RBC - Refactored BLT Components - Initial Release
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From: Bob Techentin on 13 Oct 2009 09:56 On Oct 13, 7:11 am, Uwe Klein <uwe_klein_habertw...(a)t-online.de> wrote: > > afair the bltZoomStack stuff is (completely) contained in graph.tcl > i.e. it is implemented as scriptonly Yes. I just looked at the code. It is all script. But I think the namespaces might have been munged up a bit, which would explain why changing application code from blt_Crosshairs to rbc_Crosshairs wouldn't work. blt::PushZoom and blt::PopZoom both surround an [update] with [busy hold $graph] and [busy release $graph]. I guess the busy could just be removed, but there would likely be some bad behavior. I also see some instances of the blt::table command in the postscript dialog. There are probably others. But we could probably make most of this script code work, mostly. :-) Bob
From: Roger O on 15 Oct 2009 08:01 Using RBC, I have just compiled a C application that uses Blt/Rbc vectors in the C code to manage data viewed via Tk scripts (managed by the same application) using things from Blt like ::blt::notebook and ::blt::stripchart. After renaming all the necessary items, I then tried the application. It stops with this error: invalid command name "::rbc::tabnotebook" Should this command exist? Perhaps it is not the rbc namespace? I do not see it in the list of what Rbc is (original post in this thread). But I also do not see it in the list of what is not done. I am using the blt/rbc tabnotebook because it has some nice features (e.g., detach and reattach a tab). I can consider using a different tab notebook system; however, as I need Blt (and other functionality) I am kind of stuck at Tcl 8.4.12. The next possible release of Tcl I can use is 8.5.5 - but then I cannot use Blt. Anyway, I first want to sort out if the notebook command should be available. When I know that I can, if needed, investigate alternatives. OOC, what is the eventual goal with RBC? Is this a split from Blt? Does anyone know if the Blt author is interested in these changes?
From: Roger O on 15 Oct 2009 08:31 Bad form to follow up my own post. But I am happy. I replaced the calls to the ersatz notebook command with one from ttk, and I have a running application. It exercises: - Creating vectors from C - Making stripcharts and barcharts in scripts, and having them update when the C code updates the vector they display. I will test more. But to me this is a big step forward for using Blt^h^h^Rbc with newer Tcl/tk releases. My tests were with 8.5.5, I will, of course, try newer. Probably when openSUSE 11.2 is released. If I have any issues, it is with the ttk notebook. It misses some nice features that the Blt one has. But I guess that is a different issue. Is there any technical reason the notebook was dropped? Was it a case of who needs yet another notebook widget?
From: Bob Techentin on 15 Oct 2009 10:24 On Oct 15, 7:31 am, Roger O <roger.oberholt...(a)gmail.com> wrote: > > Is there any technical reason the notebook was dropped? Was it a case > of who needs yet another notebook widget? There was no _technical_ reason for dropping BLT's notebook, table, or treeview. I just didn't need them. And good (supported) replacements exist for all of them. I wanted to concentrate on the unique parts of BLT - the things that I can't get anywhere else. At this point, Rbc is a fork of BLT. I did my best (as did others) to contact George Howlett more than a year ago when we embarked on this project, and we got no response. I still see CVS activity in the BLT project on sourceforge, but I haven't found anyone who knows what is going on there. Good luck, Bob
From: Tim Wallace on 15 Oct 2009 10:52
My view is the same as Bob's. George hasn't released anything in years, and I used to download a CVS snapshot every year or so and see if it would magically work with newer versions of tcl, but no dice. The latest one I looked at about a year ago seemed to have removed the "grid" command and subsumed it in the "axis" command. This is too big a change for me to have any interest in unofficial CVS snapshots any more. We are using a patched-together version of an old CVS snapshot with 8.5, but are 100% planning on going with Bob's version in the future! Vectors and graphs are what we need. --Tim Bob Techentin wrote: > On Oct 15, 7:31 am, Roger O <roger.oberholt...(a)gmail.com> wrote: >> Is there any technical reason the notebook was dropped? Was it a case >> of who needs yet another notebook widget? > > There was no _technical_ reason for dropping BLT's notebook, table, or > treeview. I just didn't need them. And good (supported) replacements > exist for all of them. I wanted to concentrate on the unique parts of > BLT - the things that I can't get anywhere else. > > At this point, Rbc is a fork of BLT. I did my best (as did others) to > contact George Howlett more than a year ago when we embarked on this > project, and we got no response. I still see CVS activity in the BLT > project on sourceforge, but I haven't found anyone who knows what is > going on there. > > Good luck, > Bob |