Dowe Views Documentation

CANVAS · INPUT

Interactive input

Normalize pointer, multitouch, physical keyboard, and device motion into target-neutral event objects that drive retained command bindings.

ONE EVENT MODEL

Logical coordinates

Pointer positions are mapped back through contain, cover, or stretch before reaching your function.

ADVANCED PLAYGROUND

Bind three input sources into one scene

Move or touch the marker, focus the Canvas and press a physical key, or tilt a supported mobile device to rotate the center tile.

Pointer

The blue marker follows logical x and y coordinates.

Physical keyboard

The most recent key value replaces the scene heading.

Device motion

Screen-oriented gamma rotation turns the center tile.

COMMAND BINDINGS

Store events, then resolve shallow paths

Each function receives the event as item. A command bind object replaces selected fields immediately before drawing and preserves the static fallback when a path is missing.

signal pointer value:{ x:320 y:180 }
signal scene value:[
  { type:"circle" x:320 y:180 radius:24 fill:"primary" bind:{ x:"pointer.x" y:"pointer.y" } },
]
fn capturePointer
  set pointer source:item

Canvas scene:scene onPointer:capturePointer label:"Pointer playground" w:"full" h:96

Source	Delivery	Selected fields
No data There are no records to display

LIFECYCLE AND PERMISSIONS

Input stays scoped to the active Canvas

Pointer capture

Active pointers remain captured through up or cancel, including simultaneous touch identifiers.

Keyboard focus

A Canvas with onKey becomes focusable; pointer down gives it focus without opening a software keyboard.

Motion sensors

Sensors start only when onMotion exists. Missing or denied sensor access produces no callback.

Composition

Back to overview

No data