smoother install font & depsgraph update

when we set a text, we don't want our manual depsgraph update, because
this would trigger another setting of the text, which would trigger the
manual depsgraph update, which would trigger another setting of the
text, which would trigger the manual depsgraph update, which will
eventually be too much.

So, we ignore the depsgraph update n-times, where "n = n-letters + 1".
worst side effect: might not update the text automatically in edge
cases.

__init__.py

@@ -326,31 +326,32 @@ class ABC3D_PT_Panel(bpy.types.Panel):
             icon = 'ERROR'
             layout.row().label(text='no fonts loaded yet')
 
+        layout.operator(f"{__name__}.install_font", text='Install new font')
         layout.operator(f"{__name__}.load_installed_fonts",
                         text="load installed fonts", icon=icon)
         layout.operator(f"{__name__}.open_asset_directory",
                         text="open asset directory", icon='FILEBROWSER')
 
 
-class ABC3D_PT_LoadFontPanel(bpy.types.Panel):
+# class ABC3D_PT_LoadFontPanel(bpy.types.Panel):
-    bl_label = "Install a new font"
+    # bl_label = "Install a new font"
-    bl_parent_id = "ABC3D_PT_Panel"
+    # bl_parent_id = "ABC3D_PT_Panel"
-    bl_category = "ABC3D"
+    # bl_category = "ABC3D"
-    bl_space_type = "VIEW_3D"
+    # bl_space_type = "VIEW_3D"
-    bl_region_type = "UI"
+    # bl_region_type = "UI"
 
-    def draw(self, context):
+    # def draw(self, context):
-        layout = self.layout
+        # layout = self.layout
-        wm = context.window_manager
+        # wm = context.window_manager
-        scene = context.scene
+        # scene = context.scene
 
-        abc3d_data = scene.abc3d_data
+        # abc3d_data = scene.abc3d_data
 
-        box = layout.box()
+        # box = layout.box()
-        box.row().label(text="1. Select fontfile")
+        # box.row().label(text="1. Select fontfile")
-        box.row().prop(context.scene.abc3d_data, "font_path")
+        # box.row().prop(context.scene.abc3d_data, "font_path")
-        box.row().label(text="2. Install it:")
+        # box.row().label(text="2. Install it:")
-        box.row().operator(f"{__name__}.install_font", text='Install new font')
+        # box.row().operator(f"{__name__}.install_font", text='Install new font')
 
 
 class ABC3D_PT_FontList(bpy.types.Panel):
@@ -666,7 +667,7 @@ class ABC3D_OT_InstallFont(bpy.types.Operator):
         description="Install a *.glb or *.gltf fontfile from disk",
         default="",
         maxlen=1024,
-        # update=font_path_update_callback,
+        update=font_path_update_callback,
         subtype="FILE_PATH")
 
     install_in_assets: bpy.props.BoolProperty(
@@ -682,7 +683,7 @@ class ABC3D_OT_InstallFont(bpy.types.Operator):
     def draw(self, context):
         abc3d_data = context.scene.abc3d_data
         layout = self.layout
-        # layout.row().prop(self, "font_path") # crashes on Mac OS?
+        layout.row().prop(self, "font_path")
         # layout.row().prop(abc3d_data, "font_path") # closes the stupid panel on Mac OS..
         layout.row().prop(self, "install_in_assets")
         if not self.install_in_assets and not self.load_into_memory:
@@ -698,30 +699,30 @@ class ABC3D_OT_InstallFont(bpy.types.Operator):
             layout.label(text="load the font data on demand.")
 
