public static void UpdateBackground(Border border, Android.Views.View view)
{
var strokeThickness = border.StrokeThickness;
var context = view.Context;
// create stroke drawable
GradientDrawable strokeDrawable = null;
// if thickness exists, set stroke drawable stroke and radius
if(strokeThickness.HorizontalThickness + strokeThickness.VerticalThickness > 0) {
strokeDrawable = new GradientDrawable ();
strokeDrawable.SetColor (border.BackgroundColor.ToAndroid ());
// choose thickest margin
// the content is padded so it will look like the margin is with the given thickness
strokeDrawable.SetStroke ((int)context.ToPixels (strokeThickness.ThickestSide()), border.Stroke.ToAndroid ());
strokeDrawable.SetCornerRadius ((float)border.CornerRadius);
}
// create background drawable
var backgroundDrawable = new GradientDrawable ();
// set background drawable color based on Border's background color
backgroundDrawable.SetColor (border.BackgroundColor.ToAndroid ());
backgroundDrawable.SetCornerRadius((float)border.CornerRadius);
if (strokeDrawable != null) {
// if stroke drawable exists, create a layer drawable containing both stroke and background drawables
var ld = new LayerDrawable (new Drawable[] { strokeDrawable, backgroundDrawable });
ld.SetLayerInset (1, (int)context.ToPixels (strokeThickness.Left), (int)context.ToPixels (strokeThickness.Top), (int)context.ToPixels (strokeThickness.Right), (int)context.ToPixels (strokeThickness.Bottom));
view.SetBackgroundDrawable (ld);
} else {
view.SetBackgroundDrawable (backgroundDrawable);
}
// set Android.View's padding to take into account the stroke thickiness
view.SetPadding (
(int)context.ToPixels (strokeThickness.Left + border.Padding.Left),
(int)context.ToPixels (strokeThickness.Top + border.Padding.Top),
(int)context.ToPixels (strokeThickness.Right + border.Padding.Right),
(int)context.ToPixels (strokeThickness.Bottom + border.Padding.Bottom));
}
private void UpdateColors()
{
var button = Element as ShadowButton;
var normal = new Android.Graphics.Drawables.GradientDrawable ();
normal.SetColor (button.BackgroundColor.ToAndroid ());
normal.SetStroke ((int)button.BorderWidth, button.BorderColor.ToAndroid ());
normal.SetCornerRadius (button.BorderRadius);
var shadow = new Android.Graphics.Drawables.GradientDrawable ();
shadow.SetColor (button.ShadowColor.ToAndroid ());
shadow.SetStroke ((int)button.BorderWidth, button.ShadowColor.ToAndroid ());
shadow.SetCornerRadius (button.BorderRadius);
_normal = new Android.Graphics.Drawables.LayerDrawable (
new Drawable [] { shadow, normal }
);
var density = 3;
_normal.SetLayerInset (1, 0, 0, 0, 2 * density);
_pressed = new Android.Graphics.Drawables.GradientDrawable ();
var highlight = Context.ObtainStyledAttributes (new int [] {
Android.Resource.Attribute.ColorActivatedHighlight
}).GetColor(0, Android.Graphics.Color.Gray);
_pressed.SetColor (highlight);
_pressed.SetStroke ((int)button.BorderWidth, button.BorderColor.ToAndroid ());
_pressed.SetCornerRadius (button.BorderRadius);
var sld = new StateListDrawable ();
sld.AddState (new int[] { Android.Resource.Attribute.StatePressed }, _pressed);
sld.AddState (new int[] {}, _normal );
Control.SetPaddingRelative (0, 0, 2, 0);
Control.SetBackgroundDrawable (sld);
}
private Drawable CreateDrawable (int color)
{
var ovalShape = new OvalShape ();
var shapeDrawable = new ShapeDrawable (ovalShape);
shapeDrawable.Paint.Color = new Color (color);
if (hasShadow && !HasLollipopApi) {
var shadowDrawable = Resources.GetDrawable (size == FabSize.Normal ?
Resource.Drawable.fab_shadow :
Resource.Drawable.fab_shadow_mini);
var layerDrawable = new LayerDrawable (new Drawable[]{ shadowDrawable, shapeDrawable });
layerDrawable.SetLayerInset (1, shadowSize, shadowSize, shadowSize, shadowSize);
return layerDrawable;
} else {
return shapeDrawable;
}
}
public static void SetActionBarTheme(Activity context, FlatTheme theme, bool dark)
{
var color1 = theme.LightAccentColor;
var color2 = theme.BackgroundColor;
if (dark)
{
color1 = theme.BackgroundColor;
color2 = theme.DarkAccentColor;
}
var front = new PaintDrawable(color1);
var bottom = new PaintDrawable(color2);
var d = new Drawable[] { bottom, front};
var drawable = new LayerDrawable(d);
drawable.SetLayerInset(1, 0, 0, 0, 3);
var actionBar = context.ActionBar;
actionBar.SetBackgroundDrawable(drawable);
// invalidating action bar
actionBar.Title = actionBar.Title;
}