Xamarin.Forms 1.4.0.6341

Build native UIs for iOS, Android, and Windows Phone from a single, shared C# codebase

There is a newer version of this package available.
See the version list below for details.
Install-Package Xamarin.Forms -Version 1.4.0.6341
dotnet add package Xamarin.Forms --version 1.4.0.6341
paket add Xamarin.Forms --version 1.4.0.6341
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

## Important Notes ##

This is a feature release. As such unlike a patch version bump, the minor version bump indicates the inclusion of new APIs.

## New API ##

### ScrollView ###

It is now possible to detect the current scroll offset of the ScrollView. These are readonly bindable properties.
```csharp
public double ScrollX { get; }
public double ScrollY { get; }
```

There are also methods which can be used to perform scrolling in the ScrollView.
```csharp
public Task ScrollToAsync (double x, double y, bool animated);
public Task ScrollToAsync (Element element, bool animated);
```
The `Element` passed to `ScrollToAsync` must be a descendant of the `ScrollView` but does not have to be a direct child.

Finally for those who do not wish to use bindings to observe scrolling, there is a `Scrolled` event that fires when `ScrollX` or `ScrollY` are updated.
```csharp
public event EventHandler<ScrolledEventArgs> Scrolled;

public class ScrolledEventArgs : EventArgs
{
   public double ScrollX { get; } = 0;
   public double ScrollY { get; } = 0;
}
```
Lastly ScrollView no longer uses any internal API to communicate between the frontend and the renderer. `IScrollViewController`, which is implemented explicitly on ScrollView can be used to trigger these and other events.

### ListView ###

**Separator Enhancements**
It is now possible to enable/disable separators for the ListView. This can be configured via the `SeparatorVisibility` property, which is bindable.
```csharp
public SeparatorVisibility SeparatorVisibility { get; set; } = SeparatorVisibility.Default;

public enum SeparatorVisibility {
   Default = 0,
   None = 1,
}
```
Currently there is no option for `Always` as not all platforms have separators as part of their UX. We are considering adding this in the future, however it would be an invented paradigm for Windows platforms.

It is now possible to apply a `Color` to the separator in ListView.
```csharp
public Color SeparatorColor { get; set; } = Color.Default;
```
The default value is `Color.Default` and will function unchanged from the 1.3.0 implementation if left untouched. RGBA values are supported. This function does nothing in `SeparatorVisibility` is set to `None`. Please note that setting either of these properties on Android after loading the `ListView` incurs a large performance penalty.

**Header/Footer**
`ListView` has also grown both a Header and a Footer. These are managed through a series of properties which enable everything from simple usage to more complex MVVM style usage. With Header/Footer the primary reason developers have in the past been forced to put ListViews inside of ScrollViews is finally dead! If you are still placing a ListView inside a ScrollView we strongly suggest you consider porting.
```csharp
public object Header { get; set; } = null;
public DataTemplate HeaderTemplate { get; set; } = null;
public object Footer { get; set; } = null;
public DataTemplate FooterTemplate { get; set; } = null;
```
It is important to note that Header or Footer may be set directly to a View and the Template properties left null. This will cause the Header/Footer to be directly consumed by the renderer. All of these properties are bindable.

**Pull To Refresh**
PullToRefresh has been enabled on all current target platforms for ListView. To enable PullToRefresh in your app simple set `IsPullToRefreshEnabled` to true and make sure you respond to the correct events. It is important to note that this is the "easy" version of this API, in the future a more complete API with a standalone View may be added.
```csharp
public event EventHandler Refreshing;

public bool IsPullToRefreshEnabled { get; set; } = false;
public bool IsRefreshing { get; set; } = false;
public ICommand RefreshCommand { get; set; } = null;

public void BeginRefresh ();
public void EndRefresh ();
```
When the user triggers a `PullToRefresh` the Command will be invoked and the `Refreshed` event emitted. `IsRefreshing` will be set to true. The `ICommand.CanExecute` property is respected. The user must either call `EndRefresh` or assign `IsRefreshing` to false in order to end the refresh state.

All control parameters for these features and more are exposed through the IListViewController interface, which is explicitly implemented on ListView. This will assist those wishing to modify how these features work in custom renderers.

The Windows Phone implementation of PullToRefresh is a custom implementation as there is no platform idiom for doing this. In the future if the Windows platform decided to add a method of doing PullToRefresh by default, we intend to port.

### Forms.Application ###

The `Application` class now exposes 4 new events for dealing with Modal navigation.
```csharp
public event EventHandler<ModalPushedEventArgs> ModalPushed;
public event EventHandler<ModalPoppedEventArgs> ModalPopped;
public event EventHandler<ModalPushingEventArgs> ModalPushing;
public event EventHandler<ModalPoppingEventArgs> ModalPopping;
```
The `ModalPoppingEventArgs` contains a `Cancel` property which if set to true will cancel the Pop event and cause the application to enter the background (the operating system is informed of the unhandled back event).

In order to implement this feature, all pre-Application methods of creating a Forms app have been updated to create a default `Application` which is set as the root pages `Parent`. It is possible this may cause issues in some edge cases, if you have any issues please file a bug report. It is suggested you update your app to the new LoadApplication initialization methodology if possible.

Application now has a method of manually forcing the `Properties` dictionary to be saved to the IsolatedFileStore. This is to allow users to save their properties when it makes sense for them rather than risk them not getting serialized out due to a crash/being killed by the OS.
```csharp
public Task SavePropertiesAsync ()
```

### OpenGLRenderer ###

On Android `OpenGLRenderer` has been renamed `OpenGLViewRenderer` for consistency.

### Layout ###
Layout now contains a `ILayoutController` class which has an `IReadOnlyList<Element>` which can be used to enumerate the children of a Layout regardless of the type of the Layout.

## Other Features ##

- WebView now correctly supports javascript out of the box on Windows Phone 8.0

## Bug Fixes ##

- [Bug 27063](https://bugzilla.xamarin.com/show_bug.cgi?id=27063) - Navigation not always returning to the proper page.
- [Bug 27225](https://bugzilla.xamarin.com/show_bug.cgi?id=27225) - Secondary ToolbarItems cause app to hang during PushAsync
- [Bug 27437](https://bugzilla.xamarin.com/show_bug.cgi?id=27437) - [iOS] Context menu error after deleting an item from a ListView using ContextActions
- [Bug 27096](https://bugzilla.xamarin.com/show_bug.cgi?id=27096) - EntryCell has different fontsize on Android
- [Bug 21317](https://bugzilla.xamarin.com/show_bug.cgi?id=21317) - Stepper control .IsEnabled doesn't work on Android
- [Bug 26338](https://bugzilla.xamarin.com/show_bug.cgi?id=26338) - Unable to change page BackgroundImage from code
- [Bug 26588](https://bugzilla.xamarin.com/show_bug.cgi?id=26588) - [WinPhone] Entry does not trigger numeric keyboard when password masking is enabled
- [Bug 27072](https://bugzilla.xamarin.com/show_bug.cgi?id=27072) - Listview Context Actions not removed if a different item is tapped in Android

## Other Fixes ##

- Stepper default values now can be correctly inherited through a style.
- x:Static now correctly reports position on error in XAML.
- XAML now throws a more user friendly error on duplicate x:Name
- XAML will now use implicit operators when assigning values to properties
- XAML now supports baseclass indication for collection properties
- XAML string literals are now supported with `{}foo`
- iOS6 Modal pages should no longer sometimes have a 20px offset for no reason

Version History

Version Downloads Last updated
3.2.0.729530-pre2 777 8/14/2018
3.2.0.637442-pre1 5,235 7/17/2018
3.1.0.697729 33,192 8/1/2018
3.1.0.637273 46,080 7/11/2018
3.1.0.583944 78,396 6/20/2018
3.1.0.561732-pre4 3,957 6/11/2018
3.1.0.550168-pre3 2,039 6/6/2018
3.1.0.530888-pre2 1,090 6/4/2018
3.1.0.469394-pre1 9,035 5/9/2018
3.0.0.561731 92,621 6/11/2018
3.0.0.550146 18,834 6/6/2018
3.0.0.530893 13,323 6/4/2018
3.0.0.482510 137,208 5/14/2018
3.0.0.446417 75,658 5/1/2018
3.0.0.427558-pre4 7,031 4/25/2018
3.0.0.354232-pre3 10,301 4/5/2018
3.0.0.296286-pre2 6,949 3/20/2018
2.5.1.527436 39,047 5/4/2018
2.5.1.444934 107,954 4/4/2018
2.5.1.392594-pre3 3,460 3/21/2018
2.5.1.340284-pre2 5,038 3/9/2018
2.5.1.317207-pre1 4,904 3/1/2018
2.5.0.280555 244,667 2/16/2018
2.5.0.122203 245,009 12/18/2017
2.5.0.121934 157,996 11/28/2017
2.5.0.91635 107,064 11/16/2017
2.5.0.77107 23,401 11/13/2017
2.5.0.75255-pre3 4,649 11/10/2017
2.5.0.19271-pre2 7,829 10/20/2017
2.4.0.91020 34,213 11/16/2017
2.4.0.74863 30,910 11/10/2017
2.4.0.38779 53,929 10/30/2017
2.4.0.18342 48,862 10/20/2017
2.4.0.282 140,698 9/29/2017
2.4.0.280 141,276 9/27/2017
2.4.0.275-pre3 7,295 9/19/2017
2.4.0.269-pre2 12,472 8/29/2017
2.4.0.266-pre1 16,479 8/16/2017
2.3.5.256-pre6 30,149 6/29/2017
2.3.5.255-pre5 4,178 6/26/2017
2.3.5.239-pre3 25,937 5/11/2017
2.3.5.235-pre2 10,357 4/26/2017
2.3.5.233-pre1 8,160 4/13/2017
2.3.4.270 114,063 8/29/2017
2.3.4.267 57,095 8/16/2017
2.3.4.247 351,395 5/16/2017
2.3.4.231 189,109 4/12/2017
2.3.4.224 228,297 3/29/2017
2.3.4.221-pre6 6,591 3/27/2017
2.3.4.214-pre5 9,397 3/14/2017
2.3.4.212-pre4 5,508 3/10/2017
2.3.4.211-pre3 3,371 3/9/2017
2.3.4.192-pre2 18,115 2/3/2017
2.3.4.184-pre1 11,148 1/13/2017
2.3.3.193 216,102 2/1/2017
2.3.3.180 196,570 1/5/2017
2.3.3.175 113,070 12/6/2016
2.3.3.168 62,615 11/23/2016
2.3.3.166-pre4 6,697 11/3/2016
2.3.3.163-pre3 5,725 10/17/2016
2.3.3.152-pre2 14,253 9/15/2016
2.3.2.127 251,218 9/14/2016
2.3.2.118-pre1 6,193 8/3/2016
2.3.1.114 149,019 8/3/2016
2.3.1.113-pre3 3,185 7/19/2016
2.3.1.111-pre2 4,147 7/4/2016
2.3.1.110-pre1 1,823 6/29/2016
2.3.0.107 191,036 6/29/2016
2.3.0.49 77,439 6/16/2016
2.3.0.46-pre3 14,557 5/30/2016
2.3.0.38-pre2 11,933 4/27/2016
2.3.0.34-pre1 7,799 4/27/2016
2.2.0.45 110,701 5/30/2016
2.2.0.31 122,210 4/27/2016
2.2.0.23-pre4 2,512 4/20/2016
2.2.0.18-pre3 1,713 4/20/2016
2.2.0.5-pre2 15,353 4/8/2016
2.2.0.4-pre1 17,886 4/5/2016
2.1.0.6529 93,100 3/13/2016
2.1.0.6526 16,368 3/9/2016
2.1.0.6524 26,365 3/2/2016
2.1.0.6521 10,821 3/1/2016
2.1.0.6517-pre5 1,401 2/18/2016
2.1.0.6513-pre4 1,384 2/9/2016
2.1.0.6508-pre3 1,685 1/28/2016
2.1.0.6503-pre2 6,273 1/22/2016
2.1.0.6501-pre1 821 1/21/2016
2.1.0.6500-pre1 670 1/20/2016
2.0.1.6505 89,136 1/28/2016
2.0.1.6495 72,498 1/20/2016
2.0.1.6492-pre1 3,114 12/3/2015
2.0.0.6490 92,064 12/1/2015
2.0.0.6484 16,852 11/21/2015
2.0.0.6482 225,544 11/17/2015
1.5.2.6478-pre3 539 11/17/2015
1.5.2.6477-pre2 3,067 11/10/2015
1.5.2.6469-pre1 1,416 10/20/2015
1.5.1.6471 72,698 10/20/2015
1.5.1.6468 3,092 10/20/2015
1.5.1.6460-pre2 903 10/13/2015
1.5.1.6455-pre1 2,195 10/2/2015
1.5.0.6447 48,109 9/25/2015
1.5.0.6446 20,210 9/16/2015
1.5.0.6404-pre3 2,572 8/25/2015
1.5.0.6401-pre2 726 8/21/2015
1.5.0.6396-pre1 1,246 8/5/2015
1.4.4.6449 1,926 9/25/2015
1.4.4.6443 930 9/16/2015
1.4.4.6392 72,671 7/29/2015
1.4.4.6391 1,304 7/28/2015
1.4.4.6387 2,201 7/27/2015
1.4.4.6379-pre3 804 7/20/2015
1.4.4.6378-pre2 640 7/16/2015
1.4.4.6377-pre1 615 7/14/2015
1.4.3.6376 37,644 7/9/2015
1.4.3.6374 15,532 7/1/2015
1.4.3.6372 1,353 6/30/2015
1.4.3.6364-pre3 1,572 6/16/2015
1.4.3.6358-pre2 4,990 4/24/2015
1.4.3.6356-pre1 688 4/21/2015
1.4.2.6359 56,592 4/30/2015
1.4.2.6355 13,063 4/21/2015
1.4.2.6353-pre2 1,773 3/31/2015
1.4.2.6350-pre1 869 3/30/2015
1.4.1.6349 42,789 3/30/2015
1.4.1.6347-pre2 2,543 3/19/2015
1.4.1.6342-pre1 969 3/10/2015
1.4.0.6341 (current) 27,326 3/9/2015
1.4.0.6340-pre2 1,693 3/6/2015
1.4.0.6336-pre1 847 3/3/2015
1.3.5.6337 4,380 3/5/2015
1.3.5.6335 21,548 3/2/2015
1.3.5.6333-pre1 1,229 2/17/2015
1.3.4.6332 16,711 2/17/2015
1.3.4.6331-pre4 783 2/13/2015
1.3.4.6329-pre3 573 2/12/2015
1.3.4.6328-pre2 601 2/11/2015
1.3.4.6325-pre1 574 2/9/2015
1.3.3.6323 49,438 2/9/2015
1.3.3.6322-pre3 535 2/6/2015
1.3.3.6321-pre2 703 2/4/2015
1.3.3.6318-pre1 663 2/2/2015
1.3.2.6316 6,795 2/3/2015
1.3.2.6313-pre3 634 1/30/2015
1.3.2.6309-pre2 690 1/28/2015
1.3.2.6299-pre1 1,403 1/20/2015
1.3.1.6296 51,642 1/4/2015
1.3.1.6294-pre1 3,635 12/24/2014
1.3.0.6292 8,628 12/24/2014
1.3.0.6286-pre4 1,450 12/19/2014
1.3.0.6284-pre3 968 12/12/2014
1.3.0.6280-pre2 881 12/9/2014
1.3.0.6275-pre1 7,146 11/12/2014
1.2.3.6257 36,699 10/2/2014
1.2.3.6256-pre4 1,570 9/26/2014
1.2.3.6255-pre3 1,957 9/20/2014
1.2.3.6249-pre2 1,164 9/9/2014
1.2.3.6246-pre1 3,637 8/15/2014
1.2.2.6243 26,970 7/30/2014
1.2.2.6241-pre3 2,093 7/28/2014
1.2.2.6240-pre2 3,900 7/22/2014
1.2.2.6238-pre1 2,995 7/17/2014
1.2.1.6229 7,510 7/14/2014
1.1.1.6206 13,472 6/19/2014
1.1.0.6201 12,280 6/12/2014
1.0.6197 3,421 6/4/2014
1.0.6188 10,681 5/28/2014
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