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GridView

A scrollable, 2D array of controls.

info

GridView is very effective for large lists (thousands of items). Prefer it over wrapping Column or Row for smooth scrolling. See Flet Icons Browser for GridView usage example.

Examples​

Live example

import flet as ft

def main(page: ft.Page):
    page.title = "GridView Example"
    page.theme_mode = ft.ThemeMode.DARK
    page.padding = 50
    page.update()

    images = ft.GridView(
        expand=1,
        runs_count=5,
        max_extent=150,
        child_aspect_ratio=1.0,
        spacing=5,
        run_spacing=5,
    )

    page.add(images)

    for i in range(0, 60):
        images.controls.append(
            ft.Image(
                src=f"https://picsum.photos/150/150?{i}",
                fit=ft.ImageFit.NONE,
                repeat=ft.ImageRepeat.NO_REPEAT,
                border_radius=ft.border_radius.all(10),
            )
        )
    page.update()

ft.app(main, view=ft.AppView.WEB_BROWSER)

Properties​

auto_scroll​

True if scrollbar should automatically move its position to the end when children updated. Must be False for scroll_to() method to work.

cache_extent​

Items that fall in the cache area (area before or after the visible area that are about to become visible when the user scrolls) are laid out even though they are not (yet) visible on screen. The cacheExtent describes how many pixels the cache area extends before the leading edge and after the trailing edge of the viewport.

The total extent, which the viewport will try to cover with controls, is cache_extent before the leading edge + extent of the main axis + cache_extent after the trailing edge.

child_aspect_ratio​

The ratio of the cross-axis to the main-axis extent of each child.

clip_behavior​

The content will be clipped (or not) according to this option.

Value is of type ClipBehavior and defaults to ClipBehavior.HARD_EDGE.

controls​

A list of Controls to display inside GridView.

horizontal​

True to layout GridView items horizontally.

max_extent​

The maximum width or height of the grid item.

on_scroll_interval​

Throttling in milliseconds for on_scroll event.

Defaults to 10.

padding​

The amount of space by which to inset the children.

Padding is an instance of Padding.

reverse​

Defines whether the scroll view scrolls in the reading direction.

Defaults to False.

run_spacing​

The number of logical pixels between each child along the cross axis.

runs_count​

The number of children in the cross axis.

semantic_child_count​

The number of children that will contribute semantic information.

spacing​

The number of logical pixels between each child along the main axis.

Methods​

scroll_to(offset, delta, key, duration, curve)​

Moves scroll position to either absolute offset, relative delta or jump to the control with specified key.

See Column.scroll_to() for method details and examples.

Events​

on_scroll​

Fires when scroll position is changed by a user.

Event handler argument is an instance of OnScrollEvent class.