Move models around again

- Move machine related models to cura.Machines.Models
 - Move printer device related models to cura.PrinterOutput.Models
 - Other UI/GUI related modules in cura.UI

cura/Machines/Models/GlobalStacksModel.py

@@ -0,0 +1,77 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from PyQt5.QtCore import Qt, QTimer
+
+from UM.Qt.ListModel import ListModel
+from UM.i18n import i18nCatalog
+
+from cura.PrinterOutput.PrinterOutputDevice import ConnectionType
+from cura.Settings.CuraContainerRegistry import CuraContainerRegistry
+from cura.Settings.GlobalStack import GlobalStack
+
+
+class GlobalStacksModel(ListModel):
+    NameRole = Qt.UserRole + 1
+    IdRole = Qt.UserRole + 2
+    HasRemoteConnectionRole = Qt.UserRole + 3
+    ConnectionTypeRole = Qt.UserRole + 4
+    MetaDataRole = Qt.UserRole + 5
+    DiscoverySourceRole = Qt.UserRole + 6  # For separating local and remote printers in the machine management page
+
+    def __init__(self, parent = None) -> None:
+        super().__init__(parent)
+
+        self._catalog = i18nCatalog("cura")
+
+        self.addRoleName(self.NameRole, "name")
+        self.addRoleName(self.IdRole, "id")
+        self.addRoleName(self.HasRemoteConnectionRole, "hasRemoteConnection")
+        self.addRoleName(self.MetaDataRole, "metadata")
+        self.addRoleName(self.DiscoverySourceRole, "discoverySource")
+
+        self._change_timer = QTimer()
+        self._change_timer.setInterval(200)
+        self._change_timer.setSingleShot(True)
+        self._change_timer.timeout.connect(self._update)
+
+        # Listen to changes
+        CuraContainerRegistry.getInstance().containerAdded.connect(self._onContainerChanged)
+        CuraContainerRegistry.getInstance().containerMetaDataChanged.connect(self._onContainerChanged)
+        CuraContainerRegistry.getInstance().containerRemoved.connect(self._onContainerChanged)
+        self._updateDelayed()
+
+    ##  Handler for container added/removed events from registry
+    def _onContainerChanged(self, container) -> None:
+        # We only need to update when the added / removed container GlobalStack
+        if isinstance(container, GlobalStack):
+            self._updateDelayed()
+
+    def _updateDelayed(self) -> None:
+        self._change_timer.start()
+
+    def _update(self) -> None:
+        items = []
+
+        container_stacks = CuraContainerRegistry.getInstance().findContainerStacks(type = "machine")
+
+        for container_stack in container_stacks:
+            has_remote_connection = False
+
+            for connection_type in container_stack.configuredConnectionTypes:
+                has_remote_connection |= connection_type in [ConnectionType.NetworkConnection.value,
+                                                             ConnectionType.CloudConnection.value]
+
+            if container_stack.getMetaDataEntry("hidden", False) in ["True", True]:
+                continue
+
+            section_name = "Network enabled printers" if has_remote_connection else "Local printers"
+            section_name = self._catalog.i18nc("@info:title", section_name)
+
+            items.append({"name": container_stack.getMetaDataEntry("group_name", container_stack.getName()),
+                          "id": container_stack.getId(),
+                          "hasRemoteConnection": has_remote_connection,
+                          "metadata": container_stack.getMetaData().copy(),
+                          "discoverySource": section_name})
+        items.sort(key = lambda i: not i["hasRemoteConnection"])
+        self.setItems(items)