OpenEuphoria

Re: Phix object arrays

• Posted by irv Feb 03, 2021
• 895 views

Simplest solution seems to be to forget making an array, and just name the items.

include GtkWindow.e 
include GtkBox.e 
include GtkButton.e 
 
Window win = new() 
  win.border_width = 10 
  win.connect("destroy","Quit") 
   
Box pan = new() 
  win.add(pan) 
 
for i = 1 to 5 do    
  Button x = new() 
  x.label = sprintf("Button %d",i) 
  x.name = sprintf("B%d",i) -- name 'em. 
  x.connect("clicked","Toggle") -- any button click calls Toggle() 
  pan.add(x) 
end for 
 
win.show_all() 
gtk_main() 
 
public function Toggle() 
Object y = from_name("B2") -- retrieve by name,  
 
-- some various ways to toggle: 
 
y.sensitive = not y.sensitive --[A] works 
-- Warning sq_not assumed  
 
y.sensitive = not(y.sensitive) --[B] works 
-- same warning 
 
y.sensitive = (y.sensitive = 0) --[C] works 
-- no warning, but awkward 
 
y.sensitive = sq_not(y.sensitive) --[D] works 
-- no warning, strange syntax  
  
-- What am I missing here?  
-- Shouldn't [A] or [B], the most "normal" syntax, 
-- be the default and not issue a warning? 
-- After all, y.sensitive is not a sequence, it is a boolean, 
-- so assuming that it needs a sequence operation is wrong somehow. 
 
return 1 
end function 

Further testing proves that this method works OK for buttons, because there are rarely going to be more than a few. For menus, it requires far too much work, too many lines of code. It's going to be necessary to find a way to use arrays of widgets in some manner. Perhaps a WidgetArray class?