Scheme Link (link)¶

class orangecanvas.scheme.link.SchemeLink(source_node, source_channel, sink_node, sink_channel, enabled=True, properties=None, parent=None)¶

Bases: PyQt5.QtCore.QObject

A instantiation of a link between two SchemeNode instances in a Scheme.

Parameters:	source_node (SchemeNode) – Source node. source_channel (OutputSignal) – The source widget’s signal. sink_node (SchemeNode) – The sink node. sink_channel (InputSignal) – The sink widget’s input signal. properties (dict) – Additional link properties.

enabled_changed(enabled)¶

The link enabled state has changed

dynamic_enabled_changed(enabled)¶

The link dynamic enabled state has changed.

state_changed¶

Runtime link state has changed

class State¶

Bases: enum.IntEnum

Flags indicating the runtime state of a link

Empty = 0¶

A link is empty when it has no value on it

Active = 1¶

A link is active when the source node provides a value on output

Pending = 2¶

A link is pending when it’s sink node has not yet been notified of a change (note that Empty|Pending is a valid state)

SchemeLink.source_type()¶

Return the type of the source channel.

SchemeLink.sink_type()¶

Return the type of the sink channel.

SchemeLink.is_dynamic()¶

Is this link dynamic.

SchemeLink.set_enabled(enabled)¶

Enable/disable the link.

SchemeLink.enabled¶

Is this link enabled.

SchemeLink.set_dynamic_enabled(enabled)¶

Enable/disable the dynamic link. Has no effect if the link is not dynamic.

SchemeLink.dynamic_enabled¶

Is this a dynamic link and is dynamic_enabled set to True

SchemeLink.set_runtime_state(state)¶

Set the link’s runtime state.

Parameters:	state (SchemeLink.State) –

SchemeLink.runtime_state()¶

Returns:	state
Return type:	SchemeLink.State

SchemeLink.set_tool_tip(tool_tip)¶

Set the link tool tip.

SchemeLink.tool_tip¶

Link tool tip.