class UIPanel(UIElement, IContainerLikeInterface):
"""
A rectangular panel that holds a UI container and is designed to overlap other elements. It
acts a little like a window that is not shuffled about in a stack - instead remaining at the
same layer distance from the container it was initially placed in.
It's primary purpose is for things like involved HUDs in games that want to always sit on top
of UI elements that may be present 'inside' the game world (e.g. player health bars). By
creating a UI Panel at a height above the highest layer used by the game world's UI elements
we can ensure that all elements added to the panel are always above the fray.
:param relative_rect: The positioning and sizing rectangle for the panel. See the layout
guide for details.
:param starting_layer_height: How many layers above its container to place this panel on.
:param manager: The GUI manager that handles drawing and updating the UI and interactions
between elements.
:param margins: Controls the distance between the edge of the panel and where it's
container should begin.
:param container: The container this panel is inside of distinct from this panel's own
container.
:param parent_element: A hierarchical 'parent' used for signifying belonging and used in
theming and events.
:param object_id: An identifier that can be used to help distinguish this particular panel
from others.
:param anchors: Used to layout elements and dictate what the relative_rect is relative to.
Defaults to the top left.
:param visible: Whether the element is visible by default. Warning - container visibility
may override this.
"""
def __init__(self,
relative_rect: pygame.Rect,
starting_layer_height: int,
manager: IUIManagerInterface,
*,
element_id: str = 'panel',
margins: Dict[str, int] = None,
container: Union[IContainerLikeInterface, None] = None,
parent_element: UIElement = None,
object_id: Union[ObjectID, str, None] = None,
anchors: Dict[str, str] = None,
visible: int = 1):
super().__init__(relative_rect,
manager,
container,
starting_height=starting_layer_height,
layer_thickness=1,
anchors=anchors,
visible=visible)
self._create_valid_ids(container=container,
parent_element=parent_element,
object_id=object_id,
element_id=element_id)
self.background_colour = None
self.border_colour = None
self.background_image = None
self.border_width = 1
self.shadow_width = 2
self.shape_corner_radius = 0
self.shape = 'rectangle'
self.rebuild_from_changed_theme_data()
if margins is None:
self.container_margins = {
'left': self.shadow_width + self.border_width,
'right': self.shadow_width + self.border_width,
'top': self.shadow_width + self.border_width,
'bottom': self.shadow_width + self.border_width
}
else:
self.container_margins = margins
container_rect = pygame.Rect(
self.relative_rect.left + self.container_margins['left'],
self.relative_rect.top + self.container_margins['top'],
self.relative_rect.width -
(self.container_margins['left'] + self.container_margins['right']),
self.relative_rect.height -
(self.container_margins['top'] + self.container_margins['bottom']))
self.panel_container = UIContainer(
container_rect,
manager,
starting_height=starting_layer_height,
container=container,
parent_element=self,
object_id=ObjectID(object_id='#panel_container', class_id=None),
anchors=anchors,
visible=self.visible)
def update(self, time_delta: float):
"""
A method called every update cycle of our application. Designed to be overridden by derived
classes but also has a little functionality to make sure the panel's layer 'thickness' is
accurate and to handle window resizing.
:param time_delta: time passed in seconds between one call to this method and the next.
"""
super().update(time_delta)
if self.get_container().get_thickness() != self.layer_thickness:
self.layer_thickness = self.get_container().get_thickness()
def process_event(self, event: pygame.event.Event) -> bool:
"""
Can be overridden, also handle resizing windows. Gives UI Windows access to pygame events.
Currently just blocks mouse click down events from passing through the panel.
:param event: The event to process.
:return: Should return True if this element consumes this event.
"""
consumed_event = False
if (self is not None and event.type == pygame.MOUSEBUTTONDOWN
and event.button in [
pygame.BUTTON_LEFT, pygame.BUTTON_RIGHT,
pygame.BUTTON_MIDDLE
]):
scaled_mouse_pos = self.ui_manager.calculate_scaled_mouse_position(
event.pos)
if self.hover_point(scaled_mouse_pos[0], scaled_mouse_pos[1]):
consumed_event = True
return consumed_event
def get_container(self) -> IUIContainerInterface:
"""
Returns the container that should contain all the UI elements in this panel.
:return UIContainer: The panel's container.
"""
return self.panel_container
def kill(self):
"""
Overrides the basic kill() method of a pygame sprite so that we also kill all the UI
elements in this panel.
"""
self.get_container().kill()
super().kill()
def set_dimensions(self, dimensions: Union[pygame.math.Vector2,
Tuple[int, int], Tuple[float,
float]]):
"""
Set the size of this panel and then re-sizes and shifts the contents of the panel container
to fit the new size.
:param dimensions: The new dimensions to set.
"""
# Don't use a basic gate on this set dimensions method because the container may be a
# different size to the window
super().set_dimensions(dimensions)
new_container_dimensions = (
self.relative_rect.width -
(self.container_margins['left'] + self.container_margins['right']),
self.relative_rect.height -
(self.container_margins['top'] + self.container_margins['bottom']))
if new_container_dimensions != self.get_container().get_size():
container_rel_pos = (self.relative_rect.x +
self.container_margins['left'],
self.relative_rect.y +
self.container_margins['top'])
self.get_container().set_dimensions(new_container_dimensions)
self.get_container().set_relative_position(container_rel_pos)
def set_relative_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
Method to directly set the relative rect position of an element.
:param position: The new position to set.
"""
super().set_relative_position(position)
container_rel_pos = (self.relative_rect.x +
self.container_margins['left'],
self.relative_rect.y +
self.container_margins['top'])
self.get_container().set_relative_position(container_rel_pos)
def set_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int], Tuple[float,
float]]):
"""
Method to directly set the absolute screen rect position of an element.
:param position: The new position to set.
"""
super().set_position(position)
container_rel_pos = (self.relative_rect.x +
self.container_margins['left'],
self.relative_rect.y +
self.container_margins['top'])
self.get_container().set_relative_position(container_rel_pos)
def rebuild_from_changed_theme_data(self):
"""
Checks if any theming parameters have changed, and if so triggers a full rebuild of the
button's drawable shape.
"""
super().rebuild_from_changed_theme_data()
has_any_changed = False
background_colour = self.ui_theme.get_colour_or_gradient(
'dark_bg', self.combined_element_ids)
if background_colour != self.background_colour:
self.background_colour = background_colour
has_any_changed = True
border_colour = self.ui_theme.get_colour_or_gradient(
'normal_border', self.combined_element_ids)
if border_colour != self.border_colour:
self.border_colour = border_colour
has_any_changed = True
background_image = None
try:
background_image = self.ui_theme.get_image(
'background_image', self.combined_element_ids)
except LookupError:
background_image = None
finally:
if background_image != self.background_image:
self.background_image = background_image
has_any_changed = True
# misc
if self._check_misc_theme_data_changed(
attribute_name='shape',
default_value='rectangle',
casting_func=str,
allowed_values=['rectangle', 'rounded_rectangle']):
has_any_changed = True
if self._check_shape_theming_changed(defaults={
'border_width': 1,
'shadow_width': 2,
'shape_corner_radius': 2
}):
has_any_changed = True
if has_any_changed:
self.rebuild()
def rebuild(self):
"""
A complete rebuild of the drawable shape used by this button.
"""
theming_parameters = {
'normal_bg': self.background_colour,
'normal_border': self.border_colour,
'normal_image': self.background_image,
'border_width': self.border_width,
'shadow_width': self.shadow_width,
'shape_corner_radius': self.shape_corner_radius
}
if self.shape == 'rectangle':
self.drawable_shape = RectDrawableShape(self.rect,
theming_parameters,
['normal'],
self.ui_manager)
elif self.shape == 'rounded_rectangle':
self.drawable_shape = RoundedRectangleShape(
self.rect, theming_parameters, ['normal'], self.ui_manager)
self.on_fresh_drawable_shape_ready()
def disable(self):
"""
Disables all elements in the panel so they are no longer interactive.
"""
if self.is_enabled:
self.is_enabled = False
self.panel_container.disable()
def enable(self):
"""
Enables all elements in the panel so they are interactive again.
"""
if not self.is_enabled:
self.is_enabled = True
self.panel_container.enable()
def show(self):
"""
In addition to the base UIElement.show() - call show() of owned container - panel_container.
"""
super().show()
self.panel_container.show()
def hide(self):
"""
In addition to the base UIElement.hide() - call hide() of owned container - panel_container.
"""
self.panel_container.hide()
super().hide()
class UIScrollingContainer(UIElement, IContainerLikeInterface):
"""
A container like UI element that lets users scroll around a larger container of content with
scroll bars.
:param relative_rect: The size and relative position of the container. This will also be the
starting size of the scrolling area.
:param manager: The UI manager for this element.
:param starting_height: The starting layer height of this container above it's container.
Defaults to 1.
:param container: The container this container is within. Defaults to None (which is the root
container for the UI)
:param parent_element: A parent element for this container. Defaults to None, or the
container if you've set that.
:param object_id: An object ID for this element.
:param anchors: Layout anchors in a dictionary.
:param visible: Whether the element is visible by default. Warning - container visibility
may override this.
