- improvements in Importing SVG as Gerber - added an automatic source generation (it is not infallible)

- a hack to import correctly the QRCode exported as SVG from FlatCAM

FlatCAMApp.py

@@ -10097,6 +10097,11 @@ class App(QtCore.QObject):
         file_string = StringIO(obj.source_file)
         time_string = "{:%A, %d %B %Y at %H:%M}".format(datetime.now())
 
+        if file_string.getvalue() == '':
+            self.inform.emit('[ERROR_NOTCL] %s' %
+                             _("Save cancelled because source file is empty. Try to export the Gerber file."))
+            return 'fail'
+
         try:
             with open(filename, 'w') as file:
                 file.writelines('G04*\n')
@@ -10468,11 +10473,10 @@ class App(QtCore.QObject):
         if geo_type is None or geo_type == "geometry":
             obj_type = "geometry"
         elif geo_type == "gerber":
-            obj_type = geo_type
+            obj_type = "gerber"
         else:
             self.inform.emit('[ERROR_NOTCL] %s' %
-                             _("Not supported type is picked as parameter. "
-                               "Only Geometry and Gerber are supported"))
+                             _("Not supported type is picked as parameter. Only Geometry and Gerber are supported"))
             return
 
         units = self.defaults['units'].upper()
@@ -10480,6 +10484,7 @@ class App(QtCore.QObject):
         def obj_init(geo_obj, app_obj):
             geo_obj.import_svg(filename, obj_type, units=units)
             geo_obj.multigeo = False
+            geo_obj.source_file = self.export_gerber(obj_name=name, filename=None, local_use=geo_obj, use_thread=False)
 
         with self.proc_container.new(_("Importing SVG")) as proc:
 

README.md

@@ -12,6 +12,8 @@ CAD program, and create G-Code for Isolation routing.
 2.12.2019
 
 - fixed issue #343; updated the Image Tool
+- improvements in Importing SVG as Gerber - added an automatic source generation (it is not infallible)
+- a hack to import correctly the QRCode exported as SVG from FlatCAM
 
 28.11.2019
 

camlib.py

@@ -1016,17 +1016,14 @@ class Geometry(object):
 
         # Add to object
         if self.solid_geometry is None:
-            self.solid_geometry = []
+            self.solid_geometry = list()
 
         if type(self.solid_geometry) is list:
-            # self.solid_geometry.append(cascaded_union(geos))
             if type(geos) is list:
                 self.solid_geometry += geos
             else:
                 self.solid_geometry.append(geos)
         else:  # It's shapely geometry
-            # self.solid_geometry = cascaded_union([self.solid_geometry,
-            #                                       cascaded_union(geos)])
             self.solid_geometry = [self.solid_geometry, geos]
 
         # flatten the self.solid_geometry list for import_svg() to import SVG as Gerber
@@ -1034,7 +1031,7 @@ class Geometry(object):
 
         geos_text = getsvgtext(svg_root, object_type, units=units)
         if geos_text is not None:
-            geos_text_f = []
+            geos_text_f = list()
             if flip:
                 # Change origin to bottom left
                 for i in geos_text:

flatcamParsers/ParseGerber.py

@@ -9,13 +9,15 @@ import traceback
 from copy import deepcopy
 import sys
 
-from shapely.ops import cascaded_union
+from shapely.ops import cascaded_union, unary_union
 from shapely.geometry import Polygon, MultiPolygon, LineString, Point
 import shapely.affinity as affinity
 from shapely.geometry import box as shply_box
 
-import FlatCAMTranslation as fcTranslate
+from lxml import etree as ET
+from flatcamParsers.ParseSVG import *
 
+import FlatCAMTranslation as fcTranslate
 import gettext
 import builtins
 
@@ -784,7 +786,7 @@ class Gerber(Geometry):
                         self.apertures['0'] = {}
                         self.apertures['0']['type'] = 'REG'
                         self.apertures['0']['size'] = 0.0
-                        self.apertures['0']['geometry'] = []
+                        self.apertures['0']['geometry'] = list()
 
