Allow one directonal scrolling

Allows the users to choose which scrollbars can be created

Author: GimLala

pygame_gui/elements/ui_auto_scrolling_container.py

@@ -40,6 +40,8 @@ def __init__(self,
                  anchors: Optional[Dict[str, Union[str, UIElement]]] = None,
                  visible: int = 1):
         super().__init__(relative_rect, manager,
+                         allow_scroll_x=allow_scroll_x,
+                         allow_scroll_y=allow_scroll_y,
                          starting_height=starting_height,
                          container=container,
                          parent_element=parent_element,
@@ -52,26 +54,16 @@ def __init__(self,
                                object_id=object_id,
                                element_id="auto_scrolling_container")
 
-        self.allow_scroll_x = allow_scroll_x
-        self.allow_scroll_y = allow_scroll_y
-
-        anchors = {"left": "left",
-                   "right": "left",
-                   "top": "top",
-                   "bottom": "top"}
-
         resize_left: bool = True
         resize_right: bool = True
         resize_top: bool = True
         resize_bottom: bool = True
 
         if not self.allow_scroll_x:
-            anchors["right"] = "right"
             resize_left = False
             resize_right = False
 
         if not self.allow_scroll_y:
-            anchors["bottom"] = "bottom"
             resize_top = False
             resize_bottom = False
 
@@ -89,9 +81,10 @@ def __init__(self,
                                                             object_id=ObjectID(
                                                                 object_id="#scrollable_container",
                                                                 class_id=None),
-                                                            anchors=anchors)
-
-        self.scrollable_container_dimensions = scrollable_rect.size
+                                                            anchors={"left": "left",
+                                                                     "right": "left",
+                                                                     "top": "top",
+                                                                     "bottom": "top"})
 
     def update(self, time_delta: float):
         """
@@ -103,9 +96,6 @@ def update(self, time_delta: float):
         """
         super().update(time_delta)
 
-        new_dimensions = self.scrollable_container.rect.size
-
-        if self.scrollable_container_dimensions != new_dimensions:
-            self.scrollable_container_dimensions = new_dimensions
+        if self.scrollable_container.has_recently_updated_dimensions:
             self._calculate_scrolling_dimensions()
             self._sort_out_element_container_scroll_bars()

pygame_gui/elements/ui_scrolling_container.py

@@ -34,6 +34,8 @@ class UIScrollingContainer(UIElement, IContainerLikeInterface):
     def __init__(self,
                  relative_rect: pygame.Rect,
                  manager: Optional[IUIManagerInterface] = None,
+                 allow_scroll_x: bool = True,
+                 allow_scroll_y: bool = True,
                  *,
                  starting_height: int = 1,
                  container: Optional[IContainerLikeInterface] = None,
@@ -65,6 +67,9 @@ def __init__(self,
         self.vert_scroll_bar = None  # type: Union[UIVerticalScrollBar, None]
         self.horiz_scroll_bar = None  # type: Union[UIHorizontalScrollBar, None]
 
+        self.allow_scroll_x = allow_scroll_x
+        self.allow_scroll_y = allow_scroll_y
+
         self._set_image(self.ui_manager.get_universal_empty_surface())
 
         # this contains the scroll bars and the 'view' container
@@ -362,11 +367,11 @@ def _check_scroll_bars_and_adjust(self):
         need_horiz_scroll_bar = False
         need_vert_scroll_bar = False
         if (self.scrolling_height > self._view_container.rect.height or
-                self.scrollable_container.relative_rect.top != 0):
+                self.scrollable_container.relative_rect.top != 0) and self.allow_scroll_y:
             need_vert_scroll_bar = True
             self.scroll_bar_width = 20
         if (self.scrolling_width > self._view_container.rect.width or
-                self.scrollable_container.relative_rect.left != 0):
+                self.scrollable_container.relative_rect.left != 0) and self.allow_scroll_x:
             need_horiz_scroll_bar = True
             self.scroll_bar_height = 20
         if need_vert_scroll_bar or need_horiz_scroll_bar: