protected override void OnElementChanged(ElementChangedEventArgs <GradientTextButton> e)
{
//base.OnElementChanged(e);
if (e.NewElement != null)
{
button = e.NewElement;
}
var linear = BackgroundExtension.CreateGradientBrush(button.StartColor.ToWindows(),
button.EndColor.ToWindows(),
button.CenterColor.ToWindows(),
button.Angle.ToWindows());
nButton = new Button
{
Content = button.Text,
Background = new SolidColorBrush(button.BackgroundColor.ToWindows()),
Foreground = linear,
BorderBrush = linear,
BorderThickness = new Thickness(button.BorderWidth),
Style = Application.Current.Resources["ButtonRevealStyle"] as Style
};
nButton.Click += (s, ev) => { button.SendClicked(); };
nButton.Holding += (s, ev) => { button.SendLongClick(); };
SetNativeControl(nButton);
}
private void NButton_Loaded(object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
nButton.Background = BackgroundExtension.CreateGradientBrush(button.StartColor.ToWindows(),
button.EndColor.ToWindows(),
button.CenterColor.ToWindows(),
button.Angle.ToWindows());
}
private Drawable CreateBackgroundButton()
{
var layer1 = BackgroundExtension.CreateBackgroundGradient(button.StartColor.ToAndroid(),
button.EndColor.ToAndroid(),
button.CenterColor.ToAndroid(), button.CornerRadius, button.Angle.ToAndroid());
var layer1Disabled = BackgroundExtension.CreateBackgroundGradient(Android.Graphics.Color.Gray,
Android.Graphics.Color.Gray,
Android.Graphics.Color.Gray, button.CornerRadius, button.Angle.ToAndroid());
var layer2Temp = BackgroundExtension.CreateBackgroundGradient(backgroundColor.ToAndroid(),
backgroundColor.ToAndroid(),
backgroundColor.ToAndroid(), button.CornerRadius, button.Angle.ToAndroid());
int borderWidth = (int)button.BorderWidth;
var layer2 = new InsetDrawable(layer2Temp, borderWidth, borderWidth, borderWidth, borderWidth);
Drawable[] drawables = new Drawable[] { layer1, layer2 };
Drawable[] drawablesDisabled = new Drawable[] { layer1Disabled, layer2 };
LayerDrawable layer = new LayerDrawable(drawables);
LayerDrawable layerDisabled = new LayerDrawable(drawablesDisabled);
var statesListDrawable = new StateListDrawable();
statesListDrawable.AddState(new int[] { -Android.Resource.Attribute.StateEnabled }, layerDisabled);
statesListDrawable.AddState(new int[] { Android.Resource.Attribute.StatePressed }, layer);
statesListDrawable.AddState(new int[] { Android.Resource.Attribute.StateEnabled }, layer);
return(statesListDrawable);
}
Brush CreateBackgroundUnToggle()
{
return(BackgroundExtension.CreateGradientBrush(button.StartColor.ToWindows(),
button.EndColor.ToWindows(),
button.CenterColor.ToWindows(),
button.Angle.ToWindows()));
}
private void Border_Loaded(object sender, RoutedEventArgs e)
{
border.Background = BackgroundExtension.CreateGradientBrush(frame.StartColor.ToWindows(),
frame.EndColor.ToWindows(),
frame.CenterColor.ToWindows(),
frame.Angle.ToWindows());
border.CornerRadius = frame.CornerRadius > 0 ? new CornerRadius(frame.CornerRadius) : new CornerRadius(0);
}
void CreateUnToggleBackground()
{
nButton.BackgroundColor = UIColor.Clear;
nButton.Layer.BorderColor = UIColor.Clear.CGColor;
nButton.Layer.BorderWidth = 0;
nButton.Layer.Sublayers = null;
nButton.Layer.InsertSublayer(BackgroundExtension.CreateBackgroundGradientLayer((float)button.Height, (float)button.Width, button.CornerRadius, button.StartColor.ToUIColor(),
button.EndColor.ToUIColor(), button.CenterColor.ToUIColor(), button.Angle.ToiOS()), 0);
}
private void NButton_Loaded(object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
nButton.Background = BackgroundExtension.CreateGradientBrush(button.StartColor.ToWindows(),
button.EndColor.ToWindows(),
button.CenterColor.ToWindows(),
button.Angle.ToWindows());
if (button.Image != null && !string.IsNullOrEmpty(button.Image.File))
{
RenderImage();
}
}
private Drawable CreateBackground()
{
var normalDrawable = BackgroundExtension.CreateBackgroundColor(entry.BackgroundColor.ToAndroid(), (float)entry.CornerRadius);
var focusDrawable = BackgroundExtension.CreateBackgroundColor(entry.FocusColor.ToAndroid(), (float)entry.CornerRadius);
var disabledDrawable = BackgroundExtension.CreateBackgroundColor(entry.DisabledColor.ToAndroid(), (float)entry.CornerRadius);
var statesListDrawable = new StateListDrawable();
statesListDrawable.AddState(new int[] { Android.Resource.Attribute.StateFocused }, focusDrawable);
statesListDrawable.AddState(new int[] { -Android.Resource.Attribute.StateEnabled }, disabledDrawable);
statesListDrawable.AddState(new int[] { -Android.Resource.Attribute.StateFirst }, normalDrawable);
return(new InsetDrawable(statesListDrawable, 0, 4, 0, 0));
}
private Shader CreateGradient()
