Scroll a photo in all directions and pinch zoom-in/out.

[wendel....@xinox-apps.com]

Hi,

I was planning to use one of the ScrollViews to hold a picture which can be scrolled in all directions.  (+zoom in/out)

Apparently all Scrollable widgets are limited to either scrolling horizontal or vertical, and looking at the source code, it has never been taken in account to scroll on both axis.

Any thoughts from the developers why they missed this? 

[Ian Hickson]

We just never had a need for a widget that did this specifically, so we never got around to implementing it. It should be relatively easy to implement manually, though. You can use the GestureDetector's onScaleState, onScaleUpdate, and onScaleEnd handlers for the user interaction, in particular.

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Ian Hickson

😸

[Hans Muller]

The Flutter Gallery "Grid" demo does this, see https://github.com/flutter/flutter/blob/master/examples/flutter_gallery/lib/demo/material/grid_list_demo.dart#L39

On Sat, Nov 4, 2017 at 2:54 PM, Ian Hickson <i...@hixie.ch> wrote:

We just never had a need for a widget that did this specifically, so we never got around to implementing it. It should be relatively easy to implement manually, though. You can use the GestureDetector's onScaleState, onScaleUpdate, and onScaleEnd handlers for the user interaction, in particular.

On Sat, Nov 4, 2017 at 2:52 PM <wendel.de.witte@xinox-apps.com> wrote:

Hi,

I was planning to use one of the ScrollViews to hold a picture which can be scrolled in all directions.  (+zoom in/out)

Apparently all Scrollable widgets are limited to either scrolling horizontal or vertical, and looking at the source code, it has never been taken in account to scroll on both axis.

Any thoughts from the developers why they missed this? 

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Ian Hickson

😸

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