Struct paddle::PointerTracker

pub struct PointerTracker { /* fields omitted */ }

Helper struct that can be added to a frame to track advanced cursor updates.

This can be useful to make the cursor position available to the draw function, for example to draw hover effects. Drag gestures are also supported, to perform e.g. scrolling.

Usage: Add it as a field to a frame and then call track_pointer_event() from the mouse method of the frame. Then read e.g. position from the field in any of the frame methods.

Implementations

impl PointerTracker

pub fn new() -> Self

pub fn pos(&self) -> Option<Vector>

pub fn take_drag(&mut self) -> Option<(Vector, Vector)>

Movement from point A to point B with touch or pressed mouse.

Reading a drag with this method clears the content. While moving the cursor, a partial drag are generated each frame. When multiple drags are generated before the user clear it, they are all summarized to one single movement.

pub fn track_pointer_event(&mut self, event: &PointerEvent)

Trait Implementations

impl Clone for PointerTracker

pub fn clone(&self) -> PointerTracker

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PointerTracker

impl Debug for PointerTracker

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PointerTracker

pub fn default() -> PointerTracker

Returns the "default value" for a type.