"""
def __init__(self,
relative_rect: pygame.Rect,
manager: IUIManagerInterface,
*,
starting_height: int = 1,
container: Union[IContainerLikeInterface, None] = None,
parent_element: Union[UIElement, None] = None,
object_id: Union[ObjectID, str, None] = None,
anchors: Union[Dict[str, str], None] = None,
visible: int = 1):
super().__init__(relative_rect,
manager,
container,
starting_height=starting_height,
layer_thickness=2,
anchors=anchors,
visible=visible)
self._create_valid_ids(container=container,
parent_element=parent_element,
object_id=object_id,
element_id='scrolling_container')
# self.parent_element = parent_element
self.scroll_bar_width = 0
self.scroll_bar_height = 0
self.need_to_sort_out_scrollbars = False
self.vert_scroll_bar = None # type: Union[UIVerticalScrollBar, None]
self.horiz_scroll_bar = None # type: Union[UIHorizontalScrollBar, None]
self.set_image(self.ui_manager.get_universal_empty_surface())
# this contains the scroll bars and the 'view' container
self._root_container = UIContainer(relative_rect=relative_rect,
manager=manager,
starting_height=starting_height,
container=container,
parent_element=parent_element,
object_id=ObjectID(object_id='#root_container',
class_id=None),
anchors=anchors,
visible=self.visible)
# This container is the view on to the scrollable container it's size is determined by
# the size of the root container and whether there are any scroll bars or not.
view_rect = pygame.Rect(0, 0, relative_rect.width, relative_rect.height)
self._view_container = UIContainer(relative_rect=view_rect,
manager=manager,
starting_height=0,
container=self._root_container,
parent_element=parent_element,
object_id=ObjectID(object_id='#view_container',
class_id=None),
anchors={'left': 'left',
'right': 'right',
'top': 'top',
'bottom': 'bottom'})
# This container is what we actually put other stuff in.
# It is aligned to the top left corner but that isn't that important for a container that
# can be much larger than it's view
scrollable_rect = pygame.Rect(0, 0, relative_rect.width, relative_rect.height)
self.scrollable_container = UIContainer(relative_rect=scrollable_rect,
manager=manager,
starting_height=0,
container=self._view_container,
parent_element=parent_element,
object_id=ObjectID(
object_id='#scrollable_container',
class_id=None),
anchors={'left': 'left',
'right': 'left',
'top': 'top',
'bottom': 'top'})
self.scrolling_height = 0
self.scrolling_width = 0
self.scrolling_bottom = 0
self.scrolling_right = 0
self._calculate_scrolling_dimensions()
def get_container(self) -> IUIContainerInterface:
"""
Gets the scrollable container area (the one that moves around with the scrollbars)
from this container-like UI element.
:return: the scrolling container.
"""
return self.scrollable_container
def kill(self):
"""
Overrides the basic kill() method of a pygame sprite so that we also kill all the UI
elements in this panel.
"""
self._root_container.kill()
super().kill()
def set_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
Method to directly set the absolute screen rect position of an element.
:param position: The new position to set.
"""
super().set_position(position)
self._root_container.set_dimensions(position)
def set_relative_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
Method to directly set the relative rect position of an element.
:param position: The new position to set.
"""
super().set_relative_position(position)
self._root_container.set_relative_position(position)
def set_dimensions(self, dimensions: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
Method to directly set the dimensions of an element.
NOTE: Using this on elements inside containers with non-default anchoring arrangements
may make a mess of them.
:param dimensions: The new dimensions to set.
"""
super().set_dimensions(dimensions)
self._root_container.set_dimensions(dimensions)
self._calculate_scrolling_dimensions()
self._sort_out_element_container_scroll_bars()
def set_scrollable_area_dimensions(self, dimensions: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
Set the size of the scrollable area container. It starts the same size as the view
container but often you want to expand it, or why have a scrollable container?
:param dimensions: The new dimensions.
"""
self.scrollable_container.set_dimensions(dimensions)
self._calculate_scrolling_dimensions()
self._sort_out_element_container_scroll_bars()
def update(self, time_delta: float):
"""
Updates the scrolling container's position based upon the scroll bars and updates the
scrollbar's visible percentage as well if that has changed.
:param time_delta: The time passed between frames, measured in seconds.
"""
super().update(time_delta)
if (self.vert_scroll_bar is not None and
self.vert_scroll_bar.check_has_moved_recently()):
self._calculate_scrolling_dimensions()
vis_percent = self._view_container.rect.height / self.scrolling_height
if self.vert_scroll_bar.start_percentage <= 0.5:
start_height = int(self.vert_scroll_bar.start_percentage *
self.scrolling_height)
else:
button_percent_height = (self.vert_scroll_bar.sliding_button.rect.height /
self.vert_scroll_bar.scrollable_height)
button_bottom_percent = (self.vert_scroll_bar.start_percentage +
button_percent_height)
start_height = (int(button_bottom_percent * self.scrolling_height) -
self._view_container.rect.height)
if vis_percent < 1.0:
self.vert_scroll_bar.set_visible_percentage(vis_percent)
else:
self._remove_vert_scrollbar()
if self.scrolling_bottom < self._view_container.rect.bottom:
start_height = min(start_height, self._view_container.rect.height)
new_pos = (self.scrollable_container.relative_rect.x,
-start_height)
self.scrollable_container.set_relative_position(new_pos)
if (self.horiz_scroll_bar is not None and
self.horiz_scroll_bar.check_has_moved_recently()):
self._calculate_scrolling_dimensions()
vis_percent = self._view_container.rect.width / self.scrolling_width
if self.horiz_scroll_bar.start_percentage <= 0.5:
start_width = int(self.horiz_scroll_bar.start_percentage *
self.scrolling_width)
else:
button_percent_width = (self.horiz_scroll_bar.sliding_button.rect.width /
self.horiz_scroll_bar.scrollable_width)
button_right_percent = (self.horiz_scroll_bar.start_percentage +
button_percent_width)
start_width = (int(button_right_percent * self.scrolling_width) -
self._view_container.rect.width)
if vis_percent < 1.0:
self.horiz_scroll_bar.set_visible_percentage(vis_percent)
else:
self._remove_horiz_scrollbar()
if self.scrolling_right < self._view_container.rect.right:
start_width = min(start_width, self._view_container.rect.width)
new_pos = (-start_width,
self.scrollable_container.relative_rect.y)
self.scrollable_container.set_relative_position(new_pos)
def _calculate_scrolling_dimensions(self):
"""
Calculate all the variables we need to scroll the container correctly.
This is a bit of a fiddly process since we can resize our viewing area, the scrollable
area and we generally don't want to yank the area you are looking at too much either.
Plus, the scrollbars only have somewhat limited accuracy so need clamping...
"""
scrolling_top = min(self.scrollable_container.rect.top,
self._view_container.rect.top)
scrolling_left = min(self.scrollable_container.rect.left,
self._view_container.rect.left)
# used for clamping
self.scrolling_bottom = max(self.scrollable_container.rect.bottom,
self._view_container.rect.bottom)
self.scrolling_right = max(self.scrollable_container.rect.right,
self._view_container.rect.right)
self.scrolling_height = self.scrolling_bottom - scrolling_top
self.scrolling_width = self.scrolling_right - scrolling_left
def _sort_out_element_container_scroll_bars(self):
"""
This creates, re-sizes or removes the scrollbars after resizing, but not after the scroll
bar has been moved. Instead it tries to keep the scrollbars in the same approximate position
they were in before resizing
"""
self._check_scroll_bars_and_adjust()
need_horiz_scroll_bar, need_vert_scroll_bar = self._check_scroll_bars_and_adjust()
if need_vert_scroll_bar:
vis_percent = self._view_container.rect.height / self.scrolling_height
if self.vert_scroll_bar is None:
self.scroll_bar_width = 20
scroll_bar_rect = pygame.Rect(-self.scroll_bar_width,
0,
self.scroll_bar_width,
self._view_container.rect.height)
self.vert_scroll_bar = UIVerticalScrollBar(relative_rect=scroll_bar_rect,
visible_percentage=vis_percent,
manager=self.ui_manager,
container=self._root_container,
parent_element=self,
anchors={'left': 'right',
'right': 'right',
'top': 'top',
'bottom': 'bottom'})
else:
start_percent = ((self._view_container.rect.top -
self.scrollable_container.rect.top)
/ self.scrolling_height)
self.vert_scroll_bar.start_percentage = start_percent
self.vert_scroll_bar.set_visible_percentage(vis_percent)
self.vert_scroll_bar.set_dimensions((self.scroll_bar_width,
self._view_container.rect.height))
else:
self._remove_vert_scrollbar()
if need_horiz_scroll_bar:
vis_percent = self._view_container.rect.width / self.scrolling_width
if self.horiz_scroll_bar is None:
self.scroll_bar_height = 20
scroll_bar_rect = pygame.Rect(0,
-self.scroll_bar_height,
self._view_container.rect.width,
self.scroll_bar_height)
self.horiz_scroll_bar = UIHorizontalScrollBar(relative_rect=scroll_bar_rect,
visible_percentage=vis_percent,
manager=self.ui_manager,
container=self._root_container,
parent_element=self,
anchors={'left': 'left',
'right': 'right',
'top': 'bottom',
'bottom': 'bottom'})
else:
start_percent = ((self._view_container.rect.left -
self.scrollable_container.rect.left)
/ self.scrolling_width)
self.horiz_scroll_bar.start_percentage = start_percent
self.horiz_scroll_bar.set_visible_percentage(vis_percent)
self.horiz_scroll_bar.set_dimensions((self._view_container.rect.width,
self.scroll_bar_height))
else:
self._remove_horiz_scrollbar()
def _check_scroll_bars_and_adjust(self):
"""
Check if we need a horizontal or vertical scrollbar and adjust the containers if we do.
Adjusting the containers for a scrollbar, may mean we now need a scrollbar in the other
dimension so we need to call this twice.
