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using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
namespace Xamarin.Forms.Controls
{
[Preserve (AllMembers = true)]
internal class Item
: INotifyPropertyChanged
{
string _title;
string _content;
public string InsertTabText { get; set; }
public string ChangeTitleText { get; set; }
public string MoveTabText { get; set; }
public string RemoveTabText { get; set; }
public string ResetAllTabsText { get; set; }
public string NextPageText { get; set; }
public string DelayedResetText { get; set; }
public string Icon { get; set; }
public string Title
{
get { return _title; }
set
{
if (_title == value)
return;
_title = value;
OnPropertyChanged();
}
}
public string Content
{
get { return _content; }
set
{
if (_content == value)
return;
_content = value;
OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged ([CallerMemberName] string propertyName = null)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
handler (this, new PropertyChangedEventArgs (propertyName));
}
}
internal class TemplatedTabbedGallery : TabbedPage
{
ObservableCollection<Item> _items;
int _count = 0;
public TemplatedTabbedGallery()
{
Title = "Templated Tabbed Gallery";
_items = new ObservableCollection<Item> {
CreateItem(),
CreateItem()
};
ItemsSource = _items;
ItemTemplate = new DataTemplate (() => {
var page = new ContentPage();
page.SetBinding (TitleProperty, "Title");
page.SetBinding (IconProperty, "Icon");
var layout = new StackLayout();
var label = new Label();
label.SetBinding (Label.TextProperty, "Content");
layout.Children.Add (label);
var add = new Button ();
add.SetBinding (Button.TextProperty, "InsertTabText");
add.Clicked += (sender, args) => _items.Insert (_items.IndexOf ((Item)add.BindingContext) + 1, CreateItem());
layout.Children.Add (add);
var titleNum = 0;
var change = new Button ();
change.SetBinding (Button.TextProperty, "ChangeTitleText");
change.Clicked += (sender, args) => ((Item) change.BindingContext).Title = ("Title: " + titleNum++);
layout.Children.Add (change);
var move = new Button ();
move.SetBinding (Button.TextProperty, "MoveTabText");
move.Clicked += (sender, args) => {
int originalIndex = _items.IndexOf ((Item) add.BindingContext);
int index = originalIndex + 1;
if (index == _items.Count)
index = 0;
_items.Move (originalIndex, index);
};
layout.Children.Add (move);
var remove = new Button ();
remove.SetBinding (Button.TextProperty, "RemoveTabText");
remove.Clicked += (sender, args) => {
if (_items.Count == 0) {
layout.Children.Add (new Label {
Text = "No more tabs"
});
}
_items.Remove ((Item)remove.BindingContext);
};
layout.Children.Add (remove);
var reset = new Button ();
reset.SetBinding (Button.TextProperty, "ResetAllTabsText");
reset.Clicked += (sender, args) => {
_count = 0;
ItemsSource = _items = new ObservableCollection<Item> { CreateItem(), CreateItem() };
};
layout.Children.Add (reset);
var nextPage = new Button ();
nextPage.SetBinding (Button.TextProperty, "NextPageText");
nextPage.Clicked += (sender, args) => {
int index = _items.IndexOf ((Item) nextPage.BindingContext) + 1;
if (index == _items.Count)
index = 0;
SelectedItem = _items[index];
};
layout.Children.Add (nextPage);
page.Content = new ScrollView {
Padding = new Thickness (20, 0),
Content = layout
};
return page;
});
}
Item CreateItem()
{
int x = _count++;
var item = new Item {
Title = "Page " + x,
Content = "Lorem ipsum dolor sit amet #" + x ,
InsertTabText = "Insert Tab: " + x,
ChangeTitleText = "Change title: " + x,
MoveTabText = "Move Tab: " + x,
RemoveTabText = "Remove Tab: " + x,
ResetAllTabsText = "Reset all tabs: " + x,
NextPageText = "Next Page: " + x
};
if (x == 0)
item.Icon = "bank.png";
return item;
}
}
}
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