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using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms;
using Xamarin.Forms.Internals;
namespace Xamarin.Forms.Controls
{
[Preserve (AllMembers = true)]
[Issue (IssueTracker.None, 0, "Activity Indicator Does Not Show when set to default color")]
public class ModalActivityIndicatorTest : TestContentPage
{
protected override void Init ()
{
var vm = new ModalActivityIndicatorModel () { IsBusy = false, BusyText = "Not busy" };
var button = new Button () { Text = "Make Busy" };
var colorToggle = new Button() {Text = "Toggle Activity Indicator Color" };
button.Clicked += async (sender, args) => {
vm.IsBusy = true;
vm.BusyText = "Busy";
await Task.Delay (1500);
vm.IsBusy = false;
vm.BusyText = "Not Busy";
};
var activityIndicator = new ModalActivityIndicator();
activityIndicator.BindingContext = vm;
colorToggle.Clicked += (sender, args) => {
vm.Color = vm.Color.IsDefault ? Color.Green : Color.Default;
};
Content = new StackLayout() {
Children = { button, colorToggle, activityIndicator }
};
}
[Preserve(AllMembers = true)]
public class ModalActivityIndicatorModel : INotifyPropertyChanged
{
bool _isBusy;
string _busyText;
Color _color;
public ModalActivityIndicatorModel ()
{
_color = Color.Default;
}
public bool IsBusy
{
get { return _isBusy; }
set
{
_isBusy = value;
OnPropertyChanged();
}
}
public string BusyText
{
get { return _busyText; }
set
{
_busyText = value;
OnPropertyChanged();
}
}
public Color Color
{
get { return _color; }
set
{
_color = value;
OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged ([CallerMemberName] string propertyName = null)
{
PropertyChanged?.Invoke (this, new PropertyChangedEventArgs (propertyName));
}
}
[Preserve(AllMembers = true)]
public class ModalActivityIndicator : RelativeLayout
{
public ModalActivityIndicator()
{
this.SetBinding(IsVisibleProperty, "IsBusy");
this.SetBinding(IsEnabledProperty, "IsBusy");
Children.Add(
view: new BoxView
{
Opacity = .4,
BackgroundColor = Color.FromHex("#ccc")
},
widthConstraint: Forms.Constraint.RelativeToParent((parent) => {
return parent.Width;
}),
heightConstraint: Forms.Constraint.RelativeToParent((parent) => {
return parent.Height;
})
);
var content = new StackLayout
{
BackgroundColor = Color.White,
Spacing = 10,
Padding = new Thickness(
horizontalSize: 10,
verticalSize: 20
)
};
var activityIndicator = new ActivityIndicator { IsRunning = true };
activityIndicator.SetBinding(ActivityIndicator.ColorProperty, "Color");
content.Children.Add(activityIndicator);
var label = new Label { HorizontalOptions = LayoutOptions.CenterAndExpand };
label.SetBinding(Label.TextProperty, "BusyText");
label.SetBinding(Label.TextColorProperty, "Color");
content.Children.Add(label);
Children.Add(
view: content,
widthConstraint: Forms.Constraint.RelativeToParent((parent) => {
return parent.Width / 2;
}),
heightConstraint: Forms.Constraint.RelativeToParent((parent) => {
return parent.Width / 3;
}),
xConstraint: Forms.Constraint.RelativeToParent((parent) => {
return parent.Width / 4;
}),
yConstraint: Forms.Constraint.RelativeToParent((parent) => {
return (parent.Height / 2) - (parent.Width / 6);
})
);
}
}
}
}
|
