//Enables MouseInput and Scroll-Ability by Touch
private void InkCanvas_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
Point p = new Point()
{
X = e.Position.X,
Y = e.Position.Y,
};
if (GeometryHelper.PointIsInPolygon(P1, P2, P3, p) == true && e.IsInertial == false && ViewModel.GeodreieckVisibility == Visibility.Visible)
{
Geodreieck_ManipulationDelta(sender, e);
}
else
{
double x = e.Delta.Translation.X;
double y = e.Delta.Translation.Y;
ScaleFactor = ScrollViewer_InkCanvas.ZoomFactor;
ScaleFactor *= e.Delta.Scale;
if (Math.Abs(x) > Math.Abs(y))
{
ScrollViewer_InkCanvas.ChangeView(ScrollViewer_InkCanvas.HorizontalOffset - x, null, ScaleFactor);
}
else
{
ScrollViewer_InkCanvas.ChangeView(null, ScrollViewer_InkCanvas.VerticalOffset - y, ScaleFactor);
}
ScaleFactor = ScrollViewer_InkCanvas.ZoomFactor;
}
}
//AppLifeCycle and DataEvents
private async void MainPage_Loaded(object sender, RoutedEventArgs e)
{
await ViewModel.AutoLoadAsync();
ScrollViewer_InkCanvas.ChangeView(null, null, 0.5f, true);
FirstStartDialog firstStartDialog = new FirstStartDialog(ViewModel);
if (ViewModel.FirstStartOnBuild == true)
{
await firstStartDialog.ShowAsync();
}
}