I have a user control which moves with my finger movement.The user control has its own manipulation delta set. My problem is , when My finger is on the user control and I am trying to move it up , I am having lag because it is not moving up with my finger. The user control appears when I long tap on my screen , the location of the user control is whereever my finger is pressed . It moves with my finger whereever I move my finger , but once my finger goes on the user control I am not having smooth movements .
Any help would be appreciated. The XAML is
<Page x:Name="page1"
x:Class="controlMagnifier.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:controlMagnifier"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid x:Name="ParentGrid" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" PointerReleased="ParentGrid_OnPointerReleased" >
<Canvas x:Name="InkPresenter" Height="auto" Width="auto">
<Image Stretch="None" x:Name="image2" >
<Image.Source >
<BitmapImage UriSource="/Assets/wallpaper.jpg" />
</Image.Source>
</Image>
</Canvas>
<local:MagnifierUsercontrol x:Name="MagnifyTip" Visibility="Collapsed" ManipulationDelta="MagnifyTip_ManipulationDelta" ManipulationMode="All" >
<local:MagnifierUsercontrol.RenderTransform>
<CompositeTransform/>
</local:MagnifierUsercontrol.RenderTransform>
</local:MagnifierUsercontrol>
</Grid>
</Page>
The CS Code Is
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Shapes;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using System.Diagnostics;
using Windows.UI.Popups;
using Windows.UI.Input;
using Windows.Storage;
using Windows.UI.Xaml.Media.Imaging;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
namespace controlMagnifier
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
public const int XAxis = 105;
public const int YAxis = 270;
public Thickness margin;
public WriteableBitmap CurrentBitmapObj, CurrentCroppedImage = null;
public MainPage()
{
this.InitializeComponent();
ParentGrid.Holding += Grid_Holding;
image2.PointerMoved += InkCanvas_PointerMoved;
image2.PointerReleased += ParentGrid_OnPointerReleased;
image2.CacheMode=new BitmapCache();
StoreCrrentImage();
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Grid_Holding(object sender, HoldingRoutedEventArgs e)
{
//Point p;
try
{
Point p = e.GetPosition(ParentGrid);
double height = MagnifyTip.Height;
double width = MagnifyTip.Width;
margin = MagnifyTip.Margin;
margin.Left = p.X - XAxis;
margin.Right = p.Y - YAxis;
MagnifyTip.Margin = margin;
// MagnifyTip.Margin = new Thickness(p.X - XAxis, p.Y - YAxis, 0, 0);
MagnifyTip.Visibility = Visibility.Visible;
}
catch (Exception)
{
throw;
}
}
private void InkCanvas_PointerMoved(object sender, PointerRoutedEventArgs e)
{
try
{
PointerPoint pt = e.GetCurrentPoint(image2);
Point currentContactPt = pt.Position;
double xValue = currentContactPt.X;
double yValue = currentContactPt.Y;
// MagnifyTip.
double height = MagnifyTip.Height;
double width = MagnifyTip.Width;
MagnifyTip.image1.ImageSource = CropBitmap(currentContactPt);
MagnifyTip.Margin = new Thickness(xValue - XAxis, yValue - YAxis, 0, 0);
}
catch (Exception)
{
throw;
}
finally
{e.Handled = true;}
}
private async void StoreCrrentImage()
{
try
{
StorageFile storageFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Assets/wallpaper.jpg", UriKind.RelativeOrAbsolute));
using (
Windows.Storage.Streams.IRandomAccessStream fileStream =
await storageFile.OpenAsync(FileAccessMode.Read))
{
BitmapImage bitmapImage = new BitmapImage();
await bitmapImage.SetSourceAsync(fileStream);
WriteableBitmap writeableBitmap =
new WriteableBitmap(bitmapImage.PixelWidth, bitmapImage.PixelHeight);
fileStream.Seek(0);
await writeableBitmap.SetSourceAsync(fileStream);
CurrentBitmapObj = writeableBitmap;
writeableBitmap.Invalidate();
}
}
catch (Exception )
{
throw;
}
finally
{}
}
/// <summary>
/// This method crops the image by accepting x and y as Arguments
/// </summary>
/// <param name="point"></param>
/// <returns>Cropped Image</returns>
private WriteableBitmap CropBitmap(Point point)
{
try
{
CurrentCroppedImage = CurrentBitmapObj.Crop(Convert.ToInt32(point.X), Convert.ToInt32(point.Y), 100, 100);
// var resized = CurrentCroppedImage.Resize(200, 300, WriteableBitmapExtensions.Interpolation.Bilinear);
}
catch (Exception)
{
throw;
}
return CurrentCroppedImage;
}
private void MagnifyTip_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
Point p;
p.X = e.Delta.Translation.X;
p.Y = e.Delta.Translation.Y;
var Dragme = (CompositeTransform)MagnifyTip.RenderTransform;
Dragme.TranslateX += p.X;
Dragme.TranslateY += p.Y;
// MagnifyTip.controlCanvas.SetValue(Canvas.SetLeft, p.X);
}
private void ParentGrid_OnPointerReleased(object sender, PointerRoutedEventArgs e)
{
MagnifyTip.Visibility = Visibility.Collapsed;
// throw new NotImplementedException();
}
}
}
The user control looks like 