"""
self.scroll_bar_width = 0
self.scroll_bar_height = 0
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):
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):
need_horiz_scroll_bar = True
self.scroll_bar_height = 20
if need_vert_scroll_bar or need_horiz_scroll_bar:
new_width = (self._root_container.rect.width - self.scroll_bar_width)
new_height = (self._root_container.rect.height - self.scroll_bar_height)
new_dimensions = (new_width, new_height)
self._view_container.set_dimensions(new_dimensions)
self._calculate_scrolling_dimensions()
return need_horiz_scroll_bar, need_vert_scroll_bar
def _remove_vert_scrollbar(self):
"""
Get rid of the vertical scroll bar and resize the containers appropriately.
"""
if self.vert_scroll_bar is not None:
self.vert_scroll_bar.kill()
self.vert_scroll_bar = None
self.scroll_bar_width = 0
new_width = (self._root_container.rect.width - self.scroll_bar_width)
old_height = self._view_container.rect.height
new_dimensions = (new_width, old_height)
self._view_container.set_dimensions(new_dimensions)
self._calculate_scrolling_dimensions()
if self.horiz_scroll_bar is not None:
self.horiz_scroll_bar.set_dimensions((self._view_container.rect.width,
self.scroll_bar_height))
def _remove_horiz_scrollbar(self):
"""
Get rid of the horiz scroll bar and resize the containers appropriately.
"""
if self.horiz_scroll_bar is not None:
self.horiz_scroll_bar.kill()
self.horiz_scroll_bar = None
self.scroll_bar_height = 0
new_height = (self._root_container.rect.height - self.scroll_bar_height)
old_width = self._view_container.rect.width
new_dimensions = (old_width, new_height)
self._view_container.set_dimensions(new_dimensions)
self._calculate_scrolling_dimensions()
if self.vert_scroll_bar is not None:
self.vert_scroll_bar.set_dimensions((self.scroll_bar_width,
self._view_container.rect.height))
def disable(self):
"""
Disables all elements in the container so they are no longer interactive.
"""
if self.is_enabled:
self.is_enabled = False
self._root_container.disable()
def enable(self):
"""
Enables all elements in the container so they are interactive again.
"""
if not self.is_enabled:
self.is_enabled = True
self._root_container.enable()
def show(self):
"""
In addition to the base UIElement.show() - call show() of owned container - _root_container.
All other subelements (view_container, scrollbars) are children of _root_container, so
it's visibility will propagate to them - there is no need to call their show() methods
separately.
"""
super().show()
self._root_container.show()
def hide(self):
"""
In addition to the base UIElement.hide() - call hide() of owned container - _root_container.
All other subelements (view_container, scrollbars) are children of _root_container, so
it's visibility will propagate to them - there is no need to call their hide() methods
separately.
"""
self._root_container.hide()
super().hide()
class UIVerticalScrollBar(UIElement):
"""
A vertical scroll bar allows users to position a smaller visible area within a vertically
larger area.
:param relative_rect: The size and position of the scroll bar.
:param visible_percentage: The vertical percentage of the larger area that is visible,
between 0.0 and 1.0.
:param manager: The UIManager that manages this element.
:param container: The container that this element is within. If set to None will be the
root window's container.
:param parent_element: The element this element 'belongs to' in the theming hierarchy.
:param object_id: A custom defined ID for fine tuning of theming.
:param anchors: A dictionary describing what this element's relative_rect is relative to.
:param visible: Whether the element is visible by default. Warning - container visibility
may override this.
"""
def __init__(self,
relative_rect: pygame.Rect,
visible_percentage: float,
manager: IUIManagerInterface,
container: Union[IContainerLikeInterface, None] = None,
parent_element: UIElement = None,
object_id: Union[ObjectID, str, None] = None,
anchors: Dict[str, str] = None,
visible: int = 1):
super().__init__(relative_rect,
manager,
container,
layer_thickness=2,
starting_height=1,
anchors=anchors,
visible=visible)
self._create_valid_ids(container=container,
parent_element=parent_element,
object_id=object_id,
element_id='vertical_scroll_bar')
self.button_height = 20
self.arrow_button_height = self.button_height
self.scroll_position = 0.0
self.top_limit = 0.0
self.starting_grab_y_difference = 0
self.visible_percentage = max(0.0, min(visible_percentage, 1.0))
self.start_percentage = 0.0
self.grabbed_slider = False
self.has_moved_recently = False
self.scroll_wheel_moved = False
self.scroll_wheel_amount = 0
self.background_colour = None
self.border_colour = None
self.disabled_border_colour = None
self.disabled_background_colour = None
self.border_width = None
self.shadow_width = None
self.drawable_shape = None
self.shape = 'rectangle'
self.shape_corner_radius = None
self.background_rect = None # type: Union[None, pygame.Rect]
self.scrollable_height = None # type: Union[None, int, float]
self.bottom_limit = None
self.sliding_rect_position = None # type: Union[None, pygame.math.Vector2]
self.top_button = None
self.bottom_button = None
self.sliding_button = None
self.enable_arrow_buttons = True
self.button_container = None
self.rebuild_from_changed_theme_data()
scroll_bar_height = max(
5, int(self.scrollable_height * self.visible_percentage))
self.sliding_button = UIButton(pygame.Rect(
(int(self.sliding_rect_position[0]),
int(self.sliding_rect_position[1])),
(self.background_rect.width, scroll_bar_height)),
'',
self.ui_manager,
container=self.button_container,
starting_height=1,
parent_element=self,
object_id="#sliding_button",
anchors={
'left': 'left',
'right': 'right',
'top': 'top',
'bottom': 'top'
})
self.join_focus_sets(self.sliding_button)
self.sliding_button.set_hold_range((100, self.background_rect.height))
def rebuild(self):
"""
Rebuild anything that might need rebuilding.
"""
border_and_shadow = self.border_width + self.shadow_width
self.background_rect = pygame.Rect(
(border_and_shadow + self.relative_rect.x,
border_and_shadow + self.relative_rect.y),
(self.relative_rect.width - (2 * border_and_shadow),
self.relative_rect.height - (2 * border_and_shadow)))
theming_parameters = {
'normal_bg': self.background_colour,
'normal_border': self.border_colour,
'disabled_bg': self.disabled_background_colour,
'disabled_border': self.disabled_border_colour,
'border_width': self.border_width,
'shadow_width': self.shadow_width,
'shape_corner_radius': self.shape_corner_radius
}
if self.shape == 'rectangle':
self.drawable_shape = RectDrawableShape(self.rect,
theming_parameters,
['normal', 'disabled'],
self.ui_manager)
elif self.shape == 'rounded_rectangle':
self.drawable_shape = RoundedRectangleShape(
self.rect, theming_parameters, ['normal', 'disabled'],
self.ui_manager)
self.set_image(self.drawable_shape.get_fresh_surface())
if self.button_container is None:
self.button_container = UIContainer(
self.background_rect,
manager=self.ui_manager,
container=self.ui_container,
anchors=self.anchors,
object_id='#vert_scrollbar_buttons_container',
visible=self.visible)
self.join_focus_sets(self.button_container)
else:
self.button_container.set_dimensions(self.background_rect.size)
self.button_container.set_relative_position(
self.background_rect.topleft)
if self.enable_arrow_buttons:
self.arrow_button_height = self.button_height
if self.top_button is None:
self.top_button = UIButton(pygame.Rect(
(0, 0),
(self.background_rect.width, self.arrow_button_height)),
'▲',
self.ui_manager,
container=self.button_container,
starting_height=1,
parent_element=self,
object_id=ObjectID(
"#top_button", "@arrow_button"),
anchors={
'left': 'left',
'right': 'right',
'top': 'top',
'bottom': 'top'
})
self.join_focus_sets(self.top_button)
if self.bottom_button is None:
self.bottom_button = UIButton(pygame.Rect(
(0, -self.arrow_button_height),
(self.background_rect.width, self.arrow_button_height)),
'▼',
self.ui_manager,
container=self.button_container,
starting_height=1,
parent_element=self,
object_id=ObjectID(
"#bottom_button",
"@arrow_button"),
anchors={
'left': 'left',
'right': 'right',
'top': 'bottom',
'bottom': 'bottom'
})
self.join_focus_sets(self.bottom_button)
else:
self.arrow_button_height = 0
if self.top_button is not None:
self.top_button.kill()
self.top_button = None
if self.bottom_button is not None:
self.bottom_button.kill()
self.bottom_button = None
self.scrollable_height = self.background_rect.height - (
2 * self.arrow_button_height)
self.bottom_limit = self.scrollable_height
scroll_bar_height = max(
5, int(self.scrollable_height * self.visible_percentage))
self.scroll_position = min(max(self.scroll_position, self.top_limit),
self.bottom_limit - scroll_bar_height)
x_pos = 0
y_pos = (self.scroll_position + self.arrow_button_height)
self.sliding_rect_position = pygame.math.Vector2(x_pos, y_pos)
if self.sliding_button is not None:
self.sliding_button.set_relative_position(
self.sliding_rect_position)
self.sliding_button.set_dimensions(
(self.background_rect.width, scroll_bar_height))
self.sliding_button.set_hold_range(
(100, self.background_rect.height))
def check_has_moved_recently(self) -> bool:
"""
Returns True if the scroll bar was moved in the last call to the update function.
:return: True if we've recently moved the scroll bar, False otherwise.
"""
return self.has_moved_recently
def kill(self):
"""
Overrides the kill() method of the UI element class to kill all the buttons in the scroll
bar and clear any of the parts of the scroll bar that are currently recorded as the
'last focused vertical scroll bar element' on the ui manager.
NOTE: the 'last focused' state on the UI manager is used so that the mouse wheel will
move whichever scrollbar we last fiddled with even if we've been doing other stuff.
This seems to be consistent with the most common mousewheel/scrollbar interactions
used elsewhere.
"""
self.button_container.kill()
super().kill()
def process_event(self, event: pygame.event.Event) -> bool:
"""
Checks an event from pygame's event queue to see if the scroll bar needs to react to it.
