private void User_ContextRequested(UIElement sender, ContextRequestedEventArgs args)
{
var flyout = new MenuFlyout();
var element = sender as FrameworkElement;
var messageSender = ScrollingHost.ItemFromContainer(element) as MessageSender;
flyout.Items.Add(new MenuFlyoutItem {
Text = Strings.Resources.Unblock, Command = ViewModel.UnblockCommand, CommandParameter = messageSender
});
if (args.TryGetPosition(sender, out Point point))
{
if (point.X < 0 || point.Y < 0)
{
point = new Point(Math.Max(point.X, 0), Math.Max(point.Y, 0));
}
flyout.ShowAt(sender, point);
}
}
private void SetScrollMode(bool enable)
{
if (enable)
{
ScrollingHost.VerticalScrollMode = ScrollMode.Auto;
ScrollingHost.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
ScrollingHost.ChangeView(null, ScrollingHost.ScrollableHeight - 48, null, false);
ScrollingInfo.Visibility = Visibility.Visible;
InfoPanel.Visibility = Visibility.Collapsed;
}
else
{
ScrollingHost.ChangeView(null, ScrollingHost.ScrollableHeight, null, true);
ScrollingHost.VerticalScrollMode = ScrollMode.Disabled;
ScrollingHost.VerticalScrollBarVisibility = ScrollBarVisibility.Hidden;
ScrollingInfo.Visibility = Visibility.Collapsed;
InfoPanel.Visibility = Visibility.Visible;
}
}
private async void PanelDoubleTapped(object sender, DoubleTappedRoutedEventArgs e)
{
var position = e.GetPosition(Panel);
if (ScrollingHost.ZoomFactor != 1)
{
//ScrollingHost.ZoomToFactor(1);
ScrollingHost.ChangeView(null, null, 1, true);
}
else if (ScrollingHost.ZoomFactor == 1)
{
//ScrollingHost.ZoomToFactor(4);
var dispatcher = Window.Current.CoreWindow.Dispatcher;
await dispatcher.RunAsync(CoreDispatcherPriority.High, () =>
{
ScrollingHost.ChangeView(position.X, position.Y, 4, true);
//ScrollingHost.ScrollToHorizontalOffset(position.X);
//ScrollingHost.ScrollToVerticalOffset(position.Y);
});
}
}
private void TagsTextBox_SizeChanged(object sender, SizeChangedEventArgs e)
{
ScrollingHost.ChangeView(null, ScrollingHost.ScrollableHeight, null);
}
private void ChangeView(int index, bool disableAnimation)
{
ScrollingHost.ChangeView(ActualWidth * index, null, null, disableAnimation);
}
private void LayoutRoot_HorizontalSnapPointsChanged(object sender, object e)
{
ScrollingHost.HorizontalSnapPointsType = SnapPointsType.None;
ScrollingHost.ChangeView(LayoutRoot.SnapPointWidth, null, null, true);
ScrollingHost.HorizontalSnapPointsType = SnapPointsType.MandatorySingle;
}
public void Reset()
{
ScrollingHost.ChangeView(0, 0, 1, true);
}
private async void Hyperlink_Click(TLTextUrl urlText)
{
if (urlText.WebPageId == _webpageId)
{
var fragmentStart = urlText.Url.IndexOf('#');
if (fragmentStart > 0)
{
var name = urlText.Url.Substring(fragmentStart + 1);
if (_anchors.TryGetValue(name, out Border anchor))
{
ScrollingHost.ScrollIntoView(anchor);
//anchor.StartBringIntoView();
return;
if (_scrollingHost == null)
{
_scrollingHost = ScrollingHost.Descendants <ScrollViewer>().FirstOrDefault() as ScrollViewer;
}
if (_scrollingHost != null)
{
var transform = anchor.TransformToVisual(ScrollingHost.ItemsPanelRoot);
var position = transform.TransformPoint(new Point());
_scrollingHost.ChangeView(null, Math.Max(0, position.Y - 8), null, false);
}
}
}
}
else if (urlText.WebPageId != 0)
{
var protoService = (MTProtoService)MTProtoService.Current;
protoService.SendInformativeMessageInternal <TLWebPageBase>("messages.getWebPage", new TLMessagesGetWebPage {
Url = urlText.Url, Hash = 0
},
result =>
{
Execute.BeginOnUIThread(() =>
{
ViewModel.NavigationService.Navigate(typeof(InstantPage), result);
});
},
fault =>
{
Debugger.Break();
});
}
else
{
var url = urlText.Url;
if (url.StartsWith("http") == false)
{
url = "http://" + url;
}
if (Uri.TryCreate(url, UriKind.Absolute, out Uri uri))
{
if (MessageHelper.IsTelegramUrl(uri))
{
MessageHelper.HandleTelegramUrl(urlText.Url);
}
else
{
await Launcher.LaunchUriAsync(uri);
}
}
}
}
private void OnLoaded(object sender, RoutedEventArgs e)
{
return;
var scrollViewer = ScrollingHost.GetScrollViewer();
if (scrollViewer == null)
