/
AdaptiveTrigger.cs
77 lines (62 loc) · 1.81 KB
/
AdaptiveTrigger.cs
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using System;
namespace Xamarin.Forms
{
public sealed class AdaptiveTrigger : StateTriggerBase
{
public AdaptiveTrigger()
{
UpdateState();
}
public double MinWindowHeight
{
get => (double)GetValue(MinWindowHeightProperty);
set => SetValue(MinWindowHeightProperty, value);
}
public static readonly BindableProperty MinWindowHeightProperty =
BindableProperty.Create(nameof(MinWindowHeight), typeof(double), typeof(AdaptiveTrigger), -1d,
propertyChanged: OnMinWindowHeightChanged);
static void OnMinWindowHeightChanged(BindableObject bindable, object oldvalue, object newvalue)
{
((AdaptiveTrigger)bindable).UpdateState();
}
public double MinWindowWidth
{
get => (double)GetValue(MinWindowWidthProperty);
set => SetValue(MinWindowWidthProperty, value);
}
public static readonly BindableProperty MinWindowWidthProperty =
BindableProperty.Create(nameof(MinWindowWidthProperty), typeof(double), typeof(AdaptiveTrigger), -1d,
propertyChanged: OnMinWindowWidthChanged);
static void OnMinWindowWidthChanged(BindableObject bindable, object oldvalue, object newvalue)
{
((AdaptiveTrigger)bindable).UpdateState();
}
protected override void OnAttached()
{
base.OnAttached();
if (!DesignMode.IsDesignModeEnabled)
{
UpdateState();
Application.Current.MainPage.SizeChanged += OnSizeChanged;
}
}
protected override void OnDetached()
{
base.OnDetached();
Application.Current.MainPage.SizeChanged -= OnSizeChanged;
}
void OnSizeChanged(object sender, EventArgs e)
{
UpdateState();
}
void UpdateState()
{
var scaledScreenSize = Device.Info.ScaledScreenSize;
var w = scaledScreenSize.Width;
var h = scaledScreenSize.Height;
var mw = MinWindowWidth;
var mh = MinWindowHeight;
SetActive(w >= mw && h >= mh);
}
}
}