Package-level declarations

Local pixel drawing clipped to this region and its ancestors. Does not clear or publish a frame.

A front-face empty-hand click in published whole-screen pixel coordinates.

A task-confined drawing recorder, valid only during its enclosing frame block.

Fixed-capacity chronological samples. NaN records a gap instead of a fabricated zero.

Pixels per installed block; the same density also applies to holes in the canvas.

Pointer lifecycle; Cancel with gesture zero cancels every captured gesture.

A retained tree in an explicit screen viewport. The caller owns polling; render owns incremental frames.

Stateless widgets: the caller polls input and owns telemetry, commands and frame publication.

One persistent RGB canvas. Drawing is clipped to its bounds and publishes immediately by default.

A handle to one persistent canvas through the legacy text grid API. Coordinates are zero-based.

Construction-only DSL. Row/column children flow in declaration order; root and at children overlap. Sizes and positions are pixels, fixed at construction. A retained builder cannot be used after construction.

A disabled button still blocks clicks. Registering or drawing a button never invokes onClick.

Local drawing and pointer surface. Call invalidate after changing captured drawing state.

A fixed-size element. Mutable presentation properties never change its layout.

Horizontal finite-range slider. Click/drag changes value; assigning value does not invoke the handler.

Creates a bounded local drawing surface at an arbitrary screen position.

Build once, then retain widget references for explicit updates. Root/leaf viewports clip drawing.

Uses whole-screen coordinates; passing a CanvasScope directly gives local clipped widgets.

Records bounded drawing packets and publishes them together. Exceptions discard the frame; nesting fails.

Returns a 24-bit 0xRRGGBB color.