public TabViewHeader()
{
this.InitializeComponent();
// >> tabview-features-tabviewheader-csharp
RadTabView tabView = new RadTabView()
{
HeaderPosition = TabViewHeaderPosition.Bottom,
Header = new Telerik.XamarinForms.Primitives.TabViewHeader()
{
BackgroundColor = (Color)(new ColorTypeConverter()).ConvertFromInvariantString("#293955"),
OverflowButtonTemplate = new DataTemplate(() =>
{
return(new Label()
{
Text = " + ",
BackgroundColor = (Color)(new ColorTypeConverter()).ConvertFromInvariantString("#CA5100"),
Margin = new Thickness(3, 0, 3, 0)
});
}),
}
};
for (int i = 1; i <= 13; i++)
{
tabView.Items.Add(new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = string.Format("Tab{0} ", i)
});
}
// << tabview-features-tabviewheader-csharp
}
public TabViewItem()
{
this.InitializeComponent();
// >> tabview-features-tabviewitem-csharp
RadTabView tabView = new RadTabView();
Telerik.XamarinForms.Primitives.TabViewItem homeTab = new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = "Home",
Content = new Label()
{
Text = "This is the content of the Home tab",
Margin = new Thickness(10)
},
};
Telerik.XamarinForms.Primitives.TabViewItem viewTab = new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = "View",
Content = new Label()
{
Text = "This is the content of the View tab",
Margin = new Thickness(10)
},
};
StackLayout folderTabHeaderPanel = new StackLayout()
{
Orientation = StackOrientation.Horizontal,
Margin = new Thickness(5, 0, 0, 0),
};
folderTabHeaderPanel.Children.Add(new ContentView()
{
BackgroundColor = (Color)(new ColorTypeConverter()).ConvertFromInvariantString("#CA5100"),
WidthRequest = 10,
HeightRequest = 10,
VerticalOptions = LayoutOptions.Center,
});
folderTabHeaderPanel.Children.Add(new Label()
{
Text = "Folder"
});
Telerik.XamarinForms.Primitives.TabViewItem folderTab = new Telerik.XamarinForms.Primitives.TabViewItem()
{
Header = new TabViewHeaderItem()
{
Content = folderTabHeaderPanel
},
Content = new Label()
{
Text = "This is the content of the Folder tab",
Margin = new Thickness(10)
},
};
tabView.Items.Add(homeTab);
tabView.Items.Add(viewTab);
tabView.Items.Add(folderTab);
// << tabview-features-tabviewitem-csharp
}
private static void ItemsSourceChanged(BindableObject bindable, object oldValue, object newValue)
{
RadTabView tabView = (RadTabView)bindable;
IEnumerable newItemsSource = (IEnumerable)newValue;
RemoveAllTabViewItems(tabView);
INotifyCollectionChanged itemsSource = oldValue as INotifyCollectionChanged;
if (itemsSource != null)
{
itemsSource.CollectionChanged -= ItemsSource_CollectionChanged;
RemoveFromInfo(itemsSource, tabView);
}
if (newItemsSource != null)
{
foreach (object item in newItemsSource)
{
AddTabViewItem(tabView, item);
}
itemsSource = newValue as INotifyCollectionChanged;
if (itemsSource != null)
{
itemsSource.CollectionChanged += ItemsSource_CollectionChanged;
AddToInfo(itemsSource, tabView);
}
}
}
private static void RemoveAllTabViewItems(RadTabView tabView)
{
for (int i = tabView.Items.Count - 1; i >= 0; i--)
{
RemoveTabViewItem(tabView, i);
}
}
private static void RemoveTabViewItem(RadTabView tabView, int i)
{
Telerik.XamarinForms.Primitives.TabViewItem tabItem = tabView.Items[i];
tabItem.BindingContext = null;
tabItem.Header.ControlTemplate = null;
tabItem.Content = null;
tabView.Items.RemoveAt(i);
}
private static void RemoveTabViewItem(RadTabView tabView, int i)
{
TabViewItem tabItem = tabView.Items[i];
tabItem.BindingContext = null;
tabItem.Header.ControlTemplate = null;
tabItem.Content = null;
tabView.Items.RemoveAt(i);
}
private static void ItemHeaderTemplateChanged(BindableObject bindable, object oldValue, object newValue)
{
RadTabView tabView = (RadTabView)bindable;
ControlTemplate template = (ControlTemplate)newValue;
foreach (TabViewItem tabItem in tabView.Items)
