minor fixes to slider/scrollbar

Author: MyreMylar

pygame_gui/elements/ui_horizontal_scroll_bar.py

@@ -81,6 +81,8 @@ def __init__(self,
 
         self.drawable_shape = None
         self.shape = 'rectangle'
+        self.left_arrow_text = '◀'
+        self.right_arrow_text = '▶'
 
         self.background_rect = None  # type: Union[None, pygame.Rect]
 
@@ -179,7 +181,7 @@ def rebuild(self):
                 self.left_button = UIButton(pygame.Rect((0, 0),
                                                         (self.arrow_button_width,
                                                          self.background_rect.height)),
-                                            '◀', self.ui_manager,
+                                            self.left_arrow_text, self.ui_manager,
                                             container=self.button_container,
                                             starting_height=1,
                                             parent_element=self,
@@ -195,7 +197,7 @@ def rebuild(self):
                 self.right_button = UIButton(pygame.Rect((-self.arrow_button_width, 0),
                                                          (self.arrow_button_width,
                                                           self.background_rect.height)),
-                                             '▶', self.ui_manager,
+                                             self.right_arrow_text, self.ui_manager,
                                              container=self.button_container,
                                              starting_height=1,
                                              parent_element=self,

pygame_gui/elements/ui_horizontal_slider.py

@@ -65,6 +65,9 @@ def __init__(self,
         self.left_limit_position = 0.0
         self.starting_grab_x_difference = 0
 
+        self.left_arrow_text = '◀'
+        self.right_arrow_text = '▶'
+
         if (isinstance(start_value, int) and
                 isinstance(value_range[0], int) and
                 isinstance(value_range[1], int)):
@@ -181,7 +184,7 @@ def rebuild(self):
                 self.left_button = UIButton(pygame.Rect((0, 0),
                                                         (self.arrow_button_width,
                                                          self.background_rect.height)),
-                                            '◀', self.ui_manager,
+                                            self.left_arrow_text, self.ui_manager,
                                             container=self.button_container,
                                             starting_height=1,
                                             parent_element=self,
@@ -197,7 +200,7 @@ def rebuild(self):
                 self.right_button = UIButton(pygame.Rect((-self.arrow_button_width, 0),
                                                          (self.arrow_button_width,
                                                           self.background_rect.height)),
-                                             '▶', self.ui_manager,
+                                             self.right_arrow_text, self.ui_manager,
                                              container=self.button_container,
                                              starting_height=1,
                                              parent_element=self,

pygame_gui/elements/ui_vertical_scroll_bar.py

@@ -91,6 +91,8 @@ def __init__(self,
         self.bottom_button = None
         self.sliding_button = None
         self.enable_arrow_buttons = True
+        self.top_arrow_text = '▲'
+        self.bottom_arrow_text = '▼'
 
         self.rebuild_from_changed_theme_data()
 
@@ -175,7 +177,7 @@ def rebuild(self):
                 self.top_button = UIButton(pygame.Rect((0, 0),
                                                        (self.background_rect.width,
                                                         self.arrow_button_height)),
-                                           '▲', self.ui_manager,
+                                           self.top_arrow_text, self.ui_manager,
                                            container=self.button_container,
                                            starting_height=1,
                                            parent_element=self,
@@ -191,7 +193,7 @@ def rebuild(self):
                 self.bottom_button = UIButton(pygame.Rect((0, -self.arrow_button_height),
                                                           (self.background_rect.width,
                                                            self.arrow_button_height)),
-                                              '▼', self.ui_manager,
+                                              self.bottom_arrow_text, self.ui_manager,
                                               container=self.button_container,
                                               starting_height=1,
                                               parent_element=self,