Ifc Text - drop down menu to switch font size

Added drop down menu to Ifc Text section in object properties where you can change text's size and it will automatically change it in `EPset_Annotation.Classes`. You can also preview it in viewport and it will write in IFC only after you finish editing.

Still need to investigate `annotation.Annotator.resize_text(context.active_object)` in `refreshFontSize`.

src/blenderbim/blenderbim/bim/module/drawing/data.py

@@ -125,6 +125,14 @@ class SchedulesData:
         return len([d for d in tool.Ifc.get().by_type("IfcDocumentInformation") if d.Scope == "SCHEDULE"])
 
 
+FONT_SIZES = {
+    'small':   1.8,
+    'regular': 2.5,
+    'large':   3.5,
+    'header':  5.0,
+    'title':   7.0,
+}
+
 class DecoratorData:
     # stores 1 type of data per object
     data = {}
@@ -194,24 +202,19 @@ class DecoratorData:
         if not element:
             return
         
-        classes = ifcopenshell.util.element.get_pset(element, "EPset_Annotation", "Classes")
-        
-        font_sizes = {
-            'small':   1.8,
-            'regular': 2.5,
-            'large':   3.5,
-            'header':  5,
-            'title':   7,
-        }
-
-        # use `regular` as default
-        if classes:        
-            tags = classes.split()
-            # prioritize smaller font sizes just like in svg
-            font_size_type = next((font_size_type for font_size_type in font_sizes if font_size_type in tags), 'regular')
+        if obj.BIMTextProperties.is_editing:
+            font_size = float(obj.BIMTextProperties.font_size)
         else:
-            font_size_type = 'regular'
+            classes = ifcopenshell.util.element.get_pset(element, "EPset_Annotation", "Classes")
+            
+            # use `regular` as default
+            if classes:        
+                classes_split = classes.split()
+                # prioritize smaller font sizes just like in svg
+                font_size_type = next((font_size_type for font_size_type in FONT_SIZES if font_size_type in classes_split), 'regular')
+            else:
+                font_size_type = 'regular'
 
-        font_size = font_sizes[font_size_type]
+            font_size = FONT_SIZES[font_size_type]
         cls.data[obj.name] = font_size
         return font_size

src/blenderbim/blenderbim/bim/module/drawing/operator.py

@@ -39,6 +39,7 @@ import blenderbim.bim.module.drawing.annotation as annotation
 import blenderbim.bim.module.drawing.sheeter as sheeter
 import blenderbim.bim.module.drawing.scheduler as scheduler
 import blenderbim.bim.module.drawing.helper as helper
+from blenderbim.bim.module.drawing.data import DecoratorData
 import blenderbim.bim.export_ifc
 from lxml import etree
 from mathutils import Vector
@@ -1362,6 +1363,14 @@ class DisableEditingText(bpy.types.Operator, Operator):
     def _execute(self, context):
         core.disable_editing_text(tool.Drawing, obj=context.active_object)
 
+        # force update this object's font size for viewport display
+        DecoratorData.data.pop(context.object.name, None)
+
+        # TODO: just needed some way to trigger UI update
+        # probably there is more proper way to do it
+        props = context.object.BIMTextProperties
+        props.font_size = props.font_size
+
 
 class EditAssignedProduct(bpy.types.Operator, Operator):
     bl_idname = "bim.edit_assigned_product"

src/blenderbim/blenderbim/bim/module/drawing/prop.py

@@ -25,7 +25,7 @@ import blenderbim.tool as tool
 import blenderbim.core.drawing as core
 import blenderbim.bim.module.drawing.annotation as annotation
 import blenderbim.bim.module.drawing.decoration as decoration
-from blenderbim.bim.module.drawing.data import DrawingsData
+from blenderbim.bim.module.drawing.data import DrawingsData, DecoratorData
 from pathlib import Path
 from blenderbim.bim.prop import Attribute, StrProperty
 from bpy.types import PropertyGroup
@@ -228,10 +228,6 @@ def getVectorStyles(self, context):
     return vector_styles_enum
 
 
-def refreshFontSize(self, context):
-    annotation.Annotator.resize_text(context.active_object)
-
-
 class Variable(PropertyGroup):
     name: StringProperty(name="Name")
     prop_key: StringProperty(name="Property Key")
@@ -408,6 +404,16 @@ class BIMTextProperties(PropertyGroup):
 
     def get_box_alignment(self):
         return self.get("box_alignment", DEFAULT_BOX_ALIGNMENT)
+    
+    def refreshFontSize(self, context):
+        # force update this object's font size for viewport display
+        DecoratorData.data.pop(context.object.name, None)
+        
+        # TODO: line seems outdated and currently is just throwing error. remove?
+        # File "\blenderbim\bim\module\drawing\annotation.py", line 63, in resize_text
+        #     font_size *= float(text_obj.data.BIMTextProperties.font_size)
+        # AttributeError: 'NoneType' object has no attribute 'BIMTextProperties'
+        # annotation.Annotator.resize_text(context.active_object)
 
     is_editing: BoolProperty(name="Is Editing", default=False)
     attributes: CollectionProperty(name="Attributes", type=Attribute)

src/blenderbim/blenderbim/bim/module/drawing/ui.py

@@ -355,8 +355,7 @@ class BIM_PT_text(Panel):
             row = self.layout.row(align=True)
             row.prop(props, 'font_size')
 
