PureBasic Event-Loop for multiple Windows explained

[Theo Gottwald]

Creating a Application with multiple Forms is not "easy going" in PureBasic.
Not like in Firefly or in Phoenix, just drag and drop.

Instead you have to handcode the event-loop.

Here is an example for 2 Forms.
It can easily be customized for many more forms.

Code Select Expand

;---------------------------------------------
; Main
;---------------------------------------------

; OpenConsole() + PrintN("") -> very good for Debug-Printing

: Opens the Form and generates all the controls of the Main -Form
OpenFRM_Main()

; Set all the controls of Mainform to their default state
Main_Init()

; Here is the Main-Event-Loop
Repeat     
 
   ; Get the Event
  Event = WaitWindowEvent()   

   ; Get the Windowhandle of the window for which the event was
   Fes.l=EventWindow()

    Select Fes
      Case FRM_Main
         ; This Procedure is for the Events of the Main-Window-Form
         FRM_Main_Events(event)       
      Case FRM_Set
        ; This Procedure ist for the Events of the Settings-Form
        FRM_Set_Events(event)       
   EndSelect

  ; If the Settings-Form is closed, the Application should NOT END.
  ; If the Main-Form is closed the application should end. This happens here below.
   If Event = #PB_Event_CloseWindow ; Beenden, wenn eines der Fenster geschlossen wird.
     If Fes=FRM_Main
       Break
     Else 
       CloseWindow(Fes)   
     EndIf 
   EndIf
ForEver

; The "Break" from above comes here .... if the Main-Form is closed
CloseWindow(Fes)
End