ui

Button2D(icon_fnames[, position, size])	A 2D overlay button and is of type vtkTexturedActor2D.
Checkbox(labels[, padding, font_size, …])	A 2D set of :class:’Option’ objects.
CustomInteractorStyle()	Manipulate the camera and interact with objects in the scene.
Disk2D(outer_radius[, inner_radius, center, …])	A 2D disk UI component.
FileMenu2D(directory_path[, extensions, …])	A menu to select files in the current folder.
ImageContainer2D(img_path[, position, size])	A 2D container to hold an image.
LineDoubleSlider2D([line_width, …])	A 2D Line Slider with two sliding rings.
LineSlider2D([center, initial_value, …])	A 2D Line Slider.
ListBox2D(values[, position, size, …])	UI component that allows the user to select items from a list.
ListBoxItem2D(list_box, size)	The text displayed in a listbox.
Option(label[, position, font_size])	A set of a Button2D and a TextBlock2D to act as a single option for checkboxes and radio buttons.
Panel2D(size[, position, color, opacity, align])	A 2D UI Panel.
RadioButton(labels[, padding, font_size, …])	A 2D set of :class:’Option’ objects.
RangeSlider([line_width, inner_radius, …])	A set of a LineSlider2D and a LineDoubleSlider2D.
Rectangle2D([size, position, color, opacity])	A 2D rectangle sub-classed from UI.
RingSlider2D([center, initial_value, …])	A disk slider.
TextBlock2D([text, font_size, font_family, …])	Wraps over the default vtkTextActor and helps setting the text.
TextBox2D(width, height[, text, position, …])	An editable 2D text box that behaves as a UI component.
UI([position])	An umbrella class for all UI elements.
read_viz_icons([style, fname])	Read specific icon from specific style.
set_input(vtk_object, inp)	Generic input function which takes into account VTK 5 or 6
warn	Issue a warning, or maybe ignore it or raise an exception.

Button2D

class fury.ui.Button2D(icon_fnames, position=(0, 0), size=(30, 30))

Bases: fury.ui.UI

A 2D overlay button and is of type vtkTexturedActor2D.

Currently supports:

- Multiple icons.
- Switching between icons.

__init__(icon_fnames, position=(0, 0), size=(30, 30))

Parameters:

icon_fnames : List(string, string)

((iconname, filename), (iconname, filename), ….)

position : (float, float), optional

Absolute coordinates (x, y) of the lower-left corner of the button.

size : (int, int), optional

Width and height in pixels of the button.

color

Gets the button’s color.

next_icon()

Increments the state of the Button.

Also changes the icon.

next_icon_id()

Sets the next icon ID while cycling through icons.

resize(size)

Resize the button.

Parameters:

size : (float, float)

Button size (width, height) in pixels.

scale(factor)

Scales the button.

Parameters:

factor : (float, float)

Scaling factor (width, height) in pixels.

set_icon(icon)

Modifies the icon used by the vtkTexturedActor2D.

Parameters:

icon : imageDataGeometryFilter

set_icon_by_name(icon_name)

Set the button icon using its name.

Parameters:

icon_name : str

Checkbox

class fury.ui.Checkbox(labels, padding=1, font_size=18, font_family='Arial', position=(0, 0))

Bases: fury.ui.UI

A 2D set of :class:’Option’ objects. Multiple options can be selected.

Attributes:

labels : list(string)

List of labels of each option.

options : list(Option)

List of all the options in the checkbox set.

padding : float

Gets the padding between options.

__init__(labels, padding=1, font_size=18, font_family='Arial', position=(0, 0))

Parameters:

labels : list(string)

List of labels of each option.

padding : float

The distance between two adjacent options

font_size : int

Size of the text font.

font_family : str

Currently only supports Arial.

position : (float, float)

Absolute coordinates (x, y) of the lower-left corner of the button of the first option.

font_size

Gets the font size of text.

padding

Gets the padding between options.

CustomInteractorStyle

class fury.ui.CustomInteractorStyle

Bases: vtkInteractionStylePython.vtkInteractorStyleUser

Manipulate the camera and interact with objects in the scene.

This interactor style allows the user to interactively manipulate (pan, rotate and zoom) the camera. It also allows the user to interact (click, scroll, etc.) with objects in the scene.

Several events handling methods from vtkInteractorStyleUser have been overloaded to allow the propagation of the events to the objects the user is interacting with.

