi_menu, 1, true, term_width)
 # Test SDTIN
 multi_menu = MultiSelectMenu(string.(1:10))
 @test simulateInput(Set([1,2]), multi_menu, :enter, :enter, 'd')
+multi_menu = MultiSelectMenu(["single option"])
+@test simulateInput(Set([1]), multi_menu, :up, :up, :down, :enter, 'd')

test/radio_menu.jl

@@ -1,10 +1,6 @@
 # Check to make sure types are imported properly
 @test RadioMenu <: TerminalMenus.AbstractMenu
 
-# Invalid Menu Params
-@test_throws ErrorException RadioMenu(["one"])
-@test_throws ErrorException RadioMenu(["one", "two", "three"], pagesize=1)
-
 # Constructor
 @test RadioMenu(["one", "two", "three"]).pagesize == 3
 @test RadioMenu(string.(1:30), pagesize=-1).pagesize == 30
@@ -38,3 +34,7 @@ TerminalMenus.writeLine(buf, radio_menu, 1, true, term_width)
 # Test using STDIN
 radio_menu = RadioMenu(string.(1:10))
 @test simulateInput(3, radio_menu, :down, :down, :enter)
+radio_menu = RadioMenu(["single option"])
+@test simulateInput(1, radio_menu, :up, :up, :down, :up, :enter)
+radio_menu = RadioMenu(string.(1:3), pagesize=1)
+@test simulateInput(3, radio_menu, :down, :down, :down, :down, :enter)