void OnToolbarItemSelected(object sender, EToolbarItemEventArgs e)
{
if (_toolbar.SelectedItem == null || _isResettingToolbarItems)
{
return;
}
if (_isUpdateByCurrentPage || _isUpdateByScroller)
{
return;
}
_isUpdateByToolbar = true;
var oldPage = Element.CurrentPage;
var newPage = _itemToItemPage[_toolbar.SelectedItem];
if (oldPage != newPage)
{
oldPage?.SendDisappearing();
Element.CurrentPage = newPage;
newPage?.SendAppearing();
int index = MultiPage <Page> .GetIndex(newPage);
_scroller.ScrollTo(index, 0, true);
Element.UpdateFocusTreePolicy();
}
_isUpdateByToolbar = false;
}
/// <summary>
/// A handler that be invoked when the current page is changed from tpage.
/// </summary>
/// <param name="sender">A sender</param>
/// <param name="e">An event</param>
void OnCurrentPageChanged(object sender, EToolbarItemEventArgs e)
{
if (_tpage.SelectedItem == null)
{
return;
}
/// To send a "SendDisappearing" event for the previous current page
(Element.CurrentPage as IPageController)?.SendDisappearing();
/// To set the new current page, show it and send a "SendAppearing" event for it
Element.CurrentPage = _pageInfo[_tpage.SelectedItem].Page;
ShowCurrentPage(_pageInfo[_tpage.SelectedItem]);
(Element.CurrentPage as IPageController)?.SendAppearing();
}
void OnCurrentPageChanged(object sender, EToolbarItemEventArgs e)
{
if (_tpage.SelectedItem == null)
{
return;
}
if (_tcontent != null)
{
_tcontent.Hide();
_box.UnPack(_tcontent);
(Element.CurrentPage as IPageController)?.SendDisappearing();
}
Element.CurrentPage = _itemToItemPage[_tpage.SelectedItem];
_tcontent = Platform.GetOrCreateRenderer(Element.CurrentPage).NativeView;
_tcontent.SetAlignment(-1, -1);
_tcontent.SetWeight(1, 1);
_tcontent.Show();
_box.PackEnd(_tcontent);
(Element.CurrentPage as IPageController)?.SendAppearing();
}
void OnToolbarItemSelected(object sender, EToolbarItemEventArgs e)
{
if (_toolbar.SelectedItem == null || _isResettingToolbarItems)
{
return;
}
var oldPage = Element.CurrentPage;
var newPage = _itemToItemPage[_toolbar.SelectedItem];
if (oldPage == newPage)
{
return;
}
oldPage?.SendDisappearing();
Element.CurrentPage = newPage;
newPage?.SendAppearing();
int index = MultiPage <Page> .GetIndex(newPage);
_scroller.ScrollTo(index, 0, true);
}