June 2013 - Inkscape Devel - Inkscape Mailman

[Units] Existing Unit Support
by Matthew Petroff 21 Jun '13

21 Jun '13

Over the past two weeks, I have looked at Inkscape's code, outlined existing unit support, and planned my approach to refactoring it. http://www.mpetroff.net/archives/2013/06/17/current-state-of-units/ -Matthew

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Ungrouping SVG
by Martin Owens 20 Jun '13

20 Jun '13

Hey Lauris, I'm fixing https://bugs.launchpad.net/inkscape/+bug/166327 and I have to commit code which goes directly against your comment in the code: 787 /* We do not allow ungrouping <svg> etc. (lauris) */ 788 if (strcmp(group->getRepr()->name(), "svg:g") && strcmp(group->getRepr()->name(), "svg:switch")) { Since I'm enabling the ungrouping of svg elements, I have to ask why we may not want to be able to upgroup svg elements. Should we check for element->parent != NULL here to make sure we don't ungroup the top-level element by mistake? Martin,

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[inkscape-devel][Recolor]Colorwheel Alpha Bar
by Arshdeep Singh 20 Jun '13

20 Jun '13

Hello devs, I have succesfully reached a considerable milestone in modifying the current colorwheel in my branch. It now looks like this: [image: Inline image 1] I need to add a 'Lightness' value bar similar to the Alpha bar in the wheel GUI. I am having trouble finding the code that does that ! Been stuck on it for a day, can't afford to lose more time on this. Can anyone help ? - Arshdeep Singh Third Year, Computer Engineering Delhi Technological University Ph: +91-9654115614 https://sites.google.com/site/adsingh1729/home

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Shortcut for Object > Clip > Set
by Javier Garcia 18 Jun '13

18 Jun '13

Hi, Could you add a shorcut for that? Regards Javi

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Q: How to Generate a Rotated linearGradient whose angle will stick?
by Shlomi Fish 17 Jun '13

17 Jun '13

Hi all, I am resending this to the *-devel list due to getting now answers on the user list and someone suggesting on the list that I send it here. --------------------------------------------------- Q: in my extension I have this: class StyleEffect(GenericAddPathEffect): def effect(self): self.xpathSingle(u'svg:defs').insert(0, inkex.etree.XML('''<svg:linearGradient xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" id="bk2hp_grad"> <stop style="stop-color:#0000ff;stop-opacity:1" offset="0" id="b2h_0" /> <stop style="stop-color:#00deff;stop-opacity:1" offset="0.4" id="b2h_1" /> <stop style="stop-color:#00deff;stop-opacity:1" offset="0.6" id="b2h_2" /> <stop style="stop-color:#0000ff;stop-opacity:1" offset="1" id="b2h_3" /> </svg:linearGradient>''') ) self.xpathSingle(u'svg:defs').insert(1, inkex.etree.XML('''<svg:linearGradient xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="bk2hp_grad_rot" gradientTransform="rotate(90)" xlink:href="#bk2hp_grad" />''') ) self.xpathSingle(u'//*[@id="' + main_path_id() + '"]').set( 'style', simplestyle.formatStyle({ 'stroke': '#888888', 'stroke-width': '1pt', 'fill': 'url(#bk2hp_grad_rot)', } )) Which generates a linearGradient and a rotated version of it. However, when I move the path filled with the rotation, it reverts to the non-rotated version. I'm attaching it here. Why is Inkscape doing it? Is it a bug? You can find the extension in question here: https://github.com/shlomif/Shlomi-Fish-Back-to-my-Homepage-Logo/blob/master… Regards, Shlomi Fish -- ----------------------------------------------------------------- Shlomi Fish http://www.shlomifish.org/ NSA Factoids - http://www.shlomifish.org/humour/bits/facts/NSA/ If the mountain will not come to Muhammad, then Muhammad will go to the mountain. — Francis Bacon Please reply to list if it's a mailing list post - http://shlom.in/reply .