In this case it is just mousewheel events, mainly because the buttons that make up
the scroll bar will handle the required mouse click events.
:param event: The event to process.
:return: Returns True if we've done something with the input event.
"""
consumed_event = False
if (self.is_enabled and self._check_is_focus_set_hovered()
and event.type == pygame.MOUSEWHEEL):
self.scroll_wheel_moved = True
self.scroll_wheel_amount = event.y
consumed_event = True
return consumed_event
def _check_is_focus_set_hovered(self) -> bool:
"""
Check if this scroll bar's focus set is currently hovered in the UI.
:return: True if it was.
"""
return any(element.hovered for element in self.get_focus_set())
def update(self, time_delta: float):
"""
Called once per update loop of our UI manager. Deals largely with moving the scroll bar
and updating the resulting 'start_percentage' variable that is then used by other
'scrollable' UI elements to control the point they start drawing.
Reacts to presses of the up and down arrow buttons, movement of the mouse wheel and
dragging of the scroll bar itself.
:param time_delta: A float, roughly representing the time in seconds between calls to this
method.
"""
super().update(time_delta)
self.has_moved_recently = False
if self.alive():
moved_this_frame = False
if self.scroll_wheel_moved and (
self.scroll_position > self.top_limit
or self.scroll_position < self.bottom_limit):
self.scroll_wheel_moved = False
self.scroll_position -= self.scroll_wheel_amount * (750.0 *
time_delta)
self.scroll_position = min(
max(self.scroll_position,
self.top_limit), self.bottom_limit -
self.sliding_button.relative_rect.height)
x_pos = 0
y_pos = (self.scroll_position + self.arrow_button_height)
self.sliding_button.set_relative_position((x_pos, y_pos))
moved_this_frame = True
elif self.top_button is not None and self.top_button.held:
self.scroll_position -= (250.0 * time_delta)
self.scroll_position = max(self.scroll_position,
self.top_limit)
x_pos = 0
y_pos = (self.scroll_position + self.arrow_button_height)
self.sliding_button.set_relative_position((x_pos, y_pos))
moved_this_frame = True
elif self.bottom_button is not None and self.bottom_button.held:
self.scroll_position += (250.0 * time_delta)
self.scroll_position = min(
self.scroll_position, self.bottom_limit -
self.sliding_button.relative_rect.height)
x_pos = 0
y_pos = (self.scroll_position + self.arrow_button_height)
self.sliding_button.set_relative_position((x_pos, y_pos))
moved_this_frame = True
mouse_x, mouse_y = self.ui_manager.get_mouse_position()
if self.sliding_button.held and self.sliding_button.in_hold_range(
(mouse_x, mouse_y)):
if not self.grabbed_slider:
self.grabbed_slider = True
real_scroll_pos = self.sliding_button.rect.top
self.starting_grab_y_difference = mouse_y - real_scroll_pos
real_scroll_pos = self.sliding_button.rect.top
current_grab_difference = mouse_y - real_scroll_pos
adjustment_required = current_grab_difference - self.starting_grab_y_difference
self.scroll_position = self.scroll_position + adjustment_required
self.scroll_position = min(
max(self.scroll_position, self.top_limit),
self.bottom_limit - self.sliding_button.rect.height)
x_pos = 0
y_pos = (self.scroll_position + self.arrow_button_height)
self.sliding_button.set_relative_position((x_pos, y_pos))
moved_this_frame = True
elif not self.sliding_button.held:
self.grabbed_slider = False
if moved_this_frame:
self.start_percentage = self.scroll_position / self.scrollable_height
if not self.has_moved_recently:
self.has_moved_recently = True
def redraw_scrollbar(self):
"""
Redraws the 'scrollbar' portion of the whole UI element. Called when we change the
visible percentage.
"""
self.scrollable_height = self.background_rect.height - (
2 * self.arrow_button_height)
self.bottom_limit = self.scrollable_height
scroll_bar_height = max(
5, int(self.scrollable_height * self.visible_percentage))
x_pos = 0
y_pos = (self.scroll_position + self.arrow_button_height)
self.sliding_rect_position = pygame.math.Vector2(x_pos, y_pos)
if self.sliding_button is None:
self.sliding_button = UIButton(pygame.Rect(
int(x_pos), int(y_pos), self.background_rect.width,
scroll_bar_height),
'',
self.ui_manager,
container=self.button_container,
starting_height=1,
parent_element=self,
object_id="#sliding_button",
anchors={
'left': 'left',
'right': 'right',
'top': 'top',
'bottom': 'top'
})
self.join_focus_sets(self.sliding_button)
else:
self.sliding_button.set_relative_position(
self.sliding_rect_position)
self.sliding_button.set_dimensions(
(self.background_rect.width, scroll_bar_height))
self.sliding_button.set_hold_range((100, self.background_rect.height))
def set_visible_percentage(self, percentage: float):
"""
Sets the percentage of the total 'scrollable area' that is currently visible. This will
affect the size of the scrollbar and should be called if the vertical size of the
'scrollable area' or the vertical size of the visible area change.
:param percentage: A float between 0.0 and 1.0 representing the percentage that is visible.
"""
self.visible_percentage = max(0.0, min(1.0, percentage))
if 1.0 - self.start_percentage < self.visible_percentage:
self.start_percentage = 1.0 - self.visible_percentage
self.redraw_scrollbar()
def reset_scroll_position(self):
"""
Reset the current scroll position back to the top.
"""
self.scroll_position = 0.0
self.start_percentage = 0.0
def rebuild_from_changed_theme_data(self):
"""
Called by the UIManager to check the theming data and rebuild whatever needs rebuilding
for this element when the theme data has changed.
"""
super().rebuild_from_changed_theme_data()
has_any_changed = False
if self._check_misc_theme_data_changed(
attribute_name='shape',
default_value='rectangle',
casting_func=str,
allowed_values=['rectangle', 'rounded_rectangle']):
has_any_changed = True
if self._check_shape_theming_changed(defaults={
'border_width': 1,
'shadow_width': 2,
'shape_corner_radius': 2
}):
has_any_changed = True
background_colour = self.ui_theme.get_colour_or_gradient(
'dark_bg', self.combined_element_ids)
if background_colour != self.background_colour:
self.background_colour = background_colour
has_any_changed = True
border_colour = self.ui_theme.get_colour_or_gradient(
'normal_border', self.combined_element_ids)
if border_colour != self.border_colour:
self.border_colour = border_colour
has_any_changed = True
disabled_background_colour = self.ui_theme.get_colour_or_gradient(
'disabled_dark_bg', self.combined_element_ids)
if disabled_background_colour != self.disabled_background_colour:
self.disabled_background_colour = disabled_background_colour
has_any_changed = True
disabled_border_colour = self.ui_theme.get_colour_or_gradient(
'disabled_border', self.combined_element_ids)
if disabled_border_colour != self.disabled_border_colour:
self.disabled_border_colour = disabled_border_colour
has_any_changed = True
def parse_to_bool(str_data: str):
return bool(int(str_data))
if self._check_misc_theme_data_changed(
attribute_name='enable_arrow_buttons',
default_value=True,
casting_func=parse_to_bool):
has_any_changed = True
if has_any_changed:
self.rebuild()
def set_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int], Tuple[float,
float]]):
"""
Sets the absolute screen position of this scroll bar, updating all subordinate button
elements at the same time.
:param position: The absolute screen position to set.
"""
super().set_position(position)
border_and_shadow = self.border_width + self.shadow_width
self.background_rect.x = border_and_shadow + self.relative_rect.x
self.background_rect.y = border_and_shadow + self.relative_rect.y
self.button_container.set_relative_position(
self.background_rect.topleft)
def set_relative_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
Sets the relative screen position of this scroll bar, updating all subordinate button
elements at the same time.
:param position: The relative screen position to set.
"""
super().set_relative_position(position)
border_and_shadow = self.border_width + self.shadow_width
self.background_rect.x = border_and_shadow + self.relative_rect.x
self.background_rect.y = border_and_shadow + self.relative_rect.y
self.button_container.set_relative_position(
self.background_rect.topleft)
def set_dimensions(self, dimensions: Union[pygame.math.Vector2,
Tuple[int, int], Tuple[float,
float]]):
"""
Method to directly set the dimensions of an element.
:param dimensions: The new dimensions to set.
"""
super().set_dimensions(dimensions)
border_and_shadow = self.border_width + self.shadow_width
self.background_rect.width = self.relative_rect.width - (
2 * border_and_shadow)
self.background_rect.height = self.relative_rect.height - (
2 * border_and_shadow)
self.button_container.set_dimensions(self.background_rect.size)
# sort out scroll bar parameters
self.scrollable_height = self.background_rect.height - (
2 * self.arrow_button_height)
self.bottom_limit = self.scrollable_height
scroll_bar_height = max(
5, int(self.scrollable_height * self.visible_percentage))
base_scroll_bar_y = self.arrow_button_height
max_scroll_bar_y = base_scroll_bar_y + (self.scrollable_height -
scroll_bar_height)
self.sliding_rect_position.y = max(
base_scroll_bar_y,
min((base_scroll_bar_y +
int(self.start_percentage * self.scrollable_height)),
max_scroll_bar_y))
self.scroll_position = self.sliding_rect_position.y - base_scroll_bar_y
self.sliding_button.set_dimensions(
(self.background_rect.width, scroll_bar_height))
self.sliding_button.set_relative_position(self.sliding_rect_position)
def disable(self):
"""
Disables the scroll bar so it is no longer interactive.
"""
if self.is_enabled:
self.is_enabled = False
self.button_container.disable()
self.drawable_shape.set_active_state('disabled')
def enable(self):
"""
Enables the scroll bar so it is interactive once again.
