void Initialize()
{
BindingContext = _viewModel;
NavigationPage.SetHasNavigationBar(this, false);
var bg = new Gradient()
{
Rotation = 150,
Steps = new GradientStepCollection()
{
new GradientStep((Color)Application.Current.Resources["topGradient"], 0),
new GradientStep((Color)Application.Current.Resources["bottomGradient"], 1)
}
};
NavigationPage.SetHasNavigationBar(this, false);
ContentPageGloss.SetBackgroundGradient(this, bg);
if (Hud.Instance == null)
{
Hud.Instance = this;
}
Analytics.TrackEvent($"{GetType().Name} loaded");
}
/// <summary>
/// <see cref="T:Xamarin.Forms.Platform.iOS.PageRenderer"/> override that is called whenever the associated
/// <see cref="T:Xamarin.Forms.ContentPage"/> instance changes
/// </summary>
/// <param name="e"><see cref="T:Xamarin.Forms.Platform.iOS.VisualElementChangedEventArgs"/> that specifies the
/// previously and newly assigned <see cref="T:Xamarin.Forms.ContentPage"/> instances
/// </param>
protected override void OnElementChanged(VisualElementChangedEventArgs e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
e.OldElement.PropertyChanging -= OnElementPropertyChanging;
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
Gradient bkgrndGradient = ContentPageGloss.GetBackgroundGradient(e.OldElement);
if (bkgrndGradient != null)
{
bkgrndGradient.DetachRenderer(this);
}
}
if (e.NewElement != null)
{
e.NewElement.PropertyChanging += OnElementPropertyChanging;
e.NewElement.PropertyChanged += OnElementPropertyChanged;
Gradient bkgrndGradient = ContentPageGloss.GetBackgroundGradient(Element);
if (bkgrndGradient != null)
{
bkgrndGradient.AttachRenderer(ContentPageGloss.BackgroundGradientProperty.PropertyName,
this);
}
}
}
public MyPage()
{
var bkgrndGradient = new Gradient()
{
Rotation = 150,
Steps = new GradientStepCollection()
{
new GradientStep(Color.Red, 0),
new GradientStep(Color.White, .25),
new GradientStep(Color.Blue, .5),
new GradientStep(Color.Green, .75),
new GradientStep(Color.BurlyWood, 1),
// new GradientStep(Color.FromHex("#ccd9ff"), 1)
// new GradientStep(Color.Black, 1)
}
};
ContentPageGloss.SetBackgroundGradient(this, bkgrndGradient);
Content = new StackLayout
{
Children =
{
new Label {
Text = "Hello ContentPage"
}
}
};
}
/// <summary>
/// Private event handler that is called whenever a <see cref="T:Xamarin.Forms.BindableObject.PropertyChanging"/>
/// event is fired.
/// </summary>
/// <param name="sender">Sender.</param>
/// <param name="args">Property changing event arguments</param>
void OnElementPropertyChanging(object sender, Xamarin.Forms.PropertyChangingEventArgs args)
{
if (args.PropertyName == ContentPageGloss.BackgroundGradientProperty.PropertyName)
{
Gradient bkgrndGradient = ContentPageGloss.GetBackgroundGradient(Element);
if (bkgrndGradient != null)
{
bkgrndGradient.DetachRenderer(this);
}
}
}
/// <summary>
/// <see cref="T:Xamarin.Forms.Platform.Android.PageRenderer"/> override that is called whenever the
/// <see cref="T:Xamarin.Forms.ContentPage.PropertyChanged"/> event is fired
/// </summary>
/// <param name="sender">Sender.</param>
/// <param name="e">E.</param>
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == ContentPageGloss.BackgroundGradientProperty.PropertyName)
{
Gradient bkgrndGradient = ContentPageGloss.GetBackgroundGradient(Element);
if (bkgrndGradient != null)
{
bkgrndGradient.AttachRenderer(ContentPageGloss.BackgroundGradientProperty.PropertyName, this);
}
}
}
public AboutPage()
{
//BackgroundColor = Color.Red;
var bkgrndGradient = new Gradient()
{
Rotation = 150,
Steps = new GradientStepCollection()