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Markers, a note about Rev 12363
by Martin Owens 16 Jun '13

16 Jun '13

Dear Devs, I've just pushed revision 12363, it includes a simple but user-facing change to the markers in the stroke-dialog which puts them all on one line and removes the drop down label. Now looks like this: http://imagebin.org/261038 I decided to keep the label row data for MarkerCombo for posterity, but remove the display function. I also used the hbox which cut down dramatically on lines since hbox use is the same between gtk2 and 3. I didn't compile with gtk3, but I expect it to work. Please let me know if there are any problems you have with the change. I decided to implement to favored design change after reviewing the feedback on a group of design changes for the stroke dialog. Other designs didn't make the grade so I've left those out. Best Regards, Martin Owens

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Selection and Symbols
by Martin Owens 16 Jun '13

16 Jun '13

Dear Devs, I'm still working on this UI update for symbols. It's mostly working now, with the exception of the UNSYMBOL verb which as originally implemented required a use element be selection which referenced the right symbol. To fix this weirdness, I wanted to try out an idea. What if selecting a symbol in the TreeView on the right changed the currentDesktop->selection too. Then the verb could act on the selected item directly and as an added bonus, there's a conceptual way to select defs and maybe act on them in the future functionality or plugins (imagine a plugin that acted on a symbol, cool). Only problem is, it also creates a bounding box on the canvas of where the group used to be, with transform handles and everything (which was fun to poke to see what would happen). Before I go down a rabbit hole, I wanted to check in with the team about what the best way to select items would be and if defs should or should not ever be selected in this manner (I'm looking at you xml-tree-editor). Thanks for the advice, Best Regards, Martin Owens

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[Tracing] First steps/progress and some images
by Vinícius dos Santos Oliveira 16 Jun '13

16 Jun '13

Hello ppl, I just finished the task for week 2 from my proposed timeline<http://www.google-melange.com/gsoc/project/google/gsoc2013/vinipsmaker/48002>. This task was related to create a graph from an input image. This graph will be used by later steps in the Kopf/Lischinski algorithm. I'm attaching a zip file containing 4 input images and a set of output images representing the intermediate steps of the graph generation. There is a README.txt file inside this zip with further information. The next step of the algorithm is to improve this graph further more with three heuristics. I'll try to implement this step during the next two weeks. If you have any question, just ask and I'll be happy to answer your question. -- Vinícius dos Santos Oliveira https://about.me/vinipsmaker

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[Recolor] Re-painting the 'gimpcolorwheel'
by Arshdeep Singh 15 Jun '13

15 Jun '13

Hello devs, My current state of the wheel looks like this: [image: Inline image 1] I want a white center that blends into the respective colors towards the circumference. Here's a snippet from gimpcolorwheel.c *Function :* static void paint_ring (GimpColorWheel *wheel, cairo_t *cr) { ...} Snippet: *for (yy = 0; yy < height; yy++)* * {* * p = buf + yy * width;* * dy = -(yy - center_y);* * * * for (xx = 0; xx < width; xx++)* * {* * dx = xx - center_x;* * * * dist = dx * dx + dy * dy;* * if (dist < ((inner-1) * (inner-1)) || dist > ((outer+1) * (outer+1)))* * {* * *p++ = 0;* * continue;* * }* * * * angle = atan2 (dy, dx);* * if (angle < 0.0)* * angle += 2.0 * G_PI;* * * * hue = angle / (2.0 * G_PI);* * * * r = hue;* * g = 1.0;* * b = 1.0;* * hsv_to_rgb (&r, &g, &b);* * * * *p++ = (((int)floor (r * 255 + 0.5) << 16) |* * ((int)floor (g * 255 + 0.5) << 8) |* * (int)floor (b * 255 + 0.5));* * }* * }* * * this paints the colors of the wheel. Because we need to paint the center white, we have two options: ( I suppose ? ) One is to include a distance from the center that shall be the faintest white from the center We can choose this distance to be 20% of the radius allocated. This white coloration can be accommodated into the above snippet but what I fail to solve is how to add the transparency ? Should I calculate a separate 'buf' that is then OR-ed (overlaid) with the 'p' buffer to create that effect ? OR I can create a smaller circular arc and use radial gradient (white at center and transparent at circumference , radius again 20% ) and overlay onto the same surface used to draw the initial color wheel as shown in the picture above. I personally feel, the second option is easier because the first option would require to know how rgb changes when a certain degree of white is added to it. Your views are looked forward to. Thanks. -- Arshdeep Singh Third Year, Computer Engineering Delhi Technological University Ph: +91-9654115614 https://sites.google.com/site/adsingh1729/home

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[Recolor]
by Arshdeep Singh 15 Jun '13

15 Jun '13

Hello, This email is to declare my public branch for my Recolor Artwork Tool Project in GSoC 2013: https://code.launchpad.net/~moduli16/inkscape/recolor I am working on collecting the requisite information before finally diving into the coding. :) The first task is to build upon the current colorwheel used by inkscape (gimpcolorwheel.c) for extended utility functions for the purpose of my project. :) Thanks. -- Arshdeep Singh Third Year, Computer Engineering Delhi Technological University Ph: +91-9654115614 https://sites.google.com/site/adsingh1729/home

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