A family of shadow-layered wrapper views that apply CALayer drop shadow to a white (or custom) inner panel. The outer view controls the shadow; the inner panel provides the visible surface. Ideal for card-style UI elements.

Class	Inner Content	Use Case
TTBaseShadowPanelView	TTBaseUIView panelShadowView	Generic card container — add subviews to panelShadowView
TTBaseShadowButtonView	TTBaseUIButton	Floating call-to-action button with depth shadow
TTBaseShadowContentView<T>	Generic T: UIView	Shadow wrapper for any UIView subtype
TTBaseShadowPaddingPanelView	Panel with UIEdgeInsets	Card with controllable padding inside shadow

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🚀 Usage

TTBaseShadowPanelView — Card

class ProductCardView: TTBaseShadowPanelView {
    let imageView = TTBaseUIImageView(withCornerRadius: 8)
    let titleLabel = TTBaseUILabel(withType: .TITLE, text: "", align: .left)
    let priceLabel = TTBaseUILabel(withType: .SUB_TITLE, text: "", align: .right)

    override func updateBaseUIView() {
        super.updateBaseUIView()
        // Add content to panelShadowView (the white card surface)
        panelShadowView.addSubview(imageView)
        panelShadowView.addSubview(titleLabel)
        panelShadowView.addSubview(priceLabel)
        // ... layout constraints
    }

    // Customize shadow
    override var bgShadown: UIColor { .black.withAlphaComponent(0.15) }
    override var bgPanel: UIColor { .white }
}

TTBaseShadowButtonView — CTA Button

let ctaButton = TTBaseUIButton(textString: "Add to Cart", type: .DEFAULT)
let shadowBtn = TTBaseShadowButtonView(with: ctaButton, shadownHeight: 6)

// Handle tap
shadowBtn.onTouchButtonHandler = {
    addToCart()
}

// Subclass for custom shadow
class MyFloatingButton: TTBaseShadowButtonView {
    override var bgShadown: UIColor { .systemBlue.withAlphaComponent(0.3) }
    override func updateBaseShadowButtonView() {
        // Additional setup
    }
}

TTBaseShadowContentView — Generic Wrapper

// Wrap any UIView in a shadow container
class ShadowCardVC: TTBaseShadowContentView<MyCustomView> {
    override func updateBaseUIView() {
        super.updateBaseUIView()
        // panelView is of type MyCustomView
        panelView.configure(data: cardData)
    }
    override var bgShadown: UIColor { .systemGray.withAlphaComponent(0.2) }
}

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📖 Overridable Properties

Property	Default	Description
bgShadown	darkGray, 40%	Shadow color (CALayer.shadowColor)
shadowHeight	P_CONS_DEF	Shadow Y offset + inner panel bottom spacing
bgPanel	.white	Inner panel background color (set in setupStyles)
textColor	TTView.textDefColor	Default text color for inner content
shadowPadding	UIEdgeInsets	Padding panel insets (TTBaseShadowPaddingPanelView)