private void ScrollTheView(bool move)
{
if (_frameBaseY == null)
{
_frameBaseY = View.Frame.Y;
}
// scroll the view up or down
UIView.BeginAnimations(string.Empty, System.IntPtr.Zero);
UIView.SetAnimationDuration(0.3);
CGRect frame = View.Frame;
if (move)
{
frame.Y += _scrollDistance;
}
else
{
frame.Y = _frameBaseY.Value;
_scrollDistance = 0;
}
View.Frame = frame;
UIView.CommitAnimations();
}
/// <summary>
/// Wraps the specified <see cref="UIStackView"/> and generates a <see cref="UIView"/>.
/// </summary>
/// <param name="stackView">The specified <see cref="UIStackView"/>.</param>
/// <param name="width">The specified, optional width of the target <see cref="UIView"/>.</param>
/// <param name="height">The specified, optional height of the target <see cref="UIView"/>.</param>
/// <param name="horizontalConstraint">The constraint attribute on the horizontal axis.</param>
/// <param name="verticalConstraint">The constraint attribute on the vertical axis.</param>
/// <returns>The generated <see cref="UIView"/>.</returns>
public static UIView WrapStackView(UIStackView stackView, nfloat?width, nfloat?height,
NSLayoutAttribute horizontalConstraint, NSLayoutAttribute verticalConstraint)
{
var wrapper = new UIView();
if (width.HasValue)
{
wrapper.WidthAnchor.ConstraintEqualTo(width.Value).Active = true;
}
if (height.HasValue)
{
wrapper.HeightAnchor.ConstraintEqualTo(height.Value).Active = true;
}
var centerXConstraint = NSLayoutConstraint.Create(stackView, horizontalConstraint, NSLayoutRelation.Equal,
wrapper, horizontalConstraint, 1f, 0f);
var centerYConstraint = NSLayoutConstraint.Create(stackView, verticalConstraint, NSLayoutRelation.Equal,
wrapper, verticalConstraint, 1f, 0f);
wrapper.AddSubview(stackView);
wrapper.AddConstraints(new[]
{
centerXConstraint,
centerYConstraint
});
wrapper.TranslatesAutoresizingMaskIntoConstraints = false;
wrapper.SizeToFit();
wrapper.LayoutIfNeeded();
ConfigureStackViewAccessibilityAttributes(wrapper);
return(wrapper);
}
protected override bool Validating()
{
if (_defaultColor == null)
{
var firstRelationship = _sourceBindingRelationships.FirstOrDefault();
if (firstRelationship.Value != null)
{
var firstView = firstRelationship.Value.FirstOrDefault();
if (firstView != null)
{
_defaultColor = firstView.Layer.BorderColor;
_defaultWidth = firstView.Layer.BorderWidth;
}
}
}
if (_sourceBindingRelationships == null)
{
return(false);
}
foreach (var textView in _sourceBindingRelationships.SelectMany(sourceBindingRelationship => sourceBindingRelationship.Value))
{
textView.Layer.BorderColor = _defaultColor;
textView.Layer.BorderWidth = _defaultWidth.GetValueOrDefault();
}
return(true);
}
protected BaseTableViewSource(UITableView tableView, IReactiveNotifyCollectionChanged <TViewModel> collection,
Foundation.NSString cellKey, nfloat height, nfloat?heightHint = null, Action <UITableViewCell> initializeCellAction = null)
: base(tableView, collection, cellKey, (float)height, initializeCellAction)
{
tableView.RowHeight = height;
tableView.EstimatedRowHeight = heightHint ?? tableView.EstimatedRowHeight;
}
public static IEnumerable <FluentLayout> FullSizeOf(
[NotNull] this UIView view,
[NotNull] UIView parent,
[NotNull] IUILayoutSupport topLayoutGuide,
[NotNull] IUILayoutSupport bottomLayoutGuide,
[CanBeNull] nfloat?margin = null)
{
if (view == null)
{
throw new ArgumentNullException(nameof(view));
}
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
if (topLayoutGuide == null)
{
throw new ArgumentNullException(nameof(topLayoutGuide));
}
if (bottomLayoutGuide == null)
{
throw new ArgumentNullException(nameof(bottomLayoutGuide));
}
return(FullSizeOf(view, parent, topLayoutGuide, bottomLayoutGuide, new Margins((float)margin.GetValueOrDefault(DefaultMargin))));
}
protected ReactiveTableViewSource(UITableView tableView, nfloat height, nfloat?heightHint = null)
: base(tableView)
{
tableView.RowHeight = height;
tableView.EstimatedRowHeight = heightHint ?? tableView.EstimatedRowHeight;
this.WhenAnyValue(x => x.Data).IsNotNull().Select(x => x.Count == 0).Subscribe(_isEmptySubject.OnNext);
}
/**
* Close the Menu component with animation options.
