void addMessage(Message msg)
{
var date = msg.SubmittedDate.Date;
GroupedMessage targetMessageGroup = null;
targetMessageGroup = GroupedMessages.Where(x => x.DateTime == date).FirstOrDefault();
if (targetMessageGroup == null)
{
targetMessageGroup = new GroupedMessage()
{
DateTime = date
};
if (GroupedMessages.Count == 0)
{
GroupedMessages.Add(targetMessageGroup);
}
else
{
for (int i = GroupedMessages.Count - 1; i >= 0; i--)
{
if (date > GroupedMessages[i].DateTime)
{
GroupedMessages.Insert(i + 1, targetMessageGroup);
break;
}
if (i == 0)//Last
{
GroupedMessages.Insert(i, targetMessageGroup);
}
}
}
}
targetMessageGroup.Add(msg);
targetMessageGroup = new GroupedMessage(targetMessageGroup.OrderBy(x => x.SubmittedDate).ToList());
}
async Task <List <Message> > RefreshData()
{
await Task.Delay(1500);
//Each time get n old messages..
List <Message> oldMessages = new List <Message>();
if (refreshCount < 3)
{
for (int i = 0; i < LOAD_MESSAGE_COUNT; i++)
{
oldMessages.Add(GenRandomMessage());
}
var oldestDateTime = GroupedMessages.Where(x => x.DateTime == GroupedMessages.Min(y => y.DateTime)).First().Min(x => x.SubmittedDate);
var index = 1;
foreach (var msg in oldMessages)
{
msg.SubmittedDate = oldestDateTime.AddDays(index * -1).AddHours(index * -1);
index++;
}
oldMessages = new List <Message>(oldMessages.OrderByDescending(x => x.SubmittedDate.ToBinary()));
}
refreshCount++;
return(oldMessages);
}
void FormGroupMessages(IList <Message> messages)
{
foreach (var msg in messages)
{
addMessage(msg);
}
GroupedMessages = new ObservableCollection <GroupedMessage>(GroupedMessages.OrderBy(x => x.DateTime).ToList());
}
void OnMessageDisappearing(Message message)
{
var idx = GroupedMessages.SelectMany(x => x).ToList().IndexOf(message);
if (idx <= GroupedMessages.SelectMany(x => x).ToList().Count - 6)
{
Device.BeginInvokeOnMainThread(() =>
{
ShowScrollTap = true;
LastMessageVisible = false;
});
}
}
void OnMessageAppearing(Message msg)
{
//TODO this is slow omg~
var idx = GroupedMessages.SelectMany(x => x).ToList().IndexOf(msg);
if (idx >= GroupedMessages.SelectMany(x => x).ToList().Count - 6)
{
Device.BeginInvokeOnMainThread(() =>
{
ShowScrollTap = false;
LastMessageVisible = true;
PendingMessageCount = 0;
});
}
//TODO fix this
//if(Messages.IndexOf(msg)==0)
//{
// this.RefreshCommand.Execute(null);
//}
}
private FrameworkElement GetPhoto(KeyValuePair <TLMessage, GroupedMessagePosition> position, GroupedMessages groupedMessages, double left, double top)
{
var margin = 1;
var width = 320d;
var height = 420d;
var element = new ContentControl
{
Content = position.Key,
ContentTemplateSelector = App.Current.Resources["MediaTemplateSelector"] as DataTemplateSelector,
HorizontalContentAlignment = HorizontalAlignment.Stretch,
VerticalContentAlignment = VerticalAlignment.Stretch
};
element.DataContext = position.Key;
element.Width = position.Value.Width / 800d * width - margin * 2;
element.Height = height * position.Value.Height - margin * 2;
element.Margin = new Thickness(left + margin, top + margin, margin, margin);
element.HorizontalAlignment = HorizontalAlignment.Left;
element.VerticalAlignment = VerticalAlignment.Top;
return(element);
var photo = position.Key.GetPhoto();
var transferBinding = new Binding();
transferBinding.Path = new PropertyPath("IsTransferring");
transferBinding.Source = photo;
var progressBinding = new Binding();
progressBinding.Path = new PropertyPath("Progress");
progressBinding.Source = photo;
var child = new ImageView();
child.DataContext = position.Key;
child.Source = (ImageSource)DefaultPhotoConverter.Convert(photo, true);
child.Click += Click;
child.Stretch = Stretch.UniformToFill;
child.HorizontalContentAlignment = HorizontalAlignment.Center;
child.VerticalContentAlignment = VerticalAlignment.Center;
var transfer = new TransferButton();
transfer.DataContext = position.Key;
transfer.Completed += Completed;
transfer.Transferable = photo;
transfer.Style = Application.Current.Resources["MediaTransferButtonStyle"] as Style;
transfer.SetBinding(TransferButton.IsTransferringProperty, transferBinding);
transfer.SetBinding(TransferButton.ProgressProperty, progressBinding);
var grid = new Grid();
grid.Name = "Media";
grid.DataContext = position.Key;
grid.Width = position.Value.Width / 800d * width - margin * 2;
grid.Height = height * position.Value.Height - margin * 2;
grid.Margin = new Thickness(left + margin, top + margin, margin, margin);
grid.HorizontalAlignment = HorizontalAlignment.Left;
grid.VerticalAlignment = VerticalAlignment.Top;
grid.Children.Add(child);
grid.Children.Add(transfer);
return(grid);
}
