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>

3 files changed, 49 insertions, 8 deletions

diff --git a/lib/utils/dotdict.py b/lib/utils/dotdict.py
index 12cf6e79..47f56623 100644
--- a/lib/utils/dotdict.py
+++ b/lib/utils/dotdict.py
@@ -3,6 +3,7 @@
 # Copyright (c) 2010 Authors
 # Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
 
+
 class DotDict(dict):
     """A dict subclass that allows accessing methods using dot notation.
 
@@ -10,24 +11,33 @@ class DotDict(dict):
     """
 
     def __init__(self, *args, **kwargs):
-        super(DotDict, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self._dotdictify()
 
     def update(self, *args, **kwargs):
-        super(DotDict, self).update(*args, **kwargs)
+        super().update(*args, **kwargs)
         self._dotdictify()
 
     def _dotdictify(self):
         for k, v in self.items():
-            if isinstance(v, dict):
+            if isinstance(v, dict) and not isinstance(v, DotDict):
                 self[k] = DotDict(v)
 
-    __setattr__ = dict.__setitem__
     __delattr__ = dict.__delitem__
 
+    def __setattr__(self, name, value):
+        if name.startswith('_'):
+            super().__setattr__(name, value)
+        else:
+            if isinstance(value, dict) and not isinstance(value, DotDict):
+                value = DotDict(value)
+
+            super().__setitem__(name, value)
+
     def __getattr__(self, name):
         if name.startswith('_'):
-            raise AttributeError("'DotDict' object has no attribute '%s'" % name)
+            raise AttributeError(
+                f"'{self.__class__.__name__}' object has no attribute '{name}'")
 
         if name in self:
             return self.__getitem__(name)
@@ -37,5 +47,5 @@ class DotDict(dict):
             return new_dict
 
     def __repr__(self):
-        super_repr = super(DotDict, self).__repr__()
-        return "DotDict(%s)" % super_repr
+        super_repr = super().__repr__()
+        return f"{self.__class__.__name__}({super_repr})"
diff --git a/lib/utils/icons.py b/lib/utils/icons.py
new file mode 100644
index 00000000..492d88ce
--- /dev/null
+++ b/lib/utils/icons.py
@@ -0,0 +1,29 @@
+import os
+
+import wx
+
+from .paths import get_resource_dir
+
+
+def is_dark_theme():
+    return wx.SystemSettings().GetAppearance().IsDark()
+
+
+def load_icon(icon_name, window=None, width=None, height=None):
+    if window is None and not (width and height):
+        raise ValueError("load_icon(): must pass a window or width and height")
+
+    icon = wx.Image(os.path.join(get_resource_dir("icons"), f"{icon_name}.png"))
+
+    if not (width and height):
+        render = wx.RendererNative.Get()
+        width = height = render.GetHeaderButtonHeight(window)
+    icon.Rescale(width, height, wx.IMAGE_QUALITY_HIGH)
+
+    if is_dark_theme():
+        # only way I've found to get a negative image
+        data = icon.GetDataBuffer()
+        for i in range(len(data)):
+            data[i] = 255 - data[i]
+
+    return icon.ConvertToBitmap()
diff --git a/lib/utils/settings.py b/lib/utils/settings.py
index e2287862..23e22b61 100644
--- a/lib/utils/settings.py
+++ b/lib/utils/settings.py
@@ -27,7 +27,9 @@ DEFAULT_SETTINGS = {
     "color_change_button_status": False,
     "toggle_page_button_status": True,
     # apply palette
-    "last_applied_palette": ""
+    "last_applied_palette": "",
+    # sew stack editor
+    "stitch_layer_editor_sash_position": -200,
 }