Created
March 5, 2019 09:47
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| /** | |
| * Sets the appropriate positions on a position strategy | |
| * so the overlay connects with the trigger correctly. | |
| * @param positionStrategy Strategy whose position to update. | |
| */ | |
| private setPosition(positionStrategy: FlexibleConnectedPositionStrategy) { | |
| let positions: ConnectedPosition[]; | |
| if (this.triggersSubmenu()) { | |
| // When the menu is a sub-menu, it should always align itself | |
| // to the edges of the trigger, instead of overlapping it. | |
| positions = convertMenuPositionToConnectedPositions(['right', 'top'], -MENU_PANEL_TOP_PADDING); | |
| } else { | |
| positions = convertMenuPositionToConnectedPositions(this.menu.position); | |
| } | |
| positionStrategy.withPositions(positions); | |
| } |
Hi, this looks great, can you tell us how to use this? The trigger directive doesn't look like a regular angular directive, it's not clear how we should be getting the reference to the FlexibleConnectedPositionStrategy?
@chriszrc I don't know if you still need the answer, but below is the way I used it if other people need it:
@ViewChildren(MatMenuTrigger)
menuTriggers: QueryList<MatMenuTrigger>;
constructor(
private ngZone: NgZone
) { }
ngAfterViewInit(): void {
this.menuTriggers.forEach(item => {
item.menuOpened.pipe(
// delay(1000)
).subscribe(() => {
this.menuOpened = item;
this.ngZone.onStable.pipe(first()).subscribe(() => {
this.recalculateMenu(item)
})
});
});
}
recalculateMenu(menuTrigger: MatMenuTrigger) {
const overlayRef: OverlayRef = (menuTrigger as any)._overlayRef;
const overlayConfig = overlayRef.getConfig();
(overlayConfig.positionStrategy as any)._isInitialRender = true;
this.setPosition(menuTrigger, overlayConfig.positionStrategy as FlexibleConnectedPositionStrategy);
overlayConfig.positionStrategy.apply();
}
setPosition(menuTrigger: MatMenuTrigger, positionStrategy: FlexibleConnectedPositionStrategy) {
let positions: ConnectedPosition[];
if (menuTrigger.triggersSubmenu()) {
// When the menu is a sub-menu, it should always align itself
// to the edges of the trigger, instead of overlapping it.
positions = convertMenuPositionToConnectedPositions(["right", "top"], -8);
} else {
positions = convertMenuPositionToConnectedPositions(["right", "top"]);
}
positionStrategy.withPositions(positions);
}
what is this.menuOpened?
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RTL is no requirement for me, so the code doesn't take that into account.