tessella package

Subpackages

• tessella.observer package
  • Submodules
  • tessella.observer.observable module
    • Observable
      • Observable._listeners
      • Observable.notify_listeners()
  • tessella.observer.value_notifier module
    • ValueNotifier
      • ValueNotifier._value
      • ValueNotifier._listeners
      • ValueNotifier.value
• tessella.overlay package
  • Submodules
  • tessella.overlay.overlay_manager module
    • OverlayManager
      • OverlayManager._overlays
      • OverlayManager._in_render_cycle
      • OverlayManager._processing_event
      • OverlayManager._active_renders
      • OverlayManager._root_constraints
      • OverlayManager.set_root_constraints()
      • OverlayManager.get_root_constraints()
      • OverlayManager.start_render()
      • OverlayManager.end_render()
      • OverlayManager.add_widget()
      • OverlayManager.process_event()
      • OverlayManager.remove_widget()
      • OverlayManager.render()
• tessella.widgets package
  • Subpackages
    • tessella.widgets.style package
      • Submodules
      • tessella.widgets.style.border_radius module
      • tessella.widgets.style.border_style module
      • tessella.widgets.style.button_style module
      • tessella.widgets.style.checkbox_style module
      • tessella.widgets.style.container_style module
      • tessella.widgets.style.dropdown_style module
      • tessella.widgets.style.font_style module
      • tessella.widgets.style.palette module
      • tessella.widgets.style.radio_style module
      • tessella.widgets.style.slider_style module
      • tessella.widgets.style.switch_style module
      • tessella.widgets.style.text_style module
      • tessella.widgets.style.text_field_style module
      • tessella.widgets.style.text_wrap_style module
  • Submodules
  • tessella.widgets.align module
    • Align
      • Align.alignment
      • Align.calculate_size()
      • Align.depends_on_child_size()
      • Align.depends_on_parent_size()
  • tessella.widgets.button module
    • ButtonState
      • ButtonState.gesture_key
    • Button
      • Button.text
      • Button.width
      • Button.height
      • Button.style
      • Button.on_click
      • Button.create_state()
      • Button.build()
  • tessella.widgets.center module
    • Center
  • tessella.widgets.checkbox module
    • CheckboxState
      • CheckboxState.is_active
      • CheckboxState.is_hovered
    • Checkbox
      • Checkbox.on_changed
      • Checkbox.height
      • Checkbox.style
      • Checkbox.initial_value
      • Checkbox.create_state()
      • Checkbox.on_click()
      • Checkbox.on_hover_start()
      • Checkbox.on_hover_end()
      • Checkbox.build()
  • tessella.widgets.column module
    • Column
      • Column.children
      • Column.main_axis_alignment
      • Column.cross_axis_alignment
      • Column.shrink_wrap
      • Column.calculate_size()
      • Column.render()
      • Column.depends_on_parent_size()
      • Column.depends_on_child_size()
  • tessella.widgets.container module
    • Container
      • Container.width
      • Container.height
      • Container.child
      • Container.style
      • Container.get_bitmask()
      • Container.collidepoint()
      • Container.calculate_size()
      • Container.depends_on_child_size()
      • Container.depends_on_parent_size()
  • tessella.widgets.dropdown module
    • DropdownItem
    • DropdownState
      • DropdownState.is_open
      • DropdownState.selected_entry
      • DropdownState.hovered_entry
      • DropdownState.is_hovered
    • Dropdown
      • Dropdown.items
      • Dropdown._width
      • Dropdown._height
      • Dropdown.overlay
      • Dropdown.keys
      • Dropdown.main_key
      • Dropdown.style
      • Dropdown.create_state()
      • Dropdown.open_or_close()
      • Dropdown.on_entry_hover()
      • Dropdown.on_hover_start()
      • Dropdown.on_hover_end()
      • Dropdown.calculate_size()
      • Dropdown.on_click_outside()
      • Dropdown.build_overlay()
      • Dropdown.set_position()
      • Dropdown.on_entry_selected()
      • Dropdown.build()
  • tessella.widgets.enums module
    • PositionalAlignment
      • PositionalAlignment.TOP_LEFT
      • PositionalAlignment.TOP_CENTER
      • PositionalAlignment.TOP_RIGHT
      • PositionalAlignment.CENTER_LEFT
      • PositionalAlignment.CENTER
      • PositionalAlignment.CENTER_RIGHT
      • PositionalAlignment.BOTTOM_LEFT
      • PositionalAlignment.BOTTOM_CENTER
      • PositionalAlignment.BOTTOM_RIGHT
    • MainAxisAlignment
      • MainAxisAlignment.START
      • MainAxisAlignment.CENTER
      • MainAxisAlignment.END
      • MainAxisAlignment.SPACE_BETWEEN
      • MainAxisAlignment.SPACE_AROUND
