- Inkscape Devel - Inkscape Mailman

Launchpad bug mail improvements
by Johan Engelen 20 Jan '12

20 Jan '12

Hi all, Have a look at this post: http://blog.launchpad.net/cool-new-stuff/better-bug-subscriptions Now, you can unsubscribe from the mails you get from your Inkscape Bug Team membership. In addition, you can add your own individual subscription with filtering on Launchpad's side (instead of in your mail client). Great work! Johan

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Re: [Inkscape-devel] Writing an extension
by Trever L. Adams 19 Jan '12

19 Jan '12

> Date: Mon, 16 Jan 2012 10:24:00 +0100 > From: Jasper van de Gronde <th.v.d.gronde@...528...> > Subject: Re: [Inkscape-devel] Writing an extension > To: inkscape-devel(a)lists.sourceforge.net > > On 13-01-12 19:10, Trever L. Adams wrote: > > This relates to https://bugs.launchpad.net/inkscape/+bug/247463 and > > comment 37 in particular. > > > > I would like to be able to attach information to objects that are needed > > for high quality digitization. This includes stitch length and stitch > > direction. I am thinking of displaying the direction as gradient, > > although direction may be very complex. I am just learning about SVG so, > > I do not know if there are smart ways of doing this. (For example, think > > of a leaf, where you may have 20 different direction changes.) I also do > > not know XML very well (creating schema, etc). > So basically you want to embed information needed to convert a drawing > to something that can be embroidered? And you want this information to > be visible and manipulable in Inkscape's interface? Yes, I am starting from information I have found here: http://jumpnslide.tumblr.com/post/2557920924/how-to-use-inkscape-as-a-game-… I am missing just a few pieces of information: 1) How do I set values in the interface (fetch them from the SVG)? I have defaults working, etc. 2) How do I insert my custom attributes back into the SVG? The following partial code block doesn't do #2 properly and actually crashes inkscape: #Loop through all the selected items in Inkscape for id, node in self.selected.iteritems(): #Check if the node is a Group ( "svg:g" tag in XML ) if node.tag == inkex.addNS('g','svg'): #DO SOME THINGS TO GROUPS outputBlock += "Found a Group!" + "\n" children = list(node) for node2 in children: outputBlock += "Group " + str(node) + " contains: " + str(node2.attrib["id"]) + "\n" node2.attrib["max_stitch_length"] = str(max_stitch_length) I am sure I am going to have to create an XML schema right? If so can you point me in the right direction? > > > So, is there a standard way to extend SVG or embed such codes in SVG for > > a given object? > Extending SVG is in principle very easy, just define a namespace that > hasn't been taken yet (and preferably as specific as possible) and use > elements/attributes from that namespace. Ideally you would also create a > schema to define which elements/attributes are in that namespace and so > on, but I wouldn't necessarily start out that way (although it's > obviously a good idea to think about a formal definition if you want > this to be used by others as well, and/or save yourself some trouble in > the future). > > The idea is that viewers/editors will ignore anything they don't > recognize. The extent to which this is true in practice varies a bit, > and it's definitely not a given that an editor (Inkscape) will preserve > the tags, but in principle it should "work" (in the sense that nothing > will suddenly go wrong). Can you provide me with any urls which show an example of how to create an XML schema? In the past when I have looked, I just walk away with a headache. > > I would like to do this in SVG and Inkscape since I believe both are > > scriptable and both can be used for print as well. (This is a project > > for both print and embroidery.) > Inkscape itself is not really scriptable. What you can do is write a > python extension that essentially gets a piece of SVG to transform. But > this is fairly flexible. Also, if you know C/C++ you might be able to > write something like an LPE to help out. LPE? I do know several languages, including C/C++. I thought Inkscape was. I would like to be able to change colors (and maybe remove them in some cases), resize and place objects and save/load files from scripts. > > > Additional request for information: > > Is it possible to define a custom color table? Embroidery machines > > usually have a fixed color table (which can be converted to various > > thread vendor product/color numbers). > Not sure, but I think there is at least some support for color > management. Perhaps someone else knows more about this? I think the palettes was what I was looking for and have since learned how to do this. > > > Is it possible to turn an outline on for an object and give it a > > different color than the object, or easily create an outline? > You mean outline as in stroke? If so, that's trivial in SVG, every > object intrinsically has a fill and a stroke. Yes, I finally figured this out. As I said, new to inkscape and SVG. > > > Finally, is there a way to do "Ungroup repeatedly until there are no > > groups left, and convert objects to paths." as part of an extension > > (http://www.jonh.net/~jonh/inkscape-embroidery/) without modifying the > > original (as part of an export, etc.)? > I think it's possible to create extensions for output as well, so > conceivably this would be possible. In any case, you might want to have > a look at this extension: > > https://gitorious.org/various-small-stuff/inkscape-ungroup-deep/ > I am starting to wonder if I actually need this, but on having looked at that code, I was able to at least start working on groups with my code. Thank you, Trever

