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using System;
using System.Collections.Generic;
namespace Xamarin.Forms
{
public class DataTemplate : ElementTemplate
{
public DataTemplate()
{
}
public DataTemplate(Type type) : base(type)
{
}
public DataTemplate(Func<object> loadTemplate) : base(loadTemplate)
{
}
public IDictionary<BindableProperty, BindingBase> Bindings { get; } = new Dictionary<BindableProperty, BindingBase>();
public IDictionary<BindableProperty, object> Values { get; } = new Dictionary<BindableProperty, object>();
public void SetBinding(BindableProperty property, BindingBase binding)
{
if (property == null)
throw new ArgumentNullException("property");
if (binding == null)
throw new ArgumentNullException("binding");
Values.Remove(property);
Bindings[property] = binding;
}
public void SetValue(BindableProperty property, object value)
{
if (property == null)
throw new ArgumentNullException("property");
Bindings.Remove(property);
Values[property] = value;
}
internal override void SetupContent(object item)
{
ApplyBindings(item);
ApplyValues(item);
}
void ApplyBindings(object item)
{
if (Bindings == null)
return;
var bindable = item as BindableObject;
if (bindable == null)
return;
foreach (KeyValuePair<BindableProperty, BindingBase> kvp in Bindings)
{
if (Values.ContainsKey(kvp.Key))
throw new InvalidOperationException("Binding and Value found for " + kvp.Key.PropertyName);
bindable.SetBinding(kvp.Key, kvp.Value.Clone());
}
}
void ApplyValues(object item)
{
if (Values == null)
return;
var bindable = item as BindableObject;
if (bindable == null)
return;
foreach (KeyValuePair<BindableProperty, object> kvp in Values)
bindable.SetValue(kvp.Key, kvp.Value);
}
}
}
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