      • MainAxisAlignment.SPACE_EVENLY
    • CrossAxisAlignment
      • CrossAxisAlignment.START
      • CrossAxisAlignment.CENTER
      • CrossAxisAlignment.END
    • ClipBehavior
      • ClipBehavior.NONE
      • ClipBehavior.CLIP
    • ImageFit
      • ImageFit.CONTAIN
      • ImageFit.COVER
      • ImageFit.STRETCH
    • SliderOrientation
      • SliderOrientation.HORIZONTAL
      • SliderOrientation.VERTICAL
    • TextAlign
      • TextAlign.LEFT
      • TextAlign.RIGHT
      • TextAlign.CENTER
    • ScrollbarBehavior
      • ScrollbarBehavior.AUTO
      • ScrollbarBehavior.HIDDEN
      • ScrollbarBehavior.ALWAYS_VISIBLE
  • tessella.widgets.flexible module
    • Flexible
      • Flexible.flex_factor
      • Flexible.calculate_size()
      • Flexible.depends_on_child_size()
      • Flexible.depends_on_parent_size()
  • tessella.widgets.gesture_detector module
    • GestureDetectorState
      • GestureDetectorState.is_pressed
      • GestureDetectorState.is_hovered
    • GestureDetector
      • GestureDetector.on_click
      • GestureDetector.on_hover_start
      • GestureDetector.on_hover_end
      • GestureDetector.on_click_outside
      • GestureDetector.on_drag_start
      • GestureDetector.on_dragging
      • GestureDetector.on_drag_end
      • GestureDetector.child
      • GestureDetector.create_state()
      • GestureDetector.build()
      • GestureDetector.process_event()
  • tessella.widgets.image module
    • Image
      • Image.image
      • Image.width
      • Image.height
      • Image.scale_ratio
      • Image.fit
      • Image.smooth_scale
      • Image.calculate_size()
      • Image.depends_on_parent_size()
  • tessella.widgets.listener module
    • Listener
      • Listener.observable
      • Listener.builder
      • Listener.child
      • Listener.calculate_size()
      • Listener.dispose()
      • Listener.update_child()
      • Listener.depends_on_parent_size()
      • Listener.depends_on_child_size()
  • tessella.widgets.multi_child_widget module
    • MultiChildWidget
      • MultiChildWidget.children
      • MultiChildWidget.request_relayout()
      • MultiChildWidget.process_event()
      • MultiChildWidget.update()
      • MultiChildWidget.render()
      • MultiChildWidget.dispose()
      • MultiChildWidget.set_position()
      • MultiChildWidget.depends_on_child_size()
  • tessella.widgets.overlay module
    • Overlay
      • Overlay.active
      • Overlay.dispose()
      • Overlay.calculate_size()
      • Overlay.depends_on_child_size()
      • Overlay.depends_on_parent_size()
  • tessella.widgets.padding module
    • EdgeInsets
      • EdgeInsets.left
      • EdgeInsets.top
      • EdgeInsets.right
      • EdgeInsets.bottom
      • EdgeInsets.symmetric()
      • EdgeInsets.all()
      • EdgeInsets.get_horizontal_padding()
      • EdgeInsets.get_vertical_padding()
    • Padding
      • Padding.padding
      • Padding.child
      • Padding.calculate_size()
      • Padding.render()
      • Padding.depends_on_child_size()
      • Padding.depends_on_parent_size()
  • tessella.widgets.placeholder module
    • Placeholder
      • Placeholder.width
      • Placeholder.height
      • Placeholder.box_color
      • Placeholder.box_thickness
      • Placeholder.visible
      • Placeholder.calculate_size()
      • Placeholder.depends_on_parent_size()
  • tessella.widgets.positioned module
    • Positioned
      • Positioned.left
      • Positioned.right
      • Positioned.top
      • Positioned.bottom
      • Positioned.set_position()
      • Positioned.calculate_size()
      • Positioned.depends_on_child_size()
      • Positioned.depends_on_parent_size()
  • tessella.widgets.radio module
    • RadioState
      • RadioState.is_hovered
      • RadioState.gesture_key
    • Radio
      • Radio.value
      • Radio.group_value
      • Radio.on_changed
      • Radio.size
      • Radio.style
      • Radio.dispose()
      • Radio.create_state()
      • Radio.on_click()
      • Radio.on_hover_start()
      • Radio.on_hover_end()
      • Radio.build()
  • tessella.widgets.row module
    • Row
      • Row.children
      • Row.main_axis_alignment
      • Row.cross_axis_alignment
      • Row.shrink_wrap
      • Row.calculate_size()
      • Row.render()
      • Row.depends_on_parent_size()
      • Row.depends_on_child_size()
  • tessella.widgets.scrollable module
    • ScrollableState
      • ScrollableState.scroll_key
      • ScrollableState.offset
      • ScrollableState.built
    • Scrollable
      • Scrollable.inner_child
      • Scrollable.scroll_style
      • Scrollable.scroll_behavior
      • Scrollable.create_state()
      • Scrollable.calculate_size()
