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using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using WButton = System.Windows.Controls.Button;
namespace Xamarin.Forms.Platform.WinPhone
{
public class StepperRenderer : ViewRenderer<Stepper, Border>
{
readonly StackPanel _panel = new StackPanel();
WButton _downButton;
WButton _upButton;
IElementController ElementController => Element as IElementController;
protected override void OnElementChanged(ElementChangedEventArgs<Stepper> e)
{
base.OnElementChanged(e);
var border = new Border();
border.Child = _panel;
_panel.HorizontalAlignment = HorizontalAlignment.Right;
_panel.Orientation = Orientation.Horizontal;
_upButton = new WButton { Content = "+", Width = 100 };
_downButton = new WButton { Content = "-", Width = 100 };
_panel.Children.Add(_downButton);
_panel.Children.Add(_upButton);
SetNativeControl(border);
_upButton.Click += UpButtonOnClick;
_downButton.Click += DownButtonOnClick;
UpdateButtons();
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
switch (e.PropertyName)
{
case "Minimum":
case "Maximum":
case "Value":
UpdateButtons();
break;
}
}
void DownButtonOnClick(object sender, RoutedEventArgs routedEventArgs)
{
ElementController.SetValueFromRenderer(Stepper.ValueProperty, Math.Max(Element.Minimum, Element.Value - Element.Increment));
}
void UpButtonOnClick(object sender, RoutedEventArgs routedEventArgs)
{
ElementController.SetValueFromRenderer(Stepper.ValueProperty, Math.Min(Element.Maximum, Element.Value + Element.Increment));
}
void UpdateButtons()
{
_upButton.IsEnabled = Element.Value < Element.Maximum;
_downButton.IsEnabled = Element.Value > Element.Minimum;
}
}
}
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