Upgrade 3-> 4 / Help / Question / Viewport about mapsui

[pauldendulk]

You could use Navigator.ZoomToBox(viewport.ToExtent()) instead

[pauldendulk]

There may be something broken with the Busy state. What if you just wait for two seconds?

[johnjore]

Tried adding 10 second delay but no change.

However I had a brain wave and added a random Height = 1000:

//Create viewport to match GPX list
var viewport = new Viewport()
{
    Width = MainActivity.mContext.Resources.DisplayMetrics.WidthPixels,
    Height = 1000
};

A full width image is now created. This was not needed on 3.x? Or I was just lucky on 3.x?

[pauldendulk]

Yes, the Width and Height need to be set. Something probably changed in the defaults. The Viewport was entirely rewritten in v4.

I tried to not set the Height in a unit test and I get an exception, so that may also have happened within your code. Make sure to attach to the Mapsui logger https://mapsui.com/documentation/logging.html.

Perhaps the Navigator.SetViewport method should be made private because it also sets the Width and Height which should not be controlled by the user but only by the MapControl.

[johnjore]

Thanks for the info! This one can probably be closed as its "just" changed behaviour between 3.x and 4.x and it somehow is working. Will probably break in 5.x when you make the method private, but that's a future bridge to cross.

I'll add logging to my project, thanks for the link, I had missed that one.

[johnjore]

Hm... Its not a drop-inn replacement. As long as I use this, it works:
Fragment_map.mapControl?.Map.Navigator.SetViewport(viewport);

I either get a square that does not have any of my gpx route, or just the narrow strip, missing left and right of the route when using viewport.ToExtend(). Will need more investigating to see what is going on here.