                     # if D02 happened before G37 we now have a path with 1 element only; we have to add the current
                     # geo to the poly_buffer otherwise we loose it
@@ -1635,6 +1637,87 @@ class Gerber(Geometry):
         self.scale(factor, factor)
         return factor
 
+    def import_svg(self, filename, object_type='gerber', flip=True, units='MM'):
+        """
+        Imports shapes from an SVG file into the object's geometry.
+
+        :param filename: Path to the SVG file.
+        :type filename: str
+        :param object_type: parameter passed further along
+        :param flip: Flip the vertically.
+        :type flip: bool
+        :param units: FlatCAM units
+        :return: None
+        """
+
+        log.debug("flatcamParsers.ParseGerber.Gerber.import_svg()")
+
+        # Parse into list of shapely objects
+        svg_tree = ET.parse(filename)
+        svg_root = svg_tree.getroot()
+
+        # Change origin to bottom left
+        # h = float(svg_root.get('height'))
+        # w = float(svg_root.get('width'))
+        h = svgparselength(svg_root.get('height'))[0]  # TODO: No units support yet
+
+        geos = getsvggeo(svg_root, 'gerber')
+        if flip:
+            geos = [translate(scale(g, 1.0, -1.0, origin=(0, 0)), yoff=h) for g in geos]
+
+        # Add to object
+        if self.solid_geometry is None:
+            self.solid_geometry = list()
+
+        # if type(self.solid_geometry) == list:
+        #     if type(geos) == list:
+        #         self.solid_geometry += geos
+        #     else:
+        #         self.solid_geometry.append(geos)
+        # else:  # It's shapely geometry
+        #     self.solid_geometry = [self.solid_geometry, geos]
+
+        if type(geos) == list:
+            # HACK for importing QRCODE exported by FlatCAM
+            if len(geos) == 1:
+                geo_qrcode = list()
+                geo_qrcode.append(Polygon(geos[0].exterior))
+                for i_el in geos[0].interiors:
+                    geo_qrcode.append(Polygon(i_el).buffer(0))
+                for poly in geo_qrcode:
+                    geos.append(poly)
+
+            if type(self.solid_geometry) == list:
+                self.solid_geometry += geos
+            else:
+                geos.append(self.solid_geometry)
+                self.solid_geometry = geos
+        else:
+            if type(self.solid_geometry) == list:
+                self.solid_geometry.append(geos)
+            else:
+                self.solid_geometry = [self.solid_geometry, geos]
+
+        # flatten the self.solid_geometry list for import_svg() to import SVG as Gerber
+        self.solid_geometry = list(self.flatten_list(self.solid_geometry))
+
+        try:
+            __ = iter(self.solid_geometry)
+        except TypeError:
+            self.solid_geometry = [self.solid_geometry]
+
+        if '0' not in self.apertures:
+            self.apertures['0'] = dict()
+            self.apertures['0']['type'] = 'REG'
+            self.apertures['0']['size'] = 0.0
+            self.apertures['0']['geometry'] = list()
+
+        for pol in self.solid_geometry:
+            new_el = dict()
+            new_el['solid'] = pol
+            new_el['follow'] = pol.exterior
+            self.apertures['0']['geometry'].append(deepcopy(new_el))
+
     def scale(self, xfactor, yfactor=None, point=None):
         """
         Scales the objects' geometry on the XY plane by a given factor.

flatcamParsers/ParseSVG.py

@@ -141,7 +141,6 @@ def path2shapely(path, object_type, res=1.0):
                     coords.append(line.coords[1])
                 geo_element = Polygon(coords)
         geometry.append(geo_element)
-
     return geometry
 
 
@@ -306,7 +305,7 @@ def getsvggeo(node, object_type, root=None):
         root = node
 
     kind = re.search('(?:\{.*\})?(.*)$', node.tag).group(1)
-    geo = []
+    geo = list()
 
     # Recurse
     if len(node) > 0: