wire_drag()

template<typename T >

void MayaFlux::Portal::Forma::Geometry::wire_drag	(	Context &	ctx,
		uint32_t	id,
		std::shared_ptr< MappedState< T > >	state,
		std::function< T(glm::vec2)>	project,
		IO::MouseButtons	btn = IO::MouseButtons::Left
	)

Register a drag handler writing a projected cursor position to state.

The projection carries the geometry-specific mapping. Kinesis::Projection supplies the inverses matching the geometry functions above: axis_fraction for the faders, unit_square for position_picker, angle_fraction for radial, path_fraction for stroke_slider.

Parameters

ctx	Context owning the element's callbacks.
id	Element id returned from create_element.
state	MappedState written on each drag event.
project	NDC to value mapping.
btn	Mouse button that must be held.

Definition at line 26 of file FormFactory.hpp.

{
    if (!state || !project)
        return;
 
    ctx.wire_drag(
        id,
        [state = std::move(state), project = std::move(project)](glm::vec2 ndc) {
            state->write(project(ndc));
        },
        btn);
}

References MayaFlux::Portal::Forma::Context::wire_drag().

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