Awesome

ExpectAnimXamarin

Describe your animation and run !

new ExpectAnim()

                .Expect(avatar)
                .ToBe(
                    Expectations...
                )
                .ToAnimation()
                .Start();

#Download

This library is available on nuget

Install-Package Florent37.XamarinExpectAnim

This code describe the video above

new ExpectAnim()
	.Expect(_avatar)
	.ToBe(
		BottomOfParent().WithMarginDp(36),
		LeftOfParent().WithMarginDp(16),
		Width(40).ToDp().KeepRatio())
	.Expect(_name)
	.ToBe(
		ToRightOf(_avatar).WithMarginDp(16),
		SameCenterVerticalAs(_avatar),
		ToHaveTextColor(Color.White)
	)

	.Expect(_subname)
	.ToBe(
		ToRightOf(_name).WithMarginDp(5),
		SameCenterVerticalAs(_name),
		ToHaveTextColor(Color.White)
	)

	.Expect(_follow)
	.ToBe(
		RightOfParent().WithMarginDp(4),
		BottomOfParent().WithMarginDp(12),
		ToHaveBackgroundAlpha(0f)
	)

	.Expect(_message)
	.ToBe(
		AboveOf(_follow).WithMarginDp(4),
		RightOfParent().WithMarginDp(4),
		ToHaveBackgroundAlpha(0f)
	)

	.Expect(_bottomLayout)
	.ToBe(
		AtItsOriginalPosition()
	)

	.Expect(_content)
	.ToBe(
		AtItsOriginalPosition(),
		Visible()
	)
	.ToAnimation()
	.SetDuration(1500)
	.Start();

Follow scroll

Use SetPercent to apply modify the current step of the animation

Exemple with a scrollview

_expectAnimMove = new ExpectAnim()
				.Expect(_avatar)
				.ToBe(
					TopOfParent().WithMarginDp(20),
					LeftOfParent().WithMarginDp(20),
					Scale(0.5f, 0.5f)
				)

				.Expect(_username)
				.ToBe(
					ToRightOf(_avatar).WithMarginDp(16),
					SameCenterVerticalAs(_avatar),

					Alpha(0.5f)
				)

				.Expect(_follow)
				.ToBe(
					RightOfParent().WithMarginDp(20),
					SameCenterVerticalAs(_avatar)
				)

				.Expect(_background)
				.ToBe(
					Height(_height).WithGravity(Java.Lang.Integer.ValueOf((int)GravityFlags.Left), Java.Lang.Integer.ValueOf((int)GravityFlags.Top))
				)
				.ToAnimation();

			_scrollView.ScrollChange += (sender, args) => {
				float percent = args.ScrollY * 1f / _scrollView.MaxScrollAmount;
				_expectAnimMove.SetPercent(percent);
			};

Apply directly

Use SetNow to apply directly the transformation

new ExpectAnim()
	.Expect(_view).ToBe(Invisible())
	.ToAnimation()
	.SetNow();

Reset

Use reset to return to the initial state of views

_expectAnimMove.Reset():

List of expectations

new ExpectAnim()
                .Expect(view)
                .ToBe(

                    //.WithMargin(marginPx)
                    //.WithMarginDp(margin)
                    //.WithMarginDimen(R.dimen.margin)

                    ToRightOf(view)
                    ToLeftOf(view)
                    BelowOf(view)
                    AboveOf(view)

                    AtItsOriginalPosition()


                    SameCenterAs(view, horizontal, vertical)
                    SameCenterHorizontalAs(view)
                    SameCenterVerticalAs(view)
                    CenterInParent(horizontal, vertical)
                    CenterVerticalInParent()
                    CenterHorizontalInParent()

                    CenterBetweenViews(view1, view2, horizontal, vertical)
                    CenterBetweenViewAndParent(otherView, horizontal, vertical, toBeOnRight, toBeOnBottom)

                    TopOfParent()
                    RightOfParent()
                    BottomOfParent()
                    LeftOfParent()

                    AlignBottom(otherView)
                    AlignTop(otherView)
                    AlignLeft(otherView)
                    AlignRight(otherView)

                    OutOfScreen(gravitiy)  //GravityFlags.Left / GravityFlags.Right / GravityFlags.Top / GravityFlags.Bottom

                	Alpha(alpha)
                    SameAlphaAs(otherView)
                    Visible()
                    Invisible()

                    //.KeepRatio()
                    //.WithGravity(horizontalGravity, verticalGravity)

                    AtItsOriginalScale()

                    Scale(scaleX, scaleY)
                    Height(height)
                    Width(width)
                    SameScaleAs(otherView)
                    SameWidthAs(otherView)
                    SameHeightAs(otherView)


                    ToHaveTextColor(textColor)
                    ToHaveBackgroundAlpha(alpha)

                    Rotated(rotation)
                    Vertical(bottomOfViewAtLeft)
                    AtItsOriginalRotation()
                )

Changelog

##1.0.2

Added flips rotations

FlippedHorizontally() FlippedVertically() FlippedHorizontallyAndVertically() WithCameraDistance(1000f)

##1.0.

Added rotations

Credits

Author (xamarin binding): Julien Mialon

Original author (android version): Florent Champigny

#Original license

Copyright 2017 florent37, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.