     def invoke(self, context, event):
-        abc3d_data = context.scene.abc3d_data
+        # self.font_path = butils.bpy_to_abspath(self.font_path)
-        self.font_path = abc3d_data.font_path
+        # if not os.path.exists(self.font_path):
-        if not os.path.exists(self.font_path):
+            # bpy.app.timers.register(lambda: butils.ShowMessageBox(
-            bpy.app.timers.register(lambda: butils.ShowMessageBox(
+                # title=f"{__name__} Warning",
-                title=f"{__name__} Warning",
+                # icon="ERROR",
-                icon="ERROR",
+                # message=[
-                message=[
+                    # f"We believe the font path ({self.font_path}) does not exist.",
-                    f"We believe the font path ({self.font_path}) does not exist.",
+                    # f"Did you select your fontfile in the field above the 'Install new font'-button?",
-                    f"Did you select your fontfile in the field above the 'Install new font'-button?",
+                # ],
-                ],
+            # ), first_interval=0.1)
-            ), first_interval=0.1)
         return context.window_manager.invoke_props_dialog(self)
 
     def execute(self, context):
         scene = bpy.context.scene
 
         abc3d_data = context.scene.abc3d_data
-        if not os.path.exists(self.font_path):
+        font_path = butils.bpy_to_abspath(self.font_path)
+        if not os.path.exists(font_path):
             butils.ShowMessageBox(
                 title=f"{__name__} Warning",
                 icon="ERROR",
                 message=[
                     f"Could not install font.",
-                    f"We believe the font path ({self.font_path}) does not exist.",
+                    f"We believe the font path ({font_path}) does not exist.",
                     f"If this is an error, please let us know.",
                 ],
             )
@@ -729,11 +730,11 @@ class ABC3D_OT_InstallFont(bpy.types.Operator):
 
         if self.install_in_assets:
             preferences = getPreferences(context)
-            filename = os.path.basename(self.font_path)
+            filename = os.path.basename(font_path)
             target = os.path.join(preferences.assets_dir, "fonts", filename)
             import shutil
             os.makedirs(os.path.dirname(target), exist_ok=True)
-            shutil.copyfile(self.font_path, target)
+            shutil.copyfile(font_path, target)
             # def register_load(target, load=False):
             # print(f"registering installed fonts")
             # bpy.app.timers.register(lambda: register_load(target, self.load_into_memory), first_interval=5)
@@ -742,9 +743,9 @@ class ABC3D_OT_InstallFont(bpy.types.Operator):
                 butils.load_font_from_filepath(target)
             butils.update_available_fonts()
         else:
-            butils.register_font_from_filepath(self.font_path)
+            butils.register_font_from_filepath(font_path)
             if self.load_into_memory:
-                butils.load_font_from_filepath(self.font_path)
+                butils.load_font_from_filepath(font_path)
 
         return {'FINISHED'}
 
@@ -1507,7 +1508,7 @@ classes = (
     ABC3D_UL_fonts,
     ABC3D_UL_texts,
     ABC3D_PT_Panel,
-    ABC3D_PT_LoadFontPanel,
+    # ABC3D_PT_LoadFontPanel,
     ABC3D_PT_FontList,
     ABC3D_PT_TextPlacement,
     ABC3D_PT_TextManagement,
@@ -1585,7 +1586,7 @@ def load_used_glyphs():
                                       [f"Font {t.font_name} is there,",
                                        f"but the FontFace {t.face_name} is missing,",
                                        "Do you have it installed?"])
-        if len(a["maybe"]) > 0:
+        elif len(a["maybe"]) > 0:
             for fp in a["filepaths"]:
                 butils.load_font_from_filepath(fp, a["maybe"])
 
@@ -1610,20 +1611,25 @@ def on_frame_changed(self, dummy):
         # TODO PERFORMANCE: only on demand
         butils.set_text_on_curve(t)
 
