New basic UI to view tasks in an IFC file

src/ifcblenderexport/blenderbim/bim/module/sequence/__init__.py

@@ -0,0 +1,19 @@
+import bpy
+from . import ui, prop, operator
+
+classes = (
+    operator.LoadTasks,
+    operator.DisableTaskEditingUI,
+    prop.Task,
+    prop.BIMTaskProperties,
+    ui.BIM_PT_tasks,
+    ui.BIM_UL_tasks,
+)
+
+
+def register():
+    bpy.types.Scene.BIMTaskProperties = bpy.props.PointerProperty(type=prop.BIMTaskProperties)
+
+
+def unregister():
+    del bpy.types.Scene.BIMTaskProperties

src/ifcblenderexport/blenderbim/bim/module/sequence/data.py

@@ -0,0 +1,18 @@
+from blenderbim.bim.ifc import IfcStore
+
+
+class Data:
+    is_loaded = False
+    tasks = {}
+
+    @classmethod
+    def purge(cls):
+        cls.is_loaded = False
+        cls.tasks = {}
+
+    @classmethod
+    def load(cls):
+        cls.tasks = {}
+        for task in IfcStore.get_file().by_type("IfcTask"):
+            cls.tasks[task.id()] = {"Name": task.Name, "Identification": task.Identification or ""}
+        cls.is_loaded=True

src/ifcblenderexport/blenderbim/bim/module/sequence/operator.py

@@ -0,0 +1,29 @@
+import bpy
+from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.module.sequence.data import Data
+
+
+class LoadTasks(bpy.types.Operator):
+    bl_idname = "bim.load_tasks"
+    bl_label = "Load Tasks"
+
+    def execute(self, context):
+        props = context.scene.BIMTaskProperties
+        while len(props.tasks) > 0:
+            props.tasks.remove(0)
+        for ifc_definition_id, task in Data.tasks.items():
+            new = props.tasks.add()
+            new.ifc_definition_id = ifc_definition_id
+            new.name = task["Name"]
+            new.identification = task["Identification"]
+        props.is_editing = True
+        return {"FINISHED"}
+
+
+class DisableTaskEditingUI(bpy.types.Operator):
+    bl_idname = "bim.disable_task_editing_ui"
+    bl_label = "Disable Task Editing UI"
+
+    def execute(self, context):
+        context.scene.BIMTaskProperties.is_editing = False
+        return {"FINISHED"}

src/ifcblenderexport/blenderbim/bim/module/sequence/prop.py

@@ -0,0 +1,26 @@
+import bpy
+from blenderbim.bim.prop import StrProperty, Attribute
+from blenderbim.bim.module.sequence.data import Data
+from bpy.types import PropertyGroup
+from bpy.props import (
+    PointerProperty,
+    StringProperty,
+    EnumProperty,
+    BoolProperty,
+    IntProperty,
+    FloatProperty,
+    FloatVectorProperty,
+    CollectionProperty,
+)
+
+
+class Task(PropertyGroup):
+    name: StringProperty(name="Name")
+    identification: StringProperty(name="Identification")
+    ifc_definition_id: IntProperty(name="IFC Definition ID")
+
+
+class BIMTaskProperties(PropertyGroup):
+    is_editing: BoolProperty(name="Is Editing", default=False)
+    tasks: CollectionProperty(name="Available Library References", type=Task)
+    active_task_index: IntProperty(name="Active Task Index")

src/ifcblenderexport/blenderbim/bim/module/sequence/ui.py

@@ -0,0 +1,53 @@
+from bpy.types import Panel, UIList
+from blenderbim.bim.ifc import IfcStore
+from blenderbim.bim.module.sequence.data import Data
+
+
+class BIM_PT_tasks(Panel):
+    bl_label = "IFC Tasks"
+    bl_idname = "BIM_PT_tasks"
+    bl_options = {"DEFAULT_CLOSED"}
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "scene"
+
+    @classmethod
+    def poll(cls, context):
+        return IfcStore.get_file()
+
+    def draw(self, context):
+        if not Data.is_loaded:
+            Data.load()
+        self.props = context.scene.BIMTaskProperties
+
+        row = self.layout.row(align=True)
+        row.label(text="{} Tasks Found".format(len(Data.tasks)), icon="ACTION")
+        if self.props.is_editing:
+            row.operator("bim.disable_task_editing_ui", text="", icon="CHECKMARK")
+        else:
+            row.operator("bim.load_tasks", text="", icon="GREASEPENCIL")
+
+        if self.props.is_editing:
+            self.layout.template_list(
+                "BIM_UL_tasks",
+                "",
+                self.props,
+                "tasks",
+                self.props,
+                "active_task_index",
+            )
+
+        if self.props.active_task_index:
+            self.draw_editable_ui(context)
+
+    def draw_editable_ui(self, context):
+        pass
+
+
+class BIM_UL_tasks(UIList):
+    def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
+        if item:
+            row = layout.row(align=True)
+            if item.identification:
+                layout.label(text=item.identification)
+            layout.label(text=item.name)