diff options
Diffstat (limited to '')
| -rwxr-xr-x | share/extensions/dimension.py | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/share/extensions/dimension.py b/share/extensions/dimension.py new file mode 100755 index 0000000..b452b82 --- /dev/null +++ b/share/extensions/dimension.py @@ -0,0 +1,159 @@ +#!/usr/bin/env python +# coding=utf-8 +# +# Copyright (C) 2007 Peter Lewerin, peter.lewerin@tele2.se +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +""" +An Inkscape effect for adding CAD style dimensions to selected objects +in a drawing. + +It uses the selection's bounding box, so if the bounding box has empty +space in the x- or y-direction (such as with some stars) the results +will look strange. Strokes might also overlap the edge of the +bounding box. + +The dimension arrows aren't measured: use the "Visualize Path/Measure +Path" effect to add measurements. + +This code contains snippets from existing effects in the Inkscape +extensions library, and marker data from markers.svg. +""" + +import inkex +from inkex import Group, Marker, PathElement +from inkex.localization import inkex_gettext as _ + +import pathmodifier + + +class Dimension(pathmodifier.PathModifier): + """Add dimensions as a path modifier""" + + def add_arguments(self, pars): + pars.add_argument( + "--xoffset", + type=float, + default=50.0, + help="x offset of the vertical dimension arrow", + ) + pars.add_argument( + "--yoffset", + type=float, + default=50.0, + help="y offset of the horizontal dimension arrow", + ) + pars.add_argument("--type", default="geometric", help="Bounding box type") + + def add_marker(self, name, rotate): + """Create a marker in the defs of the svg""" + marker = Marker() + marker.set("id", name) + marker.set("orient", "auto") + marker.set("refX", "0.0") + marker.set("refY", "0.0") + marker.set("style", "overflow:visible") + marker.set("inkscape:stockid", name) + self.svg.defs.append(marker) + + arrow = PathElement(d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z ") + if rotate: + arrow.set("transform", "scale(0.8) rotate(180) translate(12.5,0)") + else: + arrow.set("transform", "scale(0.8) translate(12.5,0)") + arrow.set( + "style", + "fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none", + ) + marker.append(arrow) + + def horz_line(self, y, xlat, bbox): + """Create a horzontal line""" + line = PathElement() + x1 = bbox.left - xlat[0] * self.options.xoffset + x2 = bbox.right + y1 = y - xlat[1] * self.options.yoffset + line.set("d", "M %f %f H %f" % (x1, y1, x2)) + return line + + def vert_line(self, x, xlat, bbox): + """Create a vertical line""" + line = PathElement() + x = x - xlat[0] * self.options.xoffset + y1 = bbox.top - xlat[1] * self.options.yoffset + y2 = bbox.bottom + line.set("d", "M %f %f V %f" % (x, y1, y2)) + return line + + def effect(self): + scale = self.svg.unittouu("1px") # convert to document units + self.options.xoffset *= scale + self.options.yoffset *= scale + + if not self.svg.selection: + raise inkex.AbortExtension(_("Please select an object")) + if self.options.type == "geometric": + bbox = self.svg.selection.bounding_box() + else: + bbox = self.svg.selection.first().bounding_box() + + layer = self.svg.get_current_layer() + + self.add_marker("Arrow1Lstart", False) + self.add_marker("Arrow1Lend", True) + + group = Group() + layer.append(group) + group.set("fill", "none") + group.set("stroke", "black") + + line = self.horz_line(bbox.top, [0, 1], bbox) + line.set("marker-start", "url(#Arrow1Lstart)") + line.set("marker-end", "url(#Arrow1Lend)") + line.set("stroke-width", str(scale)) + group.append(line) + + line = self.vert_line(bbox.left, [0, 2], bbox) + line.set("stroke-width", str(0.5 * scale)) + group.append(line) + + line = self.vert_line(bbox.right, [0, 2], bbox) + line.set("stroke-width", str(0.5 * scale)) + group.append(line) + + line = self.vert_line(bbox.left, [1, 0], bbox) + line.set("marker-start", "url(#Arrow1Lstart)") + line.set("marker-end", "url(#Arrow1Lend)") + line.set("stroke-width", str(scale)) + group.append(line) + + line = self.horz_line(bbox.top, [2, 0], bbox) + line.set("stroke-width", str(0.5 * scale)) + group.append(line) + + line = self.horz_line(bbox.bottom, [2, 0], bbox) + line.set("stroke-width", str(0.5 * scale)) + group.append(line) + + for node in self.svg.selection.values(): + group.append(node) + + layer.append(group) + return None + + +if __name__ == "__main__": + Dimension().run() |