public PlaylistDetailView()
{
TitleLabel = NSLabel.CreateWithFont(TitleFontName, TitleFontSize);
TitleLabel.Identifier = "TitleLabel";
TitleLabel.TextColor = NSColor.FromRgb(51, 51, 51);
DescriptionLabel = NSLabel.CreateWithFont(DescriptionFontName, DescriptionFontSize);
DescriptionLabel.Identifier = "DescriptionLabel";
DescriptionLabel.TextColor = NSColor.FromRgb(142, 142, 142);
SongsTable = new SongsListView();
outerStack = new NSStackView();
outerStack.TranslatesAutoresizingMaskIntoConstraints = false;
outerStack.Orientation = NSUserInterfaceLayoutOrientation.Vertical;
outerStack.Distribution = NSStackViewDistribution.Fill;
outerStack.Spacing = 10;
outerStack.EdgeInsets = new NSEdgeInsets(20, 0, 0, 0);
outerStack.AddArrangedSubview(TitleLabel);
outerStack.AddArrangedSubview(DescriptionLabel);
outerStack.AddArrangedSubview(SongsTable);
AddSubview(outerStack);
AddConstraint(MinimumHeight(SongsTable, 100));
AddConstraints(FillHorizontal(true, TitleLabel, DescriptionLabel));
AddConstraints(FillHorizontal(outerStack, false));
AddConstraints(FillVertical(outerStack, false));
}
public ChatPage()
{
InitializeComponent();
BindingContext = new ChatViewModel();
MessagingCenter.Subscribe <object, object>(this, "ScollList", (sender, args) =>
{
SongsListView.ScrollTo(args, ScrollToPosition.End, true);
});
}
private void SongsListViewJumpToActiveSong()
{
var activeSong = PlayerViewModel.ActiveSong;
if (activeSong == null)
{
return;
}
SongsListView.ScrollIntoView(activeSong, ScrollIntoViewAlignment.Leading);
}
private void SetupAnimations()
{
const float maxOffset = -16f;
var scrollViewer = SongsListView.FindDescendant <ScrollViewer>();
var scrollerPropSet = ElementCompositionPreview.GetScrollViewerManipulationPropertySet(scrollViewer);
var coverVisual = CoverGrid.GetVisual();
var coverPanelVisual = CoverPanel.GetVisual();
var titlePanelVisual = TitlePanel.GetVisual();
var contrastTitleTextVisual = ContrastTitleTextBlock.GetVisual();
var accentTitleTextVisual = AccentTitleTextBlock.GetVisual();
var subtitleTextVisual = SubtitleTextBlock.GetVisual();
var c = this.GetVisual().Compositor;
var coverPanelCoordinateY = c.CreateExpressionAnimation("Clamp(scroller.Translation.Y * factor, -16, 0)");
coverPanelCoordinateY.SetReferenceParameter("scroller", scrollerPropSet);
coverPanelCoordinateY.SetScalarParameter("factor", 0.2f);
coverPanelVisual.StartAnimation("Offset.Y", coverPanelCoordinateY);
var scaleAlgorithm = "Clamp(1 - layer.Offset.Y / maxOffset, 0.4, 1)";
var scaleAnim = c.CreateExpressionAnimation(scaleAlgorithm);
scaleAnim.SetReferenceParameter("layer", coverPanelVisual);
scaleAnim.SetScalarParameter("maxOffset", maxOffset);
coverVisual.StartAnimation("Scale.X", scaleAnim);
coverVisual.StartAnimation("Scale.Y", scaleAnim);
var titlePanelCoordinateXAnim = c.CreateExpressionAnimation("coverOriginWidth * (layer.Scale.X - 1.0)");
titlePanelCoordinateXAnim.SetReferenceParameter("layer", coverVisual);
titlePanelCoordinateXAnim.SetScalarParameter("coverOriginWidth", 76f);
titlePanelVisual.StartAnimation("Offset.X", titlePanelCoordinateXAnim);
var titlePanelCoordinateYAnim = c.CreateExpressionAnimation("layer.Offset.Y * 1.5");
titlePanelCoordinateYAnim.SetReferenceParameter("layer", coverPanelVisual);
titlePanelVisual.StartAnimation("Offset.Y", titlePanelCoordinateYAnim);
//var titleTextColorAnim = c.CreateExpressionAnimation("layer.Offset.Y < maxOffset / 2 ? whiteColor : accentColor");
//titleTextColorAnim.SetReferenceParameter("layer", coverPanelVisual);
//titleTextColorAnim.SetScalarParameter("maxOffset", maxOffset);
//titleTextColorAnim.SetColorParameter("whiteColor", Colors.White);
//titleTextColorAnim.SetColorParameter("accentColor", ((SolidColorBrush)TitleTextBlock.Foreground).Color);
var accentTitleOpacityAnim = c.CreateExpressionAnimation("1 - layer.Offset.Y / maxOffset");
accentTitleOpacityAnim.SetReferenceParameter("layer", coverPanelVisual);
accentTitleOpacityAnim.SetScalarParameter("maxOffset", maxOffset);
accentTitleTextVisual.StartAnimation("Opacity", accentTitleOpacityAnim);
var contrastTitleOpcityAnim = c.CreateExpressionAnimation("layer.Offset.Y / maxOffset");
contrastTitleOpcityAnim.SetReferenceParameter("layer", coverPanelVisual);
contrastTitleOpcityAnim.SetScalarParameter("maxOffset", maxOffset);
contrastTitleTextVisual.StartAnimation("Opacity", contrastTitleOpcityAnim);
var subtitleTextOpacityAnim = c.CreateExpressionAnimation("1 - layer.Offset.Y / maxOffset");
subtitleTextOpacityAnim.SetReferenceParameter("layer", coverPanelVisual);
subtitleTextOpacityAnim.SetScalarParameter("maxOffset", maxOffset);
subtitleTextVisual.StartAnimation("Opacity", subtitleTextOpacityAnim);
}
