protected async Task ScrollFlyoutToBottom(ShellRenderer shellRenderer)
{
var flyoutItems = GetFlyoutMenuReyclerView(shellRenderer);
TaskCompletionSource <object> result = new TaskCompletionSource <object>();
flyoutItems.ScrollChange += OnFlyoutItemsScrollChange;
flyoutItems.ScrollToPosition(flyoutItems.GetAdapter().ItemCount - 1);
await result.Task.WaitAsync(TimeSpan.FromSeconds(2));
await Task.Delay(10);
void OnFlyoutItemsScrollChange(object sender, AView.ScrollChangeEventArgs e)
{
flyoutItems.ScrollChange -= OnFlyoutItemsScrollChange;
result.TrySetResult(true);
}
// The appbar layout won't offset if you programmatically scroll the RecyclerView
// I haven't found a way to match the exact behavior when you touch and scroll
// I think we'd have to actually send touch events through adb
var coordinatorLayout = flyoutItems.Parent.GetParentOfType <CoordinatorLayout>();
var appbarLayout = coordinatorLayout.GetFirstChildOfType <AppBarLayout>();
var clLayoutParams = appbarLayout.LayoutParameters as CoordinatorLayout.LayoutParams;
var behavior = clLayoutParams.Behavior as AppBarLayout.Behavior;
var headerContainer = appbarLayout.GetFirstChildOfType <HeaderContainer>();
var verticalOffset = flyoutItems.ComputeVerticalScrollOffset();
behavior.OnNestedPreScroll(coordinatorLayout, appbarLayout, flyoutItems, 0, verticalOffset, new int[2], ViewCompat.TypeTouch);
await Task.Delay(10);
}
protected async Task OpenFlyout(ShellRenderer shellRenderer, TimeSpan?timeOut = null)
{
var flyoutView = GetFlyoutPlatformView(shellRenderer);
var drawerLayout = GetDrawerLayout(shellRenderer);
if (!drawerLayout.FlyoutFirstDrawPassFinished)
{
await Task.Delay(10);
}
var hamburger =
GetPlatformToolbar((IPlatformViewHandler)shellRenderer).GetChildrenOfType <AppCompatImageButton>().FirstOrDefault() ??
throw new InvalidOperationException("Unable to find Drawer Button");
timeOut = timeOut ?? TimeSpan.FromSeconds(2);
TaskCompletionSource <object> taskCompletionSource = new TaskCompletionSource <object>();
drawerLayout.DrawerOpened += OnDrawerOpened;
hamburger.PerformClick();
await taskCompletionSource.Task.WaitAsync(timeOut.Value);
void OnDrawerOpened(object sender, DrawerLayout.DrawerOpenedEventArgs e)
{
drawerLayout.DrawerOpened -= OnDrawerOpened;
taskCompletionSource.SetResult(true);
}
}
internal Graphics.Rect GetFlyoutFrame(ShellRenderer shellRenderer)
{
var platformView = GetFlyoutPlatformView(shellRenderer);
var context = platformView.Context;
return(new Graphics.Rect(0, 0,
context.FromPixels(platformView.MeasuredWidth),
context.FromPixels(platformView.MeasuredHeight)));
}
RecyclerViewContainer GetFlyoutMenuReyclerView(ShellRenderer shellRenderer)
{
IShellContext shellContext = shellRenderer;
DrawerLayout dl = shellContext.CurrentDrawerLayout;
var flyout = dl.GetChildAt(0);
RecyclerViewContainer flyoutContainer = null;
if (dl.GetChildAt(1) is ViewGroup vg1 &&
vg1.GetChildAt(0) is RecyclerViewContainer rvc)
{
flyoutContainer = rvc;
}
return(flyoutContainer ?? throw new Exception("RecyclerView not found"));
}
protected async Task CheckFlyoutState(ShellRenderer handler, bool desiredState)
{
var drawerLayout = GetDrawerLayout(handler);
var flyout = drawerLayout.GetChildAt(1);
if (drawerLayout.IsDrawerOpen(flyout) == desiredState)
{
Assert.Equal(desiredState, drawerLayout.IsDrawerOpen(flyout));
return;
}
var taskCompletionSource = new TaskCompletionSource <bool>();
flyout.LayoutChange += OnLayoutChanged;
try
{
await taskCompletionSource.Task.WaitAsync(TimeSpan.FromSeconds(2));
}
catch (TimeoutException)
{
}
flyout.LayoutChange -= OnLayoutChanged;
Assert.Equal(desiredState, drawerLayout.IsDrawerOpen(flyout));
return;
void OnLayoutChanged(object sender, Android.Views.View.LayoutChangeEventArgs e)
{
if (drawerLayout.IsDrawerOpen(flyout) == desiredState)
{
taskCompletionSource.SetResult(true);
flyout.LayoutChange -= OnLayoutChanged;
}
}
}
protected Task CheckFlyoutState(ShellRenderer renderer, bool result) => throw new NotImplementedException();
void Initialize()
{
SetEGLContextClientVersion(2);
shellRenderer = new ShellRenderer();
SetRenderer(shellRenderer);
}
ShellFlyoutRenderer GetDrawerLayout(ShellRenderer shellRenderer)
{
IShellContext shellContext = shellRenderer;
return((ShellFlyoutRenderer)shellContext.CurrentDrawerLayout);
}
internal Graphics.Rect GetFrameRelativeToFlyout(ShellRenderer shellRenderer, IView view)
{
var platformView = (view.Handler as IPlatformViewHandler).PlatformView;
return(platformView.GetFrameRelativeTo(GetFlyoutPlatformView(shellRenderer)));
}
protected AView GetFlyoutPlatformView(ShellRenderer shellRenderer)
{
var drawerLayout = GetDrawerLayout(shellRenderer);
return(drawerLayout.GetChildrenOfType <ShellFlyoutLayout>().First());
}
