Fix up documentation of WelcomePageModel

Some more boyscouting

CURA-8696

cura/UI/WelcomePagesModel.py

@@ -1,7 +1,9 @@
-# Copyright (c) 2019 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
-from collections import deque
+
 import os
+
+from collections import deque
 from typing import TYPE_CHECKING, Optional, List, Dict, Any
 
 from PyQt5.QtCore import QUrl, Qt, pyqtSlot, pyqtProperty, pyqtSignal
@@ -16,24 +18,23 @@ if TYPE_CHECKING:
     from cura.CuraApplication import CuraApplication
 
 
-#
-# This is the Qt ListModel that contains all welcome pages data. Each page is a page that can be shown as a step in the
-# welcome wizard dialog. Each item in this ListModel represents a page, which contains the following fields:
-#
-#  - id           : A unique page_id which can be used in function goToPage(page_id)
-#  - page_url     : The QUrl to the QML file that contains the content of this page
-#  - next_page_id : (OPTIONAL) The next page ID to go to when this page finished. This is optional. If this is not
-#                   provided, it will go to the page with the current index + 1
-#  - next_page_button_text: (OPTIONAL) The text to show for the "next" button, by default it's the translated text of
-#                           "Next". Note that each step QML can decide whether to use this text or not, so it's not
-#                           mandatory.
-#  - should_show_function : (OPTIONAL) An optional function that returns True/False indicating if this page should be
-#                           shown. By default all pages should be shown. If a function returns False, that page will
-#                           be skipped and its next page will be shown.
-#
-# Note that in any case, a page that has its "should_show_function" == False will ALWAYS be skipped.
-#
 class WelcomePagesModel(ListModel):
+    """
+    This is the Qt ListModel that contains all welcome pages data. Each page is a page that can be shown as a step in
+    the welcome wizard dialog. Each item in this ListModel represents a page, which contains the following fields:
+    - id                    : A unique page_id which can be used in function goToPage(page_id)
+    - page_url              : The QUrl to the QML file that contains the content of this page
+    - next_page_id          : (OPTIONAL) The next page ID to go to when this page finished. This is optional. If this is
+                                not provided, it will go to the page with the current index + 1
+    - next_page_button_text : (OPTIONAL) The text to show for the "next" button, by default it's the translated text of
+                                "Next". Note that each step QML can decide whether to use this text or not, so it's not
+                                mandatory.
+    - should_show_function : (OPTIONAL) An optional function that returns True/False indicating if this page should be
+                                shown. By default all pages should be shown. If a function returns False, that page will
+                                be skipped and its next page will be shown.
+
+    Note that in any case, a page that has its "should_show_function" == False will ALWAYS be skipped.
+    """
 
     IdRole = Qt.UserRole + 1  # Page ID
     PageUrlRole = Qt.UserRole + 2  # URL to the page's QML file
@@ -55,11 +56,11 @@ class WelcomePagesModel(ListModel):
 
         self._default_next_button_text = self._catalog.i18nc("@action:button", "Next")
 
-        self._pages = []  # type: List[Dict[str, Any]]
+        self._pages: List[Dict[str, Any]] = []
 
         self._current_page_index = 0
         # Store all the previous page indices so it can go back.
-        self._previous_page_indices_stack = deque()  # type: deque
+        self._previous_page_indices_stack: deque = deque()
 
         # If the welcome flow should be shown. It can show the complete flow or just the changelog depending on the
         # specific case. See initialize() for how this variable is set.
@@ -72,17 +73,21 @@ class WelcomePagesModel(ListModel):
     def currentPageIndex(self) -> int:
         return self._current_page_index
 
-    # Returns a float number in [0, 1] which indicates the current progress.
     @pyqtProperty(float, notify = currentPageIndexChanged)
     def currentProgress(self) -> float:
+        """
+        Returns a float number in [0, 1] which indicates the current progress.
+        """
         if len(self._items) == 0:
             return 0
         else:
             return self._current_page_index / len(self._items)
 
-    # Indicates if the current page is the last page.
     @pyqtProperty(bool, notify = currentPageIndexChanged)
     def isCurrentPageLast(self) -> bool:
+        """
+        Indicates if the current page is the last page.
+        """
         return self._current_page_index == len(self._items) - 1
 
     def _setCurrentPageIndex(self, page_index: int) -> None:
@@ -91,17 +96,22 @@ class WelcomePagesModel(ListModel):
             self._current_page_index = page_index
             self.currentPageIndexChanged.emit()
 
-    # Ends the Welcome-Pages. Put as a separate function for cases like the 'decline' in the User-Agreement.
     @pyqtSlot()
     def atEnd(self) -> None:
+        """
+        Ends the Welcome-Pages. Put as a separate function for cases like the 'decline' in the User-Agreement.
+        """
         self.allFinished.emit()
         self.resetState()
 
-    # Goes to the next page.
-    # If "from_index" is given, it will look for the next page to show starting from the "from_index" page instead of
-    # the "self._current_page_index".
     @pyqtSlot()
     def goToNextPage(self, from_index: Optional[int] = None) -> None:
+        """
+        Goes to the next page.
+        If "from_index" is given, it will look for the next page to show starting from the "from_index" page instead of
+        the "self._current_page_index".
+        """
+
         # Look for the next page that should be shown
         current_index = self._current_page_index if from_index is None else from_index
         while True:
@@ -137,9 +147,11 @@ class WelcomePagesModel(ListModel):
         # Move to the next page
         self._setCurrentPageIndex(next_page_index)
 
