Protected ReadonlyaiReadonlynodeGet the DOM node owned by the widget.
ProtectednodeReadonlyonProtected ReadonlyonReadonlyonProtected ReadonlyonReadonlyonProtected ReadonlyonReadonlyonProtected ReadonlyonProtected OptionalpendingProtectedpendingFrames a pending highlight has already waited for its target row; see applyScrollAndHighlight.
Protected ReadonlypreferenceProtected ReadonlyregistryProtectedresetProtectedscopeScope every row on the page reads from and writes to; per-scope editing is not wired up yet.
Protected OptionalscrollProtected OptionalscrollProtected ReadonlyselectionProtected ReadonlytoProtected ReadonlytoStatic ReadonlyHIGHLIGHT_Frames a pending search highlight waits for its target row to be mounted before it is dropped.
Static ReadonlyIDThe dataset for the widget's DOM node.
A signal emitted when the widget is disposed.
Get the method for hiding the widget.
Get the id of the widget's DOM node.
Set the id of the widget's DOM node.
Test whether the widget's node is attached to the DOM.
Test whether the widget has been disposed.
Test whether the widget is visible.
A widget is visible when it is attached to the DOM, is not explicitly hidden, and has no explicitly hidden ancestors.
Since 2.7.0, this does not rely on the Widget.Flag.IsVisible flag. It recursively checks the visibility of all parent widgets.
Get the parent of the widget.
Set the parent of the widget.
Children are typically added to a widget by using a layout, which means user code will not normally set the parent widget directly.
The widget will be automatically removed from its old parent.
This is a no-op if there is no effective parent change.
The title object for the widget.
The title object is used by some container widgets when displaying the widget alongside some title, such as a tab panel or side bar.
Since not all widgets will use the title, it is created on demand.
The owner property of the title is set to this widget.
ProtectedaddProtectedaddOptionaluseCapture: booleanProtectedaddProtectedaddProtectedapplyProtectedcenterVertically centers element within body by scrolling that container and nothing else.
Deliberately not Element.scrollIntoView: that scrolls every scrollable ancestor to satisfy the
requested alignment, and overflow: hidden does not prevent programmatic scrolling. When a row cannot
be centered inside the body alone, it therefore nudges the overflow: hidden containers above this
widget, which have no scrollbar for the user to scroll back — shifting the whole shell, pushing the menu
bar out of view and leaving a gap below the status bar.
Create an iterator over the widget's children.
A new iterator over the children of the widget.
The widget must have a populated layout in order to have children.
If a layout is not installed, the returned iterator will be empty.
Clear the given widget flag.
This will not typically be called directly by user code.
Since 2.7.0, Widget.Flag.IsVisible is deprecated. It will be removed in a future version.
Test whether a widget is a descendant of this widget.
The descendant widget of interest.
true if the widget is a descendant, false otherwise.
ProtectedcreateProtecteddisableProtectedgetProtectedhandleTest whether the widget's DOM node has the given class name.
The class name of interest.
true if the node has the class, false otherwise.
Hide the widget and make it hidden to its parent widget.
This causes the isHidden property to be true.
If the widget is explicitly hidden, this is a no-op.
ProtectedinitProtectednotifyProtectedonA message handler invoked on an 'activate-request' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on an 'after-attach' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on an 'after-detach' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on an 'after-hide' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on an 'after-show' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on a 'before-attach' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on a 'before-detach' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on a 'before-hide' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on a 'before-show' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on a 'child-added' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on a 'child-removed' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on a 'close-request' message.
The default implementation unparents or detaches the widget.
ProtectedonA message handler invoked on a 'fit-request' message.
The default implementation of this handler is a no-op.
ProtectedonA message handler invoked on a 'resize' message.
The default implementation of this handler is a no-op.
ProtectedonProtectedonA message handler invoked on an 'update-request' message.
The default implementation of this handler is a no-op.
ProtectedrenderRender the React widget in the DOM.
ProtectedrenderProtectedrenderShared in-pane header for a category-level page: the category icon, name and optional description.
ProtectedrenderProtectedrenderProtectedrenderProtectedselectSelects the category whose item just disappeared. Deferred to a microtask: this runs during render, and selecting synchronously would re-enter the widget's update while React is still committing this one.
Set the given widget flag.
This will not typically be called directly by user code.
Since 2.7.0, Widget.Flag.IsVisible is deprecated. It will be removed in a future version.
Show the widget and make it visible to its parent widget.
This causes the isHidden property to be false.
If the widget is not explicitly hidden, this is a no-op.
Test whether the given widget flag is set.
This will not typically be called directly by user code.
Since 2.7.0, Widget.Flag.IsVisible is deprecated. It will be removed in a future version.
Toggle a class name on the widget's DOM node.
The class name to toggle on the node.
Optionalforce: booleanWhether to force add the class (true) or force
remove the class (false). If not provided, the presence of
the class will be toggled from its current state.
true if the class is now present, false otherwise.
The class name must not contain whitespace.
The base class of the lumino widget hierarchy.
Notes
This class will typically be subclassed in order to create a useful widget. However, it can be used directly to host externally created content.