WidgetTextureController class Widgets

Owns the gpu.Texture a WidgetTexture streams its child into.

Bind texture to any material texture slot (for example PhysicallyBasedMaterial.baseColorTexture). It is null until the first capture completes; listen for changes to pick it up (the texture object is also replaced when the capture size changes).

Captures round-trip through the CPU today (rasterize, read back, upload), so treat this as a correct-but-slow path: captures are throttled to one in flight and only run when the child subtree actually repaints, but each one costs a readback on the raster thread plus a byte upload.

Inheritance

Constructors

WidgetTextureController()

Properties

captureCount → int
Total completed captures, for diagnostics.
no setter
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
lastCaptureDuration → Duration
Wall-clock duration of the last capture round trip (rasterize, read back, upload), for diagnostics.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
texture → Texture?
The most recent capture, or null before the first one completes.
no setter

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
dispose() → void
Discards any resources used by the object.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
pointerCancel({int pointer = 0}) → void
Cancels an active pointer interaction, if any.
pointerDown(Offset uv, {int pointer = 0}) → void
Sends a pointer down at uv. Follow with pointerMove and pointerUp (or pointerCancel) to complete the interaction.
pointerMove(Offset uv, {int pointer = 0}) → void
Moves an active pointer to uv.
pointerScroll(Offset uv, Offset scrollDelta) → void
Sends a scroll at uv of scrollDelta logical pixels (positive y scrolls down), driving scrollables under that point.
pointerUp(Offset uv, {int pointer = 0}) → void
Releases an active pointer at uv.
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
requestCapture() → void
Captures the child's latest recorded content now. The trigger for WidgetUpdatePolicy.manual; under other policies it forces an immediate capture (subject to one-in-flight throttling).
tapAt(Offset uv, {int pointer = 0}) → void
Sends a complete tap (down then up) at uv.
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited