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Follows the behavior of a dropdown. */\nlet defaultPositionList = [\n new ConnectionPositionPair(\n {originX: 'start', originY: 'bottom'},\n {overlayX: 'start', overlayY: 'top'}),\n new ConnectionPositionPair(\n {originX: 'start', originY: 'top'},\n {overlayX: 'start', overlayY: 'bottom'}),\n];\n\n\n/**\n * Directive applied to an element to make it usable as an origin for an Overlay using a\n * ConnectedPositionStrategy.\n */\n@Directive({\n selector: '[overlay-origin]',\n exportAs: 'overlayOrigin',\n})\nexport class OverlayOrigin {\n constructor(private _elementRef: ElementRef) { }\n\n get elementRef() {\n return this._elementRef;\n }\n}\n\n\n\n/**\n * Directive to facilitate declarative creation of an Overlay using a ConnectedPositionStrategy.\n */\n@Directive({\n selector: '[connected-overlay]'\n})\nexport class ConnectedOverlayDirective implements OnInit, OnDestroy {\n private _overlayRef: OverlayRef;\n private _templatePortal: TemplatePortal;\n\n @Input() origin: OverlayOrigin;\n @Input() positions: ConnectionPositionPair[];\n\n // TODO(jelbourn): inputs for size, scroll behavior, animation, etc.\n\n constructor(\n private _overlay: Overlay,\n templateRef: TemplateRef<any>,\n viewContainerRef: ViewContainerRef) {\n this._templatePortal = new TemplatePortal(templateRef, viewContainerRef);\n }\n\n get overlayRef() {\n return this._overlayRef;\n }\n\n /** TODO: internal */\n ngOnInit() {\n this._createOverlay();\n }\n\n /** TODO: internal */\n ngOnDestroy() {\n this._destroyOverlay();\n }\n\n /** Creates an overlay and attaches this directive's template to it. */\n private _createOverlay() {\n if (!this.positions || !this.positions.length) {\n this.positions = defaultPositionList;\n }\n\n let overlayConfig = new OverlayState();\n overlayConfig.positionStrategy =\n this._overlay.position().connectedTo(\n this.origin.elementRef,\n {originX: this.positions[0].overlayX, originY: this.positions[0].originY},\n {overlayX: this.positions[0].overlayX, overlayY: this.positions[0].overlayY});\n\n this._overlayRef = this._overlay.create(overlayConfig);\n this._overlayRef.attach(this._templatePortal);\n }\n\n /** Destroys the overlay created by this directive. */\n private _destroyOverlay() {\n this._overlayRef.dispose();\n }\n}\n\n\n@NgModule({\n imports: [PortalModule],\n exports: [ConnectedOverlayDirective, OverlayOrigin],\n declarations: [ConnectedOverlayDirective, OverlayOrigin],\n})\nexport class OverlayModule {\n static forRoot(): ModuleWithProviders {\n return {\n ngModule: OverlayModule,\n providers: OVERLAY_PROVIDERS,\n };\n }\n}\n"],"sourceRoot":"/source/"} |