B+: Check for nothing but spaces.. How?

Blitz3D Forums/Blitz3D Beginners Area/B+: Check for nothing but spaces.. How?

BachFire

(Posted 2003) [#1]

Hey,

I need to do a check on a TextField, to see if something was typed there or not. My program will not allow to use the TextField, if nothing visible is typed. That could be nothing typed at all, or a bunch of spaces.. I can't thing of a way to do this, other than this clumsy way:

Function CheckFor50spaces()
   If TextFieldText$(SiteNameField)=("") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=(" ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("  ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("   ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("    ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("     ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("      ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("       ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("        ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("         ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("          ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("           ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("            ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("             ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("              ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("               ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                 ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                  ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                   ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                    ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                     ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                      ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                       ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                        ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                         ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                          ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                           ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                            ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                             ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                              ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                               ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                 ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                  ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                   ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                    ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                     ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                      ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                       ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                        ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                         ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                          ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                           ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                            ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                             ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                              ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                               ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                                ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                                 ") Then Notify "You MUST give it a name!" : NoName=True : Return
   If TextFieldText$(SiteNameField)=("                                                  ") Then Notify "You MUST give it a name!" : NoName=True : Return
End Function

So far, I check up to 50 spaces. But if there are 51 spaces in the TextField, it will be allowed, and I don't want that!! Is there a way to check a TextField for nothing, OR ANY amount of spaces..?

Koriolis

(Posted 2003) [#2]

Isn't that what you want to do?

Function CheckForspaces()
    txt$=TextFieldText$(SiteNameField)
    ln% = Len(txt)
	For i = 1 To ln
		If Mid(txt, i, 1) <> " " Then
			NoName = False
			Return
		EndIf
	Next	
	Notify "You MUST give it a name!"
	NoName=True
End Function

(I have supposed NoName is a global variable.)

Or even simpler:

Function CheckForspaces()
    txt$=TextFieldText$(SiteNameField)
    NoName = (Trim(txt) = "")
    If NoName Then Notify "You MUST give it a name!"
End Function

GitTech

(Posted 2003) [#3]

Some example code:

a$="       "
b$=" asd "


If Trim$(a$)="" Then Print "a$ => Only spaces!"
If Trim$(b$)="" Then Print "b$ => Only spaces!"

EDIT: Ah, I wrote this when Koriolis updated his post :)

BachFire

(Posted 2003) [#4]

The magic command Trim..!! Right. Thanks a lot guys!! :)