Struct Scrollbar 

pub struct Scrollbar { /* private fields */ }

Scrollbar renderer using wgpu

Implementations

impl Scrollbar

pub fn new( device: &Device, format: TextureFormat, width: f32, position: &str, thumb_color: [f32; 4], track_color: [f32; 4], ) -> Self

Create a new scrollbar renderer

Arguments

• device - WGPU device
• format - Texture format
• width - Scrollbar width in pixels
• position - Scrollbar position (“left” or “right”)
• thumb_color - RGBA color for thumb [r, g, b, a]
• track_color - RGBA color for track [r, g, b, a]

pub fn update( &mut self, queue: &Queue, scroll_offset: usize, visible_lines: usize, total_lines: usize, window_width: u32, window_height: u32, )

Update scrollbar position and visibility

Arguments

• scroll_offset - Current scroll offset (0 = at bottom)
• visible_lines - Number of lines visible on screen
• total_lines - Total number of lines including scrollback
• window_width - Window width in pixels
• window_height - Window height in pixels

pub fn render<'a>(&'a self, render_pass: &mut RenderPass<'a>)

Render the scrollbar (track + thumb)

pub fn update_appearance( &mut self, width: f32, thumb_color: [f32; 4], track_color: [f32; 4], )

Update scrollbar appearance (width and colors) in real-time

pub fn update_position(&mut self, position: &str)

Update scrollbar position side (left/right)

pub fn width(&self) -> f32

pub fn position_right(&self) -> bool

pub fn contains_point(&self, x: f32, y: f32) -> bool

Check if a point (in pixel coordinates) is within the scrollbar bounds

Arguments

• x - X coordinate in pixels (from left edge)
• y - Y coordinate in pixels (from top edge)

pub fn track_contains_x(&self, x: f32) -> bool

Check if a point is within the scrollbar track (any Y position)

pub fn thumb_bounds(&self) -> Option<(f32, f32)>

Get the current thumb bounds (top Y in pixels, height in pixels)

pub fn mouse_y_to_scroll_offset(&self, mouse_y: f32) -> Option<usize>

Convert a mouse Y position to a scroll offset

Arguments

• mouse_y - Desired thumb top Y coordinate in pixels (from top edge)

Returns

The scroll offset corresponding to the mouse position, or None if scrollbar is not visible

pub fn is_visible(&self) -> bool

Whether the scrollbar is currently visible