"""
if not self.is_enabled:
self.is_enabled = True
self.button_container.enable()
self.drawable_shape.set_active_state('normal')
def show(self):
"""
In addition to the base UIElement.show() - show the self.button_container which will
propagate and show all the buttons.
"""
super().show()
self.button_container.show()
def hide(self):
"""
In addition to the base UIElement.hide() - hide the self.button_container which will
propagate and hide all the buttons.
"""
super().hide()
self.button_container.hide()
class UISelectionList(UIElement):
"""
A rectangular element that holds any number of selectable text items displayed as a list.
:param relative_rect: The positioning and sizing rectangle for the panel. See the layout guide
for details.
:param item_list: A list of items as strings (item name only), or tuples of two strings (name,
theme_object_id).
:param manager: The GUI manager that handles drawing and updating the UI and interactions
between elements.
:param allow_multi_select: True if we are allowed to pick multiple things from the selection
list.
:param allow_double_clicks: True if we can double click on items in the selection list.
:param container: The container this element is inside of (by default the root container)
distinct from this panel's container.
:param starting_height: The starting height up from it's container where this list is placed
into a layer.
:param parent_element: A hierarchical 'parent' used for signifying belonging and used in
theming and events.
:param object_id: An identifier that can be used to help distinguish this particular element
from others with the same hierarchy.
:param anchors: Used to layout elements and dictate what the relative_rect is relative to.
Defaults to the top left.
:param visible: Whether the element is visible by default. Warning - container visibility
may override this.
"""
def __init__(self,
relative_rect: pygame.Rect,
item_list: Union[List[str], List[Tuple[str, str]]],
manager: IUIManagerInterface,
*,
allow_multi_select: bool = False,
allow_double_clicks: bool = True,
container: Union[IContainerLikeInterface, None] = None,
starting_height: int = 1,
parent_element: UIElement = None,
object_id: Union[ObjectID, str, None] = None,
anchors: Dict[str, str] = None,
visible: int = 1):
super().__init__(relative_rect,
manager,
container,
starting_height=starting_height,
layer_thickness=1,
anchors=anchors,
visible=visible)
self._create_valid_ids(container=container,
parent_element=parent_element,
object_id=object_id,
element_id='selection_list')
self._parent_element = parent_element
self.list_and_scroll_bar_container = None
self.item_list_container = None
self._raw_item_list = item_list
self.item_list = []
self.allow_multi_select = allow_multi_select
self.allow_double_clicks = allow_double_clicks
self.background_colour = None
self.border_colour = None
self.background_image = None
self.border_width = 1
self.shadow_width = 2
self.shape_corner_radius = 0
self.shape = 'rectangle'
self.scroll_bar = None # type: Union[UIVerticalScrollBar, None]
self.lowest_list_pos = 0
self.total_height_of_list = 0
self.list_item_height = 20
self.scroll_bar_width = 20
self.current_scroll_bar_width = 0
self.rebuild_from_changed_theme_data()
def get_single_selection(self) -> Union[str, None]:
"""
Get the selected item in a list, if any. Only works if this is a single-selection list.
:return: A single item name as a string or None.
"""
if not self.allow_multi_select:
selected_list = [
item['text'] for item in self.item_list if item['selected']
]
if len(selected_list) == 1:
return selected_list[0]
elif len(selected_list) == 0:
return None
else:
raise RuntimeError(
'More than one item selected in single-selection,'
' selection list')
else:
raise RuntimeError('Requesting single selection,'
' from multi-selection list')
def get_multi_selection(self) -> List[str]:
"""
Get all the selected items in our selection list. Only works if this is a
multi-selection list.
:return: A list of the selected items in our selection list. May be empty if nothing
selected.
"""
if self.allow_multi_select:
return [
item['text'] for item in self.item_list if item['selected']
]
else:
raise RuntimeError(
'Requesting multi selection, from single-selection list')
def update(self, time_delta: float):
"""
A method called every update cycle of our application. Designed to be overridden by
derived classes but also has a little functionality to make sure the panel's layer
'thickness' is accurate and to handle window resizing.
:param time_delta: time passed in seconds between one call to this method and the next.
"""
super().update(time_delta)
if self.scroll_bar is not None and self.scroll_bar.check_has_moved_recently(
):
list_height_adjustment = min(
self.scroll_bar.start_percentage * self.total_height_of_list,
self.lowest_list_pos)
for index, item in enumerate(self.item_list):
new_height = int((index * self.list_item_height) -
list_height_adjustment)
if (-self.list_item_height <= new_height <=
self.item_list_container.relative_rect.height):
if item['button_element'] is not None:
item['button_element'].set_relative_position(
(0, new_height))
else:
button_rect = pygame.Rect(
0, new_height,
self.item_list_container.relative_rect.width,
self.list_item_height)
button = UIButton(
relative_rect=button_rect,
text=item['text'],
manager=self.ui_manager,
parent_element=self,
container=self.item_list_container,
object_id=ObjectID(
object_id=item['object_id'],
class_id='@selection_list_item'),
allow_double_clicks=self.allow_double_clicks,
anchors={
'left': 'left',
'right': 'right',
'top': 'top',
'bottom': 'top'
})
self.join_focus_sets(button)
item['button_element'] = button
if item['selected']:
item['button_element'].select()
else:
if item['button_element'] is not None:
item['button_element'].kill()
item['button_element'] = None
def set_item_list(self, new_item_list: Union[List[str], List[Tuple[str,
str]]]):
"""
Set a new string list (or tuple of strings & ids list) as the item list for this selection
list. This will change what is displayed in the list.
Tuples should be arranged like so:
(list_text, object_ID)
- list_text: displayed in the UI
- object_ID: used for theming and events
:param new_item_list: The new list to switch to. Can be a list of strings or tuples.
"""
self._raw_item_list = new_item_list
self.item_list = [] # type: List[Dict]
for new_item in new_item_list:
if isinstance(new_item, str):
new_item_list_item = {
'text': new_item,
'button_element': None,
'selected': False,
'object_id': '#item_list_item'
}
elif isinstance(new_item, tuple):
new_item_list_item = {
'text': new_item[0],
'button_element': None,
'selected': False,
'object_id': new_item[1]
}
else:
raise ValueError('Invalid item list')
self.item_list.append(new_item_list_item)
self.total_height_of_list = self.list_item_height * len(self.item_list)
self.lowest_list_pos = (
self.total_height_of_list -
self.list_and_scroll_bar_container.relative_rect.height)
inner_visible_area_height = self.list_and_scroll_bar_container.relative_rect.height
if self.total_height_of_list > inner_visible_area_height:
# we need a scroll bar
self.current_scroll_bar_width = self.scroll_bar_width
percentage_visible = inner_visible_area_height / max(
self.total_height_of_list, 1)
if self.scroll_bar is not None:
self.scroll_bar.reset_scroll_position()
self.scroll_bar.set_visible_percentage(percentage_visible)
self.scroll_bar.start_percentage = 0
else:
self.scroll_bar = UIVerticalScrollBar(
pygame.Rect(-self.scroll_bar_width, 0,
self.scroll_bar_width,
inner_visible_area_height),
visible_percentage=percentage_visible,
manager=self.ui_manager,
parent_element=self,
container=self.list_and_scroll_bar_container,
anchors={
'left': 'right',
'right': 'right',
'top': 'top',
'bottom': 'bottom'
})
self.join_focus_sets(self.scroll_bar)
else:
if self.scroll_bar is not None:
self.scroll_bar.kill()
self.scroll_bar = None
self.current_scroll_bar_width = 0
# create button list container
if self.item_list_container is not None:
self.item_list_container.clear()
if (self.item_list_container.relative_rect.width !=
(self.list_and_scroll_bar_container.relative_rect.width -
self.current_scroll_bar_width)):
container_dimensions = (
self.list_and_scroll_bar_container.relative_rect.width -
self.current_scroll_bar_width,
self.list_and_scroll_bar_container.relative_rect.height)
self.item_list_container.set_dimensions(container_dimensions)
else:
self.item_list_container = UIContainer(
pygame.Rect(
0, 0,
self.list_and_scroll_bar_container.relative_rect.width -
self.current_scroll_bar_width,
self.list_and_scroll_bar_container.relative_rect.height),
manager=self.ui_manager,
starting_height=0,
parent_element=self,
container=self.list_and_scroll_bar_container,
object_id='#item_list_container',
anchors={
'left': 'left',
'right': 'right',
'top': 'top',
'bottom': 'bottom'
})
self.join_focus_sets(self.item_list_container)
item_y_height = 0
for item in self.item_list:
if item_y_height <= self.item_list_container.relative_rect.height:
button_rect = pygame.Rect(
0, item_y_height,
self.item_list_container.relative_rect.width,
self.list_item_height)
item['button_element'] = UIButton(
relative_rect=button_rect,
text=item['text'],
manager=self.ui_manager,
parent_element=self,
container=self.item_list_container,
object_id=ObjectID(object_id=item['object_id'],
class_id='@selection_list_item'),
allow_double_clicks=self.allow_double_clicks,
anchors={
'left': 'left',
'right': 'right',
'top': 'top',
'bottom': 'top'
})
self.join_focus_sets(item['button_element'])
item_y_height += self.list_item_height
else:
break
def process_event(self, event: pygame.event.Event) -> bool:
"""
Can be overridden, also handle resizing windows. Gives UI Windows access to pygame events.
Currently just blocks mouse click down events from passing through the panel.
:param event: The event to process.
:return: Should return True if this element makes use of this event.