{
tabItem.Header.ControlTemplate = template;
}
}
private static void InsertTabViewItem(RadTabView tabView, object item, int index)
{
Telerik.XamarinForms.Primitives.TabViewItem tabItem = new Telerik.XamarinForms.Primitives.TabViewItem();
tabItem.Header.ControlTemplate = GetItemHeaderTemplate(tabView);
tabItem.BindingContext = item;
tabItem.Content = new BindableView {
ControlTemplate = GetItemContentTemplate(tabView)
};
tabView.Items.Insert(index, tabItem);
}
private static void AddToInfo(INotifyCollectionChanged itemsSource, RadTabView tabView)
{
if (itemsSource == null)
{
return;
}
Info info = GetOrCreateInfo(itemsSource);
info.tabViews.Add(new WeakReference(tabView));
}
private static void ItemContentTemplateChanged(BindableObject bindable, object oldValue, object newValue)
{
RadTabView tabView = (RadTabView)bindable;
ControlTemplate template = (ControlTemplate)newValue;
foreach (Telerik.XamarinForms.Primitives.TabViewItem tabItem in tabView.Items)
{
tabItem.Content = new BindableView {
ControlTemplate = template
};
}
}
private static void RemoveFromInfo(INotifyCollectionChanged itemsSource, RadTabView tabView)
{
if (itemsSource == null)
{
return;
}
Info info = TryGetInfo(itemsSource);
if (info != null)
{
info.tabViews.RemoveAll(wr => wr.Target == tabView);
}
}
private static void ItemsSource_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
INotifyCollectionChanged itemsSource = (INotifyCollectionChanged)sender;
Info info = TryGetInfo(itemsSource);
if (info == null)
{
return;
}
foreach (WeakReference wr in info.tabViews)
{
RadTabView tabView = (RadTabView)wr.Target;
if (tabView == null)
{
continue;
}
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
AddTabViewItem(tabView, e.NewItems[0]);
break;
case NotifyCollectionChangedAction.Move:
tabView.Items.Move(e.OldStartingIndex, e.NewStartingIndex);
break;
case NotifyCollectionChangedAction.Remove:
RemoveTabViewItem(tabView, e.OldStartingIndex);
break;
case NotifyCollectionChangedAction.Replace:
RemoveTabViewItem(tabView, e.OldStartingIndex);
InsertTabViewItem(tabView, e.NewItems[0], e.NewStartingIndex);
break;
case NotifyCollectionChangedAction.Reset:
RemoveAllTabViewItems(tabView);
break;
default:
break;
}
}
}
public Selection()
{
// >> tabview-features-selection-csharp
RadTabView tabView = new RadTabView();
tabView.Items.Add(new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = "Home"
});
tabView.Items.Add(new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = "Folder"
});
tabView.Items.Add(new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = "View"
});
tabView.SelectedItem = tabView.Items[1];
// << tabview-features-selection-csharp
this.Content = tabView;
}
public TabViewGettingStartedCSharp()
{
// >> tabview-getting-started-csharp
RadTabView tabView = new RadTabView();
Telerik.XamarinForms.Primitives.TabViewItem homeTab = new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = "Home",
Content = new Label()
{
Text = "This is the content of the Home tab", Margin = new Thickness(10)
},
};
Telerik.XamarinForms.Primitives.TabViewItem folderTab = new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = "Folder",
Content = new Label()
{
Text = "This is the content of the Folder tab", Margin = new Thickness(10)
},
};
Telerik.XamarinForms.Primitives.TabViewItem viewTab = new Telerik.XamarinForms.Primitives.TabViewItem()
{
HeaderText = "View",
Content = new Label()
{
Text = "This is the content of the View tab", Margin = new Thickness(10)
},
};
tabView.Items.Add(homeTab);
tabView.Items.Add(folderTab);
tabView.Items.Add(viewTab);
// << tabview-getting-started-csharp
this.Content = tabView;
}
private static void AddTabViewItem(RadTabView tabView, object item)
{
InsertTabViewItem(tabView, item, tabView.Items.Count);
}
