protected override void OnApplyTemplate()
{
base.OnApplyTemplate();
_moreButton = GetTemplateChild(MoreButton) as Button;
_overflowPopup = GetTemplateChild(OverflowPopup) as Popup;
_primaryItemsControl = GetTemplateChild(PrimaryItemsControl) as ItemsControl;
_secondaryItemsControl = GetTemplateChild(SecondaryItemsControl) as ItemsControl;
#if __ANDROID__ || __IOS__
Presenter = this.FindFirstChild <NativeCommandBarPresenter>();
#endif
if (_moreButton != null)
{
_moreButton.Click += (s, e) =>
{
IsOpen = !IsOpen;
};
}
if (_overflowPopup != null)
{
_overflowPopup.Closed += (s, e) =>
{
IsOpen = false;
};
}
PrimaryCommands.VectorChanged += (s, e) => UpdateCommands();
SecondaryCommands.VectorChanged += (s, e) => UpdateCommands();
UpdateCommands();
this.RegisterPropertyChangedCallback(IsEnabledProperty, (s, e) => UpdateCommonState());
this.RegisterPropertyChangedCallback(ClosedDisplayModeProperty, (s, e) => UpdateDisplayModeState());
this.RegisterPropertyChangedCallback(IsOpenProperty, (s, e) =>
{
// TODO: Consider the content of _secondaryItemsControl when IsDynamicOverflowEnabled is supported.
var hasSecondaryItems = SecondaryCommands.Any();
if (hasSecondaryItems)
{
if (_overflowPopup != null)
{
_overflowPopup.IsOpen = true;
}
}
UpdateDisplayModeState();
UpdateButtonsIsCompact();
});
UpdateCommonState();
UpdateDisplayModeState();
UpdateButtonsIsCompact();
}
private void TryRemoveSecondarySeparator()
{
if (SecondaryCommands.Any(x => x is AppBarSeparator) && (
SecondaryCommands.Count == 0 ||
!SecondaryCommands.Any(x => x is NavAppBarButton) ||
!SecondaryCommands.Any(x => x is ISortableAppBarButton)
))
{
int separatorIndex = SecondaryCommands.IndexOf(SecondaryCommands.First(x => x is AppBarSeparator));
SecondaryCommands.RemoveAt(separatorIndex);
}
}
private void InsertToSecondaryBar(NavAppBarButton buttonToMove)
{
buttonToMove.IsSecondaryCommand = true;
if (SecondaryCommands.Any(x => x is MovableAppBarButton) && !SecondaryCommands.Any(x => x is AppBarSeparator))
{
SecondaryCommands.Insert(0, new AppBarSeparator());
}
int separatorIndex = -1;
if (SecondaryCommands.Any(x => x is AppBarSeparator))
{
separatorIndex = SecondaryCommands.IndexOf(SecondaryCommands.First(x => x is AppBarSeparator));
}
int endIndex = separatorIndex != -1 ? separatorIndex - 1 : SecondaryCommands.Count - 1;
if (endIndex == -1) //nothing in the SecondaryCommands list yet
{
SecondaryCommands.Add(buttonToMove);
}
else //we've got at least one other SecondaryCommand, maybe more
{
for (int i = 0; i <= endIndex; i++)
{
int currCommandPosition = ((ISortableAppBarButton)SecondaryCommands[i]).Position;
if (buttonToMove.Position < currCommandPosition)
{
SecondaryCommands.Insert(i, buttonToMove);
return;
}
}
//if we get through the entire list and we don't find anything of a lesser priority, the new button belongs at the end
SecondaryCommands.Insert(endIndex, buttonToMove);
}
}
private void InsertToSecondaryBar(ICommandBarElement buttonToMove)
{
((ISortableAppBarButton)buttonToMove).IsSecondaryCommand = true;
if (SecondaryCommands.Any(x => x is NavAppBarButton) && !SecondaryCommands.Any(x => x is AppBarSeparator))
{
SecondaryCommands.Add(new AppBarSeparator());
}
int separatorIndex = -1;
if (SecondaryCommands.Any(x => x is AppBarSeparator))
{
separatorIndex = SecondaryCommands.IndexOf(SecondaryCommands.First(x => x is AppBarSeparator));
}
int startIndex = separatorIndex != -1 ? separatorIndex + 1 : 0;
if (startIndex == 0)
{
SecondaryCommands.Add(buttonToMove);
}
else
{
for (int i = startIndex; i < SecondaryCommands.Count; i++)
{
int currCommandPosition = ((ISortableAppBarButton)SecondaryCommands[i]).Position;
if (((ISortableAppBarButton)buttonToMove).Position < currCommandPosition)
{
SecondaryCommands.Insert(i, buttonToMove);
return;
}
}
//if we get through the entire list and we don't find anything of a lesser priority, the new button belongs at the end
SecondaryCommands.Add(buttonToMove);
}
}