{
if (button.IsEnabled)
{
return(BackgroundExtension.CreateLinearGradient(button.StartColor.ToAndroid(),
button.EndColor.ToAndroid(),
button.CenterColor.ToAndroid(), (float)button.Width, (float)button.Height));
}
return(BackgroundExtension.CreateLinearGradient(Android.Graphics.Color.Gray,
Android.Graphics.Color.Gray,
Android.Graphics.Color.Gray, (float)button.Width, (float)button.Height));
}
void CreateToggleBackground()
{
nButton.BackgroundColor = UIColor.Clear;
nButton.Layer.BorderColor = UIColor.Clear.CGColor;
nButton.Layer.BorderWidth = 0;
nButton.Layer.Sublayers = null;
nButton.Layer.InsertSublayer(BackgroundExtension.CreateBackgroundGradientLayer((float)button.Height, (float)button.Width, button.CornerRadius, button.ToggleStartColor.ToUIColor(),
button.ToggleEndColor.ToUIColor(), button.ToggleCenterColor.ToUIColor(), button.Angle.ToiOS()), 0);
if (button.Image != null && button.Image.File.Length > 0)
{
var background = BackgroundExtension.CreateBackgroundImage((float)button.Height, (float)button.Width, button.CornerRadius, button.Image.File);
nButton.Layer.InsertSublayer(background, 1);
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == "Width" || e.PropertyName == "Height")
{
Layer.BackgroundColor = UIColor.Clear.CGColor;
Layer.BorderColor = UIColor.Clear.CGColor;
Layer.BorderWidth = 0;
Layer.InsertSublayer(BackgroundExtension.CreateBackgroundGradientLayer((float)frame.Height, (float)frame.Width, frame.CornerRadius, frame.StartColor.ToUIColor(),
frame.EndColor.ToUIColor(), frame.CenterColor.ToUIColor(), frame.Angle.ToiOS()), 0);
if (frame.Image != null && frame.Image.File.Length > 0)
{
var background = BackgroundExtension.CreateBackgroundImage((float)frame.Height, (float)frame.Width, frame.CornerRadius, frame.Image.File);
Layer.InsertSublayer(background, 0);
}
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == nameof(button.Width) || e.PropertyName == nameof(button.Height))
{
nButton.BackgroundColor = UIColor.Clear;
nButton.Layer.BorderColor = UIColor.Clear.CGColor;
nButton.Layer.BorderWidth = 0;
nButton.Layer.InsertSublayer(BackgroundExtension.CreateBackgroundGradientLayer((float)button.Height, (float)button.Width, button.CornerRadius, button.StartColor.ToUIColor(),
button.EndColor.ToUIColor(), button.CenterColor.ToUIColor(), button.Angle.ToiOS()), 0);
if (button.Image != null && button.Image.File.Length > 0)
{
var background = BackgroundExtension.CreateBackgroundImage((float)button.Height, (float)button.Width, button.CornerRadius, button.Image.File);
nButton.Layer.InsertSublayer(background, 1);
}
}
}
private Drawable CreateBackgroundFrame()
{
List <Drawable> drawables = new List <Drawable>();
var layer1 = BackgroundExtension.CreateBackgroundGradient(grid.StartColor.ToAndroid(),
grid.EndColor.ToAndroid(),
grid.CenterColor.ToAndroid(), grid.CornerRadius, grid.Angle.ToAndroid());
drawables.Add(layer1);
if (grid.Image != null && !string.IsNullOrEmpty(grid.Image.File))
{
var bitmapDrawable = BackgroundExtension.CreateBackgroundBitmap(grid.Image.File, (int)grid.Height,
(int)grid.Width, grid.CornerRadius);
if (bitmapDrawable != null)
{
drawables.Add(bitmapDrawable);
}
}
return(new LayerDrawable(drawables.ToArray()));
}
Drawable CreateBackgroundForButton(bool renderImage = true)
{
List <Drawable> drawables = new List <Drawable>();
List <Drawable> drawablesDisabled = new List <Drawable>();
drawables.Add(BackgroundExtension.CreateBackgroundGradient(button.StartColor.ToAndroid(),
button.EndColor.ToAndroid(),
button.CenterColor.ToAndroid(),
button.CornerRadius,
button.Angle.ToAndroid()));
drawablesDisabled.Add(BackgroundExtension.CreateBackgroundGradient(button.StartColor.ToAndroid(),
button.EndColor.ToAndroid(),
button.CenterColor.ToAndroid(),
button.CornerRadius,
button.Angle.ToAndroid()));
if (button.Image != null && !string.IsNullOrEmpty(button.Image.File) && renderImage)
{
var bitmapDrawable = BackgroundExtension.CreateBackgroundBitmap(button.Image.File, (int)button.HeightRequest,
(int)button.WidthRequest, button.CornerRadius);
if (bitmapDrawable != null)
{
drawables.Add(bitmapDrawable);
drawablesDisabled.Add(bitmapDrawable);
}
}
Drawable layer = new LayerDrawable(drawables.ToArray());
Drawable layerDisabled = new LayerDrawable(drawablesDisabled.ToArray());
layerDisabled.Mutate().Alpha = 80;
var statesListDrawable = new StateListDrawable();
statesListDrawable.AddState(new int[] { -Android.Resource.Attribute.StateEnabled }, layerDisabled);
statesListDrawable.AddState(new int[] { Android.Resource.Attribute.StatePressed }, layer);
statesListDrawable.AddState(new int[] { Android.Resource.Attribute.StateEnabled }, layer);
return(statesListDrawable);
}
