ltk-user January 2010

ltk-user@common-lisp.net

3 participants
3 discussions

[ltk-user] [patch] Improved ttk treeview support
by Daniel Herring 18 Feb '10

18 Feb '10

Hi Peter, Please consider the attached patch against http://ltk.rplay.net/svn/branches/ltk/repl@215 It implements several essential treeview commands; they are being used to implement a symbol/package browser for ABLE. http://common-lisp.net/project/able/ The attached treeview-example.lisp demonstrates their usage. * (load "treeview-example.lisp") * (ltk-user::show-symbols :ltk-user) Thanks, Daniel

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[ltk-user] Erasing things ..
by Greg Bennett 12 Jan '10

12 Jan '10

Good morning and Happy New Year, all. I have trolled through ltk.lisp in an attempt to discover how to erase things .. lines, rectangles, ovals .. drawn by create-line etc.. I was looking for things like erase-line or delete-rectangle, but could not find anything like this. The closest I came to discovering this sort of functionality was the destroy facility, which seems to destroy widgets. In drawing a shape, however, I may do not usually create it explicitly as a widget with an associated symbol to feed to destroy; must I do this under ltk ? More than likely I have simply missed something (sigh). Thanks in advance for any help and advice. Cheers /Greg Bennett

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[ltk-user] ensure-ltk ?
by Daniel Herring 05 Jan '10

05 Jan '10

Hi, What's the proper idiom when writing a function that might start wish or might be called inside another with-ltk? For example, (defun some-window () (ensure-ltk () ...)) Where some-window could be called from a REPL or from a tk callback? Is there already a way to do this in ltk, or should I define a macro something like the following seemingly broken code? (defmacro ensure-ltk ((&rest options) &body body) (let ((fname (gensym))) `(labels ((,fname () ,@body)) (if (wish-stream *wish*) (,fname) (with-ltk ,options (,fname)))))) Thanks, Daniel

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ltk-user January 2010