Add export sub-menu

CURA-11561

UM/Qt/Bindings/Bindings.py

@@ -31,6 +31,7 @@
 from . import VisibleMessagesModel
 from . import Utilities
 from . import TableModel
+from . import MeshWritersModel
 
 from UM.Settings.Models.SettingDefinitionsModel import SettingDefinitionsModel
 from UM.Settings.Models.DefinitionContainersModel import DefinitionContainersModel
@@ -127,6 +128,9 @@ def register(self):
         qmlRegisterType(TableModel.TableModel, "UM", 1, 6, "TableModel")
         qmlRegisterType(Window.Window, "UM", 1, 6, "Window")
 
+        # Additions after 5.6
+        qmlRegisterType(MeshWritersModel.MeshWritersModel, "UM", 1, 7, "MeshWritersModel")
+
     @staticmethod
     def addRegisterType(class_type: type, qml_import_name: str, major_version: int, minor_version: int, class_name: str) -> None:
         qmlRegisterType(class_type, qml_import_name, major_version, minor_version, class_name)

UM/Qt/Bindings/MeshWritersModel.py

@@ -0,0 +1,35 @@
+# Copyright (c) 2024 Ultimaker B.V.
+# Uranium is released under the terms of the LGPLv3 or higher.
+
+from typing import List
+
+from PyQt6.QtCore import Qt, pyqtSignal
+from PyQt6.QtQml import QQmlEngine
+
+from UM.Application import Application
+from UM.OutputDevice.OutputDeviceManager import OutputDeviceManager
+from UM.OutputDevice.ProjectOutputDevice import ProjectOutputDevice
+from UM.Qt.ListModel import ListModel
+
+
+class MeshWritersModel(ListModel):
+    """A list model providing a list of all registered MeshWriters that can export meshes.
+
+    Exposes the following roles:
+    * mime_type - The associated writable file mime type
+    * description - The human-readable name of the file format
+
+    """
+
+    MimeTypeRole = Qt.ItemDataRole.UserRole + 1
+    DescriptionRole = Qt.ItemDataRole.UserRole + 2
+
+    def __init__(self, parent = None):
+        super().__init__(parent)
+        # Ensure that this model doesn't get garbage collected (Now the bound object is destroyed when the wrapper is)
+        QQmlEngine.setObjectOwnership(self, QQmlEngine.ObjectOwnership.CppOwnership)
+
+        self.addRoleName(self.MimeTypeRole, "mime_type")
+        self.addRoleName(self.DescriptionRole, "description")
+
+        self.setItems(Application.getInstance().getMeshFileHandler().getSupportedFileTypesWrite())