"""
if self.is_enabled and (
event.type == pygame.USEREVENT and event.user_type
in [UI_BUTTON_PRESSED, UI_BUTTON_DOUBLE_CLICKED]
and event.ui_element in self.item_list_container.elements):
for item in self.item_list:
if item['button_element'] == event.ui_element:
if event.user_type == UI_BUTTON_DOUBLE_CLICKED:
event_data = {
'user_type':
UI_SELECTION_LIST_DOUBLE_CLICKED_SELECTION,
'text': event.ui_element.text,
'ui_element': self,
'ui_object_id': self.most_specific_combined_id
}
else:
if item['selected']:
item['selected'] = False
event.ui_element.unselect()
event_data = {
'user_type':
UI_SELECTION_LIST_DROPPED_SELECTION,
'text': event.ui_element.text,
'ui_element': self,
'ui_object_id': self.most_specific_combined_id
}
else:
item['selected'] = True
event.ui_element.select()
event_data = {
'user_type': UI_SELECTION_LIST_NEW_SELECTION,
'text': event.ui_element.text,
'ui_element': self,
'ui_object_id': self.most_specific_combined_id
}
selection_list_event = pygame.event.Event(
pygame.USEREVENT, event_data)
pygame.event.post(selection_list_event)
elif not self.allow_multi_select:
if item['selected']:
item['selected'] = False
if item['button_element'] is not None:
item['button_element'].unselect()
event_data = {
'user_type':
UI_SELECTION_LIST_DROPPED_SELECTION,
'text': item['text'],
'ui_element': self,
'ui_object_id': self.most_specific_combined_id
}
drop_down_changed_event = pygame.event.Event(
pygame.USEREVENT, event_data)
pygame.event.post(drop_down_changed_event)
return False # Don't consume any events
def set_dimensions(self, dimensions: Union[pygame.math.Vector2,
Tuple[int, int], Tuple[float,
float]]):
"""
Set the size of this panel and then resizes and shifts the contents of the panel container
to fit the new size.
:param dimensions: The new dimensions to set.
"""
# Don't use a basic gate on this set dimensions method because the container may be a
# different size to the window
super().set_dimensions(dimensions)
border_and_shadow = self.border_width + self.shadow_width
container_width = self.relative_rect.width - (2 * border_and_shadow)
container_height = self.relative_rect.height - (2 * border_and_shadow)
self.list_and_scroll_bar_container.set_dimensions(
(container_width, container_height))
def set_relative_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
Method to directly set the relative rect position of an element.
:param position: The new position to set.
"""
super().set_relative_position(position)
border_and_shadow = self.border_width + self.shadow_width
container_left = self.relative_rect.left + border_and_shadow
container_top = self.relative_rect.top + border_and_shadow
self.list_and_scroll_bar_container.set_relative_position(
(container_left, container_top))
def set_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int], Tuple[float,
float]]):
"""
Sets the absolute screen position of this slider, updating all subordinate button
elements at the same time.
:param position: The absolute screen position to set.
"""
super().set_position(position)
border_and_shadow = self.border_width + self.shadow_width
container_left = self.relative_rect.left + border_and_shadow
container_top = self.relative_rect.top + border_and_shadow
self.list_and_scroll_bar_container.set_relative_position(
(container_left, container_top))
def kill(self):
"""
Overrides the basic kill() method of a pygame sprite so that we also kill all the UI
elements in this panel.
"""
self.list_and_scroll_bar_container.kill()
super().kill()
def rebuild_from_changed_theme_data(self):
"""
Checks if any theming parameters have changed, and if so triggers a full rebuild of the
button's drawable shape
"""
super().rebuild_from_changed_theme_data()
has_any_changed = False
background_colour = self.ui_theme.get_colour_or_gradient(
'dark_bg', self.combined_element_ids)
if background_colour != self.background_colour:
self.background_colour = background_colour
has_any_changed = True
border_colour = self.ui_theme.get_colour_or_gradient(
'normal_border', self.combined_element_ids)
if border_colour != self.border_colour:
self.border_colour = border_colour
has_any_changed = True
# misc
if self._check_misc_theme_data_changed(
attribute_name='shape',
default_value='rectangle',
casting_func=str,
allowed_values=['rectangle', 'rounded_rectangle']):
has_any_changed = True
if self._check_shape_theming_changed(defaults={
'border_width': 1,
'shadow_width': 2,
'shape_corner_radius': 2
}):
has_any_changed = True
if self._check_misc_theme_data_changed(
attribute_name='list_item_height',
default_value=20,
casting_func=int):
has_any_changed = True
if has_any_changed:
self.rebuild()
def rebuild(self):
"""
A complete rebuild of the drawable shape used by this element.
"""
theming_parameters = {
'normal_bg': self.background_colour,
'normal_border': self.border_colour,
'normal_image': self.background_image,
'border_width': self.border_width,
'shadow_width': self.shadow_width,
'shape_corner_radius': self.shape_corner_radius
}
if self.shape == 'rectangle':
self.drawable_shape = RectDrawableShape(self.rect,
theming_parameters,
['normal'],
self.ui_manager)
elif self.shape == 'rounded_rectangle':
self.drawable_shape = RoundedRectangleShape(
self.rect, theming_parameters, ['normal'], self.ui_manager)
self.on_fresh_drawable_shape_ready()
if self.list_and_scroll_bar_container is None:
self.list_and_scroll_bar_container = UIContainer(
pygame.Rect(
self.relative_rect.left + self.shadow_width +
self.border_width, self.relative_rect.top +
self.shadow_width + self.border_width,
self.relative_rect.width - (2 * self.shadow_width) -
(2 * self.border_width), self.relative_rect.height -
(2 * self.shadow_width) - (2 * self.border_width)),
manager=self.ui_manager,
starting_height=self.starting_height,
container=self.ui_container,
parent_element=self._parent_element,
object_id='#selection_list_container',
anchors=self.anchors,
visible=self.visible)
self.join_focus_sets(self.list_and_scroll_bar_container)
else:
self.list_and_scroll_bar_container.set_dimensions(
(self.relative_rect.width - (2 * self.shadow_width) -
(2 * self.border_width), self.relative_rect.height -
(2 * self.shadow_width) - (2 * self.border_width)))
self.list_and_scroll_bar_container.set_relative_position(
(self.relative_rect.left + self.shadow_width +
self.border_width, self.relative_rect.top +
self.shadow_width + self.border_width))
self.set_item_list(self._raw_item_list)
def disable(self):
"""
Disables all elements in the selection list so they are no longer interactive.
"""
if self.is_enabled:
self.is_enabled = False
self.list_and_scroll_bar_container.disable()
# clear selections
for item in self.item_list:
item['selected'] = False
def enable(self):
"""
Enables all elements in the selection list so they are interactive again.
"""
if not self.is_enabled:
self.is_enabled = True
self.list_and_scroll_bar_container.enable()
def show(self):
"""
In addition to the base UIElement.show() - call show() of owned container -
list_and_scroll_bar_container. All other subelements (item_list_container, scrollbar) are
children of list_and_scroll_bar_container, so it's visibility will propagate to them -
there is no need to call their show() methods separately.
"""
super().show()
self.list_and_scroll_bar_container.show()
def hide(self):
"""
In addition to the base UIElement.hide() - call hide() of owned container -
list_and_scroll_bar_container. All other subelements (item_list_container, scrollbar) are
children of list_and_scroll_bar_container, so it's visibility will propagate to them -
there is no need to call their hide() methods separately.
"""
super().hide()
self.list_and_scroll_bar_container.hide()
class UIWindow(UIElement, IContainerLikeInterface, IWindowInterface):
"""
A base class for window GUI elements, any windows should inherit from this class.
:param rect: A rectangle, representing size and position of the window (including title bar,
shadow and borders).
:param manager: The UIManager that manages this UIWindow.
:param window_display_title: A string that will appear in the windows title bar if it has one.
:param element_id: An element ID for this window, if one is not supplied it defaults to
'window'.
:param object_id: An optional object ID for this window, useful for distinguishing different
windows.
:param resizable: Whether this window is resizable or not, defaults to False.
:param visible: Whether the element is visible by default. Warning - container visibility may
override this.
"""
def __init__(self,
rect: pygame.Rect,
manager: IUIManagerInterface,
window_display_title: str = "",
element_id: Union[str, None] = None,
object_id: Union[ObjectID, str, None] = None,
resizable: bool = False,
visible: int = 1):
self.window_display_title = window_display_title
self._window_root_container = None # type: Union[UIContainer, None]
self.resizable = resizable
self.minimum_dimensions = (100, 100)
self.edge_hovering = [False, False, False, False]
super().__init__(rect,
manager,
container=None,
starting_height=1,
layer_thickness=1,
visible=visible)
if element_id is None:
element_id = 'window'
self._create_valid_ids(container=None,
parent_element=None,
object_id=object_id,
element_id=element_id)
self.set_image(self.ui_manager.get_universal_empty_surface())
self.bring_to_front_on_focused = True
self.is_blocking = False # blocks all clicking events from interacting beyond this window
self.resizing_mode_active = False
self.start_resize_point = (0, 0)
self.start_resize_rect = None # type: Union[pygame.Rect, None]
self.grabbed_window = False
self.starting_grab_difference = (0, 0)
self.background_colour = None
self.border_colour = None
self.shape = 'rectangle'
self.enable_title_bar = True
self.enable_close_button = True
self.title_bar_height = 28
self.title_bar_close_button_width = self.title_bar_height
# UI elements
self.window_element_container = None # type: Union[UIContainer, None]
self.title_bar = None # type: Union[UIButton, None]
self.close_window_button = None # type: Union[UIButton, None]
self.rebuild_from_changed_theme_data()
self.window_stack = self.ui_manager.get_window_stack()
self.window_stack.add_new_window(self)
def set_blocking(self, state: bool):
"""
Sets whether this window being open should block clicks to the rest of the UI or not.
