| private FlowPerformTap ( object item ) : void | ||
| item | object | |
| return | void | |
async Task ExecuteTapGestureRecognizer(View view)
{
var flowCell = view as IFlowViewCell;
if (flowCell != null)
{
flowCell.OnTapped();
}
FlowListView flowListView = null;
_flowListViewRef.TryGetTarget(out flowListView);
if (flowListView != null)
{
int tapBackgroundEffectDelay = flowListView.FlowTappedBackgroundDelay;
try
{
if (tapBackgroundEffectDelay != 0)
{
view.BackgroundColor = flowListView.FlowTappedBackgroundColor;
}
flowListView.FlowPerformTap(view, view.BindingContext);
}
finally
{
if (tapBackgroundEffectDelay != 0)
{
await Task.Delay(tapBackgroundEffectDelay);
view.BackgroundColor = flowListView.FlowRowBackgroundColor;
}
}
}
}
/// <summary>
/// Override this method to execute an action when the BindingContext changes.
/// </summary>
/// <remarks></remarks>
protected override void OnBindingContextChanged()
{
rootLayout.BindingContext = BindingContext;
base.OnBindingContextChanged();
var container = BindingContext as IList;
if (container == null)
{
return;
}
// Getting view types from templates
var containerCount = container.Count;
IList <Type> columnTypes = GetViewTypesFromTemplates(container);
bool layoutChanged = RowLayoutChanged(containerCount, columnTypes);
if (!layoutChanged) // REUSE VIEWS
{
for (int i = 0; i < containerCount; i++)
{
SetBindingContextForView(rootLayout.Children[i], container[i]);
}
}
else // RECREATE COLUMNS
{
if (rootLayout.Children.Count > 0)
{
rootLayout.Children.Clear();
}
for (int i = 0; i < containerCount; i++)
{
var view = (View)Activator.CreateInstance(columnTypes[i]);
view.BindingContext = container[i];
view.GestureRecognizers.Add(new TapGestureRecognizer()
{
Command = new Command(async(obj) => {
var flowCell = view as IFlowViewCell;
if (flowCell != null)
{
flowCell.OnTapped();
}
FlowListView flowListView = null;
flowListViewRef.TryGetTarget(out flowListView);
if (flowListView != null)
{
int tapBackgroundEffectDelay = flowListView.FlowTappedBackgroundDelay;
try
{
if (tapBackgroundEffectDelay != 0)
{
view.BackgroundColor = flowListView.FlowTappedBackgroundColor;
}
flowListView.FlowPerformTap(view.BindingContext);
}
finally
{
if (tapBackgroundEffectDelay != 0)
{
await Task.Delay(tapBackgroundEffectDelay);
view.BackgroundColor = Color.Transparent;
}
}
}
})
});
SetBindingContextForView(view, container[i]);
AddViewToLayout(view, containerCount, i);
}
}
}
