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61 lines
2.8 KiB
Markdown
61 lines
2.8 KiB
Markdown
# Widget layout support
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Rooms can have a default widget layout to auto-pin certain widgets, make the container different
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sizes, etc. These are defined through the `io.element.widgets.layout` state event (empty state key).
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Full example content:
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```json5
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{
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"widgets": {
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"first-widget-id": {
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"container": "top",
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"index": 0,
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"width": 60,
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"height": 40
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},
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"second-widget-id": {
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"container": "right"
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}
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}
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}
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```
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As shown, there are two containers possible for widgets. These containers have different behaviour
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and interpret the other options differently.
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## `top` container
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This is the "App Drawer" or any pinned widgets in a room. This is by far the most versatile container
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though does introduce potential usability issues upon members of the room (widgets take up space and
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therefore fewer messages can be shown).
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The `index` for a widget determines which order the widgets show up in from left to right. Widgets
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without an `index` will show up as the rightmost widgets. Tiebreaks (same `index` or multiple defined
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without an `index`) are resolved by comparing widget IDs. A maximum of 3 widgets can be in the top
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container - any which exceed this will be ignored (placed into the `right` container). Smaller numbers
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represent leftmost widgets.
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The `width` is relative width within the container in percentage points. This will be clamped to a
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range of 0-100 (inclusive). The widgets will attempt to scale to relative proportions when more than
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100% space is allocated. For example, if 3 widgets are defined at 40% width each then the client will
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attempt to show them at 33% width each.
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Note that the client may impose minimum widths on the widgets, such as a 10% minimum to avoid pinning
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hidden widgets. In general, widgets defined in the 30-70% range each will be free of these restrictions.
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The `height` is not in fact applied per-widget but is recorded per-widget for potential future
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capabilities in future containers. The top container will take the tallest `height` and use that for
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the height of the whole container, and thus all widgets in that container. The `height` is relative
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to the container, like with `width`, meaning that 100% will consume as much space as the client is
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willing to sacrifice to the widget container. Like with `width`, the client may impose minimums to avoid
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the container being uselessly small. Heights in the 30-100% range are generally acceptable. The height
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is also clamped to be within 0-100, inclusive.
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## `right` container
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This is the default container and has no special configuration. Widgets which overflow from the top
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container will be put in this container instead. Putting a widget in the right container does not
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automatically show it - it only mentions that widgets should not be in another container.
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The behaviour of this container may change in the future.
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