WIP: Add Welcome Page and use CTRL+Alt+D to trigger

cura/UI/WelcomePagesModel.py

@@ -0,0 +1,45 @@
+
+
+import os
+from typing import TYPE_CHECKING, Optional
+
+from PyQt5.QtCore import QUrl, Qt
+
+from UM.Qt.ListModel import ListModel
+from UM.Resources import Resources
+
+if TYPE_CHECKING:
+    from PyQt5.QtCore import QObject
+
+
+class WelcomePagesModel(ListModel):
+
+    IdRole = Qt.UserRole + 1  # Page ID
+    PageUrlRole = Qt.UserRole + 2  # URL to the page's QML file
+    NextPageIdRole = Qt.UserRole + 3  # The next page ID it should go to
+
+    def __init__(self, parent: Optional["QObject"] = None) -> None:
+        super().__init__(parent)
+
+        self.addRoleName(self.IdRole, "id")
+        self.addRoleName(self.PageUrlRole, "page_url")
+        self.addRoleName(self.NextPageIdRole, "next_page_id")
+
+        self._pages = []
+
+    def initialize(self) -> None:
+        from cura.CuraApplication import CuraApplication
+        # Add default welcome pages
+        self._pages.append({"id": "welcome",
+                            "page_url": QUrl.fromLocalFile(Resources.getPath(CuraApplication.ResourceTypes.QmlFiles,
+                                                                             os.path.join("WelcomePages", "WelcomeContent.qml"))),
+                            }
+                           )
+
+        self.setItems(self._pages)
+
+    def addPage(self):
+        pass
+
+
+__all__ = ["WelcomePagesModel"]