In summary, while interacting with the scene, the mouse events are as follows:

- Left mouse button: rotates the camera
- Right mouse button: dollys the camera
- Mouse wheel: dollys the camera
- Middle mouse button: pans the camera

__init__()

Init.

SetInteractor(interactor)

Define new interactor.

add_active_prop(prop)

add_callback(prop, event_type, callback, priority=0, args=[])

Add a callback associated to a specific event for a VTK prop.

Parameters:

prop : vtkProp

event_type : event code

callback : function

priority : int

force_render()

Causes the renderer to refresh.

get_prop_at_event_position()

Return the prop that lays at the event position.

on_char(obj, evt)

on_key_press(obj, evt)

on_key_release(obj, evt)

on_left_button_down(obj, evt)

on_left_button_up(obj, evt)

on_middle_button_down(obj, evt)

on_middle_button_up(obj, evt)

on_mouse_move(obj, evt)

On mouse move.

on_mouse_wheel_backward(obj, evt)

On mouse wheel backward.

on_mouse_wheel_forward(obj, evt)

On mouse wheel forward.

on_right_button_down(obj, evt)

on_right_button_up(obj, evt)

propagate_event(evt, *props)

remove_active_prop(prop)

Disk2D

class fury.ui.Disk2D(outer_radius, inner_radius=0, center=(0, 0), color=(1, 1, 1), opacity=1.0)

Bases: fury.ui.UI

A 2D disk UI component.

__init__(outer_radius, inner_radius=0, center=(0, 0), color=(1, 1, 1), opacity=1.0)

Initializes a rectangle.

Parameters:

outer_radius : int

Outer radius of the disk.

inner_radius : int, optional

Inner radius of the disk. A value > 0, makes a ring.

center : (float, float), optional

Coordinates (x, y) of the center of the disk.

color : (float, float, float), optional

Must take values in [0, 1].

opacity : float, optional

Must take values in [0, 1].

color

Gets the rectangle’s color.

inner_radius

opacity

Gets the rectangle’s opacity.

outer_radius

FileMenu2D

class fury.ui.FileMenu2D(directory_path, extensions=['*'], position=(0, 0), size=(100, 300), multiselection=True, reverse_scrolling=False, font_size=20, line_spacing=1.4)

Bases: fury.ui.UI

A menu to select files in the current folder. Can go to new folder, previous folder and select multiple files.

Attributes:

extensions: [‘extension1’, ‘extension2’, ….]

To show all files, extensions=[“*”] or [“”] List of extensions to be shown as files.

listbox : :class: ‘ListBox2D’

Container for the menu.

__init__(directory_path, extensions=['*'], position=(0, 0), size=(100, 300), multiselection=True, reverse_scrolling=False, font_size=20, line_spacing=1.4)

Parameters:

extensions: list(string)

List of extensions to be shown as files.

directory_path: string

Path of the directory where this dialog should open.

position : (float, float)

Absolute coordinates (x, y) of the lower-left corner of this UI component.

size : (int, int)

Width and height in pixels of this UI component.

multiselection: {True, False}

Whether multiple values can be selected at once.

reverse_scrolling: {True, False}

If True, scrolling up will move the list of files down.

font_size: int

The font size in pixels.

line_spacing: float

Distance between listbox’s items in pixels.

directory_click_callback(i_ren, obj, listboxitem)

A callback to move into a directory if it has been clicked.

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

listboxitem: :class:`ListBoxItem2D`

get_all_file_names()

Gets file and directory names.

Returns:

all_file_names: list((string, {“directory”, “file”}))

List of all file and directory names as string.

get_directory_names()

Finds names of all directories in the current_directory

Returns:

directory_names: list(string)

List of all directory names as string.

get_file_names()

Finds names of all files in the current_directory

Returns:

file_names: list(string)

List of all file names as string.

resize(size)

scroll_callback(i_ren, obj, filemenu_item)

A callback to handle scroll and change the slot text colors.

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

filemenu_item: :class:`FileMenu2D`

set_slot_colors()

Sets the text color of the slots based on the type of element they show. Blue for directories and green for files.

ImageContainer2D

class fury.ui.ImageContainer2D(img_path, position=(0, 0), size=(100, 100))

Bases: fury.ui.UI

A 2D container to hold an image. Currently Supports: - png and jpg/jpeg images

Attributes:

size: (float, float)

Image size (width, height) in pixels.

img : vtkImageDataGeometryFilters

The image loaded from the specified path.

__init__(img_path, position=(0, 0), size=(100, 100))

Parameters:

img_path : string

Path of the image

position : (float, float), optional

Absolute coordinates (x, y) of the lower-left corner of the image.

size : (int, int), optional

Width and height in pixels of the image.

resize(size)

Resize the image.

Parameters:

size : (float, float)

image size (width, height) in pixels.

scale(factor)

Scales the image.

Parameters:

factor : (float, float)

Scaling factor (width, height) in pixels.

set_img(img)

Modifies the image used by the vtkTexturedActor2D.

Parameters:

img : imageDataGeometryFilter

LineDoubleSlider2D

class fury.ui.LineDoubleSlider2D(line_width=5, inner_radius=0, outer_radius=10, handle_side=20, center=(450, 300), length=200, initial_values=(0, 100), min_value=0, max_value=100, font_size=16, text_template='{value:.1f}', shape='disk')

Bases: fury.ui.UI

A 2D Line Slider with two sliding rings. Useful for setting min and max values for something.

Currently supports: - Setting positions of both disks.

Attributes:

line_width : int

Width of the line on which the disk will slide.

length : int

Length of the slider.

track : vtkActor

The line on which the handles move.

handles : [vtkActor, vtkActor]

The moving slider disks.

text : [TextBlock2D, TextBlock2D]

The texts that show the values of the disks.

shape : string

Describes the shape of the handle. Currently supports ‘disk’ and ‘square’.

default_color : (float, float, float)

Color of the handles when in unpressed state.

active_color : (float, float, float)

Color of the handles when they are pressed.

__init__(line_width=5, inner_radius=0, outer_radius=10, handle_side=20, center=(450, 300), length=200, initial_values=(0, 100), min_value=0, max_value=100, font_size=16, text_template='{value:.1f}', shape='disk')

Parameters:

line_width : int

Width of the line on which the disk will slide.

inner_radius : int

Inner radius of the handles (if disk).

outer_radius : int

Outer radius of the handles (if disk).

handle_side : int

Side length of the handles (if sqaure).

center : (float, float)

Center of the slider.

length : int

Length of the slider.

initial_values : (float, float)

Initial values of the two handles.

min_value : float

Minimum value of the slider.

max_value : float

Maximum value of the slider.

font_size : int

Size of the text to display alongside the slider (pt).

text_template : str, callable

If str, text template can contain one or multiple of the replacement fields: {value:}, {ratio:}. If callable, this instance of :class:LineDoubleSlider2D will be passed as argument to the text template function.

shape : string

Describes the shape of the handle. Currently supports ‘disk’ and ‘square’.

coord_to_ratio(coord)

Converts the x coordinate of a disk to the ratio

Parameters:

coord : float

format_text(disk_number)

Returns formatted text to display along the slider.

Parameters:

disk_number : Index of the disk.

handle_move_callback(i_ren, vtkactor, slider)

Actual handle movement.

Parameters:

i_ren : CustomInteractorStyle

vtkactor : vtkActor

The picked actor

slider : LineDoubleSlider2D

handle_release_callback(i_ren, vtkactor, slider)

Change color when handle is released.

Parameters:

i_ren : CustomInteractorStyle

vtkactor : vtkActor

The picked actor

slider : LineDoubleSlider2D

left_disk_ratio

Returns the ratio of the left disk.

left_disk_value

Returns the value of the left disk.

left_x_position

ratio_to_coord(ratio)

Converts the ratio to the absolute coordinate.

Parameters:

ratio : float

ratio_to_value(ratio)

Converts the ratio to the value of the disk.

Parameters:

ratio : float

right_disk_ratio

Returns the ratio of the right disk.

right_disk_value

Returns the value of the right disk.

right_x_position

set_position(position, disk_number)

Sets the disk’s position.

Parameters:

position : (float, float)

The absolute position of the disk (x, y).

disk_number : int

The index of disk being moved.

update(disk_number)

Updates the slider.

Parameters:

disk_number : Index of the disk to be updated.

value_to_ratio(value)

Converts the value of a disk to the ratio

Parameters:

value : float

LineSlider2D

class fury.ui.LineSlider2D(center=(0, 0), initial_value=50, min_value=0, max_value=100, length=200, line_width=5, inner_radius=0, outer_radius=10, handle_side=20, font_size=16, text_template='{value:.1f} ({ratio:.0%})', shape='disk')

Bases: fury.ui.UI

A 2D Line Slider.

A sliding handle on a line with a percentage indicator.

Attributes:

line_width : int

Width of the line on which the disk will slide.

length : int

Length of the slider.

track : Rectangle2D

The line on which the slider’s handle moves.

handle : Disk2D

The moving part of the slider.

text : TextBlock2D

The text that shows percentage.

shape : string

Describes the shape of the handle. Currently supports ‘disk’ and ‘square’.

default_color : (float, float, float)

Color of the handle when in unpressed state.

active_color : (float, float, float)

Color of the handle when it is pressed.

__init__(center=(0, 0), initial_value=50, min_value=0, max_value=100, length=200, line_width=5, inner_radius=0, outer_radius=10, handle_side=20, font_size=16, text_template='{value:.1f} ({ratio:.0%})', shape='disk')

Parameters:

center : (float, float)

Center of the slider’s center.

initial_value : float

Initial value of the slider.

min_value : float

Minimum value of the slider.

max_value : float

Maximum value of the slider.

length : int

Length of the slider.

line_width : int

Width of the line on which the disk will slide.

inner_radius : int

Inner radius of the handles (if disk).

outer_radius : int

Outer radius of the handles (if disk).

handle_side : int

Side length of the handles (if sqaure).

font_size : int

Size of the text to display alongside the slider (pt).

text_template : str, callable

If str, text template can contain one or multiple of the replacement fields: {value:}, {ratio:}. If callable, this instance of :class:LineSlider2D will be passed as argument to the text template function.

shape : string

Describes the shape of the handle. Currently supports ‘disk’ and ‘square’.

format_text()

Returns formatted text to display along the slider.

handle_move_callback(i_ren, vtkactor, slider)

Actual handle movement.

Parameters:

i_ren : CustomInteractorStyle

vtkactor : vtkActor

The picked actor

slider : LineSlider2D

handle_release_callback(i_ren, vtkactor, slider)

Change color when handle is released.

Parameters:

i_ren : CustomInteractorStyle

vtkactor : vtkActor

The picked actor

slider : LineSlider2D

left_x_position

ratio

right_x_position

set_position(position)

Sets the disk’s position.

Parameters:

position : (float, float)

The absolute position of the disk (x, y).

track_click_callback(i_ren, vtkactor, slider)

Update disk position and grab the focus.

Parameters:

i_ren : CustomInteractorStyle

vtkactor : vtkActor

The picked actor

slider : LineSlider2D

update()

Updates the slider.

value

ListBox2D

class fury.ui.ListBox2D(values, position=(0, 0), size=(100, 300), multiselection=True, reverse_scrolling=False, font_size=20, line_spacing=1.4)

Bases: fury.ui.UI

UI component that allows the user to select items from a list.

Attributes:

on_change: function

Callback function for when the selected items have changed.

__init__(values, position=(0, 0), size=(100, 300), multiselection=True, reverse_scrolling=False, font_size=20, line_spacing=1.4)

Parameters:

values: list of objects

Values used to populate this listbox. Objects must be castable to string.

position : (float, float)

Absolute coordinates (x, y) of the lower-left corner of this UI component.

size : (int, int)

Width and height in pixels of this UI component.

multiselection: {True, False}

Whether multiple values can be selected at once.

reverse_scrolling: {True, False}

If True, scrolling up will move the list of files down.

font_size: int

The font size in pixels.

line_spacing: float

Distance between listbox’s items in pixels.

clear_selection()

down_button_callback(i_ren, obj, list_box)

Pressing down button scrolls down in the combo box.

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

list_box: :class:`ListBox2D`

resize(size)

scroll_click_callback(i_ren, obj, rect_obj)

Callback to change the color of the bar when it is clicked.

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

rect_obj: :class:`Rectangle2D`

scroll_drag_callback(i_ren, obj, rect_obj)

Dragging scroll bar in the combo box.

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

rect_obj: :class:`Rectangle2D`

scroll_release_callback(i_ren, obj, rect_obj)

Callback to change the color of the bar when it is released.

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

rect_obj: :class:`Rectangle2D`

select(item, multiselect=False, range_select=False)

Select the item.

Parameters:

item: ListBoxItem2D’s object

Item to select.

multiselect: {True, False}

If True and multiselection is allowed, the item is added to the selection. Otherwise, the selection will only contain the provided item unless range_select is True.

range_select: {True, False}

If True and multiselection is allowed, all items between the last selected item and the current one will be added to the selection. Otherwise, the selection will only contain the provided item unless multi_select is True.

up_button_callback(i_ren, obj, list_box)

Pressing up button scrolls up in the combo box.