* - Parameter duration: The time for each view's animation.
* - Parameter delay: A delay time for each view's animation.
* - Parameter usingSpringWithDamping: A damping ratio for the animation.
* - Parameter initialSpringVelocity: The initial velocity for the animation.
* - Parameter options: Options to pass to the animation.
* - Parameter animations: An animation block to execute on each view's animation.
* - Parameter completion: A completion block to execute on each view's animation.
*/
public void Close(double duration = 0.15, double delay = 0, nfloat?usingSpringWithDamping = null, nfloat initialSpringVelocity = default(nfloat), UIViewAnimationOptions options = default(UIViewAnimationOptions), Action <UIView> animations = null, Action <UIView> completion = null)
{
usingSpringWithDamping = usingSpringWithDamping ?? 0.5f;
if (IsEnabled)
{
disable();
switch (Direction)
{
case MenuDirection.Up:
{
closeUpAnimation(duration, delay, usingSpringWithDamping.Value, initialSpringVelocity, options, animations, completion);
}
break;
case MenuDirection.Down:
{
closeDownAnimation(duration, delay, usingSpringWithDamping.Value, initialSpringVelocity, options, animations, completion);
}
break;
case MenuDirection.Left:
{
closeLeftAnimation(duration, delay, usingSpringWithDamping.Value, initialSpringVelocity, options, animations, completion);
}
break;
case MenuDirection.Right:
{
closeRightAnimation(duration, delay, usingSpringWithDamping.Value, initialSpringVelocity, options, animations, completion);
}
break;
}
}
}
void FlipView_Scrolled(object sender, EventArgs e)
{
var pageWidth = this.Frame.Size.Width;
var page = (int)Math.Floor((this.ContentOffset.X - pageWidth / 2) / pageWidth) + 1;
this.PageControl.CurrentPage = page;
//Debugger.Log(1, "FlipView", page.ToString());
//左右滑动时，不知道目标页是哪个
//只能设置 Next / GoTo 的目标位置
//滚动到目标位置后，把 TargetX 设置为 null
//当左右滑动的时候， TargetX 一直是 null，这样就可以判断到底是滑动，还是程序跳转了
if (this.ContentOffset.X == this.TargetX)
{
this.TargetX = null;
}
if (TargetX == null)
{
if (this.PosChanged != null)
{
this.PosChanged.Invoke(this, new FlipViewPosChangedEventArgs()
{
Pos = page
});
}
}
}
protected virtual iOSXenkoView CreateView(CGRect bounds, nfloat?contentScaleFactor = null)
{
// create the xenko game view
return(new iOSXenkoView((RectangleF)bounds)
{
ContentScaleFactor = contentScaleFactor ?? UIScreen.MainScreen.Scale
});
}
public static UIFont ToUIFont(this string fontfamilary, nfloat?fontSize = null)
{
try {
return(UIFont.FromName(fontfamilary, fontSize ?? UIFont.SystemFontSize));
} catch {
return(UIFont.PreferredBody);
}
}
public static void ChangeFrame(this UIView control, nfloat?x = null, nfloat?y = null, nfloat?w = null, nfloat?h = null)
{
x = x ?? control.Frame.X;
y = y ?? control.Frame.Y;
w = w ?? control.Frame.Width;
h = h ?? control.Frame.Height;
control.Frame = new CGRect(x.Value, y.Value, w.Value, h.Value);
}
/// <summary>
/// Resizes the rectangle.
