Changing style of overlay container

Question

I use a git project for a virtual keyboard (https://ngx-material-keyboard.github.io/demo/). And I have some issues to get it running on a small device with 450*250 pixel.

At the end I found the necessary changes in the css if I modify it directly at the web browser with dev tools.

Now I have to find the right position to change the sources.

There will be used the overlay component from angular2-material to visualize the keyboard.

If I comment out the position in the cdk-overlay-container, it works:

.cdk-overlay-container {
/* position: fixed; */
z-index: 1000;

}

But I cant overwrite these from my angular application. Any suggestions?

Screenshot of changes

Solution 1

UPDATED ANSWER

From the official documentation:

Styling overlay components

Overlay-based components have a panelClass property (or similar) that can be used to target the overlay pane.

You can override the default dialog container styles by adding a css class in your global styles.css. For example:

.custom-dialog-container .mat-dialog-container {
    /* add your styles */
}

After that, you'll need to providies you css class as a panelClass parameter to your dialog:

this.dialog.open(MyDialogComponent, { panelClass: 'custom-dialog-container' })

Read this official documentation for more information.

---

ORIGINAL ANSWER

Use ::ng-deep in your component.css to override the default styles.

::ng-deep .cdk-overlay-container {
    /* Do you changes here */
    position: fixed; 
    z-index: 1000;
}

Solution 2

If you want to change the styling of mat-dialogue-container adding a panel class and giving style is enough, but in case if you want to change the styling of cdk-overlay-container then adding a backdropClass will help

const dialogRef = this.dialog.open(PopupComponent, {
  backdropClass: 'popupBackdropClass',
  panelClass: 'custom-dialog-container',
  data: { data: data }
});

in css add

.popupBackdropClass {
   background-color:yellow
 }

Solution 3

To be able to override the Material CSS classes from your component styles, you will need to set the View Encapsulation to None on your component:

@Component({
    templateUrl: './my.component.html' ,
    styleUrls: ['./my.component.scss'], //or .css, depending what you use
    encapsulation: ViewEncapsulation.None,
})

Solution 4

Overriding cdk-overlay-containeris not good since it is gonna affect all other components. You can create custom OverlayContainer. See example.

View more solutions

Comments

[Mark]

It's worth noting that ::ng-deep is deprecated - but I can't find clarification on timeframes or alternatives

[Mar]

::ng-deep doesn't stay in isolated scope, it will effect other views too

[Awais]

What if i need to set z-index of .cdk-overlay-container for mat-menu and mat-dialog separately. as i have fixed header on my site

[aruno]

For this case ::ng-deep effectively does the same as to put the css code in the global styles. You're better off putting it in global styles - because it isn't scoped to your component. In fact it's worse than that - lets say you put background: blue - and opened a dialog from another component. It wouldn't be blue right. But then you open this component and it's blue - great! Then go back and open the first one again and it will still be blue. This belongs in global styles.css or scss.