freesewing/markdown/dev/reference/hooks/en.md

title
Lifecycle hooks

FreeSewing has lifecycle hooks that allow you extend its functionality by hooking into a lifecycle event.

You can register a method for a hook. When the hook is triggered, your method will be called. It will receive two parameters:

• An object relevant to the hook (see the specific hook for details)
• Data passed when the hook was registered (optional)

Pattern lifecycle

```dot rankdir="TB" compound=true subgraph cluster_pattern { fontsize=14 color="transparent" preInit [shape="box" color="tc-orange"] postInit [shape="box" color="tc-orange"]

subgraph cluster_draft { label="Pattern.draft()" color="tc-teal" preDraft [shape="box" color="tc-teal"] preSetDraft [shape="box" color="tc-teal"] prePartDraft [shape="box" color="tc-teal"] postPartDraft [shape="box" color="tc-teal"] postSetDraft [shape="box" color="tc-teal"] postDraft [shape="box" color="tc-teal"] }

subgraph cluster_sample { label="Pattern.sample()" color="tc-sky" preSample [shape="box" color="tc-sky"] postSample [shape="box" color="tc-sky"] }

subgraph cluster_getRenderProps { label="Pattern.getRenderProps()" color="tc-gray" preRenderProps [label="preRender" shape="box" color="tc-teal"] }

subgraph cluster_render { label="Pattern.render()" color="tc-gray" preRender [shape="box" color="tc-teal"] insertText [shape="box" color="tc-teal"] postRender [shape="box" color="tc-teal"] } }

preInit -> postInit postInit -> preDraft preDraft -> preSetDraft -> preSetDraft preSetDraft -> prePartDraft -> prePartDraft prePartDraft -> postPartDraft -> postPartDraft postPartDraft -> postSetDraft -> postSetDraft postSetDraft -> postDraft postDraft -> preRenderProps postDraft -> preRender preRender -> insertText -> insertText insertText -> postRender

postInit -> preSample preSample -> postSample postSample -> preRenderProps postSample -> preRender

</Dot>

## Lifecycle hooks

Below is a list of all available lifecycle hooks:

<ReadMore list />