Defaults to False.
:param state: True if this window should block mouse clicks.
"""
self.is_blocking = state
def set_minimum_dimensions(self, dimensions: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
If this window is resizable, then the dimensions we set here will be the minimum that
users can change the window to. They are also used as the minimum size when
'set_dimensions' is called.
:param dimensions: The new minimum dimension for the window.
"""
self.minimum_dimensions = (min(self.ui_container.rect.width,
int(dimensions[0])),
min(self.ui_container.rect.height,
int(dimensions[1])))
if ((self.rect.width < self.minimum_dimensions[0])
or (self.rect.height < self.minimum_dimensions[1])):
new_width = max(self.minimum_dimensions[0], self.rect.width)
new_height = max(self.minimum_dimensions[1], self.rect.height)
self.set_dimensions((new_width, new_height))
def set_dimensions(self, dimensions: Union[pygame.math.Vector2,
Tuple[int, int], Tuple[float,
float]]):
"""
Set the size of this window and then re-sizes and shifts the contents of the windows
container to fit the new size.
:param dimensions: The new dimensions to set.
"""
# clamp to minimum dimensions and container size
dimensions = (min(self.ui_container.rect.width,
max(self.minimum_dimensions[0], int(dimensions[0]))),
min(self.ui_container.rect.height,
max(self.minimum_dimensions[1], int(dimensions[1]))))
# Don't use a basic gate on this set dimensions method because the container may be a
# different size to the window
super().set_dimensions(dimensions)
if self._window_root_container is not None:
new_container_dimensions = (self.relative_rect.width -
(2 * self.shadow_width),
self.relative_rect.height -
(2 * self.shadow_width))
if new_container_dimensions != self._window_root_container.relative_rect.size:
self._window_root_container.set_dimensions(
new_container_dimensions)
container_pos = (self.relative_rect.x + self.shadow_width,
self.relative_rect.y + self.shadow_width)
self._window_root_container.set_relative_position(
container_pos)
def set_relative_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int],
Tuple[float, float]]):
"""
Method to directly set the relative rect position of an element.
:param position: The new position to set.
"""
super().set_relative_position(position)
if self._window_root_container is not None:
container_pos = (self.relative_rect.x + self.shadow_width,
self.relative_rect.y + self.shadow_width)
self._window_root_container.set_relative_position(container_pos)
def set_position(self, position: Union[pygame.math.Vector2,
Tuple[int, int], Tuple[float,
float]]):
"""
Method to directly set the absolute screen rect position of an element.
:param position: The new position to set.
"""
super().set_position(position)
if self._window_root_container is not None:
container_pos = (self.relative_rect.x + self.shadow_width,
self.relative_rect.y + self.shadow_width)
self._window_root_container.set_relative_position(container_pos)
def process_event(self, event: pygame.event.Event) -> bool:
"""
Handles resizing & closing windows. Gives UI Windows access to pygame events. Derived
windows should super() call this class if they implement their own process_event method.
:param event: The event to process.
:return bool: Return True if this element should consume this event and not pass it to the
rest of the UI.
"""
consumed_event = False
if self.is_blocking and event.type == pygame.MOUSEBUTTONDOWN:
consumed_event = True
if (self is not None and event.type == pygame.MOUSEBUTTONDOWN
and event.button in [
pygame.BUTTON_LEFT, pygame.BUTTON_MIDDLE,
pygame.BUTTON_RIGHT
]):
scaled_mouse_pos = self.ui_manager.calculate_scaled_mouse_position(
event.pos)
edge_hovered = (self.edge_hovering[0] or self.edge_hovering[1]
or self.edge_hovering[2] or self.edge_hovering[3])
if (self.is_enabled and event.button == pygame.BUTTON_LEFT
and edge_hovered):
self.resizing_mode_active = True
self.start_resize_point = scaled_mouse_pos
self.start_resize_rect = self.rect.copy()
consumed_event = True
elif self.hover_point(scaled_mouse_pos[0], scaled_mouse_pos[1]):
consumed_event = True
if (self is not None and event.type == pygame.MOUSEBUTTONUP
and event.button == pygame.BUTTON_LEFT
and self.resizing_mode_active):
self.resizing_mode_active = False
if (event.type == pygame.USEREVENT
and event.user_type == UI_BUTTON_PRESSED
and event.ui_element == self.close_window_button):
self.kill()
return consumed_event
def check_clicked_inside_or_blocking(self,
event: pygame.event.Event) -> bool:
"""
A quick event check outside of the normal event processing so that this window is brought
to the front of the window stack if we click on any of the elements contained within it.
:param event: The event to check.
:return: returns True if the event represents a click inside this window or the window
is blocking.
"""
consumed_event = False
if self.is_blocking and event.type == pygame.MOUSEBUTTONDOWN:
consumed_event = True
if event.type == pygame.MOUSEBUTTONDOWN and event.button == 1:
scaled_mouse_pos = self.ui_manager.calculate_scaled_mouse_position(
event.pos)
if self.hover_point(scaled_mouse_pos[0], scaled_mouse_pos[1]) or (
self.edge_hovering[0] or self.edge_hovering[1]
or self.edge_hovering[2] or self.edge_hovering[3]):
if self.is_enabled and self.bring_to_front_on_focused:
self.window_stack.move_window_to_front(self)
consumed_event = True
return consumed_event
def update(self, time_delta: float):
"""
A method called every update cycle of our application. Designed to be overridden by
derived classes but also has a little functionality to make sure the window's layer
'thickness' is accurate and to handle window resizing.
:param time_delta: time passed in seconds between one call to this method and the next.
"""
super().update(time_delta)
# This is needed to keep the window in sync with the container after adding elements to it
if self._window_root_container.layer_thickness != self.layer_thickness:
self.layer_thickness = self._window_root_container.layer_thickness
if self.title_bar is not None:
if self.title_bar.held:
mouse_x, mouse_y = self.ui_manager.get_mouse_position()
if not self.grabbed_window:
self.window_stack.move_window_to_front(self)
self.grabbed_window = True
self.starting_grab_difference = (mouse_x - self.rect.x,
mouse_y - self.rect.y)
current_grab_difference = (mouse_x - self.rect.x,
mouse_y - self.rect.y)
adjustment_required = (current_grab_difference[0] -
self.starting_grab_difference[0],
current_grab_difference[1] -
self.starting_grab_difference[1])
self.set_relative_position(
(self.relative_rect.x + adjustment_required[0],
self.relative_rect.y + adjustment_required[1]))
else:
self.grabbed_window = False
if self.resizing_mode_active:
self._update_drag_resizing()
def _update_drag_resizing(self):
"""
Re-sizes a window that is being dragged around its the edges by the mouse.
"""
x_pos = self.rect.left
y_pos = self.rect.top
x_dimension = self.rect.width
y_dimension = self.rect.height
mouse_x, mouse_y = self.ui_manager.get_mouse_position()
x_diff = mouse_x - self.start_resize_point[0]
y_diff = mouse_y - self.start_resize_point[1]
if y_dimension >= self.minimum_dimensions[1]:
y_pos = self.start_resize_rect.y
y_dimension = self.start_resize_rect.height
if self.edge_hovering[1]:
y_dimension = self.start_resize_rect.height - y_diff
y_pos = self.start_resize_rect.y + y_diff
elif self.edge_hovering[3]:
y_dimension = self.start_resize_rect.height + y_diff
if y_dimension < self.minimum_dimensions[1]:
if y_diff > 0:
y_pos = self.rect.bottom - self.minimum_dimensions[1]
else:
y_pos = self.rect.top
if x_dimension >= self.minimum_dimensions[0]:
x_pos = self.start_resize_rect.x
x_dimension = self.start_resize_rect.width
if self.edge_hovering[0]:
x_dimension = self.start_resize_rect.width - x_diff
x_pos = self.start_resize_rect.x + x_diff
elif self.edge_hovering[2]:
x_dimension = self.start_resize_rect.width + x_diff
if x_dimension < self.minimum_dimensions[0]:
if x_diff > 0:
x_pos = self.rect.right - self.minimum_dimensions[0]
else:
x_pos = self.rect.left
x_dimension = max(self.minimum_dimensions[0],
min(self.ui_container.rect.width, x_dimension))
y_dimension = max(self.minimum_dimensions[1],
min(self.ui_container.rect.height, y_dimension))
self.set_position((x_pos, y_pos))
self.set_dimensions((x_dimension, y_dimension))
def get_container(self) -> IUIContainerInterface:
"""
Returns the container that should contain all the UI elements in this window.
:return UIContainer: The window's container.
"""
return self.window_element_container
def can_hover(self) -> bool:
"""
Called to test if this window can be hovered.
"""
return not (self.resizing_mode_active or
(self.title_bar is not None and self.title_bar.held))
# noinspection PyUnusedLocal
def check_hover(self, time_delta: float,
hovered_higher_element: bool) -> bool:
"""
For the window the only hovering we care about is the edges if this is a resizable window.
:param time_delta: time passed in seconds between one call to this method and the next.
:param hovered_higher_element: Have we already hovered an element/window above this one.