      • Scrollable.update()
      • Scrollable.dispose()
      • Scrollable.process_event()
      • Scrollable.build()
  • tessella.widgets.single_child_widget module
    • SingleChildWidget
      • SingleChildWidget.child
      • SingleChildWidget.has_child()
      • SingleChildWidget.request_relayout()
      • SingleChildWidget.process_event()
      • SingleChildWidget.update()
      • SingleChildWidget.render()
      • SingleChildWidget.dispose()
      • SingleChildWidget.set_position()
      • SingleChildWidget.depends_on_child_size()
  • tessella.widgets.sized_box module
    • SizedBox
      • SizedBox.width
      • SizedBox.height
      • SizedBox.child
      • SizedBox.calculate_size()
      • SizedBox.depends_on_child_size()
      • SizedBox.depends_on_parent_size()
  • tessella.widgets.slider module
    • SliderState
      • SliderState.gesture_key
      • SliderState.thumb_position
    • Slider
      • Slider.thickness
      • Slider.min_value
      • Slider.max_value
      • Slider.initial_value
      • Slider.on_changed
      • Slider.snap
      • Slider.orientation
      • Slider.style
      • Slider.thumb_scale
      • Slider.get_value()
      • Slider.set_value()
      • Slider.on_thumb_movement()
      • Slider.apply_layout_constraints()
      • Slider.create_state()
      • Slider.build()
  • tessella.widgets.stack module
    • Stack
      • Stack.children
      • Stack.alignment
      • Stack.clip_behavior
      • Stack.render()
      • Stack.calculate_size()
      • Stack.depends_on_child_size()
      • Stack.depends_on_parent_size()
  • tessella.widgets.stateful_widget module
    • WidgetKey
    • WidgetState
    • StatefulWidget
      • StatefulWidget.class.__state_registry
      • StatefulWidget.key
      • StatefulWidget._child
      • StatefulWidget.state
      • StatefulWidget.get_state()
      • StatefulWidget.create_state()
      • StatefulWidget.child
      • StatefulWidget.invalidate_child()
      • StatefulWidget.calculate_size()
      • StatefulWidget.depends_on_parent_size()
      • StatefulWidget.depends_on_child_size()
  • tessella.widgets.stateless_widget module
    • StatelessWidget
      • StatelessWidget.child
      • StatelessWidget.calculate_size()
      • StatelessWidget.depends_on_parent_size()
      • StatelessWidget.depends_on_child_size()
  • tessella.widgets.switch module
    • SwitchState
      • SwitchState.is_active
      • SwitchState.is_hovered
    • Switch
      • Switch.on_changed
      • Switch.height
      • Switch.style
      • Switch.create_state()
      • Switch.on_click()
      • Switch.on_hover_start()
      • Switch.on_hover_end()
      • Switch.build()
  • tessella.widgets.text module
    • Text
      • Text.text
      • Text.style
      • Text.calculate_size()
      • Text.depends_on_parent_size()
  • tessella.widgets.text_field module
    • TextEditingController
      • TextEditingController.text
      • TextEditingController.clear()
    • TextFieldState
      • TextFieldState.is_focused
      • TextFieldState.cursor_position
      • TextFieldState.selection_anchor
      • TextFieldState.cursor_visible
      • TextFieldState.blink_timer
      • TextFieldState.scroll_offset
      • TextFieldState.gesture_key
    • TextField
      • TextField.controller
      • TextField.hint_text
      • TextField.width
      • TextField.height
      • TextField.on_changed
      • TextField.on_submit
      • TextField.style
      • TextField.dispose()
      • TextField.create_state()
      • TextField.on_click_start()
      • TextField.on_click_outside()
      • TextField.update()
      • TextField.process_event()
      • TextField.build()
  • tessella.widgets.text_wrap module
    • TextWrap
      • TextWrap.text
      • TextWrap.style
      • TextWrap.word_split
      • TextWrap.split_text()
      • TextWrap.build()
  • tessella.widgets.widget module
    • Widget
      • Widget.bounds
      • Widget.surface
      • Widget.contraints
      • Widget.flex_factor
      • Widget.__is_drawn
      • Widget.__is_laid
      • Widget.in_update_cycle
      • Widget.parent
      • Widget.bitmask
      • Widget.get_bitmask()
      • Widget.collidepoint()
      • Widget.request_redraw()
      • Widget.is_drawn()
      • Widget.mark_as_drawn()
      • Widget.request_relayout()
      • Widget.is_laid()
      • Widget.mark_as_laid()
      • Widget.build()
      • Widget.calculate_layout()
      • Widget.process_event()
      • Widget.update()
      • Widget.render()
      • Widget.dispose()
      • Widget.set_position()
      • Widget.apply_layout_constraints()
      • Widget.get_bounds()
      • Widget.calculate_size()
      • Widget.depends_on_parent_size()