-            # a bit hacky way to align box alignment widget
-            rows = [self.layout.row(align=True) for i in range(3)]
+            rows = []
             for i in range(9):
                 if i % 3 == 0:
                     split = rows[i//3].split(factor=0.1, align=True)

src/blenderbim/blenderbim/core/drawing.py

@@ -33,6 +33,7 @@ def edit_text(ifc, drawing, obj=None):
         attributes=drawing.export_text_literal_attributes(obj),
     )
     drawing.update_text_value(obj)
+    drawing.update_text_size_pset(obj)
     drawing.disable_editing_text(obj)
 
 

src/blenderbim/blenderbim/tool/drawing.py

@@ -34,6 +34,8 @@ import blenderbim.bim.module.drawing.sheeter as sheeter
 import blenderbim.bim.module.drawing.scheduler as scheduler
 import blenderbim.bim.module.drawing.annotation as annotation
 import blenderbim.bim.module.drawing.helper as helper
+
+from blenderbim.bim.module.drawing.data import FONT_SIZES, DecoratorData
 from blenderbim.bim.module.drawing.prop import get_diagram_scales, BOX_ALIGNMENT_POSITIONS
 
 
@@ -463,6 +465,9 @@ class Drawing(blenderbim.core.tool.Drawing):
         box_alignment_mask[BOX_ALIGNMENT_POSITIONS.index(position_string)] = True
         props.box_alignment = box_alignment_mask
 
+        font_size = DecoratorData.get_ifc_text_font_size(obj)
+        props.font_size = str(font_size)
+
     @classmethod
     def import_assigned_product(cls, obj):
         element = tool.Ifc.get_entity(obj)
@@ -525,16 +530,55 @@ class Drawing(blenderbim.core.tool.Drawing):
 
     @classmethod
     def update_text_value(cls, obj):
-        element = cls.get_text_literal(obj)
-        if not element:
+        props = obj.BIMTextProperties
+        
+        ifc_literal = cls.get_text_literal(obj)
+        if not ifc_literal:
             return
-        value = element.Literal
+        value = ifc_literal.Literal
         product = cls.get_assigned_product(tool.Ifc.get_entity(obj))
         if product:
             variables = {}
             for variable in re.findall("{{.*?}}", value):
                 value = value.replace(variable, str(ifcopenshell.util.selector.get_element_value(product, variable[2:-2]) or ""))
-        obj.BIMTextProperties.value = value
+        props.value = value
+
+
+    @classmethod
+    def update_text_size_pset(cls, obj):
+        """ updates pset `EPset_Annotation.Classes` value
+        based on current font size from `obj.BIMTextProperties.font_size`
+        """
+        props = obj.BIMTextProperties
+        element = tool.Ifc.get_entity(obj)
+        # updating text font size in EPset_Annotation.Classes
+        font_size = float(props.font_size)
+        font_size_str = next((key for key in FONT_SIZES if FONT_SIZES[key] == font_size), None)
+        classes = ifcopenshell.util.element.get_pset(element, "EPset_Annotation", "Classes")
+        classes_split = classes.split() if classes else []
+
+        different_font_sizes = [c for c in classes_split if c in FONT_SIZES and c != font_size_str]
+
+        # if there are different font sizes in classes already
+        # or if the current font size is not present in classes 
+        # (except regular because it's default)
+        # then we do need to change pset value in ifc
+        if different_font_sizes \
+            or (font_size_str not in classes_split and font_size_str != 'regular'):
+            classes_split = [c for c in classes_split if c not in FONT_SIZES] + [font_size_str]
+            classes = ' '.join(classes_split)
+
+            ifc_file = tool.Ifc.get()
+            pset = tool.Pset.get_element_pset(element, "EPset_Annotation")
+            if not pset:
+                pset = ifcopenshell.api.run("pset.add_pset", ifc_file, product=element, name="EPset_Annotation")
+            ifcopenshell.api.run(
+                "pset.edit_pset",
+                ifc_file,
+                pset=pset,
+                properties={"Classes": classes},
+            )
+
 
     # TODO below this point is highly experimental prototype code with no tests