The Be Book - Special Topics - System Messages
The file panel produces three messages:
B_REFS_RECEIVED,
B_SAVE_REQUESTED, and B_CANCEL. The first of these was discussed in
"General Messages".
It's produced when the user picks files to open from
the panel. The other two messages are described below.
The file panel produces this message when the user asks the application to save a document. It has two data fields:
| Field | Type code | Description |
|---|---|---|
directory | B_REF_TYPE | An entry_ref referring to the directory where the document should be saved. |
name | B_STRING_TYPE | The file name under which the document should be saved. |
A cancel notification is sent whenever a file panel is hidden. This includes the Cancel button being clicked, the panel being closed, and the panel being hidden after an open or a save.
| Field | Type code | Description |
|---|---|---|
old_what | B_INT32_TYPE | The "previous" what value. This is only useful
(and dependable) if you supplied the
BFilePanel
with your own
BMessage:
The what from your message is moved to the
old_what field. If you
didn't supply a
BMessage,
you should ignore this field (it could contain garbage). |
source | B_POINTER_TYPE | A pointer to the
BFilePanel
object. |
