Can you have if statements in with GUI buttons?

[Jesse.A]

What is it you are trying to achieve?
I am trying to use if statements with buttons.

What is the problem you are having?
I realy have no idea how i would go about doing it.


Describe what you have tried to solve this problem
I have messed around a little bit but nothing seems to be working.


Post any relevant code (You may choose to attach the file instead of posting the code if it is too long)

Turing:

import GUI var button1, button2, button3 : int var x : string forward procedure display procedure menu     button1 := GUI.CreateButton (150, 200, 0, "Button1", display)     button2 := GUI.CreateButton (250, 200, 0, "Button2", display)     button3 := GUI.CreateButton (350, 200, 0, "Quit", GUI.Quit)         loop     if button1 = 1 and GUI.ProcessEvent then     x := "1"     exit     elsif button2 = 1 and GUI.ProcessEvent then         x := "2"         end if         end loop end menu body procedure display          put "You pressed button" +x end display %main menu display

Please specify what version of Turing you are using
4.1.1

[Insectoid]

Instead of using an if statement, have your display procedure take x as a parameter and pass it on your button lines.

code:

button1 := GUI.CreatButton (150, 200, 0, "Button1", display(1))

[Zren]

Insectoid @ Sun May 25, 2014 4:01 pm wrote:

Instead of using an if statement, have your display procedure take x as a parameter and pass it on your button lines.

code:

button1 := GUI.CreatButton (150, 200, 0, "Button1", display(1))

That doesn't work. Turing doesn't support lambdas, so you can't make simple callbacks like that.

[Tony]

That's not lambda (in a way of anonymous function definition). The display is assumed to be already defined, and here it's referenced with an argument. I'm pretty sure that this works, although in a non-documented way.

Oddly enough, there's GUI.GetEventWidgetID, which could be used to distinguish between different widgets calling the same procedure.

[Jesse.A]

Thank you very much!

[Zren]

Tony @ Mon May 26, 2014 2:31 am wrote:

That's not lambda (in a way of anonymous function definition). The display is assumed to be already defined, and here it's referenced with an argument. I'm pretty sure that this works, although in a non-documented way.

Oddly enough, there's GUI.GetEventWidgetID, which could be used to distinguish between different widgets calling the same procedure.

So wait, calling a procedure with arguments returns a value? That value being a new procedure without parameters? What version of Turing supports this?

[Tony]

I don't remember this well, you might be right -- an argumented procedure might been to return a procedure without parameters. Turing does support procedures as types -- see subprogramType