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Codestyle: _*
by Johan Engelen 18 Jan '12

18 Jan '12

Hi all, I am busy 'improving' a small part of the code to use an underscore for class members. I think this helps fight bugs when converting C functions to class methods. For example, a SPPath function may define a temporary variable 'curve', but that one will hide the class's own 'curve' variable (inherited from SPShape). Since the class hierarchy is quite long at places, this is not so easily spotted. So I think the _* stuff for members is really nice and clarifies code a lot. However, now I read in our codestyle document: * Underscore as first character of identifiers Please consider that the C++ standard reserves _* identifiers [17.4.3.1.2]: "Each name that begins with an underscore is reserved to the implementation for use as a name in the global namespace". Hmm, quite a large part of our codebase already uses _* to signify class members. I think this is somewhat common practice? Do we agree to ignore this text in the C++ standard? And shall we change our codestyle text to indicate that we use _* to indicate class members? (I hope this does not result in long maillist discussions... Please answer yes or no. I am already convinced that _* is better than without, and cannot be convinced otherwise. (I _may_ consider 'm_' but it is perhaps overly verbose?)) Thanks, Johan

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Re: [Inkscape-devel] Powerstroke requests
by Valerie 18 Jan '12

18 Jan '12

If I may add a few words about interface... Inkscape now has several pretty fun options for path shapes: - Simple line - Pattern along path - Powerstroke - Sketch brush - [anything I might have missed. There will probably be future options too] Now, for the "shape" drop-down I rarely use the presets because they are rarely the exact width I need them at, it's easier to create the right shape and copy it. So, how about the following? Shape: - Line - Thick stroke (<- powerstroke) - Sketch brush - Clipboard - Custom (insert drop-down of shapes you've saved for Pattern along Path) It's rather unfortunate that Inkscape's tool control bar is static, otherwise I'd recommend for common options (like width and repeat options in Pattern Along Path) to appear depending on the shape you've selected. (though in the meantime, can someone please add dashes and markers to the tool option bar? Having to hunt through two layersof Fill & Stroke dialogue each time is a bit annoying... also, a button to match marker colors to stroke color rather than hunting through the menus, please? Some of us do a lot of graphs in Inkscape...) More generally, I'd like to see some proper of sorting of LPEs eventually: - Path shapes can be integrated into pen and other tools - Effects like Gears seem like they belong in Extension -> Render - I'd also Really like easier and on-canvas access to some transformations that would probably be used more often if access were easier (not only LPE): Envelope, Perspective, and Envelope deformation. Couldn't we include them as a drop-down options (like with pen and Shape) in the Select and Transform tool? I can do mock-ups.

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cannot compile rev 10891 (Windows XP)
by alvinpenner 17 Jan '12

17 Jan '12

attempting to compile rev 10891 I get the following error message: Make error line 289: problem compiling: src/2geom/conicsec.cpp:1491:20: error: prototype for 'std::vector<Geom::Point> Geom::xAx::allNearestPoints(const Geom::Point&) const' does not match any in class 'Geom::xAx' src/2geom/conicsec.h:477:24: error: candidate is: std::vector<Geom::Point> Geom::xAx::allNearestPoints(Geom::Point) const - Alvin -- View this message in context: http://inkscape.13.n6.nabble.com/cannot-compile-rev-10891-Windows-XP-tp3677… Sent from the Inkscape - Dev mailing list archive at Nabble.com.

