Struct Viewport 

pub struct Viewport {
    pub width: f32,
    pub height: f32,
    pub scroll_offset: f32,
    pub total_content_height: f32,
    pub top_offset: f32,
    pub pinned_to_bottom: bool,
}

Tracks the visible portion of the block stream.

Fields

width: f32

height: f32

scroll_offset: f32

total_content_height: f32

top_offset: f32

Physical-pixel offset from the top of the window where the block stream begins. Lets a tab strip (or other chrome) render above the blocks without overlap.

pinned_to_bottom: bool

True when the user is at (or near) the bottom and auto-scroll should track new content. Set to false when the user explicitly scrolls up; restored when they return to the bottom.

Implementations

impl Viewport

pub fn new(width: f32, height: f32) -> Self

pub fn scroll(&mut self, delta: f32)

Scroll by delta pixels (positive = down).

pub fn scroll_to_top(&mut self)

Snap to the top.

pub fn scroll_to_bottom(&mut self)

Snap to the bottom (show latest content).

pub fn scroll_to(&mut self, y: f32)

Scroll so a content-space y position is visible, aligned near the top.

pub fn resize(&mut self, width: f32, height: f32)

pub fn is_visible(&self, y: f32, h: f32) -> bool

Is a y-coordinate (in content space) visible?

pub fn content_to_screen_y(&self, content_y: f32) -> f32

Convert content-space y to screen-space y.

Trait Implementations

impl Clone for Viewport

fn clone(&self) -> Viewport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Viewport

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

Formats the value using the given formatter.