// Update is called once per frame
private void Update()
{
if (this.state == CarouselState.Stopped)
{
return;
}
else if (this.state == CarouselState.Next)
{
this.currentTransitionTime -= Time.deltaTime;
if (this.currentTransitionTime < 0)
{
this.currentTransitionTime = 0;
this.state = CarouselState.Stopped;
this.nextButton.interactable = true;
this.prevButton.interactable = true;
}
this.UpdateItemPos(1 - (this.currentTransitionTime / this.transitionTime), CarouselState.Next);
}
else if (this.state == CarouselState.Previous)
{
this.currentTransitionTime -= Time.deltaTime;
if (this.currentTransitionTime < 0)
{
this.currentTransitionTime = 0;
this.state = CarouselState.Stopped;
this.nextButton.interactable = true;
this.prevButton.interactable = true;
}
this.UpdateItemPos(1 - (this.currentTransitionTime / this.transitionTime), CarouselState.Previous);
}
}
//Method called externally to rotate to the next carousel element
public void Next()
{
this.currentIndex++;
if (this.currentIndex >= this.carouselItems.Count)
{
this.currentIndex = 0;
}
this.currentTransitionTime = this.transitionTime;
this.nextButton.interactable = false;
this.prevButton.interactable = false;
this.state = CarouselState.Next;
}
//Method called externally to rotate to the previous carousel element
public void Previous()
{
this.currentIndex--;
if (this.currentIndex < 0)
{
this.currentIndex = this.carouselItems.Count - 1;
}
this.currentTransitionTime = this.transitionTime;
this.nextButton.interactable = false;
this.prevButton.interactable = false;
this.state = CarouselState.Previous;
}
//Method called from Update to shift the positions of all carousel items
private void UpdateItemPos(float interpPercent_, CarouselState direction_)
{
//Looping through each element in the carousel
for (int i = 0; i < this.carouselItems.Count; i++)
{
//Finding the position that this item is moving toward based on our currently selected index
int currIndex = i + this.currentIndex;
if (currIndex >= this.carouselItems.Count)
{
currIndex -= this.carouselItems.Count;
}
//Finding the position that this item is moving away from based on our direction
int prevIndex = currIndex;
if (direction_ == CarouselState.Next)
{
prevIndex--;
if (prevIndex < 0)
{
prevIndex = this.carouselItems.Count - 1;
}
}
else if (direction_ == CarouselState.Previous)
{
prevIndex++;
if (prevIndex >= this.carouselItems.Count)
{
prevIndex = 0;
}
}
//Finding the new position based on the interp percent between the two positions
Vector3 currPos = this.itemPositions[currIndex];
Vector3 prevPos = this.itemPositions[prevIndex];
Vector3 newPos = prevPos + ((currPos - prevPos) * interpPercent_);
this.carouselItems[i].localPosition = newPos;
//Finding the scale based on the depth of the item
float scalePercent = 1 - (newPos.z / this.depth);
scalePercent = this.depthScale.Evaluate(scalePercent);
this.carouselItems[i].localScale = new Vector3(1, 1, 1) * scalePercent;
}
}
void CreateCarousel()
{
ScrollView scrollView = new ScrollView();
StackLayout stkWrapper = new StackLayout();
StackLayout editStatusBar = new StackLayout()
{
Orientation = StackOrientation.Horizontal
};
Image imgEdit = new Image()
{
HorizontalOptions = LayoutOptions.EndAndExpand,
Source = "tick.ico",
HeightRequest = WidthRequest = 50
};
editStatusBar.Children.Add(imgEdit);
StackLayout actionStatusBar = new StackLayout();
TapGestureRecognizer recognizer = new TapGestureRecognizer()
{
NumberOfTapsRequired = 1
};
recognizer.Tapped += (sender, e) =>
{
if (CurrentState.Equals(CarouselState.Edit))
{
CurrentState = CarouselState.View;
}
else
{
CurrentState = CarouselState.Edit;
}
CreateCarousel();
};
imgEdit.GestureRecognizers.Add(recognizer);
editStatusBar.Children.Add(imgEdit);
stkWrapper.Children.Add(editStatusBar);
Grid grdMain = new Grid()
{
// Margin = 20,RowSpacing=5
// HeightRequest=100
};
int index = 0;
for (int i = 0; i < Source.Count; i++)
{
int originalivalue = i;
ItemPerRow = ItemPerRow >= Source.Count ? Source.Count : ItemPerRow;
for (int j = 0; j < ItemPerRow; j++)
{
if (Source.Count > index)
{
grdMain.RowDefinitions.Add(new RowDefinition()
{
Height = 50
// Height=new GridLength(1,GridUnitType.Auto)
});
RelativeLayout rtlThumbnailContent = new RelativeLayout()
{
Margin = 0,
VerticalOptions = HorizontalOptions = LayoutOptions.FillAndExpand
};
Image ThumbNail = new Image()
{
Source = Source[i].FilePath,
Aspect = Aspect.AspectFit,
ClassId = Source[i].Id
};
rtlThumbnailContent.Children.Add(ThumbNail, Constraint.RelativeToParent((parent) =>
{
return(parent.X * 0);
}), Constraint.RelativeToParent((parent) =>
{
return(parent.Y * 0);
}), Constraint.RelativeToParent((parent) =>
{
return(parent.Width);
}), Constraint.RelativeToParent((parent) =>
{
return(parent.Height);
}));
CustomImage imgSelect = new CustomImage()
{
ID = System.IO.Path.GetFileName(Source[i].FilePath),
IsVisible = CurrentState.Equals(CarouselState.Edit)
//WidthRequest= HeightRequest=10
};
rtlThumbnailContent.Children.Add(imgSelect, Constraint.RelativeToView(ThumbNail, (parent, view) =>
{
return(view.Width * .8);
}), Constraint.RelativeToView(ThumbNail, (parent, view) =>
{
return(view.Height * .0);
})
// , Constraint.RelativeToView(ThumbNail, (parent, view) =>
//{
// return view.Height * .4;
//}), Constraint.RelativeToView(ThumbNail, (parent, view) =>
//{
// return view.Height * .4;
//})
);
var sdf = new StackLayout();
sdf.Children.Add(rtlThumbnailContent);
TapGestureRecognizer imgtap = new TapGestureRecognizer();
imgtap.Tapped += Imgtap_Tapped;
imgSelect.GestureRecognizers.Add(imgtap);
TapGestureRecognizer imgThumbNailtap = new TapGestureRecognizer()
{
NumberOfTapsRequired = 1
};
imgThumbNailtap.Tapped += async(sender, e) => {
if (CurrentState.Equals(CarouselState.View))
{
Image img = sender as Image;
CarouselModal modal = Source.FirstOrDefault(ec => ec.Id == img.ClassId);
await Navigation.PushModalAsync(new MediaPlayerPage(modal));
}
else
{
Imgtap_Tapped(imgSelect, e);
}
};
ThumbNail.GestureRecognizers.Add(imgThumbNailtap);
i++;
grdMain.Children.Add(rtlThumbnailContent, j, originalivalue);
}
}
}
StackLayout stkStatusbar = new StackLayout()
{
BackgroundColor = Color.Gray
};
lblStatus.Text = $"{SelectedItems?.Count} item(s) selected.";
stkStatusbar.Children.Add(lblStatus);
stkWrapper.Children.Add(grdMain);
stkWrapper.Children.Add(stkStatusbar);
scrollView.Content = stkWrapper;
this.Content = scrollView;
}
