Struct Canvas 

pub struct Canvas<'b, B: Backend> { /* private fields */ }

Implementations

impl<'b, B: Backend> Canvas<'b, B>

pub fn new(backend: &'b mut B) -> Self

pub fn width(&self) -> u32

pub fn height(&self) -> u32

pub fn size(&self) -> (u32, u32)

pub fn fill_rect(&mut self, x: u32, y: u32, w: u32, h: u32, color: Color)

pub fn draw_text(&mut self, x: u32, y: u32, text: &str, color: Color)

pub fn hline(&mut self, x: u32, y: u32, w: u32, color: Color)

pub fn vline(&mut self, x: u32, y: u32, h: u32, color: Color)

pub fn draw_rect(&mut self, x: u32, y: u32, w: u32, h: u32, color: Color)

pub fn clear(&mut self, color: Color)

pub fn present(&mut self)

pub fn poll_event(&mut self) -> Option<Event>

pub fn panel( &mut self, x: u32, y: u32, w: u32, h: u32, fill: Color, border: Color, )

Draw a filled rectangle with a 1-pixel border.

pub fn title_bar( &mut self, x: u32, y: u32, w: u32, h: u32, title: &str, bg: Color, )

Draw a title bar: filled strip + white text.

pub fn button( &mut self, x: u32, y: u32, w: u32, h: u32, label: &str, fill: Color, border: Color, text_color: Color, )

Draw a simple button with border, fill, and centred label.

pub fn progress_bar( &mut self, x: u32, y: u32, w: u32, h: u32, percent: u32, track: Color, fill: Color, border: Color, )

Draw a horizontal progress bar. percent is clamped to 0–100.

pub fn divider_v(&mut self, x: u32, y: u32, h: u32)

Draw a vertical divider line.

pub fn divider_h(&mut self, x: u32, y: u32, w: u32)

Draw a horizontal divider line.

pub fn centered_text( &mut self, x: u32, y: u32, w: u32, text: &str, color: Color, )

Draw text centered horizontally in a w-wide strip starting at x.

pub fn right_text(&mut self, x: u32, y: u32, w: u32, text: &str, color: Color)

Draw right-aligned text ending at x + w.

pub fn fill_rounded(&mut self, x: u32, y: u32, w: u32, h: u32, color: Color)

Fill a rounded-corner rectangle (corners are clipped by 1 pixel).

pub fn gradient_h( &mut self, x: u32, y: u32, w: u32, h: u32, left: Color, right: Color, )

Fill a horizontal gradient from left to right color across w pixels.

pub fn gradient_v( &mut self, x: u32, y: u32, w: u32, h: u32, top: Color, bottom: Color, )

Fill a vertical gradient from top to bottom color across h pixels.

pub fn shadow_panel( &mut self, x: u32, y: u32, w: u32, h: u32, fill: Color, border: Color, )

Panel with a 4-pixel dark drop shadow behind it.

pub fn accent_bar(&mut self, x: u32, y: u32, h: u32, color: Color)

3-pixel vertical accent bar — used for selection indicators.

pub fn dot(&mut self, x: u32, y: u32, color: Color)

Tiny 4×4 filled status dot.

pub fn icon_tile(&mut self, x: u32, y: u32, size: u32, bg: Color, label: &str)

Colored app icon tile: rounded background + centered label.

pub fn gradient_progress( &mut self, x: u32, y: u32, w: u32, h: u32, percent: u32, track: Color, fill_l: Color, fill_r: Color, border: Color, )

Progress bar with a two-stop horizontal gradient fill.

pub fn fill_round4(&mut self, x: u32, y: u32, w: u32, h: u32, color: Color)

Filled rectangle with 4-pixel rounded corners (AdwPreferencesGroup / card style).

pub fn toggle_switch(&mut self, x: u32, y: u32, on: bool, accent: Color)

GNOME AdwToggleSwitch (52×26 px). Knob slides left=off, right=on.

pub fn action_row( &mut self, x: u32, y: u32, w: u32, title: &str, subtitle: &str, value: &str, hovered: bool, last: bool, ) -> u32

GNOME AdwActionRow — title + optional subtitle on left, text value on right. Set last = true on the final row of a group to skip the separator. Returns the row height (52).

pub fn action_row_toggle( &mut self, x: u32, y: u32, w: u32, title: &str, subtitle: &str, on: bool, accent: Color, hovered: bool, last: bool, ) -> u32

GNOME AdwSwitchRow — action row with a toggle switch on the right. Returns the row height (52).

pub fn action_row_nav( &mut self, x: u32, y: u32, w: u32, title: &str, subtitle: &str, hovered: bool, last: bool, ) -> u32

Navigation action row — chevron on right, no value text. Returns the row height (52).

pub fn search_bar( &mut self, x: u32, y: u32, w: u32, text: &str, focused: bool, accent: Color, )

Pill-shaped search entry (height 36). Draws placeholder or query text.

pub fn gnome_headerbar( &mut self, x: u32, y: u32, w: u32, title: &str, has_back: bool, bg: Color, )

GNOME AdwHeaderBar (48 px tall) — centered title, back button, end menu button.

pub fn spinner(&mut self, cx: u32, cy: u32, frame: u32, color: Color)

8-dot animated spinner. cx/cy is the center. Frame drives rotation.

pub fn toast(&mut self, x: u32, y: u32, w: u32, message: &str, accent: Color)

Pill-shaped in-app notification toast (44 px tall).

pub fn avatar( &mut self, x: u32, y: u32, size: u32, initials: &str, color: Color, )

Circular avatar tile with initials (uses fill_round4 as circle approximation).

pub fn chip(&mut self, x: u32, y: u32, text: &str, bg: Color, fg: Color)

Small pill-shaped chip / badge label.

pub fn backend_mut(&mut self) -> &mut B

Access the underlying backend directly for operations not in Canvas.