public void ItemSelected(UICollectionView collectionView, NSIndexPath indexPath)
{
if (indexPath.Item == CurrentIndex) return;
ButtonBarView.MoveTo(indexPath.Item, true, SwipeDirection.None, PagerScroll.Yes);
ShouldUpdateButtonBarView = false;
var oldCell = ButtonBarView.CellForItem(NSIndexPath.FromItemSection(CurrentIndex, 0)) as ButtonBarViewCell;
var newCell = ButtonBarView.CellForItem(NSIndexPath.FromItemSection(indexPath.Item, 0)) as ButtonBarViewCell;
if (PagerBehaviour.ProgressiveIndicator)
{
if (ChangeCurrentIndexProgressive != null)
{
ChangeCurrentIndexProgressive(oldCell, newCell, 1f, true, true);
}
}
else
{
if (ChangeCurrentIndex != null)
{
ChangeCurrentIndex(oldCell, newCell, true);
}
}
MoveToViewController(indexPath.Item);
}
void ReleaseDesignerOutlets()
{
if (ButtonBarView != null)
{
ButtonBarView.Dispose();
ButtonBarView = null;
}
}
public void UpdateIndicator(PagerTabStripViewController viewController, nint fromIndex, nint toIndex, nfloat progressPercentage, bool indexWasChanged)
{
if (!ShouldUpdateButtonBarView) return;
ButtonBarView.Move(fromIndex, toIndex, progressPercentage, PagerScroll.Yes);
if (ChangeCurrentIndexProgressive != null)
{
var oldCell = ButtonBarView.CellForItem(NSIndexPath.FromItemSection(CurrentIndex != fromIndex ? fromIndex : toIndex, 0)) as ButtonBarViewCell;
var newCell = ButtonBarView.CellForItem(NSIndexPath.FromItemSection(CurrentIndex, 0)) as ButtonBarViewCell;
ChangeCurrentIndexProgressive(oldCell, newCell, progressPercentage, indexWasChanged, true);
}
}
public override void ReloadPagerTabStripView()
{
base.ReloadPagerTabStripView();
if (IsViewLoaded)
{
ButtonBarView.ReloadData();
CachedCellWidths = CalculateWidths();
ButtonBarView.MoveTo(CurrentIndex, false, SwipeDirection.None, PagerScroll.Yes);
}
}
public void UpdateIndicator(PagerTabStripViewController viewController, nint fromIndex, nint toIndex)
{
if (!ShouldUpdateButtonBarView) return;
ButtonBarView.MoveTo(toIndex, true, toIndex < fromIndex ? SwipeDirection.Right : SwipeDirection.Left, PagerScroll.Yes);
if (ChangeCurrentIndex != null)
{
var oldCell = ButtonBarView.CellForItem(NSIndexPath.FromItemSection(CurrentIndex != fromIndex ? fromIndex : toIndex, 0)) as ButtonBarViewCell;
var newCell = ButtonBarView.CellForItem(NSIndexPath.FromItemSection(CurrentIndex, 0)) as ButtonBarViewCell;
ChangeCurrentIndex(oldCell, newCell, true);
}
}
public override void ViewDidLayoutSubviews()
{
base.ViewDidLayoutSubviews();
if (IsViewAppearing || IsViewRotating)
{
CachedCellWidths = CalculateWidths();
ButtonBarView.CollectionViewLayout.InvalidateLayout();
ButtonBarView.MoveTo(CurrentIndex, false, SwipeDirection.None, PagerScroll.ScrollOnlyIfOutOfScreen);
}
}
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
ButtonBarView.LayoutIfNeeded();
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
ButtonBarItemSpec = ButtonBarItemSpec.NibFile(
nibName: "ButtonCell",
bundle: NSBundle.FromClass(new ObjCRuntime.Class(typeof(ButtonBarViewCell))),
width: (childItemInfo) =>
{
var label = new UILabel();
label.TranslatesAutoresizingMaskIntoConstraints = false;
label.Font = this.Settings.Style.ButtonBarItemFont;
label.Text = childItemInfo.Title;
var labelSize = label.IntrinsicContentSize;
return labelSize.Width + (this.Settings.Style.ButtonBarItemLeftRightMargin?? 8) * 2;
});
UICollectionViewFlowLayout flowLayout;
if (ButtonBarView == null)
{
flowLayout = new UICollectionViewFlowLayout();
flowLayout.ScrollDirection = UICollectionViewScrollDirection.Horizontal;
var buttonBarHeight = Settings.Style.ButtonBarHeight ?? 44f;
var buttonBar = new ButtonBarView(new CGRect(0, 0, View.Frame.Width, buttonBarHeight), flowLayout);
buttonBar.BackgroundColor = UIColor.Orange;
buttonBar.SelectedBar.BackgroundColor = UIColor.Black;
buttonBar.AutoresizingMask = UIViewAutoresizing.FlexibleWidth;
var newContainerViewFrame = ContainerView.Frame;
newContainerViewFrame.Y = buttonBarHeight;
newContainerViewFrame.Height = ContainerView.Frame.Height - (buttonBarHeight - ContainerView.Frame.Y);
ContainerView.Frame = newContainerViewFrame;
ButtonBarView = buttonBar;
}
if (ButtonBarView.Superview == null)
{
View.AddSubview(ButtonBarView);
}
if (ButtonBarView.Delegate == null)
{
ButtonBarView.Delegate = this;
}
if (ButtonBarView.DataSource == null)
{
ButtonBarView.DataSource = this;
}
ButtonBarView.ScrollsToTop = false;
flowLayout = ButtonBarView.CollectionViewLayout as UICollectionViewFlowLayout;
flowLayout.ScrollDirection = UICollectionViewScrollDirection.Horizontal;
flowLayout.MinimumInteritemSpacing = 0;
flowLayout.MinimumLineSpacing = Settings.Style.ButtonBarMinimumLineSpacing ?? flowLayout.MinimumLineSpacing;
var sectionInset = flowLayout.SectionInset;
flowLayout.SectionInset = new UIEdgeInsets(sectionInset.Top,
Settings.Style.ButtonBarLeftContentInset ?? sectionInset.Left,
sectionInset.Bottom,
Settings.Style.ButtonBarRightContentInset ?? sectionInset.Right);
ButtonBarView.ShowsHorizontalScrollIndicator = false;
ButtonBarView.BackgroundColor = Settings.Style.ButtonBarBackgroundColor ?? ButtonBarView.BackgroundColor;
ButtonBarView.SelectedBar.BackgroundColor = Settings.Style.SelectedBarBackgroundColor;
ButtonBarView.SelectedBarHeight = Settings.Style.SelectedBarHeight;
switch (ButtonBarItemSpec.ButtonBarItemSpecType)
{
case ButtonBarItemSpecType.NibFile:
{
ButtonBarView.RegisterNibForCell(UINib.FromName(ButtonBarItemSpec.NibName, ButtonBarItemSpec.Bundle), "Cell");
}
break;
case ButtonBarItemSpecType.CellClass:
{
ButtonBarView.RegisterClassForCell(typeof(ButtonBarViewCell), "Cell");
}
break;
}
}