Struct webrender_traits::display_list::ScrollTreeNode

pub struct ScrollTreeNode {
    pub parent: Option<ScrollTreeNodeId>,
    pub scroll_info: Option<ScrollableNodeInfo>,
}

A node in a tree of scroll nodes. This may either be a scrollable node which responds to scroll events or a non-scrollable one.

Fields

parent: Option<ScrollTreeNodeId>

The index of the parent of this node in the tree. If this is None then this is the root node.

scroll_info: Option<ScrollableNodeInfo>

Scrolling data which will not be None if this is a scrolling node.

Implementations

impl ScrollTreeNode

pub fn external_id(&self) -> Option<ExternalScrollId>

Get the external id of this node.

pub fn offset(&self) -> Option<LayoutVector2D>

Get the offset id of this node if it applies.

pub fn set_offset(&mut self, new_offset: LayoutVector2D) -> bool

Set the offset for this node, returns false if this was a non-scrolling node for which you cannot set the offset.

pub fn scroll( &mut self, scroll_location: ScrollLocation, ) -> Option<(ExternalScrollId, LayoutVector2D)>

Scroll this node given a WebRender ScrollLocation. Returns a tuple that can be used to scroll an individual WebRender scroll frame if the operation actually changed an offset.

Trait Implementations

impl Debug for ScrollTreeNode

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ScrollTreeNode

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ScrollTreeNode

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.