Redrawing tiles on touch events about tileview HOT 3 CLOSED

You can request a render during a drag event, but it'll be performance hit. Both concepts are discussed in #25. The render request is already throttled by 250 milliseconds - you can tweak that if you wish, but again be careful of the work being required of the UI thread.

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I'm aware of the performance. I'd like to request render only if the drag distance is over certain limit, e.g. 100dp. However calling requestRender removes the RENDER_FLAG from a handler's message queue and adds a new one after 250ms. Since dragging the view continuously calls onDrag, the requestRender is effectively cancelling the previous requests and happens only 250ms afer thelast onDrag update (e.g. when I stop dragging the view around). Thus I'd have to add another method, e.g. requestRenderNow, that'd do it instantly. I can see there are some more performance issues raising from this approach so I'll reconsider what can be achieved here. Thanks very much for your help.

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FWIW, adding a downsample (the third argument of some addDetailLevel signatures) is the compromise for not rendering during drag/pinch. It's intended to show a low-memory version of the tiled image, scaled. Post back if that's not clear.

Also, I wouldn't necessarily be adverse to adding a "requestRenderNow" (or "requestImmediateRender") method.

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