/// </summary>
/// <returns>The frame.</returns>
/// <param name="frame">Frame.</param>
/// <param name="x">The x coordinate.</param>
/// <param name="y">The y coordinate.</param>
/// <param name="width">Width.</param>
/// <param name="height">Height.</param>
internal static CGRect ResizeRect(this CGRect frame, nfloat?x = null, nfloat?y = null, nfloat?width = null, nfloat?height = null)
{
frame.X = x ?? frame.X;
frame.Y = y ?? frame.Y;
frame.Width = width ?? frame.Width;
frame.Height = height ?? frame.Height;
return(frame);
}
protected virtual iOSStrideView CreateView(CGRect bounds, nfloat?contentScaleFactor = null)
{
// create the stride game view
var rect = new System.Drawing.RectangleF((float)bounds.X, (float)bounds.Y, (float)bounds.Height, (float)bounds.Width);
return(new iOSStrideView(rect)
{
ContentScaleFactor = contentScaleFactor ?? UIScreen.MainScreen.Scale
});
}
/// <summary>
/// Делает SizeToFit и задает получившуюся высоту
/// </summary>
/// <returns>Bottom position of view</returns>
/// <param name="view">View.</param>
/// <param name = "yPosition">Можно задать позицию, которая будет после выполнения SizeTofit</param>
/// <param name = "saveDefaultWidth">Сохраняет значение предустановленной ширины представления</param>
/// <param name = "minHeight">Есть возможность задать минимальную высоту. В случае, если высота после SizeToFit будет меньше заданной, будет использоваться minHeight</param>
public static nfloat ResizeView(this UIView view, nfloat?yPosition = null, bool saveDefaultWidth = true, float minHeight = 0)
{
var defaultWidth = view.Frame.Width;
view.SizeToFit();
view.ChangeFrame(y: yPosition ?? view.Frame.Y,
w: saveDefaultWidth ? defaultWidth : view.Frame.Width,
h: (minHeight > 0 && view.Frame.Height < minHeight) ? minHeight : view.Frame.Height);
return(view.Frame.Bottom);
}
/// <summary>
/// Based on iOS settings of text size in General->Accessibility->LargerText.
/// This overload was created to better work with memoized functions
/// </summary>
/// <param name="size"></param>
/// <param name="basePreferredSize"></param>
/// <returns></returns>
private static nfloat GetScaledFontSize(nfloat size, nfloat?basePreferredSize)
{
//We need to scale the font size depending on the PreferredBody size. This is modified by accessibility settings.
//https://developer.xamarin.com/api/member/MonoTouch.UIKit.UIFont.GetPreferredFontForTextStyle/
if (FeatureConfiguration.Font.IgnoreTextScaleFactor)
{
return(size);
}
return(size * (basePreferredSize / DefaultUIFontPreferredBodyFontSize) ?? (float)1.0);
}
public static void SetDimensions(this _View view, nfloat?width = null, nfloat?height = null)
{
if (nfloat.IsNaN(width ?? 0) || nfloat.IsNaN(height ?? 0))
{
view.Log().ErrorFormat("A view Frame must not be set to [{0};{1}], overriding to [0;0]", width, height);
width = 0;
height = 0;
}
view.Frame = new CGRect(view.Frame.X, view.Frame.Y, width ?? view.Frame.Width, height ?? view.Frame.Height);
}
public void Goto(int idx)
{
var offset = this.ContentOffset;
offset.X = this.Frame.Size.Width * idx;
if (offset.X >= this.ContentSize.Width)
{
offset.X = 0;
}
this.TargetX = offset.X;
this.SetContentOffset(offset, true);
}
public void Next()
{
var offset = this.ContentOffset;
offset.X += this.Frame.Size.Width;
if (offset.X >= this.ContentSize.Width)
{
offset.X = 0;
}
this.TargetX = offset.X;
this.SetContentOffset(offset, true);
}
public static IEnumerable <FluentLayout> FullSizeOf(
[NotNull] this UIView view,
[NotNull] UILayoutGuide safeAreaLayoutGuide,
