FXR-uby - SEL_CLOSE event


#1

This suggestion was posted by Lyle some time ago:

When you click the kill button on the main window, it (the
FXMainWindow
object) first sends a SEL_CLOSE message to its message target, if any.
If that target handles the message then life goes on (i.e. the
application doesn’t shut down). If the main window doesn’t have a
message target, or if it does but the target doesn’t handle the
SEL_CLOSE message, then the main window sends a SEL_COMMAND message
(with identifier FXApp::ID_QUIT) to the application (FXApp) object.
And
that more or less terminates the main FOX event loop.

So for what you’re describing, I think I’d try something like this:

 theMainWindow.connect(SEL_CLOSE) do
   # Do fun things
   verify_things
   clean_up_things

   if ok_to_quit?

     # All is well to shut down, so go ahead
     # and send the ID_QUIT message to the
     # application.

     theMainWindow.app.handle(theMainWindow,
       MKUINT(FXApp::ID_QUIT, SEL_COMMAND), nil)
   else

     # We've decided not to shut down after all

   end
 end

Hope this helps,

Lyle

I see what you did in the above example, and I’m trying to do the same
thing in my code without much luck.

Here’s how my class is defined:

class DataTable < FXMainWindow

And then my widgets are attached to this object:

contents = FXVerticalFrame.new(self,
  LAYOUT_SIDE_TOP|FRAME_NONE|LAYOUT_FILL_X|LAYOUT_FILL_Y)

Then the code is like this:

frame = FXVerticalFrame.new(contents,
  FRAME_SUNKEN|FRAME_THICK|LAYOUT_FILL_X|LAYOUT_FILL_Y) do |f|
  f.padLeft = 0
  f.padRight = 0
  f.padTop = 0
  f.padBottom = 0
end

# Table
@@table = FXTable.new(frame, 20, 7, nil, 0,
  TABLE_COL_SIZABLE|TABLE_ROW_SIZABLE|LAYOUT_FILL_X|LAYOUT_FILL_Y,
  0,0,0,0, 2,2,2,2)

I don’t know how to capture the SEL_CLOSE event in my program because
if the dialog box used in the program for data entry is open, and
there have been changes, I want to warn the user about those changes.
I tried attaching the .connect(SEL_CLOSE) to the contents object, but
that didn’t work.

Thanks for the help,

John Reed