"""
hovered = False
if not self.resizing_mode_active:
self.edge_hovering = [False, False, False, False]
if self.alive() and self.can_hover(
) and not hovered_higher_element and self.resizable:
mouse_x, mouse_y = self.ui_manager.get_mouse_position()
# Build a temporary rect just a little bit larger than our container rect.
resize_rect = pygame.Rect(
self._window_root_container.rect.left - 4,
self._window_root_container.rect.top - 4,
self._window_root_container.rect.width + 8,
self._window_root_container.rect.height + 8)
if resize_rect.collidepoint(mouse_x, mouse_y):
if resize_rect.right > mouse_x > resize_rect.right - 6:
self.edge_hovering[2] = True
hovered = True
if resize_rect.left + 6 > mouse_x > resize_rect.left:
self.edge_hovering[0] = True
hovered = True
if resize_rect.bottom > mouse_y > resize_rect.bottom - 6:
self.edge_hovering[3] = True
hovered = True
if resize_rect.top + 6 > mouse_y > resize_rect.top:
self.edge_hovering[1] = True
hovered = True
elif self.resizing_mode_active:
hovered = True
if self.is_blocking:
hovered = True
if hovered:
hovered_higher_element = True
self.hovered = True
else:
self.hovered = False
return hovered_higher_element
def get_top_layer(self) -> int:
"""
Returns the 'highest' layer used by this window so that we can correctly place other
windows on top of it.
:return: The top layer for this window as a number (greater numbers are higher layers).
"""
return self._layer + self.layer_thickness
def change_layer(self, new_layer: int):
"""
Move this window, and it's contents, to a new layer in the UI.
:param new_layer: The layer to move to.
"""
if new_layer != self._layer:
super().change_layer(new_layer)
if self._window_root_container is not None:
self._window_root_container.change_layer(new_layer)
if self._window_root_container.layer_thickness != self.layer_thickness:
self.layer_thickness = self._window_root_container.layer_thickness
def kill(self):
"""
Overrides the basic kill() method of a pygame sprite so that we also kill all the UI
elements in this window, and remove if from the window stack.
"""
window_close_event = pygame.event.Event(
pygame.USEREVENT, {
'user_type': UI_WINDOW_CLOSE,
'ui_element': self,
'ui_object_id': self.most_specific_combined_id
})
pygame.event.post(window_close_event)
self.window_stack.remove_window(self)
self._window_root_container.kill()
super().kill()
def rebuild(self):
"""
Rebuilds the window when the theme has changed.
"""
if self._window_root_container is None:
self._window_root_container = UIContainer(
pygame.Rect(
self.relative_rect.x + self.shadow_width,
self.relative_rect.y + self.shadow_width,
self.relative_rect.width - (2 * self.shadow_width),
self.relative_rect.height - (2 * self.shadow_width)),
manager=self.ui_manager,
starting_height=1,
is_window_root_container=True,
container=None,
parent_element=self,
object_id="#window_root_container",
visible=self.visible)
if self.window_element_container is None:
window_container_rect = pygame.Rect(
self.border_width, self.title_bar_height,
(self._window_root_container.relative_rect.width -
(2 * self.border_width)),
(self._window_root_container.relative_rect.height -
(self.title_bar_height + self.border_width)))
self.window_element_container = UIContainer(
window_container_rect,
self.ui_manager,
starting_height=0,
container=self._window_root_container,
parent_element=self,
object_id="#window_element_container",
anchors={
'top': 'top',
'bottom': 'bottom',
'left': 'left',
'right': 'right'
})
theming_parameters = {
'normal_bg': self.background_colour,
'normal_border': self.border_colour,
'border_width': self.border_width,
'shadow_width': self.shadow_width,
'shape_corner_radius': self.shape_corner_radius
}
if self.shape == 'rectangle':
self.drawable_shape = RectDrawableShape(self.rect,
theming_parameters,
['normal'],
self.ui_manager)
elif self.shape == 'rounded_rectangle':
self.drawable_shape = RoundedRectangleShape(
self.rect, theming_parameters, ['normal'], self.ui_manager)
self.set_image(self.drawable_shape.get_fresh_surface())
self.set_dimensions(self.relative_rect.size)
if self.window_element_container is not None:
element_container_width = (
self._window_root_container.relative_rect.width -
(2 * self.border_width))
element_container_height = (
self._window_root_container.relative_rect.height -
(self.title_bar_height + self.border_width))
self.window_element_container.set_dimensions(
(element_container_width, element_container_height))
self.window_element_container.set_relative_position(
(self.border_width, self.title_bar_height))
if self.enable_title_bar:
if self.title_bar is not None:
self.title_bar.set_dimensions(
(self._window_root_container.relative_rect.width -
self.title_bar_close_button_width,
self.title_bar_height))
else:
title_bar_width = (
self._window_root_container.relative_rect.width -
self.title_bar_close_button_width)
self.title_bar = UIButton(
relative_rect=pygame.Rect(0, 0, title_bar_width,
self.title_bar_height),
text=self.window_display_title,
manager=self.ui_manager,
container=self._window_root_container,
parent_element=self,
object_id='#title_bar',
anchors={
'top': 'top',
'bottom': 'top',
'left': 'left',
'right': 'right'
})
self.title_bar.set_hold_range((100, 100))
if self.enable_close_button:
if self.close_window_button is not None:
close_button_pos = (-self.title_bar_close_button_width,
0)
self.close_window_button.set_dimensions(
(self.title_bar_close_button_width,
self.title_bar_height))
self.close_window_button.set_relative_position(
close_button_pos)
else:
close_rect = pygame.Rect(
(-self.title_bar_close_button_width, 0),
(self.title_bar_close_button_width,
self.title_bar_height))
self.close_window_button = UIButton(
relative_rect=close_rect,
text='╳',
manager=self.ui_manager,
container=self._window_root_container,
parent_element=self,
object_id='#close_button',
anchors={
'top': 'top',
'bottom': 'top',
'left': 'right',
'right': 'right'
})
else:
if self.close_window_button is not None:
self.close_window_button.kill()
self.close_window_button = None
else:
if self.title_bar is not None:
self.title_bar.kill()
self.title_bar = None
if self.close_window_button is not None:
self.close_window_button.kill()
self.close_window_button = None
def rebuild_from_changed_theme_data(self):
"""
Called by the UIManager to check the theming data and rebuild whatever needs rebuilding
for this element when the theme data has changed.
"""
super().rebuild_from_changed_theme_data()
has_any_changed = False
if self._check_misc_theme_data_changed(
attribute_name='shape',
default_value='rectangle',
casting_func=str,
allowed_values=['rectangle', 'rounded_rectangle']):
has_any_changed = True
if self._check_shape_theming_changed(defaults={
'border_width': 1,
'shadow_width': 15,
'shape_corner_radius': 2
}):
has_any_changed = True
background_colour = self.ui_theme.get_colour_or_gradient(
'dark_bg', self.combined_element_ids)
if background_colour != self.background_colour:
self.background_colour = background_colour
has_any_changed = True
border_colour = self.ui_theme.get_colour_or_gradient(
'normal_border', self.combined_element_ids)
if border_colour != self.border_colour:
self.border_colour = border_colour
has_any_changed = True
if self._check_title_bar_theming_changed():
has_any_changed = True
if has_any_changed:
self.rebuild()
def _check_title_bar_theming_changed(self):
"""
Check to see if any theming parameters for the title bar have changed.
:return: True if any of the theming parameters have changed.
"""
has_any_changed = False
def parse_to_bool(str_data: str):
return bool(int(str_data))
if self._check_misc_theme_data_changed(
attribute_name='enable_title_bar',
default_value=True,
casting_func=parse_to_bool):
has_any_changed = True
if self.enable_title_bar:
if self._check_misc_theme_data_changed(
attribute_name='title_bar_height',
default_value=28,
casting_func=int):
has_any_changed = True
self.title_bar_close_button_width = self.title_bar_height
if self._check_misc_theme_data_changed(
attribute_name='enable_close_button',
default_value=True,
casting_func=parse_to_bool):
has_any_changed = True
if not self.enable_close_button:
self.title_bar_close_button_width = 0
else:
self.title_bar_height = 0
return has_any_changed
def should_use_window_edge_resize_cursor(self) -> bool:
"""
Returns true if this window is in a state where we should display one of the resizing
cursors
:return: True if a resizing cursor is needed.
"""
return (self.hovered or self.resizing_mode_active) and any(
self.edge_hovering)
def get_hovering_edge_id(self) -> str:
"""
Gets the ID of the combination of edges we are hovering for use by the cursor system.
:return: a string containing the edge combination ID (e.g. xy,yx,xl,xr,yt,yb)
"""
if ((self.edge_hovering[0] and self.edge_hovering[1])
or (self.edge_hovering[2] and self.edge_hovering[3])):
return 'xy'
elif ((self.edge_hovering[0] and self.edge_hovering[3])
or (self.edge_hovering[2] and self.edge_hovering[1])):
return 'yx'
elif self.edge_hovering[0]:
return 'xl'
elif self.edge_hovering[2]:
return 'xr'
elif self.edge_hovering[3]:
return 'yb'
else:
return 'yt'
def on_moved_to_front(self):
"""
Called when a window is moved to the front of the stack.
"""
window_front_event = pygame.event.Event(
pygame.USEREVENT, {
'user_type': UI_WINDOW_MOVED_TO_FRONT,
'ui_element': self,
'ui_object_id': self.most_specific_combined_id
})
pygame.event.post(window_front_event)
def set_display_title(self, new_title: str):
"""
Set the title of the window.
:param new_title: The title to set.
"""
self.window_display_title = new_title
self.title_bar.set_text(self.window_display_title)
def disable(self):
"""
Disables the window and it's contents so it is no longer interactive.
"""
if self.is_enabled:
self.is_enabled = False
self._window_root_container.disable()
def enable(self):
"""
Enables the window and it's contents so it is interactive again.
"""
if not self.is_enabled:
self.is_enabled = True
self._window_root_container.enable()
def show(self):
"""
In addition to the base UIElement.show() - show the _window_root_container which will
propagate and show all the children.
"""
super().show()
self._window_root_container.show()
def hide(self):
"""
In addition to the base UIElement.hide() - hide the _window_root_container which will
propagate and hide all the children.
"""
super().hide()
self._window_root_container.hide()
