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using System;
using System.ComponentModel;
using System.Windows.Media.Imaging;
using Microsoft.Phone.Controls;
namespace Xamarin.Forms.Platform.WinPhone
{
internal class NavigationMenuRenderer : ViewRenderer<NavigationMenu, System.Windows.Controls.Grid>
{
const int Spacing = 12;
protected override void OnElementChanged(ElementChangedEventArgs<NavigationMenu> e)
{
base.OnElementChanged(e);
var grid = new System.Windows.Controls.Grid();
grid.ColumnDefinitions.Add(new System.Windows.Controls.ColumnDefinition { Width = System.Windows.GridLength.Auto });
grid.ColumnDefinitions.Add(new System.Windows.Controls.ColumnDefinition { Width = System.Windows.GridLength.Auto });
UpdateItems(grid);
SetNativeControl(grid);
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
switch (e.PropertyName)
{
case "Targets":
UpdateItems(Control);
break;
}
}
TileSize GetSize()
{
return RenderSize.Width >= 210 * 2 + Spacing ? TileSize.Medium : TileSize.Default;
}
void UpdateItems(System.Windows.Controls.Grid grid)
{
grid.Children.Clear();
grid.RowDefinitions.Clear();
var x = 0;
var y = 0;
foreach (Page target in Element.Targets)
{
if (x > 1)
{
x = 0;
y++;
}
if (x == 0)
grid.RowDefinitions.Add(new System.Windows.Controls.RowDefinition());
var hubTile = new HubTile { Title = target.Title, Source = new BitmapImage(new Uri(target.Icon, UriKind.Relative)), Margin = new System.Windows.Thickness(0, 0, Spacing, Spacing) };
if (target.BackgroundColor != Color.Default)
hubTile.Background = target.BackgroundColor.ToBrush();
Page tmp = target;
hubTile.Tap += (sender, args) => Element.SendTargetSelected(tmp);
hubTile.SetValue(System.Windows.Controls.Grid.RowProperty, y);
hubTile.SetValue(System.Windows.Controls.Grid.ColumnProperty, x);
hubTile.Size = GetSize();
var weakRef = new WeakReference(hubTile);
SizeChanged += (sender, args) =>
{
if (weakRef.IsAlive)
((HubTile)weakRef.Target).Size = GetSize();
((IVisualElementController)Element).NativeSizeChanged();
};
x++;
grid.Children.Add(hubTile);
}
}
}
}
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