public MessagesPage(int dialogId, MessagesManager messagesManager, DialogsManager dialogsManager)
{
this.dialogId = dialogId;
this.messagesManager = messagesManager;
this.dialogsManager = dialogsManager;
NavigationPage.SetHasNavigationBar(this, false);
SetBinding(RotaryFocusObjectProperty, new Binding {
Source = messagesListView
});
messagesListView.ItemsSource = messagesManager.GetMessages(dialogId);
absoluteLayout.Children.Add(messagesListView);
absoluteLayout.Children.Add(popupEntryView);
absoluteLayout.Children.Add(activityIndicator);
Content = absoluteLayout;
swipeLeftRecognizer.Command = new Command(OpenKeyboard);
swipeRightRecognizer.Command = new Command(OnOpenRecorder);
messagesListView.GestureRecognizers.Add(swipeLeftRecognizer);
messagesListView.GestureRecognizers.Add(swipeRightRecognizer);
messagesListView.ItemTapped += OnItemTapped;
messagesListView.ItemLongPressed += OnItemLongPressed;
messagesListView.ItemAppearing += OnLoadMoreMessages;
popupEntryView.Completed += OnTextCompleted;
if (dialogsManager.GetIsInitRequired(this.dialogId))
{
Appearing += OnConstructor;
}
}
/// <summary>
/// Load more messages when scroll reached the end of the page
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void OnLoadMoreMessages(object sender, ItemVisibilityEventArgs e)
{
if (dialogsManager.GetIsInitRequired(dialogId))
{
return;
}
var message = (Message)e.Item;
var messagesCount = messagesManager.GetMessagesCount(dialogId);
if (messagesCount >= Consts.BatchSize && messagesManager.IsMessageOlderThanAll(dialogId, message.Id))
{
activityIndicator.IsVisible = true;
await NetExceptionCatchHelpers.CatchNetException(
async() =>
{
await messagesManager.UpdateMessagesFromApi(dialogId, messagesCount);
messagesListView.ScrollIfExist(message, ScrollToPosition.Center);
},
() =>
{
OnLoadMoreMessages(sender, e);
return(Task.CompletedTask);
},
LocalizedStrings.MessagesNoInternetError);
activityIndicator.IsVisible = false;
}
}