{
return;
}
var properties = ElementCompositionPreview.GetScrollViewerManipulationPropertySet(scrollViewer);
var header = ElementCompositionPreview.GetElementVisual(HeaderPanel);
var info = ElementCompositionPreview.GetElementVisual(ScrollingInfo);
var photo = ElementCompositionPreview.GetElementVisual(Photo);
var title = ElementCompositionPreview.GetElementVisual(LabelTitle);
var subtitle = ElementCompositionPreview.GetElementVisual(Subtitle);
var action = ElementCompositionPreview.GetElementVisual(SendMessage);
if (ApiInformation.IsMethodPresent("Windows.UI.Composition.Compositor", "CreateLinearGradientBrush"))
{
var overlay = photo.Compositor.CreateSpriteVisual();
var gradient = overlay.Compositor.CreateLinearGradientBrush();
gradient.ColorStops.Add(overlay.Compositor.CreateColorGradientStop(0, ((SolidColorBrush)App.Current.Resources["PageHeaderBackgroundBrush"]).Color));
gradient.ColorStops.Add(overlay.Compositor.CreateColorGradientStop(1, ((SolidColorBrush)App.Current.Resources["PageSubHeaderBackgroundBrush"]).Color));
gradient.StartPoint = new Vector2();
gradient.EndPoint = new Vector2(0, 1);
overlay.Brush = gradient;
overlay.Size = new Vector2((float)HeaderOverlay.ActualWidth, (float)HeaderOverlay.ActualHeight);
HeaderOverlay.SizeChanged += (s, args) =>
{
overlay.Size = args.NewSize.ToVector2();
};
ElementCompositionPreview.SetElementChildVisual(HeaderOverlay, overlay);
var animOverlay = header.Compositor.CreateExpressionAnimation("Min(76, -Min(scrollViewer.Translation.Y, 0)) / 38");
animOverlay.SetReferenceParameter("scrollViewer", properties);
overlay.StartAnimation("Scale.Y", animOverlay);
}
var animClip = header.Compositor.CreateExpressionAnimation("Min(76, -Min(scrollViewer.Translation.Y, 0))");
animClip.SetReferenceParameter("scrollViewer", properties);
header.Clip = header.Compositor.CreateInsetClip(0, -32, -12, 0);
header.Clip.StartAnimation("BottomInset", animClip);
var animPhotoOffsetY = header.Compositor.CreateExpressionAnimation("-(Min(76, -Min(scrollViewer.Translation.Y, 0)) / 76 * 41)");
animPhotoOffsetY.SetReferenceParameter("scrollViewer", properties);
var animPhotoOffsetX = header.Compositor.CreateExpressionAnimation("Min(76, -Min(scrollViewer.Translation.Y, 0)) / 76 * 28");
animPhotoOffsetX.SetReferenceParameter("scrollViewer", properties);
var animPhotoScale = header.Compositor.CreateExpressionAnimation("1 -(Min(76, -Min(scrollViewer.Translation.Y, 0)) / 76 * (34 / 64))");
animPhotoScale.SetReferenceParameter("scrollViewer", properties);
photo.StartAnimation("Offset.Y", animPhotoOffsetY);
photo.StartAnimation("Offset.X", animPhotoOffsetX);
photo.StartAnimation("Scale.X", animPhotoScale);
photo.StartAnimation("Scale.Y", animPhotoScale);
var animTitleY = header.Compositor.CreateExpressionAnimation("-(Min(76, -Min(scrollViewer.Translation.Y, 0)) / 76 * 58)");
animTitleY.SetReferenceParameter("scrollViewer", properties);
var animTitleX = header.Compositor.CreateExpressionAnimation("-(Min(76, -Min(scrollViewer.Translation.Y, 0)) / 76 * 6)");
animTitleX.SetReferenceParameter("scrollViewer", properties);
title.StartAnimation("Offset.Y", animTitleY);
title.StartAnimation("Offset.X", animTitleX);
subtitle.StartAnimation("Offset.Y", animTitleY);
subtitle.StartAnimation("Offset.X", animTitleX);
var animInfoY = header.Compositor.CreateExpressionAnimation("-(Min(76, -Min(scrollViewer.Translation.Y, 0)) / 76 * 40)");
animInfoY.SetReferenceParameter("scrollViewer", properties);
var animOpacity = header.Compositor.CreateExpressionAnimation("1 -(Min(76, -Min(scrollViewer.Translation.Y, 0)) / 76)");
animOpacity.SetReferenceParameter("scrollViewer", properties);
info.StartAnimation("Offset.Y", animInfoY);
info.StartAnimation("Opacity", animOpacity);
action.CenterPoint = new Vector3(18);
action.StartAnimation("Opacity", animOpacity);
action.StartAnimation("Scale.X", animOpacity);
action.StartAnimation("Scale.Y", animOpacity);
}
public ScrollViewer GetScrollViewer()
{
return(ScrollingHost.GetScrollViewer());
}
