06

    Layout System Deep Dive

    Beginner • 18 min • Video Lesson

    Complete tasks and quiz to finish this lesson

    Video Player Placeholder (l1D1Y_I_5Y8)

    Learning Objectives

    • Differentiate between Row and Column for linear grid positioning
    • Master alignment properties: MainAxisAlignment and CrossAxisAlignment
    • Solve flex constraints overflow errors using Expanded and Flexible widgets
    • Understand how constraints flow down and sizes bubble up through parent nodes

    What You'll Learn

    1. Linear flex layouts: Row and Column widgets mechanics
    2. Aligning and spacing items across primary and secondary axes
    3. Expanded vs Flexible: managing remaining screen real estate
    4. Diagnosing yellow-and-black rendering overflow warnings

    Key Concepts

    Row
    Column
    Expanded
    Flexible
    Alignment
    Layout Constraints

    Key Takeaways

    • Constraints go down, sizes go up, parent sets position.
    • Row main axis runs horizontally; Column main axis runs vertically.
    • Expanded enforces constraints on children to fill remaining space, preventing render overflow errors.

    Build Steps

    Knowledge Check

    Which widget stretches a child to fill remaining spaces inside linear containers?

    What is the primary alignment axis for a Row widget?

    What core layout rule describes sizes and positions in Flutter rendering?

    Next Lesson

    07 — Styling and Theming →