[EPUB FXL] Panning in a zoom resource is broken

[mickael-menu]

When a FXL resource is zoomed in, there's no way to move around the viewport by panning it, it's blocked.

Related issue: When rotating the device to landscape, the EPUB FXL is zoomed and clipped (since we can't pan around).

[johanpoirier]

Hello, any idea why it is blocked? Or where the issue might be?

[mickael-menu]

Not really, I didn't look into this issue yet. My first guess would be that the ViewPager's panning gesture is conflicting with the one from the WebView.

[johanpoirier]

Is the panning supposed to be handled on the Kotlin side or on the WebView/JS side?

[mickael-menu]

On the Kotlin side, by the WebView.

[johanpoirier]

Has it ever worked in the past? Reading the code, I have the feeling that it has never been implemented.

[mickael-menu]

Could be, I never saw it work.

[johanpoirier]

This line is weird:

private fun internalMove(posX: Float, posY: Float, clamp: Boolean): Boolean {
     return internalMoveBy(posX - posX, posY - posY, clamp)
}

[johanpoirier]

And this one too:

if (!NumberUtils.isEqual(posX, posX) || !NumberUtils.isEqual(posY, posY)) {