Called immediately before mounting occurs, and before Component#render.
Avoid introducing any side-effects or subscriptions in this method.
This method will not stop working in React 17.
Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.
Called when the component may be receiving new props. React may call this even if props have not changed, so be sure to compare new and existing props if you only want to handle changes.
Calling Component#setState generally does not trigger this method.
This method will not stop working in React 17.
Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.
Called immediately before rendering when new props or state is received. Not called for the initial render.
Note: You cannot call Component#setState here.
This method will not stop working in React 17.
Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.
Callback to add a new master layout. Shows a dialogue prompting the user to choose a name for the layout. If the name is empty or the user cancels the prompt, no new layout is created.
Catches exceptions generated in descendant components. Unhandled exceptions will cause the entire component tree to unmount.
Invoked after the component is first mounted. Sets the currentScreen
prop if it is not set already.
Called immediately after updating occurs. Not called for the initial render.
The snapshot is only present if getSnapshotBeforeUpdate is present and returns non-null.
Called immediately before mounting occurs, and before Component#render.
Avoid introducing any side-effects or subscriptions in this method.
Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.
Called when the component may be receiving new props. React may call this even if props have not changed, so be sure to compare new and existing props if you only want to handle changes.
Calling Component#setState generally does not trigger this method.
Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.
Called immediately before a component is destroyed. Perform any necessary cleanup in this method, such as
cancelled network requests, or cleaning up any DOM elements created in componentDidMount.
Called immediately before rendering when new props or state is received. Not called for the initial render.
Note: You cannot call Component#setState here.
Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.
This function returns a list of components which have been placed onto the
given screen for the given layout. If the given layout does not exist or
does not have any components assigned to it, undefined is returned.
ID of screen for which we want to get the components
ID of layout for which we want to get the components
A list of components placed onto the given screen for the given layout
Runs before React applies the result of render to the document, and
returns an object to be given to componentDidUpdate. Useful for saving
things such as scroll position before render causes changes to it.
Note: the presence of getSnapshotBeforeUpdate prevents any of the deprecated lifecycle events from running.
Renders the component.
Renders the preview screen and sets it up so that the user can place elements on it via drag and drop. Also renders a dropdown where the user can update the current screen.
JSX elements which render the preview screen and a dropdown for selecting the screen
Called to determine whether the change in props and state should trigger a re-render.
Component always returns true.
PureComponent implements a shallow comparison on props and state and returns true if any
props or states have changed.
If false is returned, Component#render, componentWillUpdate
and componentDidUpdate will not be called.
Callback which is invoked in response to the user selecting a new preview screen.
Form event from which the screen ID is retrieved
Generated using TypeDoc
MasterManager is a Redux-connected component responsible for rendering preview screens, which can be used for dropping components on top of and thus assigning them to master layouts. It also provides elements for * creating and updating such master layouts. It receives all its props via the Redux state tree.