[CanBeNull] nfloat?margin = null)
{
if (view == null)
{
throw new ArgumentNullException(nameof(view));
}
if (safeAreaLayoutGuide == null)
{
throw new ArgumentNullException(nameof(safeAreaLayoutGuide));
}
return(FullSizeOf(view, safeAreaLayoutGuide, new Margins((float)margin.GetValueOrDefault(DefaultMargin))));
}
public static void Init()
{
if (_scale.HasValue)
{
return;
}
ImageService.Instance.Config.MainThreadDispatcher.PostAsync(() =>
{
#if __IOS__
_scale = UIKit.UIScreen.MainScreen.Scale;
#elif __MACOS__
_scale = AppKit.NSScreen.MainScreen.BackingScaleFactor;
#endif
}).ConfigureAwait(false).GetAwaiter().GetResult();;
}
public static async Task InitAsync()
{
if (_scale.HasValue)
{
return;
}
var dispatcher = ImageService.Instance.Config.MainThreadDispatcher;
await dispatcher.PostAsync(() =>
{
#if __IOS__ || __TVOS__
_scale = UIKit.UIScreen.MainScreen.Scale;
#elif __MACOS__
_scale = AppKit.NSScreen.MainScreen.BackingScaleFactor;
#endif
}).ConfigureAwait(false);
}
public static CABasicAnimation ScaleZ(nfloat?scale = null, double?duration = null)
{
var animation = CABasicAnimation.FromKeyPath("transform.scale.z");
if (scale != null)
{
animation.To = NSNumber.FromNFloat(scale.Value);
}
animation.FillMode = Convert.MaterialAnimationFillModeToValue(MaterialAnimationFillMode.Forwards);
animation.RemovedOnCompletion = false;
animation.TimingFunction = CAMediaTimingFunction.FromName(CAMediaTimingFunction.EaseInEaseOut);
if (duration != null)
{
animation.Duration = duration.Value;
}
return(animation);
}
public void MaximumReferenceExtendedDynamicRangeColorComponentValueNoMainThread()
{
if (NSScreen.MainScreen == null)
{
Assert.Inconclusive("Could not find main screen.");
}
var called = new AutoResetEvent(false);
nfloat?factor = null;
var backgroundThread = new Thread(() => {
factor = NSScreen.MainScreen.MaximumReferenceExtendedDynamicRangeColorComponentValue;
called.Set();
});
backgroundThread.Start();
Assert.IsTrue(called.WaitOne(1000), "called");
Assert.IsTrue(factor.HasValue, "factor");
}
public void BackingScaleFactorNoMainThread()
{
if (NSScreen.MainScreen == null)
{
Assert.Inconclusive("Could not find main screen.");
}
var called = new AutoResetEvent(false);
nfloat?factor = null;
var backgroundThread = new Thread(() => {
factor = NSScreen.MainScreen.BackingScaleFactor;
called.Set();
});
backgroundThread.Start();
Assert.IsTrue(called.WaitOne(1000), "called");
Assert.IsTrue(factor.HasValue, "factor");
}
private void OnScrolled(UITableView tableView)
{
var point = tableView.PanGestureRecognizer.TranslationInView(tableView);
var difference = _lastY - point.Y;
nfloat?newConstant = null;
if (HeaderViewTopConstraint.Constant - difference <= -HeaderView.Frame.Height)
{
// Stop the adjustment once the header view is off the screen
newConstant = -HeaderView.Frame.Height;
}
else if (HeaderViewTopConstraint.Constant - difference >= 0 && tableView.ContentOffset.Y <= 0)
{
// Stop the adjustment once the header view is fully in view
newConstant = 0;
}
else
{
if (difference <= 0 && tableView.ContentOffset.Y <= 0)
{
// Only move the header view back out if we're at the top
newConstant = HeaderViewTopConstraint.Constant -= difference;
}
else if (difference >= 0 && tableView.ContentOffset.Y >= 0)
{
// Move the header view out whenever we're scrolling down
newConstant = HeaderViewTopConstraint.Constant - difference;
}
}
// Adjust the constraint per the user's scroll
if (newConstant.HasValue)
{
HeaderViewTopConstraint.Constant = newConstant.Value;
}
// Track the current position
_lastY = point.Y;
