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- From: qb7g6@fel.tno.nl (Maarten Landzaat)
- Newsgroups: comp.windows.open-look,alt.toolkits.xview
- Subject: FYI: DevGuide 3.0 experiences
- Message-ID: <1993Jan21.170515.8971@fel.tno.nl>
- Date: 21 Jan 93 17:05:15 GMT
- Organization: TNO Physics and Electronics Laboratory
- Lines: 94
-
-
- Hi, I wrote the following for a final document after having used
- DevGuide 3.0 for some time. You might find it useful to
- hear from my experiences. If you have have any comments,
- please do not hesitate to email or followup.
-
- I used DevGuide 3.0 with Xview and gxv++ only.
-
- ----------------------8<--------------------------------------------
- WORKING WITH DEVGUIDE
- ---------------------
-
- Some unexpected features of DevGuide 3.0 were discovered while
- seriously using it. Most issues addressed below cannot be found in the
- DevGuide manuals.
-
-
- Tips & Tricks
- -------------
-
- This trick is applied on the lower layered pane:
- If you want the previous control area to re-appear, you only have
- to hide the current control area. This seems to work flawlessly.
- It has not been tested if this works more than once, i.e.
- hiding the visible control area more than once.
- The alternative would have been to use a variable which keeps track
- of the previously visible control areas.
-
- The following feature is available in DevGuide, but appeared to be "not
- implemented" in gxv++ for Xview. gxv++ generates a x_stubs.cc file without
- warning, inserting comment lines like "not implemented". The feature
- is a connection "from" anything "to" enabling or disabling an
- nonexclusive setting item. The workaround is to do a "manual" xv_set
- on the setting's PANEL_VALUE. The PANEL_VALUE is a bitmap of the
- states of the setting items. The LSB corresponds to the first item,
- etc. See the O'reilly's XView book for more details.
-
- When there is a callback defined for a Notify or Deselect event for
- an exclusive menu item, and only one item is touched, callbacks
- will be called for all items instead of just the touched item.
- This means that many callbacks are useless, since the corresponding
- user interface element did not undergo a real change.
- This is theoretically not a problem, but in practice it may be,
- especially when the callback takes much time.
-
- Help texts must be entered without carriage returns if you want
- them to be aligned correctly. The DevGuide window in which the text
- is edited, and the runtime help window have different sizes, so
- aligning the text is best left to the help system. If you want blank
- lines, you may enter carriage returns.
-
- DevGuide does a reasonable good job keeping the manual adjustments
- merged with the generated part of x_stubs.cc. But when a UI
- element is deleted or renamed, gxv++ thinks the old piece of code
- is written by the user, and therefore keeps it in the file. The
- stubs file may grow at best, but will not compile at worst. When
- a compilation error occurs, the offending old code can simply be
- removed. It is recommended to temporarily throw away the stubs file,
- generating a new one, and merging it with the manual changes again.
- For this reason it is wise to have only a few small manual changes.
-
- Be sure that each popup window has an existing parent. If not,
- everything seems to be working fine, until you click on the pushpin
- to dismiss a popup window. The window will never be seen again.
-
- Bugs in DevGuide
- ----------------
-
- Showing/hiding a setting item in a connection works on the entire
- setting instead of just the item.
- A workaround is to make a separate setting with one item if
- you want to selectively show or hide that item.
-
- When a help text is slightly longer than can be shown in the runtime
- help window, the scrollbar cannot be moved. This means that the
- remaining help text cannot be read.
- A workaround is to append a few carriage returns to the help text
- using DevGuide. The scrollbar will then be moveable.
-
- The following applies to a pinnable exclusive menu with notify
- callbacks on each menu item: if the menu is not pinned, everything is
- fine, but if the menu is pinned, and some item is chosen, the callback
- of the last item is called, instead of the corresponding callback.
- A workaround is to put an exclusive setting in a popup window, which
- looks and acts very similar.
-
- In DevGuide's test mode, the behaviour of the pushpins is not exactly
- the same as in reality. This is not severe if you know about it.
- ----------------------8<--------------------------------------------
- --
- Maarten J. Landzaat (analyst/programmer, bass player, Atari/midi freak)
- BSO/Aerospace & Systems Mail: Spuistraat 97
- Email: maarten.landzaat@fel.tno.nl 1012 SV Amsterdam
- Phone: +31 20 6266098 The Netherlands
-