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- Newsgroups: comp.sys.acorn.tech
- Path: sparky!uunet!mcsun!ub4b!news.cs.kuleuven.ac.be!gate!lorca!tytgat
- From: tytgat@esat.kuleuven.ac.be (John Tytgat)
- Subject: Re: New Template format discussion document
- Message-ID: <1993Jan8.113649.10579@gate.esat.kuleuven.ac.be>
- Originator: tytgat@lorca
- Sender: tytgat@esat.kuleuven.ac.be (John Tytgat)
- Reply-To: tytgat@esat.kuleuven.ac.be (John Tytgat)
- Organization: K.U.Leuven, Belgium
- References: <4897@svin09.info.win.tue.nl> <1993Jan6.113946.4153@gate.esat.kuleuven.ac.be> <1993Jan7.203406.16154@cs.aukuni.ac.nz>
- Date: Fri, 8 Jan 1993 11:36:49 GMT
- Lines: 93
-
- jwil1@cs.aukuni.ac.nz (TMOTA) writes:
-
- > NO! You *must* use *tags* for icons! We use messagetrans tags for text, and
- > tags for window names, and we intend to have tags for menu entries, so why
- > leave this stupid icon-number thing in place?
-
- I agree that using tags for icons is a good idea. But if you are only using
- tags for referring icons you lose information about the icon overlap (Dick
- Alstein also noticed this). This is eg. very important when you are using
- certain 3D icons.
-
- Therefore I suggested to include also an icon-number together with each
- icon definition. This icon-number is in fact totally invisible for the
- Glass editor user and will define the icon order in the window definition.
-
- If the user wants to move an icon to the front/back, he can simply choose
- '<' or '>' icons (like in ArtWorks) and internally this results in an
- icon-number renumbering. Note that this icon-number is *not* being used in
- the program to determine a certain icon (we use iconnames for this), but only
- when building up the window definition for Wimp_CreateWindow.
-
- This system allows the user to move the icons. However, when we want to
- allow user to create new icons or to delete icons (do we want that ?), an
- icon renumbering has to happen, so we're back to point zero.
-
- Maybe a better way could be : if there is an icon which has to be absolute in
- front of certain other icons, it can have a list of their icon names somewhere
- in this icon definition.
-
- I think the latter is the most flexible one, but maybe not simpliest to deal
- with. Opinions, please.
-
- > If you are really concerned about icon tags taking up a lot of sapce, then
- > I suggest that icon tags are either:
- > * 8 bytes of text, or
- > * 4 bytes of text/an integer.
-
- I never said I was concerned about space (although not in this discussion ;-)).
-
- wsinda@wsintt05.info.win.tue.nl (Dick Alstein) wrote:
-
- > Doing icon grouping as in !Draw has the advantage that it enforces a proper
- > nesting (if two groups have objects in common, then one group must be a part
- > of the other). However, in Draw files, objects are self-contained (except for
- > font handles, I think); all data needed to render an object can be found
- > inside the definition block. IMO, it would be best to split the Indirected
- > Data tables and attach the data for each icon to the icon definition block.
-
- Why is it so important to make self-contained icon objects ? Would the split
- of the Indirected Data tables make reading/writing Glass files not more
- difficult ?
-
- > A consequence is that you are limited in how icons overlap: if icon A
- > overlaps icon B, then all icons in the same group as A overlap B. But I
- > think that's not a big restriction.
-
- On the contrary, I think it *is* a big restriction (see above).
-
- > Another (logical) consequence is that you have to hide the icon numbers from
- > the programmer; if the grouping changes, then the order of the icon
- > definitions in the file may change completely; hence icon numbers are very
- > "unstable", and the programmer should only refer to icons by their names.
-
- Agreed.
-
- jwil1@cs.aukuni.ac.nz (TMOTA) writes:
-
- > In DSEdit, I have no default text in my application. This is simply because
- > the messages file is so absolutely mindbogglingly important that there is
- > no point in even trying to run without it... As the text for all interactions
- > and the menus are messagetransed, I can't really see any point in defaults
- > most of the time...
-
- Neither can I.
-
- > I would say the easiest way is to specify a bit which indicates that the
- > text is actually a tag, and then in the application-side support code that
- > is supplied with the template editor, put in a method by which these
- > text items can be 'expanded'. Off the top of my head, I'd say a nice way to
- > approach this might be to register a messagetrans decoding function with
- > the support code, so it calls some user-defined function, passing in the
- > tag, and gets back a pointer to the actual string...
-
- Not such a bad idea.
-
- Another point I would like to raise is : are we going to support Acorn's
- Help application by defining a help string in each window/icon and menu entry
- (it should also be language independant) ?
-
- John
- tytgat@esat.kuleuven.ac.be
- BASS
-
-