Makepad 2 0 Widgets

1. Read the relevant reference file(s) listed above
2. Incorporate reference content into the answer

Widget Categories Quick Reference

Containers (Layout)

Text Widgets

Buttons

Toggles

Input Widgets

Media

Layout Helpers

Lists

Navigation

Dock System

Critical Rules

1. height: Fit on Containers

// WRONG - View defaults to 0px height
View{ flow: Down Label{text: "Invisible"} }

// CORRECT
View{ height: Fit flow: Down Label{text: "Visible"} }

2. new_batch for Colored Containers with Text

// WRONG - text behind background
RoundedView{ draw_bg.color: #333 Label{text: "Invisible"} }

// CORRECT
RoundedView{ new_batch: true draw_bg.color: #333 Label{text: "Visible"} }

3. Named Children with :=

// Named (addressable, overridable)
title := Label{text: "Hello"}

// Static (not addressable)
Label{text: "Hello"}

4. Label Default Color is White

// Default text is white (#fff) - set color for light backgrounds
Label{text: "Dark text" draw_text.color: #333}

5. MapView MUST Have Fixed Height

// WRONG
MapView{ width: Fill height: Fill }

// CORRECT
View{ new_batch: true width: Fill height: 400
    MapView{ width: Fill height: 400 center_lat: 40.7 center_lon: -73.9 zoom: 14.0 }
}

6. Label Does NOT Support Animator

// WRONG (silently ignored)
Label{ animator: Animator{...} }

// CORRECT - wrap in View
View{ animator: Animator{...} Label{text: "Animated"} }

Common Widget Patterns

Card

RoundedView{
    width: Fill height: Fit
    padding: 16
    new_batch: true
    draw_bg.color: #2a2a3d
    draw_bg.border_radius: 8.0
    flow: Down spacing: 8
    title := Label{text: "Title" draw_text.color: #fff draw_text.text_style.font_size: 16}
    body := Label{text: "Content" draw_text.color: #aaa}
}

Form Input

View{
    width: Fill height: Fit
    flow: Down spacing: 4
    Label{text: "Email" draw_text.color: #aaa draw_text.text_style.font_size: 11}
    email_input := TextInput{
        width: Fill height: 36
        empty_text: "Enter email..."
    }
}

Scrollable List

ScrollYView{
    width: Fill height: Fill
    flow: Down spacing: 4
    new_batch: true
    on_render: || {
        for i, item in items {
            ItemTemplate{label.text: item.name}
        }
    }
}

Best Practices

1. Use height: Fit on every container unless you want Fill or fixed pixels
2. Use new_batch: true on any View with background color + text children
3. Use := for children you need to reference or override
4. Use theme colors (theme.color_*) instead of hardcoded colors
5. Use PortalList for large lists (virtualizes rendering)
6. Use ScrollYView for scrollable content areas
7. Use RoundedView for cards and containers (has border_radius)