// TODO: Resolve async void
private async void OnCanvasTap(TwinTechs.Gestures.BaseGestureRecognizer recognizer, TwinTechs.Gestures.GestureRecognizerState state)
{
var tapRecognizer = recognizer as TwinTechs.Gestures.TapGestureRecognizer;
var view = recognizer.View;
var positionInView = recognizer.LocationInView (view);
var positionInParentView = recognizer.LocationInView (view.ParentView);
var shapeViewModel = await ViewModel.GenerateRandomShapeAsync ();
var shapeView = new ShapeView () {
BindingContext = shapeViewModel
};
shapeView.SetBinding (ShapeView.ColorProperty, "Color");
shapeView.SetBinding (ShapeView.ImageUrlProperty, "ImageUrl");
shapeView.SetBinding (ShapeView.ShapeProperty, "Shape");
shapeView.SetBinding (ShapeView.TitleProperty, "Title");
shapeView.SetBinding (ShapeView.OnDoubleTapProperty, "RefreshShape");
AbsoluteLayout.SetLayoutFlags (shapeView,
AbsoluteLayoutFlags.None);
AbsoluteLayout.SetLayoutBounds (shapeView,
new Rectangle (x: positionInView.X, y: positionInView.Y, height: 200f, width: 50f));
Canvas.Children.Add (shapeView);
// ViewModel.PlaceShape(new PointF(sender.X);
}
private void OnScrolled( Object sender, TwinTechs.Controls.ControlScrollEventArgs e)
{
if (e.Delta > 0) {
if (mActiveButtonIndex + 1 != mCategoryIndexList.Count) {
int productCellIndex = mCategoryIndexList [mActiveButtonIndex + 1];
if (e.CurrentRow * 2 >= productCellIndex) {
mActiveButtonIndex += 1;
ChangeSelectedButton ();
}
}
} else
{
if (mActiveButtonIndex != -0) {
int productCellIndex = mCategoryIndexList [mActiveButtonIndex ];
if (e.CurrentRow * 2 <= productCellIndex) {
mActiveButtonIndex -= 1;
ChangeSelectedButton ();
}
}
}
}
/*private async Task WaitUntilCorrespondingSubCategoryLoaded(int productCellIndex)
{
mParent.mActivityIndicator.IsRunning = true;
ProductScrollView.IsVisible = false;
while (ProductGrid.Children.Count-2 < productCellIndex) {
await Task.Delay (100);
}
mParent.mActivityIndicator.IsRunning = false;
ProductScrollView.IsVisible = true;
}*/
/*
private void PopulateTopSelling()
{
}
*/
private void OnScrolled( Object sender, TwinTechs.Controls.ControlScrollEventArgs e)
{
if (e.Delta > 0) {
if (mActiveButtonIndex + 1 != mCategoryIndexList.Count) {
int productCellIndex = mCategoryIndexList [mActiveButtonIndex + 1];
if (e.CurrentRow * 2 >= productCellIndex) {
mActiveButtonIndex += 1;
ChangeSelectedButton ();
}
}
} else
{
if (mActiveButtonIndex != -0) {
int productCellIndex = mCategoryIndexList [mActiveButtonIndex ];
if (e.CurrentRow * 2 <= productCellIndex) {
mActiveButtonIndex -= 1;
ChangeSelectedButton ();
}
}
}
/*if (DecideIfIsUpOrDown (sender as ScrollView) == "Down") {
if (mActiveButtonIndex + 1 != mCategoryIndexList.Count) {
int productCellIndex = mCategoryIndexList [mActiveButtonIndex + 1];
try {
double top = ProductGrid.Children.ElementAt (productCellIndex).Bounds.Top;
if (ProductScrollView.ScrollY > top) {
mActiveButtonIndex += 1;
ChangeSelectedButton();
}
} catch {
System.Diagnostics.Debug.WriteLine ("Something is wrong with Product Number in Grid");
}
}
if ( ProductScrollView.ScrollY >= ProductGrid.Children.ElementAt (mLastLoadedIndex).Bounds.Bottom-50 ) {
int endIndex = (int)Math.Ceiling (ProductScrollView.ScrollY / (int)Math.Floor(ProductGrid.Children.ElementAt(0).Height-MyDevice.ViewPadding/2)) * 2 - 1;
if (endIndex >= ProductGrid.Children.Count) {
endIndex = ProductGrid.Children.Count - 1;
}
mLastLoadedIndex = endIndex;
}
}else {
if (mActiveButtonIndex != 0) {
int productCellIndex = mCategoryIndexList [mActiveButtonIndex];
try{
double top = ProductGrid.Children.ElementAt (productCellIndex).Bounds.Top;
if (ProductScrollView.ScrollY < top) {
mActiveButtonIndex -= 1;
ChangeSelectedButton();
}
}
catch{
System.Diagnostics.Debug.WriteLine ("Something is wrong with Product Number in Grid");
}
}
if (mLastLoadedIndex >= ProductGrid.Children.Count)
mLastLoadedIndex = ProductGrid.Children.Count - 1;
if (ProductScrollView.ScrollY <= ProductGrid.Children.ElementAt (mLastLoadedIndex).Bounds.Top) {
int endIndex = (int)Math.Floor (ProductScrollView.ScrollY / (int)Math.Floor(ProductGrid.Children.ElementAt(0).Height-MyDevice.ViewPadding/2)) * 2 - 1;
if (endIndex < 0) {
endIndex = 0;
}
else if( endIndex >= ProductGrid.Children.Count )
endIndex = ProductGrid.Children.Count - 1;
mLastLoadedIndex = endIndex;
}
}*/
}
void OnItemSelected(object sender, TwinTechs.GridEventArgs<object> e)
{
var item = e.Value as MediaItem;
DisplayAlert ("you selected an item", item.Name, "Ok");
}
void MediaItemsListView_OnScroll (object sender, TwinTechs.Controls.ControlScrollEventArgs e)
{
_scrollPosition = e.CurrentY;
}
