Acknowledged
2 months ago

Request - specify if WatchUi.View.onUpdate() is required or optional

If onUpdate() calls would allow differentiating between updates that are required and that are optional, it would allow avoiding unnecessary repainting.

For example, if a watch face does not require updating every second (by showing just HH:MM), then 59 repaints every minute in high-power mode go to waste.

On the other hand, if the OS wipes the screen clean for some reason, then onUpdate() obviously must execute.

The request is to change onUpdate to include an extra parameter to specify if the update is optional or not:

onUpdate(dc as Graphics.Dc, required as Boolean) as Void

This would help writing more power-efficient code.

eau_de_vie
Parents
  • 1 month ago

    One compromise could be to use a BufferedBitmap, so you can render your image offscreen and only update the parts you need. You won't save the time that system uses to copy the BufferedBitmap to the display, but you will save the time that you would spend drawing parts of the image that haven't changed.

Comment
  • 1 month ago

    One compromise could be to use a BufferedBitmap, so you can render your image offscreen and only update the parts you need. You won't save the time that system uses to copy the BufferedBitmap to the display, but you will save the time that you would spend drawing parts of the image that haven't changed.

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