Image - long tap - xamarin

Question

Is there a way to detect a long tap on an image control in Xamarin Forms?
I'm using the carousel view to display images and would like to give the option to delete them by selecting with a long tap.

Answer 1

Based on your suggestions in the comments this is what I did:
(The purpose of the control is to be able to select an Image with a LongTap)
I defined my own Image control in the PCL:
IsSelected BindableProperty.
LongTap event.
public class MyImage:Image
{
private BindableProperty IsSelectedProperty = BindableProperty.Create("IsSelected", typeof(bool), typeof(MyImage), false);
public bool IsSelected {
get {
return (bool)GetValue(IsSelectedProperty);
}
set {
SetValue(IsSelectedProperty, value);
}
}
public event EventHandler LongClick;
public void OnLongClick()
{
IsSelected = !IsSelected;
if(IsSelected)
{
Opacity = 0.5;
}
else
{
Opacity = 1;
}
if (LongClick != null)
{
LongClick(this, EventArgs.Empty);
}
}
}
And this is my custom renderer: (Defined in the Android project)
[assembly: ExportRenderer(typeof(MyImage), typeof(MyImageRenderer))]
namespace PRISMCarouselView.Droid.Renderes
{
public class MyImageRenderer : ImageRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs<Image> e)
{
base.OnElementChanged(e);
if (Control != null)
{
ImageView androidSource = Control as ImageView;
MyImage myImage = e.NewElement as MyImage;
androidSource.LongClick += (object sender, LongClickEventArgs ee) =>
{
myImage.OnLongClick();
};
}
}
}
}
Edit 1:
Here's a slightly updated version, I use the BindingPropertyChangedDelegate to change the opacity of the image:
public class SelectableImage : Image
{
public SelectableImage()
{
}
private static BindableProperty IsSelectedProperty = BindableProperty.Create("IsSelected",
typeof(bool),
typeof(SelectableImage),
false, BindingMode.Default, null, (sender, o1, o2) => {
SelectableImage imageControl = sender as SelectableImage;
if(imageControl != null)
{
if(imageControl.IsSelected)
{
imageControl.Opacity = 0.5;
}else
{
imageControl.Opacity = 1;
}
}
});
public bool IsSelected {
get {
return (bool)GetValue(IsSelectedProperty);
}
set {
SetValue(IsSelectedProperty, value);
}
}
}
And the renderer:
[assembly: ExportRenderer(typeof(SelectableImage), typeof(SelectableImageRenderer))]
namespace Muserma.Apps.Droid.Renderer
{
public class SelectableImageRenderer : ImageRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs<Image> e)
{
base.OnElementChanged(e);
if (Control != null)
{
ImageView androidSource = Control as ImageView;
SelectableImage selectableImage = e.NewElement as SelectableImage;
androidSource.LongClick += (object sender, LongClickEventArgs ee) =>
{
selectableImage.IsSelected = !selectableImage.IsSelected;
};
}
}
}
}