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;
}
}
else if (renderer.LastSelectedIndex != pageIndex)
{
renderer.LastSelectedIndex = pageIndex;
}
}
}
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);
return;
}
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);
var menuItems = bottomNav.GetBottomNavigationItemViews();
var count = menuItems.Length;
if (count == 0)
{
return;
}
var itemWidth = width / count;
for (int i = 0; i < count; i++)
{
var menu = menuItems[i];
menu.Measure(
MeasureSpecFactory.MakeMeasureSpec(itemWidth, MeasureSpecMode.Exactly),
MeasureSpecFactory.MakeMeasureSpec(tabsHeight, MeasureSpecMode.Exactly));
menu.Layout(i * itemWidth, 0, itemWidth * (i + 1), tabsHeight);
}
}
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)
{
bottomNav.SelectedItemId = menu.GetItem(pageIndex).ItemId;
}
}
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 void SwitchPage(this BottomTabbedRenderer renderer, IMenuItem item)
{
var rootLayout = (RelativeLayout)renderer.GetChildAt(0);
var bottomNav = (BottomNavigationViewEx)rootLayout.GetChildAt(1);
var menu = (BottomNavigationMenu)bottomNav.Menu;
renderer.CurrentMenuItemId = item.ItemId;
var index = menu.FindItemIndex(item.ItemId);
var pageIndex = index % renderer.Element.Children.Count;
var currentPageIndex = renderer.Element.Children.IndexOf(renderer.Element.CurrentPage);
if (pageIndex == currentPageIndex)
{
if (renderer.Element.CurrentPage is NavigationPage nav)
{
nav.Navigation.PopToRootAsync();
}
}
else
{
renderer.Element.CurrentPage = renderer.Element.Children[pageIndex];
}
}
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 (BottomTabbedRenderer.VisibleTitle == false)
{
baselayout.Visibility = ViewStates.Gone;
//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 - (int)Context.ToPixels(BottomTabbedRenderer.ItemSpacing)) / 2;
int imgLeft = (item_w - imgW) / 2;
switch (BottomTabbedRenderer.ItemAlign)
{
case ItemAlignFlags.Default:
case ItemAlignFlags.Top:
imgTop = (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Top);
break;
case ItemAlignFlags.Bottom:
imgTop = tabsHeight - imgH - (int)Context.ToPixels(BottomTabbedRenderer.ItemPadding.Bottom);
break;
}
//layout icon
imgView.Measure(MeasureSpecFactory.MakeMeasureSpec(imgW, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(imgH, MeasureSpecMode.Exactly));
imgView.Layout(imgLeft, imgTop, imgW + imgLeft, imgH + imgTop);
continue;
}
if (baselayout != null)
{
baselayout.Visibility = ViewStates.Visible;
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);
}
}
}
}
}