Submodules

tessella.constraints module

class tessella.constraints.WidgetConstraints(position_x=0, position_y=0, min_width=0, min_height=0, max_width=0, max_height=0)

Bases: object

Describes the layout constraints passed down from a parent widget to its child during the layout pass, bounding the position and the minimum/maximum size a widget is allowed to take.

Parameters:

• position_x (int)

• position_y (int)

• min_width (int)

• min_height (int)

• max_width (int)

• max_height (int)

position_x

The X coordinate available to the widget, in pixels.

Type:

int

position_y

The Y coordinate available to the widget, in pixels.

Type:

int

min_width

The minimum width the widget is allowed to take, in pixels.

Type:

int

min_height

The minimum height the widget is allowed to take, in pixels.

Type:

int

max_width

The maximum width the widget is allowed to take, in pixels.

Type:

int

max_height

The maximum height the widget is allowed to take, in pixels.

Type:

int

rect

The rect described by position_x, position_y, max_width and max_height.

Type:

pygame.Rect

classmethod from_rect(rect)

A constructor for this class which derives the constraints from a pygame.Rect, using its position as the origin and its size as the maximum bounds, with no minimum size.

Parameters:

rect (pygame.Rect) – The rect to derive the constraints from.

Returns:

A new WidgetConstraints instance.

Return type:

WidgetConstraints

copy()

Creates a copy of this instance.

Returns:

A new WidgetConstraints instance with the same attribute values as this one.

Return type:

WidgetConstraints

tessella.offset_surface module

class tessella.offset_surface.OffsetSurface(offset, size, flags=0)

Bases: Surface

A pygame.Surface that translates every blit destination by a fixed offset, allowing content to be drawn using coordinates relative to a point other than the surface’s own origin.

Parameters:

• offset (Vector2)

• size (tuple[int, int])

• flags (int)

offset

The offset subtracted from every blit destination.

Type:

pygame.Vector2

blit(source, dest, area=None, special_flags=0)

Draws source onto this surface at dest, after subtracting offset from it.

Parameters:

• source (pygame.Surface) – The surface to draw.

• dest (tuple[int, int]) – The destination coordinates, before the offset is applied.

• area (pygame.Rect | None) – The portion of source to draw. Draws the whole surface if None. Defaults to None.

• special_flags (int) – The pygame.Surface special flags to blit with. Defaults to 0.