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Traversing nodes of a path in order
by Maximilian Albert 17 Jan '12

17 Jan '12

Hi all! After a long break I just had a quick play-around with some of the Inkscape code. At some point I needed to traverse the nodes of the selected path in the order in which they appar along the path, but I couldn't find out how to do it in the limited time I was able to spend. What's the correct/recommended way of doing this? Are there some examples on the wiki or somewhere else? Cheers, Max

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Writing an extension
by Trever L. Adams 16 Jan '12

16 Jan '12

This relates to https://bugs.launchpad.net/inkscape/+bug/247463 and comment 37 in particular. I would like to be able to attach information to objects that are needed for high quality digitization. This includes stitch length and stitch direction. I am thinking of displaying the direction as gradient, although direction may be very complex. I am just learning about SVG so, I do not know if there are smart ways of doing this. (For example, think of a leaf, where you may have 20 different direction changes.) I also do not know XML very well (creating schema, etc). So, is there a standard way to extend SVG or embed such codes in SVG for a given object? How would I go about attaching buttons, etc. in the GUI? Can I have Inkscape view the direction code as a gradient for display (if an option is set)? Or, show the fill as lines going in that direction? (Again, this wouldn't be done in printing/export/etc., only in viewing with an option set.) I would like to do this in SVG and Inkscape since I believe both are scriptable and both can be used for print as well. (This is a project for both print and embroidery.) Additional request for information: Is it possible to define a custom color table? Embroidery machines usually have a fixed color table (which can be converted to various thread vendor product/color numbers). Is it possible to turn an outline on for an object and give it a different color than the object, or easily create an outline? Finally, is there a way to do "Ungroup repeatedly until there are no groups left, and convert objects to paths." as part of an extension (http://www.jonh.net/~jonh/inkscape-embroidery/) without modifying the original (as part of an export, etc.)? Thank you, Trever

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nigthlies ppa
by Alexandre Prokoudine 14 Jan '12

14 Jan '12

Hi, Apparently https://launchpad.net/~inkscape-nightly/+archive/ppa turns up first in google for "Inkscape nightly", even though it's an outdated PPA. Could we please somehow redirect people to the real one? Alexandre Prokoudine http://libregraphicsworld.org

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Extended input issues with later GTK2
by Jon Cruz 13 Jan '12

13 Jan '12

Just wanted to toss out a note that I think I've found a main problem with how Inkscape deals with extended input devices. The issue where they give no extended pressure, etc. on later GTK2, including that in Ubuntu 11.10, is due to missing event initialization. I'm trying to narrow it down a bit. Of course, there are still some other bugs that appear to give random garbage in the middle of extended input. There's a good chance that a simple work-around could even filter those out. So, the main thing now is to know if anyone is trying to use tablets currently and is tripping over GTK2 extended input problems. Speak on up and we might be able to get things at least passible soon. Thanks.

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regression in current trunk (r10873) when zooming in/out
by ~suv 12 Jan '12

12 Jan '12

A recent commit (one of r10870-10873) has changed how the canvas gets redrawn (prior build r10869 is still ok): with my latest builds of r10873 [1], the canvas is not properly cleared when zooming in/out. Steps to reproduce: 1) open the attached file in Inkscape 2) zoom in closer and then zoom back out several times --> result: <http://imgh.us/regression-test-r10873-2-screenshot.png> (compare to <http://imgh.us/regression-test-r10873-2.svg>) ~suv [1] tested on Leopard and Lion: - Gtk+/X11 with cairo 1.10.2 (32bit, 64bit), debug + optimized - Gtk+/Quartz with cairo 1.11.2 (32bit), optimized

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