"shadow" property of View

The "shadow" property allows you to set shadows for the View. There may be several shadows.The shadow is described using the ViewShadow interface extending the Properties interface (see above).The shadow has the following properties:

Property	Constant	Type	Description
"color"	ColorTag	Color	Shadow color
"inset"	Inset	bool	true - the shadow inside the View, false - outside
"x-offset"	XOffset	SizeUnit	Offset the shadow along the X axis
"y-offset"	YOffset	SizeUnit	Offset the shadow along the Y axis
"blur"	BlurRadius	float	Shadow blur radius. The value must be >= 0
"spread-radius"	SpreadRadius	float	Increase the shadow. Value > 0 increases shadow, < 0 decreases shadow

Three functions are used to create a ViewShadow:

func NewViewShadow(offsetX, offsetY, blurRadius, spread-radius SizeUnit, color Color) ViewShadow
func NewInsetViewShadow(offsetX, offsetY, blurRadius, spread-radius SizeUnit, color Color) ViewShadow
func NewShadowWithParams(params Params) ViewShadow

The NewViewShadow function creates an outer shadow (Inset == false),NewInsetViewShadow - an inner one (Inset == true).The NewShadowWithParams function is used when constants must be used as parameters.For example:

shadow := NewShadowWithParams(rui.Params{
	rui.ColorTag  : "@shadowColor",
	rui.BlurRadius: 8.0,
	rui.Dilation  : 16.0,
})

ViewShadow, ViewShadow array, and ViewShadow textual representation can be assigned as a value to the "shadow" property.

The ViewShadow text representation has the following format:

_{ color =  [, x-offset = ] [, y-offset = ] [, blur = ]
	[, spread-radius = ] [, inset = ] }

You can get the value of "shadow" property using the function

func GetViewShadows(view View, subviewID ...string) []ViewShadow

If no shadow is specified, then this function will return an empty array