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Add upgrade notes to 4.4.0 changelog

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Tim Schaub
2017-10-08 15:11:19 -06:00
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changelog/upgrade-notes.md
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### Next Release
### v4.4.0
#### Behavior change for polygon labels
Polygon labels are now only rendered when the label does not exceed the polygon at the label position. To get the old behavior, configure your `ol.style.Text` with `exceedLength: true`.

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changelog/v4.4.0.md
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The 4.4.0 release includes features and fixes from 80 pull requests, including first time contributions from @EduardoNogueira, @ath0mas, @f7o, @trevorblades, @viethang, and @wb14123. There are some really nice rendering enhancements included in this release. It is now possible to render labels along lines (see [#7239](https://github.com/openlayers/openlayers/pull/7239) for more detail) and polygon labels are only rendered if they fit within the polygon ([#7292](https://github.com/openlayers/openlayers/pull/7292)). In addition, we now render tiles with an opacity transition, so tiled layers more gracefully fade in ([#7267](https://github.com/openlayers/openlayers/pull/7267)).
### Upgrade notes
#### Behavior change for polygon labels
Polygon labels are now only rendered when the label does not exceed the polygon at the label position. To get the old behavior, configure your `ol.style.Text` with `exceedLength: true`.
#### Minor change for custom `tileLoadFunction` with `ol.source.VectorTile`
It is no longer necessary to set the projection on the tile. Instead, the `readFeatures` method must be called with the tile's extent as `extent` option and the view's projection as `featureProjection`.
Before:
```js
tile.setLoader(function() {
var data = // ... fetch data
var format = tile.getFormat();
tile.setFeatures(format.readFeatures(data));
tile.setProjection(format.readProjection(data));
// uncomment the line below for ol.format.MVT only
//tile.setExtent(format.getLastExtent());
});
```
After:
```js
tile.setLoader(function() {
var data = // ... fetch data
var format = tile.getFormat();
tile.setFeatures(format.readFeatures(data, {
featureProjection: map.getView().getProjection(),
// uncomment the line below for ol.format.MVT only
//extent: tile.getExtent()
}));
);
```
#### Deprecation of `ol.DeviceOrientation`
`ol.DeviceOrientation` is deprecated and will be removed in the next major version.
The device-orientation example has been updated to use the (gyronorm.js)[https://github.com/dorukeker/gyronorm.js] library.
## Detailed changes
See below for the full list of changes.
* [#7306](https://github.com/openlayers/openlayers/pull/7306) - Enable mouse wheel in freehand draw mode ([@trevorblades](https://github.com/trevorblades))