-
 @persistent
 def on_depsgraph_update(scene, depsgraph):
-    for u in depsgraph.updates:
+    if not bpy.context.mode.startswith("EDIT"):
-        if f"{utils.prefix()}_linked_textobject" in u.id.keys() \
+        for u in depsgraph.updates:
-                and f"{utils.prefix()}_type" in u.id.keys() \
+            if f"{utils.prefix()}_linked_textobject" in u.id.keys() \
-                and u.id[f"{utils.prefix()}_type"] == 'textobject':
+                    and f"{utils.prefix()}_type" in u.id.keys() \
-            linked_textobject = u.id[f"{utils.prefix()}_linked_textobject"]
+                    and u.id[f"{utils.prefix()}_type"] == 'textobject':
-            if u.is_updated_geometry and len(scene.abc3d_data.available_texts) > linked_textobject and not "prevent_recursion" in u.id:
+                linked_textobject = u.id[f"{utils.prefix()}_linked_textobject"]
-                u.id["prevent_recursion"] = True
+                if u.is_updated_geometry and len(scene.abc3d_data.available_texts) > linked_textobject:
-                butils.set_text_on_curve(
+                    def later():
-                    scene.abc3d_data.available_texts[linked_textobject])
+                        if not "lock_depsgraph_update_ntimes" in scene.abc3d_data \
-            elif "prevent_recursion" in u.id.keys():
+                                or scene.abc3d_data["lock_depsgraph_update_ntimes"] == 0:
-                del u.id["prevent_recursion"]
+                            print("******* not yet")
+                            butils.set_text_on_curve(
+                                scene.abc3d_data.available_texts[linked_textobject])
+                        elif scene.abc3d_data["lock_depsgraph_update_ntimes"] > 0:
+                            scene.abc3d_data['lock_depsgraph_update_ntimes'] -= 1
+                    butils.run_in_main_thread(later)
+
 
 
 def register():

bimport.py

@@ -424,7 +424,13 @@ class ImportGLTF2(Operator, ConvertGLTF2_Base, ImportHelper):
             elapsed_s = "{:.2f}s".format(time.time() - start_time)
             print("font import gltf finished in " + elapsed_s)
 
-            gltf.log.removeHandler(gltf.log_handler)
+            # acrobatics to not break on MacOS
+            if hasattr(gltf, "log_handler"):
+                if hasattr(gltf.log, "removeHandler"):
+                    gltf.log.removeHandler(gltf.log_handler)
+                elif hasattr(gltf.log, "logger"):
+                    if hasattr(gltf.log.logger, "removeHandler"):
+                        gltf.log.logger.removeHandler(gltf.log_handler)
 
             return {'FINISHED'}
 

butils.py

@@ -392,6 +392,9 @@ def move_in_fontcollection(obj, fontcollection, allow_duplicates=False):
 
     return obj
 
+def bpy_to_abspath(blender_path):
+    return os.path.realpath(bpy.path.abspath(blender_path))
+
 def register_font_from_filepath(filepath):
     from .bimport import get_font_faces_in_file
 
@@ -857,6 +860,8 @@ def set_text_on_curve(text_properties, recursive=True):
         mom[f"{utils.prefix()}_translation"] = text_properties.translation
         bpy.context.view_layer.objects.active = mom
         bpy.ops.object.parent_set(type='OBJECT')
+        bpy.context.scene.abc3d_data["lock_depsgraph_update_ntimes"] = len(bpy.context.selected_objects)
+        mom["lock_depsgraph_update_ntimes"] = len(bpy.context.selected_objects)
 
     # endtime = time.perf_counter_ns()
     # elapsedtime = endtime - starttime

common/utils.py

@@ -68,6 +68,10 @@ def open_file_browser(directory):
             # xdg-open *should* be supported by recent Gnome, KDE, Xfce
 
 
+def printerr(*args, **kwargs):
+    print(*args, file=sys.stderr, **kwargs)
+
+
 # # Evaluate a bezier curve for the parameter 0<=t<=1 along its length
 # def evaluateBezierPoint(p1, h1, h2, p2, t):
     # return ((1 - t)**3) * p1 + (3 * t * (1 - t)**2) * h1 + (3 * (t**2) * (1 - t)) * h2 + (t**3) * p2