Sew Stack first steps (#3133)

* handle more recursive cases

* scaffolding for stitch layers

* scaffolding for SewStack

* always use DotDict when parsing json params

* add DefaultDotDict + DotDict fixes

* first working SewStack (no UI yet)

* ignore inkstitch_debug.log and .svg

* refactor

* early WIP: property grid display temporarily in stitch plan preview

* start of sew stack editor extension

* add layer properties panel and splitter

* spacing and better icon

* handle checkbox

* add layer action buttons

* show selected property help text in an HtmlWindow

* rename

* rephrase help text for tolerance

* refactor into separate file

* simplify structure

* better property type handling

* add randomization button

* add random seed re-roll button

* simulator preview

* update preview in a few more cases

* always DotDict

* avoid ridiculously slow simulations

* preview selected layer or all layers

* edit multiple objects and save only modified properties into the SVG

* better preview handling

* add reverse and jitter

* add stitch path jitter

* fix types

* fix random shuffle button

* fixes

* fix repeats

* type hinting to please pycharm

* show layer description

* avoid exception in properties with multiple values

* fix typing

* fix new layer

* draw a box around property grid and help box

* confirm before closing

* rename properties and fix seed

* fix close/cancel logic

* add buttons to undo changes and reset to default value

* set not modified if default is original setting

* fix invisible icon

* more space for properties

* fix random properties

* better regulation of simulator rendering speed

* Fixed timer being passed a float

* fix get_json_param() default handling

* fix tests

* add checkbox for sew stack only

* fix property help

* adjustable stitch layer editor help box size, with persistence

* repeat exact stitches

* "fix" style

* adjust for new next_element stuff

---------

Co-authored-by: CapellanCitizen <thecapellancitizen@gmail.com>

2 files changed, 34 insertions, 12 deletions

diff --git a/lib/elements/element.py b/lib/elements/element.py
index 0846b7ab..ea2d5d6b 100644
--- a/lib/elements/element.py
+++ b/lib/elements/element.py
@@ -2,6 +2,7 @@
 #
 # Copyright (c) 2010 Authors
 # Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+import json
 import sys
 from contextlib import contextmanager
 from copy import deepcopy
@@ -25,7 +26,7 @@ from ..stitch_plan.lock_stitch import (LOCK_DEFAULTS, AbsoluteLock, CustomLock,
 from ..svg import (PIXELS_PER_MM, apply_transforms, convert_length,
                    get_node_transform)
 from ..svg.tags import INKSCAPE_LABEL, INKSTITCH_ATTRIBS
-from ..utils import Point, cache
+from ..utils import DotDict, Point, cache
 from ..utils.cache import (CacheKeyGenerator, get_stitch_plan_cache,
                            is_cache_disabled)
 
@@ -159,6 +160,20 @@ class EmbroideryElement(object):
             return [int(default)]
         return params
 
+    def get_json_param(self, param, default=None):
+        json_value = self.get_param(param, None)
+        try:
+            return json.loads(json_value, object_hook=DotDict)
+        except (json.JSONDecodeError, TypeError):
+            if default is None:
+                return DotDict()
+            else:
+                return DotDict(default)
+
+    def set_json_param(self, param, value):
+        json_value = json.dumps(value)
+        self.set_param(param, json_value)
+
     def set_param(self, name, value):
         # Sets a param on the node backing this element. Used by params dialog.
         # After calling, this element is invalid due to caching and must be re-created to use the new value.
diff --git a/lib/elements/utils.py b/lib/elements/utils.py
index 09d24935..a3de62e9 100644
--- a/lib/elements/utils.py
+++ b/lib/elements/utils.py
@@ -37,18 +37,25 @@ def node_to_elements(node, clone_to_element=False) -> List[EmbroideryElement]:
         return [MarkerObject(node)]
 
     elif node.tag in EMBROIDERABLE_TAGS or is_clone(node):
-        element = EmbroideryElement(node)
-
         elements = []
-        if element.get_style("fill", "black") and not element.get_style('fill-opacity', 1) == "0":
-            elements.append(FillStitch(node))
-        if element.get_style("stroke"):
-            if element.get_boolean_param("satin_column") and len(element.path) > 1:
-                elements.append(SatinColumn(node))
-            elif not is_command(element.node):
-                elements.append(Stroke(node))
-        if element.get_boolean_param("stroke_first", False):
-            elements.reverse()
+
+        from ..sew_stack import SewStack
+        sew_stack = SewStack(node)
+
+        if not sew_stack.sew_stack_only:
+            element = EmbroideryElement(node)
+            if element.get_style("fill", "black") and not element.get_style('fill-opacity', 1) == "0":
+                elements.append(FillStitch(node))
+            if element.get_style("stroke"):
+                if element.get_boolean_param("satin_column") and len(element.path) > 1:
+                    elements.append(SatinColumn(node))
+                elif not is_command(element.node):
+                    elements.append(Stroke(node))
+            if element.get_boolean_param("stroke_first", False):
+                elements.reverse()
+
+        elements.append(sew_stack)
+
         return elements
 
     elif node.tag == SVG_IMAGE_TAG: