Scheme Node (node)¶

class orangecanvas.scheme.node.SchemeNode(description, title=None, position=None, properties=None, parent=None)¶

Bases: PyQt5.QtCore.QObject

A node in a Scheme.

Parameters:	description (WidgetDescription) – Node description instance. title (str, optional) – Node title string (if None description.name is used). position (tuple) – (x, y) tuple of floats for node position in a visual display. properties (dict) – Additional extra instance properties (settings, widget geometry, ...) parent (QObject) – Parent object.

title_changed(title)¶

The title of the node has changed

position_changed((x, y))¶

Position of the node in the scheme has changed

progress_changed(progress)¶

Node’s progress value has changed.

processing_state_changed(state)¶

Node’s processing state has changed.

input_channels()¶

Return a list of input channels (InputSignal) for the node.

output_channels()¶

Return a list of output channels (OutputSignal) for the node.

input_channel(name)¶

Return the input channel matching name. Raise a ValueError if not found.

output_channel(name)¶

Return the output channel matching name. Raise an ValueError if not found.

set_title(title)¶

Set the node title.

title¶

The node title.

set_position(pos)¶

Set the position ((x, y) tuple) of the node.

position¶

(x, y) tuple containing the position of the node in the scheme.

set_progress(value)¶

Set the progress value.

progress¶

The current progress value. -1 if progress is not set.

set_processing_state(state)¶

Set the node processing state.

processing_state¶

The node processing state, 0 for not processing, 1 the node is busy.

status_message_changed¶

The node’s status tip has changes

state_message_changed¶

The node’s state message has changed

set_state_message(message)¶

Set a message to be displayed by a scheme view for this node.

state_messages()¶

Return a list of all state messages.