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Base Widget

The following details apply to all types of Widgets.

• Widget Basics
  • What is a Widget?
  • Base Widget
  • Attributes
    • Basic attributes
    • Widget-specific attributes
    • Parents and children
  • Working Mechanisms
    • Parent-child structure
    • Moving together
    • Visibility only on the parent
    • Create and delete Widgets
  • Screens
    • What are Screens?
    • Creating Screens
    • Active Screen
    • Loading Screens
    • Layers
    • Transparent Screens
  • Parts
  • States
  • Flags
  • Base-Widget Events
    • Events from Input Devices
    • Special Events
    • Drawing Events
    • Other Events
  • Keys
  • Snapshot
  • Example
    • Base objects with custom styles
    • Make an object draggable
    • Transform object using a 3x3 matrix
  • API
• Positions, Sizes and Layouts
  • Overview
  • Units
  • Boxing Model
  • Important Notes
    • Postponed coordinate calculation
    • Removing styles
  • Positioning Widgets
    • Direct
    • Alignment
  • Size
    • Sizing the simple way
    • Extending the click area
  • Using styles
  • Translation
  • Transformation
    • Min and Max size
  • Layout
    • Layout overview
    • Built-in layouts
    • Flags
    • Adding new layouts
  • Examples
  • API
• Layers
  • Order of Creation
    • Changing Order
  • Draw Layers
    • Simple Layer
    • Transformed Layer
    • Clip corner
  • API
• Styles
  • Style Details
    • States
    • Cascading Styles
    • Inheritance
    • Parts
    • Initialize Styles and Set/Get Properties
    • Add and remove styles to a widget
    • Local Styles
    • Style Properties Overview
    • Transitions
    • Opacity, Blend Modes and Transformations
    • Color Filter
    • Themes
    • Examples
    • API
  • Style Properties
    • Size and position
    • Padding
    • Margin
    • Background
    • Border
    • Outline
    • Shadow
    • Image
    • Line
    • Arc
    • Text
    • Miscellaneous
    • Flex
    • Grid
• Events
  • Adding Events to a Widget
  • Removing Event(s) from Widgets
  • Event Codes
    • Input Device Events
    • Drawing Events
    • Special Events
    • Other Events
    • Display Events
    • Custom Events
    • Refresh Event
  • Sending Events Manually
  • Fields of lv_event_t
  • Event Bubbling
  • Examples
    • Button click event
    • Click streaks
    • Handle multiple events
    • Event bubbling
    • Draw event
  • API
• Layouts
  • Flex
    • Overview
    • Terms
    • Simple Interface
    • Style Interface
    • Other Features
    • Examples
    • API
  • Grid
    • Overview
    • Terms
    • Simple Interface
    • Style Interface
    • Other features
    • Example
    • API
• Scrolling
  • Overview
    • Scrollbar
    • Scrolling Events
  • Features of Scrolling
    • Scrollable
    • Scroll chaining
    • Scroll momentum
    • Elastic scroll
    • Snapping
    • Scroll one
    • Scroll on focus
  • Scrolling Programmatically
  • Self Size
  • Examples
    • Nested scrolling
    • Snapping
    • Floating button
    • Styling the scrollbars
    • Right to left scrolling
    • Translate on scroll
  • API