Is there a way to change the OverlayContainer?
I have created a tooltip component, but sometimes I want to attach the overlay to a specific element (by default the overlay is attached to the document body).
Here is how I am creating the overlay:
private initOverlay(): void {
const positionStrategy = this.overlayPositionBuilder
.flexibleConnectedTo(this.elementRef)
.withPositions([this.resolvedConfig]);
this.overlayRef = this.overlay.create({positionStrategy});
}
And this is how I am attaching a template to it:
show(): void {
this.overlayRef.attach(new TemplatePortal(this.tpl, this.viewContainerRef));
}
Please reference this stackblitz example.
looks like you can accomplish this by extending the
OverlayContainer
class via the following inapp.module.ts
{ provide: OverlayContainer, useFactory: () => new AppOverlayContainer() }
Stackblitz
https://stackblitz.com/edit/angular-material2-issue-ansnt5?file=app%2Fapp.module.ts
This GitHub comment also provides an example of how to package this in a directive
GitHub comment
https://github.com/angular/material2/issues/7349#issuecomment-337513040
Revision 3/22/19 working directive example
Extend the OverlayContainer
class via cdk-overlay-container.ts
Stub the class in app.module.ts
providers: [
{ provide: OverlayContainer, useClass: CdkOverlayContainer },
]
In your cdk-overlay-container.ts
you are preventing the default _createContainer()
from working, and providing your own custom public method myCreateContainer
to replace it.
You are essentially creating an empty
div
here, adding a custom class to itmy-custom-overlay-container-class
and appending it to thediv
the directive is attached to, then passing that container to the private variable_containerElement
in the trueOverlayContainer
class.
/**
* Create overlay container and append to ElementRef from directive
*/
public myCreateContainer(element: HTMLElement): void {
let container = document.createElement('div');
container.classList.add('my-custom-overlay-container-class');
element.appendChild(container);
this._containerElement = container;
}
/**
* Prevent creation of the HTML element, use custom method above
*/
protected _createContainer(): void {
return;
}
Then in your cdk-overlay-container.directive.ts
your are calling myCreateContainer()
and passing the ElementRef
as an argument.
this.cdkOverlayContainer['myCreateContainer'](this.elementReference.nativeElement);
Then in your HTML assign the directive where you want it to show up.
<div myCdkOverlayContainer
Stackblitz
https://stackblitz.com/edit/angular-material2-issue-6nzwws?embed=1&file=app/app.component.html
来源:https://stackoverflow.com/questions/55288559/angular-cdk-overlay-change-default-overlay-container