PureBasic Forums - English

Posted: **Wed Aug 05, 2020 6:43 am**

Hi All. I was taking a python course(slow interpreted language), and I thought I would convert some of the exercises to speedy executable PureBasic code just to see how easy it would be. So I started with a simple guess your number program in a window. What was trivial in the console was far more complicated for me in a window. I've always struggled with event driven programming, but I've committed to learning much more about it. My first problem is having two event loops, I've heard you should always try to have only one event loop in your program, but then I can't exit gracefully from the program. I thought of just having a timer delay after the program is over, with AddWindowTimer or like a hit any key to end the program, but the way I did it with shortcuts to the window would entail me to put in every key on the keyboard as shortcuts. I thought of Examine_Keyboard and Keyboard_inkey, but in the help it seems these are more for game applications. Of course that may not be the case. Any help to point me in the right direction would be appreciated.

Code: Select all

high = 101
low = 0
guess = 50
guessed = #False
x=0
Window_0 = OpenWindow(#PB_Any, 0, 0, 800, 600, "I Guess Number",#PB_Window_SystemMenu | #PB_Window_SizeGadget | #PB_Window_ScreenCentered)
If IsWindow(Window_0) 
     AddKeyboardShortcut(Window_0,#PB_Shortcut_C ,1) 
     AddKeyboardShortcut(Window_0,#PB_Shortcut_L ,2)
     AddKeyboardShortcut(Window_0,#PB_Shortcut_H ,3)
     AddKeyboardShortcut(Window_0,#PB_Shortcut_Escape ,4)
     Editor_0 = EditorGadget(#PB_Any, 0,0,800,600)
     Font2 = LoadFont(#PB_Any, "Verdana", 12)
     SetGadgetFont(Editor_0, FontID(Font2))
     
     AddGadgetItem(Editor_0, -1, "Please think of a number between 0 and 100!")
     AddGadgetItem(Editor_0, -1, "Enter 'h' To indicate high guess, 'l' To indicate low guess, " + #LF$ + "And 'c' To indicate correct guess.")
     
     While Not guessed
          guess = (high + low) / 2
          
          AddGadgetItem(Editor_0, -1, "Is your secret number " + Str(guess) + "?")
          
          
          Repeat             
               Event = WaitWindowEvent() 
               If Event = #PB_Event_CloseWindow  ; If the user has pressed on the close button
                    End
               EndIf
               
               MenuID = EventMenu() 
               Select Event 
                    Case #PB_Event_Menu 
                         Select MenuID 
                              Case 1 
                                   AddGadgetItem(Editor_0, -1, "Game over. Your secret number was " + Str(guess))
                                   guessed = #True
                                   Break
                              Case 2
                                   low = guess
                                   Break
                              Case 3
                                   high = guess
                                   Break
                              Case 4
                                   End
                                   
                         EndSelect 
                         
                         
               EndSelect 
               
          ForEver
          
          
     Wend
     
     
     Repeat
          Event = WaitWindowEvent() 
          
          MenuID = EventMenu() 
          Select Event 
               Case #PB_Event_Menu 
                    Select MenuID 
                         Case 4
                              End
                    EndSelect 
          EndSelect 
          
          
          
     Until Event = #PB_Event_CloseWindow
     
Else
     MessageRequester("Error","Could Not Open Window")
     End
EndIf

Posted: **Wed Aug 05, 2020 7:00 am**

Code: Select all

EnableExplicit

Enumeration
  #LowGuess
  #HighGuess
  #CorrectGuess
  #Escape
EndEnumeration


Define.i high, low, guess, guessed, Window_0, Editor_0, Font2, Event, MenuID

high = 101
low = 0
guess = 50
guessed = #False

Window_0 = OpenWindow(#PB_Any, 0, 0, 800, 600, "I Guess Number",#PB_Window_SystemMenu | #PB_Window_SizeGadget | #PB_Window_ScreenCentered)
If IsWindow(Window_0)
  
  AddKeyboardShortcut(Window_0,#PB_Shortcut_C ,#CorrectGuess)
  AddKeyboardShortcut(Window_0,#PB_Shortcut_L ,#LowGuess)
  AddKeyboardShortcut(Window_0,#PB_Shortcut_H ,#HighGuess)
  AddKeyboardShortcut(Window_0,#PB_Shortcut_Escape ,#Escape)
  Editor_0 = EditorGadget(#PB_Any, 0,0,800,600)
  Font2 = LoadFont(#PB_Any, "Verdana", 12)
  SetGadgetFont(Editor_0, FontID(Font2))
  
  AddGadgetItem(Editor_0, -1, "Please think of a number between 0 and 100!")
  AddGadgetItem(Editor_0, -1, "Enter 'h' To indicate high guess, 'l' To indicate low guess, " + #LF$ + "And 'c' To indicate correct guess.")
  
  AddGadgetItem(Editor_0, -1, "Is your secret number " + Str(guess) + "?")
  
  Repeat
    Event = WaitWindowEvent()
    If Event = #PB_Event_CloseWindow ; If the user has pressed on the close button
      End
    EndIf
    
    MenuID = EventMenu()
    Select Event
      Case #PB_Event_CloseWindow
        End
        
      Case #PB_Event_Menu
        Select MenuID
          Case #CorrectGuess
            AddGadgetItem(Editor_0, -1, "Game over. Your secret number was " + Str(guess))
            RemoveKeyboardShortcut(Window_0,#PB_Shortcut_C)
            RemoveKeyboardShortcut(Window_0,#PB_Shortcut_L)
            RemoveKeyboardShortcut(Window_0,#PB_Shortcut_H)
            
          Case #LowGuess, #HighGuess
            If MenuID = #LowGuess
              low = guess
            Else
              high = guess
            EndIf
            guess = (high + low) / 2
            AddGadgetItem(Editor_0, -1, "Is your secret number " + Str(guess) + "?")

          Case #Escape
            End
            
        EndSelect
        
        
    EndSelect
    
  ForEver
  
Else
  MessageRequester("Error","Could Not Open Window")
  End
EndIf

Posted: **Wed Aug 05, 2020 7:21 am**

But you can also do it as console programm without a window event loop

Posted: **Wed Aug 05, 2020 6:39 pm**

Ok, it seems the problem was my While loop which you just discarded, which I thought was necessary for some reason.
You just moved the required input into the appropriate Case and voila. After I see it it seems so simple, but I couldn't figure it out for the life of me.

Thanks Bernd,

(not the first time you have helped me, always appreciated)

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