static void EnsureTabIndex(BottomTabbedRenderer renderer)
{
var rootLayout = (RelativeLayout)renderer.GetChildAt(0);
var bottomNav = (BottomNavigationViewEx)rootLayout.GetChildAt(1);
var menu = (BottomNavigationMenu)bottomNav.Menu;
var itemIndex = menu.FindItemIndex(bottomNav.SelectedItemId);
var pageIndex = renderer.Element.Children.IndexOf(renderer.Element.CurrentPage);
if (pageIndex >= 0 && pageIndex != itemIndex && pageIndex < bottomNav.ItemCount)
{
var menuItem = menu.GetItem(pageIndex);
bottomNav.SelectedItemId = menuItem.ItemId;
if (BottomTabbedRenderer.ShouldUpdateSelectedIcon && BottomTabbedRenderer.MenuItemIconSetter != null)
{
BottomTabbedRenderer.MenuItemIconSetter?.Invoke(menuItem, renderer.Element.CurrentPage.Icon, true);
if (renderer.LastSelectedIndex != pageIndex)
{
var lastSelectedPage = renderer.Element.Children[renderer.LastSelectedIndex];
var lastSelectedMenuItem = menu.GetItem(renderer.LastSelectedIndex);
BottomTabbedRenderer.MenuItemIconSetter?.Invoke(lastSelectedMenuItem, lastSelectedPage.Icon, false);
renderer.LastSelectedIndex = pageIndex;
}
}
}
}
public static void HandlePagesChanged(this BottomTabbedRenderer renderer)
{
renderer.SetupBottomBar();
renderer.SetupTabItems();
if (renderer.Element.Children.Count == 0)
{
return;
}
EnsureTabIndex(renderer);
}
public static void SwitchPage(this BottomTabbedRenderer renderer, IMenuItem item)
{
var rootLayout = (RelativeLayout)renderer.GetChildAt(0);
var bottomNav = (BottomNavigationViewEx)rootLayout.GetChildAt(1);
var menu = (BottomNavigationMenu)bottomNav.Menu;
var index = menu.FindItemIndex(item.ItemId);
var pageIndex = index % renderer.Element.Children.Count;
var currentPageIndex = renderer.Element.Children.IndexOf(renderer.Element.CurrentPage);
if (currentPageIndex != pageIndex)
{
renderer.Element.CurrentPage = renderer.Element.Children[pageIndex];
}
}
public static RelativeLayout CreateRoot(this BottomTabbedRenderer renderer, int barId, int pageContainerId, out FrameLayout pageContainer)
{
var rootLayout = new RelativeLayout(renderer.Context)
{
LayoutParameters = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.MatchParent),
};
var pageParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.MatchParent);
pageParams.AddRule(LayoutRules.Above, barId);
pageContainer = new FrameLayout(renderer.Context)
{
LayoutParameters = pageParams,
Id = pageContainerId
};
rootLayout.AddView(pageContainer, 0, pageParams);
return(rootLayout);
}
public static BottomNavigationViewEx SetupBottomBar(this BottomTabbedRenderer renderer, Android.Widget.RelativeLayout rootLayout, BottomNavigationViewEx bottomNav, int barId)
{
if (bottomNav != null)
{
rootLayout.RemoveView(bottomNav);
bottomNav.SetOnNavigationItemSelectedListener(null);
}
var barParams = new Android.Widget.RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.MatchParent,
BottomTabbedRenderer.BottomBarHeight.HasValue ? (int)rootLayout.Context.ToPixels(BottomTabbedRenderer.BottomBarHeight.Value) : ViewGroup.LayoutParams.WrapContent);
barParams.AddRule(LayoutRules.AlignParentBottom);
bottomNav = new BottomNavigationViewEx(rootLayout.Context)
{
LayoutParameters = barParams,
Id = barId
};
if (BottomTabbedRenderer.BackgroundColor.HasValue)
{
bottomNav.SetBackgroundColor(BottomTabbedRenderer.BackgroundColor.Value);
}
if (BottomTabbedRenderer.ItemIconTintList != null)
{
bottomNav.ItemIconTintList = BottomTabbedRenderer.ItemIconTintList;
}
if (BottomTabbedRenderer.ItemTextColor != null)
{
bottomNav.ItemTextColor = BottomTabbedRenderer.ItemTextColor;
}
if (BottomTabbedRenderer.ItemBackgroundResource.HasValue)
{
bottomNav.ItemBackgroundResource = BottomTabbedRenderer.ItemBackgroundResource.Value;
}
bottomNav.SetOnNavigationItemSelectedListener(renderer);
rootLayout.AddView(bottomNav, 1, barParams);
return(bottomNav);
}
public static void SetupTabItems(this BottomTabbedRenderer renderer, BottomNavigationViewEx bottomNav, BottomTabbedConfiguration bottomTabbedConfiguration)
{
var Element = renderer.Element;
var menu = (BottomNavigationMenu)bottomNav.Menu;
menu.ClearAll();
var tabsCount = Math.Min(Element.Children.Count, bottomNav.MaxItemCount);
for (int i = 0; i < tabsCount; i++)
{
var page = Element.Children[i];
var menuItem = menu.Add(0, i, 0, page.Title);
var setter = BottomTabbedRenderer.MenuItemIconSetter ?? BottomTabbedRenderer.DefaultMenuItemIconSetter;
setter.Invoke(menuItem, page.Icon, renderer.LastSelectedIndex == i);
}
if (Element.Children.Count > 0)
{
bottomNav.EnableShiftingMode(false); //remove shifting mode
bottomNav.EnableItemShiftingMode(false); //remove shifting mode
bottomNav.EnableAnimation(false); //remove animation
if (BottomTabbedRenderer.Typeface != null)
{
bottomNav.SetTypeface(BottomTabbedRenderer.Typeface);
}
if (BottomTabbedRenderer.IconSize.HasValue)
{