}
public static CABasicAnimation RotateX(nfloat?angle = null, nfloat?rotation = null, double?duration = null)
{
var animation = CABasicAnimation.FromKeyPath("transform.rotation.x");
if (angle != null)
{
animation.To = NSNumber.FromDouble(Math.PI * angle.Value / 180.0);
}
else if (rotation != null)
{
animation.To = NSNumber.FromDouble(Math.PI * 2 * rotation.Value);
}
animation.FillMode = Convert.MaterialAnimationFillModeToValue(MaterialAnimationFillMode.Forwards);
animation.RemovedOnCompletion = false;
animation.TimingFunction = CAMediaTimingFunction.FromName(CAMediaTimingFunction.EaseInEaseOut);
if (duration != null)
{
animation.Duration = duration.Value;
}
return(animation);
}
//helper method to create constraints based on existing constraints
NSLayoutConstraint GetConstraint(
NSLayoutConstraint constraint,
NSObject object1 = null,
NSLayoutAttribute?attribute1 = null,
NSLayoutRelation?relation = null,
NSObject object2 = null,
NSLayoutAttribute?attribute2 = null,
nfloat?multiplier = null,
nfloat?constant = null)
{
if (constraint == null)
{
return(null);
}
return(NSLayoutConstraint.Create(
object1 ?? constraint.FirstItem,
(attribute1 == null) ? constraint.FirstAttribute : attribute1.Value,
(relation == null) ? constraint.Relation : relation.Value,
object2 ?? constraint.SecondItem,
(attribute2 == null) ? constraint.SecondAttribute : attribute2.Value,
(multiplier == null) ? constraint.Multiplier : multiplier.Value,
(constant == null) ? constraint.Constant : constant.Value));
}
protected override bool Validating()
{
if (_defaultColor == null)
{
var firstRelationship = _sourceBindingRelationships.FirstOrDefault();
if (firstRelationship.Value != null)
{
var firstView = firstRelationship.Value.FirstOrDefault();
if (firstView != null)
{
_defaultColor = firstView.Layer.BorderColor;
_defaultWidth = firstView.Layer.BorderWidth;
}
}
}
if (_sourceBindingRelationships == null) return false;
foreach (var textView in _sourceBindingRelationships.SelectMany(sourceBindingRelationship => sourceBindingRelationship.Value))
{
textView.Layer.BorderColor = _defaultColor;
textView.Layer.BorderWidth = _defaultWidth.GetValueOrDefault();
}
return true;
}
/// Returns size for item considering number of rows and scroll direction, if preferredWidthOrHeight is nil, square size is returned
public CGSize SizeForItem(int numberOfItemsInRow, nfloat?preferredWidthOrHeight,
UICollectionView collectionView,
UICollectionViewScrollDirection scrollDirection)
{
switch (scrollDirection)
{
case UICollectionViewScrollDirection.Horizontal:
var itemHeight = collectionView.Frame.Height;
itemHeight -= collectionView.ContentInset.Top + collectionView.ContentInset.Bottom;
itemHeight -= (numberOfItemsInRow - 1) * Configuration.InterItemSpacing;
itemHeight /= numberOfItemsInRow;
return(new CGSize(preferredWidthOrHeight ?? itemHeight, itemHeight));
case UICollectionViewScrollDirection.Vertical:
var itemWidth = collectionView.Frame.Width;
itemWidth -= collectionView.ContentInset.Left + collectionView.ContentInset.Right;
itemWidth -= (numberOfItemsInRow - 1) * Configuration.InterItemSpacing;
itemWidth /= numberOfItemsInRow;
return(new CGSize(itemWidth, preferredWidthOrHeight ?? itemWidth));
default:
throw new ArgumentException("Should be invoked only with UICollectionViewScrollDirection");
}
}
public static nfloat GetValueOrDefault(this nfloat?value, nfloat defaultValue) => null == value ? defaultValue : value.Value;
public static nfloat GetValueOrDefault(this nfloat?value) => value.GetValueOrDefault(0);
