private void ChildrenView_ItemSelected(object sender, SelectedItemChangedEventArgs e)
{
MorePageItem item = e.SelectedItem as MorePageItem;
if (item != null)
{
// Tell PageItem to execute the registered Action (typically: open page).
item.OnClicked();
}
ChildrenView.SelectedItem = null;
}
private void TabPages_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
foreach (var item in e.NewItems)
{
TabPage tabPage = item as TabPage;
if (TabPages.Count < MaxTabs + 1)
{
this.Children.Add(tabPage);
}
else
{
// Can't show the page
// Add page as a child to MorePage
MorePageItem pageItem = new MorePageItem(tabPage,
() =>
{
ContentPage newPage = tabPage.CreateContentPageInstance();
Navigation.PushAsync(newPage);
});
// Check if it must be presented in 'MorePage' or in a dropdown list
if (MorePagesMode == MorePagesAccessMode.MorePage)
{
// Must be shown under 'More' page list.
if (TabPages.Count == MaxTabs + 1)
{
// This is the first page to be added.
// Add a MorePage tabPage in case of iOS and a MorePage toolbaricon otherwise
string moreTitle = string.IsNullOrEmpty(MorePageTitle) ? "More" : MorePageTitle;
_morePage = new MorePage(moreTitle);
if (Device.RuntimePlatform == Device.iOS)
{
this.Children.Add(_morePage);
}
else
{
var moreToolbarItem = new ToolbarItem(moreTitle, MoreToolbarIcon,
() =>
{
Navigation.PushAsync(_morePage);
}, Device.RuntimePlatform == Device.Android ? ToolbarItemOrder.Primary : ToolbarItemOrder.Primary, 100);
SetMoreToolbarItem(moreToolbarItem);
}
}
_morePage.MorePageItems.Add(pageItem);
}
else
{
// Must be shown in the 'More' popupmenu list.
if (TabPages.Count == MaxTabs + 1)
{
// This is the first page to be added.
// Add a 'More' popupmenu toolbaricon
string moreTitle = string.IsNullOrEmpty(MorePageTitle) ? "More" : MorePageTitle;
var moreToolbarItem = new ToolbarItem(moreTitle, MoreToolbarIcon,
async() =>
{
// Show PopupMenu
if (_activeTabPage != null &&
_activeTabPage.ContentBaseLayout != null)
{
try
{
var menuPopup = new MorePopupMenuPage(MorePopupMenuItems,
MorePopupMenuMargin,
MorePopupMenuItemHeigth)
{
MenuItemSelectedBackgroundColor = MorePopupMenuItemSelectedBackgroundColor,
MenuItemTextColor = MorePopupMenuItemTextColor,
MenuItemSeperatorColor = MorePopupMenuItemSeperatorColor,
MenuItemSeperatorVisibility = MorePopupMenuItemSeperatorVisibility,
MenuBackgroundColor = MorePopupMenuBackgroundColor,
};
await Navigation.PushPopupAsync(menuPopup);
}
catch (Exception ex)
{
throw new Exception("Please install nuget package rg.plugins.popup");
}
}
}, ToolbarItemOrder.Primary, 100);
SetMoreToolbarItem(moreToolbarItem);
}
MorePopupMenuItems.Add(pageItem);
}
}
}
break;
}
case NotifyCollectionChangedAction.Remove:
int pageStartIdx = e.OldStartingIndex;
foreach (var item in e.OldItems)
{
TabPage tabPage = item as TabPage;
// Check if removed page was visible
if (this.Children.Contains(tabPage))
{
// Yes
this.Children.Remove(tabPage);
int mTabs = (Device.RuntimePlatform == Device.iOS) ? MaxTabs + 1 : MaxTabs;
if (!DontMovePages &&
this.Children.Count < mTabs)
{
// We can bring the first hidden page to the main view.
// Check if this page is under "MorePage" or under "MorePopupMenu"
if (MorePagesMode == MorePagesAccessMode.MorePage)
{
// Page is under 'More'.
// Remove it under "More"
_morePage.MorePageItems.RemoveAt(0);
// Check if there are still other pages under "More"
if (_morePage.MorePageItems.Count == 0)
{
// No: Remove MorePage tabPage in case of iOS and the MorePage toolbar item otherwise
if (Device.RuntimePlatform == Device.iOS)
{
this.Children.Remove(_morePage);
_morePage = null;
}
else
{
ResetMoreToolbarItem();
}
}
}
else
{
// First hidden page is in MorePopupMenu
MorePopupMenuItems.RemoveAt(0);
// Check if there are still other pages under "More"
if (MorePopupMenuItems.Count == 0)
{
// No: Remove the MorePopupMenu toolbar item
ResetMoreToolbarItem();
}
}
// Bring in the hidden tab page
var hiddenPage = this.TabPages[MaxTabs - 1];
int insertIndex = (Device.RuntimePlatform == Device.iOS) ? MaxTabs - 1 : MaxTabs;
this.Children.Insert(insertIndex, hiddenPage);
}
}
else if (_morePage != null)
{
// No, removed page was under "MorePage"
var itemPage = _morePage.MorePageItems.FirstOrDefault(i => i.TabPage == tabPage);
if (itemPage != null)
{
_morePage.MorePageItems.Remove(itemPage);
}
if (TabPages.Count == MaxTabs + 1)
{
if (Device.RuntimePlatform == Device.iOS)
{
this.Children.Remove(_morePage);
_morePage = null;
}
else
{
ResetMoreToolbarItem();
}
}
}
else
{
// No, removed page was under MorePopupMenu
var entry = MorePopupMenuItems.FirstOrDefault(p => p.TabPage == tabPage);
if (entry != null)
{
MorePopupMenuItems.Remove(entry);
// Remove MorePopupMenu toolbar item if there are no pages anymore in MorePopupMenu
if (MorePopupMenuItems.Count == 0)
{
ResetMoreToolbarItem();
}
}
}
}
break;
case NotifyCollectionChangedAction.Reset:
this.Children.Clear();
// this.ToolbarItems.Clear();
this.MorePopupMenuItems.Clear();
if (_morePage != null)
{
_morePage.MorePageItems.Clear();
}
_moreToolbarItem = null;
_morePage = null;
break;
}
}