bottomNav.SetIconSize(BottomTabbedRenderer.IconSize.Value, BottomTabbedRenderer.IconSize.Value);
}
if (BottomTabbedRenderer.FontSize.HasValue)
{
bottomNav.SetTextSize(BottomTabbedRenderer.FontSize.Value);
}
bottomNav.TextAlignment = Android.Views.TextAlignment.Center;
}
}
public static void ChangePage(this BottomTabbedRenderer renderer, FrameLayout pageContainer, Page page)
{
renderer.Context.HideKeyboard(renderer);
if (page == null)
{
return;
}
if (Platform.GetRenderer(page) == null)
{
Platform.SetRenderer(page, Platform.CreateRenderer(page));
}
var pageContent = Platform.GetRenderer(page).ViewGroup;
pageContainer.AddView(pageContent);
if (pageContainer.ChildCount > 1)
{
pageContainer.RemoveViewAt(0);
}
EnsureTabIndex(renderer);
}
public static void Layout(this BottomTabbedRenderer renderer, int width, int height)
{
var rootLayout = (RelativeLayout)renderer.GetChildAt(0);
var bottomNav = (BottomNavigationViewEx)rootLayout.GetChildAt(1);
var Context = renderer.Context;
rootLayout.Measure(
MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly),
MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.AtMost));
((IPageController)renderer.Element).ContainerArea = Context.CreateRect(rootLayout.MeasuredWidth, rootLayout.GetChildAt(0).MeasuredHeight);
rootLayout.Measure(
MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly),
MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.Exactly));
rootLayout.Layout(0, 0, rootLayout.MeasuredWidth, rootLayout.MeasuredHeight);
if (renderer.Element.Children.Count == 0)
{
return;
}
int tabsHeight = bottomNav.MeasuredHeight;
var item = (ViewGroup)bottomNav.GetChildAt(0);
item.Measure(
MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly),
MeasureSpecFactory.MakeMeasureSpec(tabsHeight, MeasureSpecMode.Exactly));
item.Layout(0, 0, width, tabsHeight);
int item_w = width / item.ChildCount;
for (int i = 0; i < item.ChildCount; i++)
{
var frame = (FrameLayout)item.GetChildAt(i);
frame.Measure(
MeasureSpecFactory.MakeMeasureSpec(item_w, MeasureSpecMode.Exactly),
MeasureSpecFactory.MakeMeasureSpec(tabsHeight, MeasureSpecMode.Exactly));
frame.Layout(i * item_w, 0, i * item_w + item_w, tabsHeight);
var imgView = bottomNav.GetIconAt(i);
var baselayout = frame.GetChildAt(1);
if (baselayout != null)
{
if (baselayout.GetType() == typeof(BaselineLayout))
{
//Container text
var basel = (BaselineLayout)baselayout;
//Small text
var small = bottomNav.GetSmallLabelAt(i);
//Large text
var large = bottomNav.GetLargeLabelAt(i);
//Height Container text
int baselH = Math.Max(small.Height, large.Height);
//width Container text
int baselW = Math.Min(small.Width, item_w - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Left) - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Right));
//Icon Height
int imgH = imgView.LayoutParameters.Height;
//Icon Width
int imgW = Math.Min(imgView.LayoutParameters.Width, item_w - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Left) - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Right));
int imgTop = (tabsHeight - imgH - baselH - (int)Context.ToPixels(BottomTabbedRenderer.ItemSpacing)) / 2;
int imgLeft = (item_w - imgW) / 2;
int topBaseLine = imgTop + imgH + (int)Context.ToPixels(BottomTabbedRenderer.ItemSpacing);
int leftBaseLine = (item_w - baselW) / 2;
switch (BottomTabbedRenderer.ItemAlign)
{
case ItemAlignFlags.Default:
imgTop = (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Top);
topBaseLine = tabsHeight - baselH - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Bottom);
break;
case ItemAlignFlags.Top:
imgTop = (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Top);
topBaseLine = imgTop + imgH + (int)Context.ToPixels(BottomTabbedRenderer.ItemSpacing);
break;
case ItemAlignFlags.Bottom:
imgTop = tabsHeight - imgH - baselH - (int)Context.ToPixels(BottomTabbedRenderer.ItemSpacing) - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Bottom);
topBaseLine = imgTop + imgH + (int)Context.ToPixels(BottomTabbedRenderer.ItemSpacing);
break;
}
//layout icon, text
imgView.Measure(MeasureSpecFactory.MakeMeasureSpec(imgW, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(imgH, MeasureSpecMode.Exactly));
imgView.Layout(imgLeft, imgTop, imgW + imgLeft, imgH + imgTop);
basel.Measure(MeasureSpecFactory.MakeMeasureSpec(baselW, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(tabsHeight, MeasureSpecMode.Exactly));
basel.Layout(leftBaseLine, topBaseLine, leftBaseLine + baselW, topBaseLine + baselH);
//text break
var breaktext = small.Paint.BreakText(small.Text, true, item_w - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Right) - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Left), null);
var text = small.Text;
if (text.Length > breaktext)
{
small.Text = text.Substring(0, breaktext - 1);
large.Text = text.Substring(0, breaktext - 1);
}
}
}
}
}