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

list_box: :class:`ListBox2D`

update()

Refresh listbox’s content.

update_scrollbar()

Change the scroll-bar height when the values in the listbox change

ListBoxItem2D

class fury.ui.ListBoxItem2D(list_box, size)

Bases: fury.ui.UI

The text displayed in a listbox.

__init__(list_box, size)

Parameters:

list_box: :class:`ListBox`

The ListBox reference this text belongs to.

size: int

The size of the listbox item.

deselect()

element

left_button_clicked(i_ren, obj, list_box_item)

A callback to handle left click for this UI element.

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

list_box_item: :class:`ListBoxItem2D`

select()

Option

class fury.ui.Option(label, position=(0, 0), font_size=18)

Bases: fury.ui.UI

A set of a Button2D and a TextBlock2D to act as a single option for checkboxes and radio buttons. Clicking the button toggles its checked/unchecked status.

Attributes:

label : str

The label for the option.

font_size : int

Font Size of the label.

__init__(label, position=(0, 0), font_size=18)

Parameters:

label : str

Text to be displayed next to the option’s button.

position : (float, float)

Absolute coordinates (x, y) of the lower-left corner of the button of the option.

font_size : int

Font size of the label.

deselect()

select()

toggle(i_ren, obj, element)

Panel2D

class fury.ui.Panel2D(size, position=(0, 0), color=(0.1, 0.1, 0.1), opacity=0.7, align='left')

Bases: fury.ui.UI

A 2D UI Panel.

Can contain one or more UI elements.

Attributes:

alignment : [left, right]

Alignment of the panel with respect to the overall screen.

__init__(size, position=(0, 0), color=(0.1, 0.1, 0.1), opacity=0.7, align='left')

Parameters:

size : (int, int)

Size (width, height) in pixels of the panel.

position : (float, float)

Absolute coordinates (x, y) of the lower-left corner of the panel.

color : (float, float, float)

Must take values in [0, 1].

opacity : float

Must take values in [0, 1].

align : [left, right]

Alignment of the panel with respect to the overall screen.

add_element(element, coords, anchor='position')

Adds a UI component to the panel.

The coordinates represent an offset from the lower left corner of the panel.

Parameters:

element : UI

The UI item to be added.

coords : (float, float) or (int, int)

If float, normalized coordinates are assumed and they must be between [0,1]. If int, pixels coordinates are assumed and it must fit within the panel’s size.

color

left_button_dragged(i_ren, obj, panel2d_object)

left_button_pressed(i_ren, obj, panel2d_object)

opacity

re_align(window_size_change)

Re-organises the elements in case the window size is changed.

Parameters:

window_size_change : (int, int)

New window size (width, height) in pixels.

remove_element(element)

Removes a UI component from the panel.

Parameters:

element : UI

The UI item to be removed.

resize(size)

Sets the panel size.

Parameters:

size : (float, float)

Panel size (width, height) in pixels.

update_element(element, coords, anchor='position')

Updates the position of a UI component in the panel.

Parameters:

element : UI

The UI item to be updated.

coords : (float, float) or (int, int)

New coordinates. If float, normalized coordinates are assumed and they must be between [0,1]. If int, pixels coordinates are assumed and it must fit within the panel’s size.

RadioButton

class fury.ui.RadioButton(labels, padding=1, font_size=18, font_family='Arial', position=(0, 0))

Bases: fury.ui.Checkbox

A 2D set of :class:’Option’ objects. Only one option can be selected.

Attributes:

labels : list(string)

List of labels of each option.

options : list(Option)

List of all the options in the checkbox set.

padding : float

Gets the padding between options.

__init__(labels, padding=1, font_size=18, font_family='Arial', position=(0, 0))

Parameters:

labels : list(string)

List of labels of each option.

padding : float

The distance between two adjacent options

font_size : int

Size of the text font.

font_family : str

Currently only supports Arial.

position : (float, float)

Absolute coordinates (x, y) of the lower-left corner of the button of the first option.

RangeSlider

class fury.ui.RangeSlider(line_width=5, inner_radius=0, outer_radius=10, handle_side=20, range_slider_center=(450, 400), value_slider_center=(450, 300), length=200, min_value=0, max_value=100, font_size=16, range_precision=1, value_precision=2, shape='disk')

Bases: fury.ui.UI

A set of a LineSlider2D and a LineDoubleSlider2D. The double slider is used to set the min and max value for the LineSlider2D

Attributes:

range_slider_center : (float, float)

Center of the LineDoubleSlider2D object.

value_slider_center : (float, float)

Center of the LineSlider2D object.

range_slider : LineDoubleSlider2D

The line slider which sets the min and max values

value_slider : LineSlider2D

The line slider which sets the value

__init__(line_width=5, inner_radius=0, outer_radius=10, handle_side=20, range_slider_center=(450, 400), value_slider_center=(450, 300), length=200, min_value=0, max_value=100, font_size=16, range_precision=1, value_precision=2, shape='disk')

Parameters:

line_width : int

Width of the slider tracks

inner_radius : int

Inner radius of the handles.

outer_radius : int

Outer radius of the handles.

handle_side : int

Side length of the handles (if sqaure).

range_slider_center : (float, float)

Center of the LineDoubleSlider2D object.

value_slider_center : (float, float)

Center of the LineSlider2D object.

length : int

Length of the sliders.

min_value : float

Minimum value of the double slider.

max_value : float

Maximum value of the double slider.

font_size : int

Size of the text to display alongside the sliders (pt).

range_precision : int

Number of decimal places to show the min and max values set.

value_precision : int

Number of decimal places to show the value set on slider.

shape : string

Describes the shape of the handle. Currently supports ‘disk’ and ‘square’.

range_slider_handle_move_callback(i_ren, obj, slider)

Actual movement of range_slider’s handles.

Parameters:

i_ren : CustomInteractorStyle

obj : vtkActor

The picked actor

slider : RangeSlider

Rectangle2D

class fury.ui.Rectangle2D(size=(0, 0), position=(0, 0), color=(1, 1, 1), opacity=1.0)

Bases: fury.ui.UI

A 2D rectangle sub-classed from UI.

__init__(size=(0, 0), position=(0, 0), color=(1, 1, 1), opacity=1.0)

Initializes a rectangle.

Parameters:

size : (int, int)

The size of the rectangle (width, height) in pixels.

position : (float, float)

Coordinates (x, y) of the lower-left corner of the rectangle.

color : (float, float, float)

Must take values in [0, 1].

opacity : float

Must take values in [0, 1].

color

Gets the rectangle’s color.

height

opacity

Gets the rectangle’s opacity.

resize(size)

Sets the button size.

Parameters:

size : (float, float)

Button size (width, height) in pixels.

width

RingSlider2D

class fury.ui.RingSlider2D(center=(0, 0), initial_value=180, min_value=0, max_value=360, slider_inner_radius=40, slider_outer_radius=44, handle_inner_radius=0, handle_outer_radius=10, font_size=16, text_template='{ratio:.0%}')

Bases: fury.ui.UI

A disk slider.

A disk moves along the boundary of a ring. Goes from 0-360 degrees.

Attributes:

mid_track_radius: float

Distance from the center of the slider to the middle of the track.

previous_value: float

Value of Rotation of the actor before the current value.

track : Disk2D

The circle on which the slider’s handle moves.

handle : Disk2D

The moving part of the slider.

text : TextBlock2D

The text that shows percentage.

default_color : (float, float, float)

Color of the handle when in unpressed state.

active_color : (float, float, float)

Color of the handle when it is pressed.

__init__(center=(0, 0), initial_value=180, min_value=0, max_value=360, slider_inner_radius=40, slider_outer_radius=44, handle_inner_radius=0, handle_outer_radius=10, font_size=16, text_template='{ratio:.0%}')

Parameters:

center : (float, float)

Position (x, y) of the slider’s center.

initial_value : float

Initial value of the slider.

min_value : float

Minimum value of the slider.

max_value : float

Maximum value of the slider.

slider_inner_radius : int

Inner radius of the base disk.

slider_outer_radius : int

Outer radius of the base disk.

handle_outer_radius : int

Outer radius of the slider’s handle.

handle_inner_radius : int

Inner radius of the slider’s handle.

font_size : int

Size of the text to display alongside the slider (pt).

text_template : str, callable

If str, text template can contain one or multiple of the replacement fields: {value:}, {ratio:}, {angle:}. If callable, this instance of :class:RingSlider2D will be passed as argument to the text template function.

angle

Angle (in rad) the handle makes with x-axis

format_text()

Returns formatted text to display along the slider.

handle_move_callback(i_ren, obj, slider)

Move the slider’s handle.

Parameters:

i_ren : CustomInteractorStyle

obj : vtkActor

The picked actor

slider : RingSlider2D

handle_release_callback(i_ren, obj, slider)

Change color when handle is released.

Parameters:

i_ren : CustomInteractorStyle

vtkactor : vtkActor

The picked actor

slider : RingSlider2D

mid_track_radius

move_handle(click_position)

Moves the slider’s handle.

Parameters:

click_position: (float, float)

Position of the mouse click.

previous_value

ratio

track_click_callback(i_ren, obj, slider)

Update disk position and grab the focus.

Parameters:

i_ren : CustomInteractorStyle

obj : vtkActor

The picked actor

slider : RingSlider2D

update()

Updates the slider.

value

TextBlock2D

class fury.ui.TextBlock2D(text='Text Block', font_size=18, font_family='Arial', justification='left', vertical_justification='bottom', bold=False, italic=False, shadow=False, color=(1, 1, 1), bg_color=None, position=(0, 0))

Bases: fury.ui.UI

Wraps over the default vtkTextActor and helps setting the text.

Contains member functions for text formatting.

Attributes:

actor : vtkTextActor

The text actor.

message : str

Gets message from the text.

position : (float, float)

Gets text actor position.

color : (float, float, float)

Gets text color.

bg_color : (float, float, float)

RGB: Values must be between 0-1.

font_size : int

Gets text font size.

font_family : str

Gets font family.

justification : str

Gets text justification.

vertical_justification : str

Gets text vertical justification.

bold : bool

Returns whether the text is bold.

italic : bool

Returns whether the text is italicised.

shadow : bool

Returns whether the text has shadow.

__init__(text='Text Block', font_size=18, font_family='Arial', justification='left', vertical_justification='bottom', bold=False, italic=False, shadow=False, color=(1, 1, 1), bg_color=None, position=(0, 0))

Parameters:

text : str

The initial text while building the actor.

position : (float, float)

(x, y) in pixels.

color : (float, float, float)

RGB: Values must be between 0-1.

bg_color : (float, float, float)

RGB: Values must be between 0-1.

font_size : int

Size of the text font.

font_family : str

Currently only supports Arial.

justification : str

left, right or center.

vertical_justification : str

bottom, middle or top.

bold : bool

Makes text bold.

italic : bool

Makes text italicised.

shadow : bool

Adds text shadow.

background_color

Gets background color.

Returns:

(float, float, float) or None

If None, there no background color. Otherwise, background color in RGB.

bold

Returns whether the text is bold.

Returns:

bool

Text is bold if True.

color

Gets text color.

Returns:

(float, float, float)

Returns text color in RGB.

font_family

Gets font family.

Returns:

str

Text font family.

font_size

Gets text font size.

Returns:

int

Text font size.

italic

Returns whether the text is italicised.

Returns:

bool

Text is italicised if True.

justification

Gets text justification.

Returns:

str

Text justification.

message

Gets message from the text.

Returns:

str

The current text message.

position

Gets text actor position.

Returns:

(float, float)

The current actor position. (x, y) in pixels.

shadow

Returns whether the text has shadow.

Returns:

bool

Text is shadowed if True.

vertical_justification

Gets text vertical justification.

Returns:

str

Text vertical justification.

TextBox2D

class fury.ui.TextBox2D(width, height, text='Enter Text', position=(100, 10), color=(0, 0, 0), font_size=18, font_family='Arial', justification='left', bold=False, italic=False, shadow=False)

Bases: fury.ui.UI

An editable 2D text box that behaves as a UI component.

Currently supports: - Basic text editing. - Cursor movements. - Single and multi-line text boxes. - Pre text formatting (text needs to be formatted beforehand).

Attributes:

text : str

The current text state.

actor : vtkActor2d

The text actor.

width : int

The number of characters in a single line of text.

height : int

The number of lines in the textbox.

window_left : int

Left limit of visible text in the textbox.

window_right : int

Right limit of visible text in the textbox.

caret_pos : int

Position of the caret in the text.

init : bool

Flag which says whether the textbox has just been initialized.

__init__(width, height, text='Enter Text', position=(100, 10), color=(0, 0, 0), font_size=18, font_family='Arial', justification='left', bold=False, italic=False, shadow=False)

Parameters:

width : int

The number of characters in a single line of text.

height : int

The number of lines in the textbox.

text : str

The initial text while building the actor.

position : (float, float)

(x, y) in pixels.

color : (float, float, float)

RGB: Values must be between 0-1.

font_size : int

Size of the text font.

font_family : str

Currently only supports Arial.

justification : str

left, right or center.

bold : bool

Makes text bold.

italic : bool

Makes text italicised.

shadow : bool

Adds text shadow.

add_character(character)

Inserts a character into the text and moves window and caret.

Parameters:

character : str

edit_mode()

Turns on edit mode.

handle_character(character)

Main driving function that handles button events.

