From 51b7f24a0031f6000b581ea4235d0b701c1879da Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Mon, 3 Jul 2023 16:46:58 +1000
Subject: [PATCH] You can now unload BCF projects to load another one.

---
 src/blenderbim/blenderbim/bim/module/bcf/__init__.py |  1 +
 src/blenderbim/blenderbim/bim/module/bcf/operator.py | 12 +++++++++++-
 src/blenderbim/blenderbim/bim/module/bcf/ui.py       | 10 ++++++----
 src/blenderbim/blenderbim/bim/module/project/ui.py   |  2 +-
 4 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/src/blenderbim/blenderbim/bim/module/bcf/__init__.py b/src/blenderbim/blenderbim/bim/module/bcf/__init__.py
index 37b5f4f271..5e6b55e072 100644
--- a/src/blenderbim/blenderbim/bim/module/bcf/__init__.py
+++ b/src/blenderbim/blenderbim/bim/module/bcf/__init__.py
@@ -57,6 +57,7 @@ classes = (
     operator.SelectBcfBimSnippetReference,
     operator.SelectBcfDocumentReference,
     operator.SelectBcfHeaderFile,
+    operator.UnloadBcfProject,
     operator.ViewBcfTopic,
     prop.BcfReferenceLink,
     prop.BcfLabel,
diff --git a/src/blenderbim/blenderbim/bim/module/bcf/operator.py b/src/blenderbim/blenderbim/bim/module/bcf/operator.py
index f41d70851b..6b44e3cecc 100644
--- a/src/blenderbim/blenderbim/bim/module/bcf/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/bcf/operator.py
@@ -58,7 +58,6 @@ class LoadBcfProject(bpy.types.Operator):
     filter_glob: bpy.props.StringProperty(default="*.bcf;*.bcfzip", options={"HIDDEN"})
 
     def execute(self, context):
-        context.scene.BCFProperties.is_loaded = False
         if self.filepath:
             bcfstore.BcfStore.bcfxml = bcf.bcfxml.load(self.filepath)
         bcfxml = bcfstore.BcfStore.get_bcfxml()
@@ -72,6 +71,17 @@ class LoadBcfProject(bpy.types.Operator):
         return {"RUNNING_MODAL"}
 
 
+class UnloadBcfProject(bpy.types.Operator):
+    bl_idname = "bim.unload_bcf_project"
+    bl_label = "Unload BCF Project"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        bcfstore.BcfStore.set(None)
+        context.scene.BCFProperties.is_loaded = False
+        return {"FINISHED"}
+
+
 class LoadBcfTopics(bpy.types.Operator):
     bl_idname = "bim.load_bcf_topics"
     bl_label = "Load BCF Topics"
diff --git a/src/blenderbim/blenderbim/bim/module/bcf/ui.py b/src/blenderbim/blenderbim/bim/module/bcf/ui.py
index 9c4c5f796b..821d028dbb 100644
--- a/src/blenderbim/blenderbim/bim/module/bcf/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/bcf/ui.py
@@ -39,14 +39,16 @@ class BIM_PT_bcf(Panel):
         scene = context.scene
         props = scene.BCFProperties
 
-        row = layout.row(align=True)
-        row.operator("bim.new_bcf_project", text="New Project")
-        row.operator("bim.load_bcf_project", text="Load Project")
 
         if not props.is_loaded:
+            row = layout.row(align=True)
+            row.operator("bim.new_bcf_project", text="New Project")
+            row.operator("bim.load_bcf_project", text="Load Project")
             return
 
-        row.operator("bim.save_bcf_project", text="Save Project")
+        row = layout.row(align=True)
+        row.operator("bim.save_bcf_project", icon="EXPORT", text="Save Project")
+        row.operator("bim.unload_bcf_project", text="", icon="CANCEL")
 
         row = layout.row()
         row.prop(props, "name")
diff --git a/src/blenderbim/blenderbim/bim/module/project/ui.py b/src/blenderbim/blenderbim/bim/module/project/ui.py
index 7c2730f957..a57c097e25 100644
--- a/src/blenderbim/blenderbim/bim/module/project/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/project/ui.py
@@ -164,7 +164,7 @@ class BIM_PT_project(Panel):
         op.should_save_as = False
         op = row.operator("export_ifc.bim", icon="FILE_TICK", text="Save As")
         op.should_save_as = True
-        row.operator("bim.unload_project", text="", icon="X")
+        row.operator("bim.unload_project", text="", icon="CANCEL")
 
     def draw_create_project_ui(self, context):
         props = context.scene.BIMProperties