Improve satin guided ripple stitch and add stitch grid first option (#3436)

* ripple stitch: add stitch grid first option
* introduce an anchor line to fine tune satin guided ripples

1 files changed, 26 insertions, 0 deletions

diff --git a/lib/extensions/selection_to_anchor_line.py b/lib/extensions/selection_to_anchor_line.py
new file mode 100644
index 00000000..fe9442f1
--- /dev/null
+++ b/lib/extensions/selection_to_anchor_line.py
@@ -0,0 +1,26 @@
+# Authors: see git history
+#
+# Copyright (c) 2021 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
+import inkex
+
+from ..i18n import _
+from ..marker import set_marker
+from ..svg.tags import EMBROIDERABLE_TAGS
+from .base import InkstitchExtension
+
+
+class SelectionToAnchorLine(InkstitchExtension):
+
+    def effect(self):
+        if not self.get_elements():
+            return
+
+        if not self.svg.selected:
+            inkex.errormsg(_("Please select at least one object to be marked as a anchor line."))
+            return
+
+        for pattern in self.get_nodes():
+            if pattern.tag in EMBROIDERABLE_TAGS:
+                set_marker(pattern, 'start', 'anchor-line')