{
//new GradientStep(Color.Red, 0),
new GradientStep(Color.White, .25),
new GradientStep(Color.FromHex("#ccd9ff"), 1)
//new GradientStep(Color.Blue, .5),
//new GradientStep(Color.Green, .75),
//new GradientStep(Color.BurlyWood, 1),
// new GradientStep(Color.Black, 1)
}
};
ContentPageGloss.SetBackgroundGradient(this, bkgrndGradient);
this.Title = "Hello in the actual About Page";
Label theLabel = new Label {
Text = "About Page : Hello Content Page"
};
// var theStack = new StackLayout()
// {
// //BackgroundColor = Color.Blue,
// Children =
// {
// new Label { Text = "About Page : Hello Content Page"}
// }
// };
//Content = theStack;
Content = theLabel;
//Content = new StackLayout
//{
// //BackgroundColor = Color.FromHex("555555"),
// Children = {
// new Label { Text = "Hello ContentPage" }
// }
//};
}
protected override void OnBindingContextChanged()
{
base.OnBindingContextChanged();
/*
* This is a bit of a hack. Android's renderer for TableView always adds an empty header for a
* TableSection declaration, while iOS doesn't. To compensate, I'm using a Label to display info text
* on iOS, and the TableSection on Android since there is no easy way to get rid of it.This is a
* long-standing bug in the XF TableView on Android.
* (https://forums.xamarin.com/discussion/18037/tablesection-w-out-header)
*/
TableSection section;
if (Device.RuntimePlatform == Device.Android)
{
section = new TableSection("Cell BackgroundGradient values set in C#:");
}
else
{
section = new TableSection();
}
section.Add(CreateBackgroundGradientCells());
var stack = new StackLayout();
if (Device.RuntimePlatform == Device.iOS)
{
stack.Children.Add(new Label {
Text = "Cell BackgroundGradient values set in C#:", Margin = new Thickness(10)
});
}
stack.Children.Add(new TableView
{
Intent = TableIntent.Data,
BackgroundColor = Color.Transparent,
VerticalOptions = LayoutOptions.Start,
HeightRequest = DeviceExtensions.OnPlatform <double>(176, 232, 0),
Root = new TableRoot
{
section
}
});
stack.Children.Add(new Label {
Text = "ContentPage BackgroundGradient value set in C#:", Margin = new Thickness(10)
});
Content = stack;
// Set the page's background gradient
ContentPageGloss.SetBackgroundGradient(this, new Gradient(Color.White, Color.FromRgb(128, 0, 0)));
}
/// <summary>
/// Dispose any created resources and prepare the instance for garbage collection
/// </summary>
/// <param name="disposing">If set to <c>true</c>, dispose any created resources</param>
protected override void Dispose(bool disposing)
{
if (disposing)
{
Gradient bkgrndGradient = ContentPageGloss.GetBackgroundGradient(Element);
if (bkgrndGradient != null)
{
bkgrndGradient.DetachRenderer(this);
}
}
base.Dispose(disposing);
}
public MainPage()
{
InitializeComponent();
var bkgrndGradient = new Gradient()
{
Rotation = 150,
Steps = new GradientStepCollection()
{
new GradientStep(Color.Orange, 0),
new GradientStep(Color.Yellow, .25),
new GradientStep(Color.Goldenrod, 0.5),
new GradientStep(Color.LightYellow, 1)
}
};
ContentPageGloss.SetBackgroundGradient(this, bkgrndGradient);
Data = new ObservableCollection <TemperatureData>();
}
public Charts()
{
InitializeComponent();
// Manually construct a multi-color gradient at an angle of our choosing
var bkgrndGradient = new Gradient()
{
Rotation = 150,
Steps = new GradientStepCollection()
{
new GradientStep(Color.LightBlue, 0),
new GradientStep(Color.SkyBlue, .25),
new GradientStep(Color.DeepSkyBlue, .5),
new GradientStep(Color.FromHex("#ccd9ff"), 1)
}
};
ContentPageGloss.SetBackgroundGradient(this, bkgrndGradient);
}