-    # Goes to the previous page. If there's no previous page, do nothing.
     @pyqtSlot()
     def goToPreviousPage(self) -> None:
+        """
+        Goes to the previous page. If there's no previous page, do nothing.
+        """
         if len(self._previous_page_indices_stack) == 0:
             Logger.log("i", "No previous page, do nothing")
             return
@@ -148,9 +160,9 @@ class WelcomePagesModel(ListModel):
         self._current_page_index = previous_page_index
         self.currentPageIndexChanged.emit()
 
-    # Sets the current page to the given page ID. If the page ID is not found, do nothing.
     @pyqtSlot(str)
     def goToPage(self, page_id: str) -> None:
+        """Sets the current page to the given page ID. If the page ID is not found, do nothing."""
         page_index = self.getPageIndexById(page_id)
         if page_index is None:
             # FIXME: If we cannot find the next page, we cannot do anything here.
@@ -165,18 +177,22 @@ class WelcomePagesModel(ListModel):
             # Find the next page to show starting from the "page_index"
             self.goToNextPage(from_index = page_index)
 
-    # Checks if the page with the given index should be shown by calling the "should_show_function" associated with it.
-    # If the function is not present, returns True (show page by default).
     def _shouldPageBeShown(self, page_index: int) -> bool:
+        """
+        Checks if the page with the given index should be shown by calling the "should_show_function" associated with
+        it. If the function is not present, returns True (show page by default).
+        """
         next_page_item = self.getItem(page_index)
         should_show_function = next_page_item.get("should_show_function", lambda: True)
         return should_show_function()
 
-    # Resets the state of the WelcomePagesModel. This functions does the following:
-    #  - Resets current_page_index to 0
-    #  - Clears the previous page indices stack
     @pyqtSlot()
     def resetState(self) -> None:
+        """
+        Resets the state of the WelcomePagesModel. This functions does the following:
+            - Resets current_page_index to 0
+            - Clears the previous page indices stack
+        """
         self._current_page_index = 0
         self._previous_page_indices_stack.clear()
 
@@ -188,8 +204,8 @@ class WelcomePagesModel(ListModel):
     def shouldShowWelcomeFlow(self) -> bool:
         return self._should_show_welcome_flow
 
-    # Gets the page index with the given page ID. If the page ID doesn't exist, returns None.
     def getPageIndexById(self, page_id: str) -> Optional[int]:
+        """Gets the page index with the given page ID. If the page ID doesn't exist, returns None."""
         page_idx = None
         for idx, page_item in enumerate(self._items):
             if page_item["id"] == page_id:
@@ -197,8 +213,8 @@ class WelcomePagesModel(ListModel):
                 break
         return page_idx
 
-    # Convenience function to get QUrl path to pages that's located in "resources/qml/WelcomePages".
     def _getBuiltinWelcomePagePath(self, page_filename: str) -> "QUrl":
+        """Convenience function to get QUrl path to pages that's located in "resources/qml/WelcomePages"."""
         from cura.CuraApplication import CuraApplication
         return QUrl.fromLocalFile(Resources.getPath(CuraApplication.ResourceTypes.QmlFiles,
                                                     os.path.join("WelcomePages", page_filename)))
@@ -223,10 +239,11 @@ class WelcomePagesModel(ListModel):
             show_whatsnew_only = has_active_machine and has_app_just_upgraded
 
             # FIXME: This is a hack. Because of the circular dependency between MachineManager, ExtruderManager, and
-            # possibly some others, setting the initial active machine is not done when the MachineManager gets initialized.
+            # possibly some others, setting the initial active machine is not done when the MachineManager gets
-            # So at this point, we don't know if there will be an active machine or not. It could be that the active machine
+            # initialized. So at this point, we don't know if there will be an active machine or not. It could be that
-            # files are corrupted so we cannot rely on Preferences either. This makes sure that once the active machine
+            # the active machine files are corrupted so we cannot rely on Preferences either. This makes sure that once
-            # gets changed, this model updates the flags, so it can decide whether to show the welcome flow or not.
+            # the active machine gets changed, this model updates the flags, so it can decide whether to show the
+            # welcome flow or not.
             should_show_welcome_flow = show_complete_flow or show_whatsnew_only
             if should_show_welcome_flow != self._should_show_welcome_flow:
                 self._should_show_welcome_flow = should_show_welcome_flow
@@ -280,17 +297,19 @@ class WelcomePagesModel(ListModel):
         self._pages = pages_to_show
         self.setItems(self._pages)
 
-    # For convenience, inject the default "next" button text to each item if it's not present.
     def setItems(self, items: List[Dict[str, Any]]) -> None:
+        # For convenience, inject the default "next" button text to each item if it's not present.
         for item in items:
             if "next_page_button_text" not in item:
                 item["next_page_button_text"] = self._default_next_button_text
 
         super().setItems(items)
 
-    # Indicates if the machine action panel should be shown by checking if there's any first start machine actions
-    # available.
     def shouldShowMachineActions(self) -> bool:
+        """
+        Indicates if the machine action panel should be shown by checking if there's any first start machine actions
+        available.
+        """
         global_stack = self._application.getMachineManager().activeMachine
         if global_stack is None:
             return False
@@ -312,6 +331,3 @@ class WelcomePagesModel(ListModel):
 
     def addPage(self) -> None:
         pass
-
-
-__all__ = ["WelcomePagesModel"]