# TODO: Need to handle all kinds of characters like !, +, etc.

Parameters:

character : str

key_press(i_ren, obj, textbox_object)

Key press handler for textbox

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

textbox_object: :class:`TextBox2D`

left_button_press(i_ren, obj, textbox_object)

Left button press handler for textbox

Parameters:

i_ren: :class:`CustomInteractorStyle`

obj: :class:`vtkActor`

The picked actor

textbox_object: :class:`TextBox2D`

left_move_left()

Moves left boundary of the text window left-wards.

left_move_right()

Moves left boundary of the text window right-wards.

move_caret_left()

Moves the caret towards left.

move_caret_right()

Moves the caret towards right.

move_left()

Handles left button press.

move_right()

Handles right button press.

remove_character()

Removes a character and moves window and caret accordingly.

render_text(show_caret=True)

Renders text after processing.

Parameters:

show_caret : bool

Whether or not to show the caret.

right_move_left()

Moves right boundary of the text window left-wards.

right_move_right()

Moves right boundary of the text window right-wards.

set_message(message)

Set custom text to textbox.

Parameters:

message: str

The custom message to be set.

showable_text(show_caret)

Chops out text to be shown on the screen.

Parameters:

show_caret : bool

Whether or not to show the caret.

width_set_text(text)

Adds newlines to text where necessary.

This is needed for multi-line text boxes.

Parameters:

text : str

The final text to be formatted.

Returns:

str

A multi line formatted text.

UI

class fury.ui.UI(position=(0, 0))

Bases: object

An umbrella class for all UI elements.

While adding UI elements to the renderer, we go over all the sub-elements that come with it and add those to the renderer automatically.

Attributes:

position : (float, float)

Absolute coordinates (x, y) of the lower-left corner of this UI component.

center : (float, float)

Absolute coordinates (x, y) of the center of this UI component.

size : (int, int)

Width and height in pixels of this UI component.

on_left_mouse_button_pressed: function

Callback function for when the left mouse button is pressed.

on_left_mouse_button_released: function

Callback function for when the left mouse button is released.

on_left_mouse_button_clicked: function

Callback function for when clicked using the left mouse button (i.e. pressed -> released).

on_left_mouse_button_dragged: function

Callback function for when dragging using the left mouse button.

on_right_mouse_button_pressed: function

Callback function for when the right mouse button is pressed.

on_right_mouse_button_released: function

Callback function for when the right mouse button is released.

on_right_mouse_button_clicked: function

Callback function for when clicking using the right mouse button (i.e. pressed -> released).

on_right_mouse_button_dragged: function

Callback function for when dragging using the right mouse button.

on_key_press: function

Callback function for when a keyboard key is pressed.

__init__(position=(0, 0))

Parameters:

position : (float, float)

Absolute coordinates (x, y) of the lower-left corner of this UI component.

actors

Actors composing this UI component.

add_callback(prop, event_type, callback, priority=0)

Adds a callback to a specific event for this UI component.

Parameters:

prop : vtkProp

The prop on which is callback is to be added.

event_type : string

The event code.

callback : function

The callback function.

priority : int

Higher number is higher priority.

add_to_renderer(ren)

Allows UI objects to add their own props to the renderer.

Parameters:

ren : renderer

center

handle_events(actor)

static key_press_callback(i_ren, obj, self)

static left_button_click_callback(i_ren, obj, self)

static left_button_release_callback(i_ren, obj, self)

static mouse_move_callback(i_ren, obj, self)

position

static right_button_click_callback(i_ren, obj, self)

static right_button_release_callback(i_ren, obj, self)

set_visibility(visibility)

Sets visibility of this UI component.

size

read_viz_icons

fury.ui.read_viz_icons(style='icomoon', fname='infinity.png')

Read specific icon from specific style.

Parameters:

style : str

Current icon style. Default is icomoon.

fname : str

Filename of icon. This should be found in folder HOME/.fury/style/. Default is infinity.png.

Returns:

path : str

Complete path of icon.

set_input

fury.ui.set_input(vtk_object, inp)

Generic input function which takes into account VTK 5 or 6

Parameters:

vtk_object: vtk object

inp: vtkPolyData or vtkImageData or vtkAlgorithmOutput

Returns:

vtk_object

Notes

This can be used in the following way::

from fury.utils import set_input poly_mapper = set_input(vtk.vtkPolyDataMapper(), poly_data)

warn

fury.ui.warn()

Issue a warning, or maybe ignore it or raise an exception.