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feat(module:select): support nzScrollToBottom event #678

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merged 1 commit into from
Dec 6, 2017
Merged

feat(module:select): support nzScrollToBottom event #678

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20 changes: 19 additions & 1 deletion src/components/select/nz-select.component.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -129,7 +129,7 @@ import { NzLocaleService } from '../locale/index';
<div
[ngClass]="_dropDownClassMap" [@dropDownAnimation]="_dropDownPosition">
<div style="overflow: auto;">
<ul class="ant-select-dropdown-menu ant-select-dropdown-menu-vertical ant-select-dropdown-menu-root" #dropdownUl>
<ul class="ant-select-dropdown-menu ant-select-dropdown-menu-vertical ant-select-dropdown-menu-root" #dropdownUl (scroll)="dropDownScroll(dropdownUl)">
<li
*ngFor="let option of _filterOptions"
[class.ant-select-dropdown-menu-item-disabled]="option.nzDisabled"
Expand Down Expand Up @@ -189,6 +189,7 @@ export class NzSelectComponent implements OnInit, AfterContentInit, AfterContent
@ViewChild('dropdownUl') dropdownUl: ElementRef;
@Output() nzSearchChange: EventEmitter<any> = new EventEmitter();
@Output() nzOpenChange: EventEmitter<any> = new EventEmitter();
@Output() nzScrollToBottom: EventEmitter<any> = new EventEmitter();
@Input() nzFilter = true;
@Input() nzMaxMultiple = Infinity;

Expand Down Expand Up @@ -319,6 +320,11 @@ export class NzSelectComponent implements OnInit, AfterContentInit, AfterContent
this._isOpen = value;
this.nzOpenChange.emit(this._isOpen);
this.setClassMap();
if (this._isOpen) {
setTimeout(() => {
this.checkDropDownScroll();
});
}
}

/** new nz-option insert or new tags insert */
Expand Down Expand Up @@ -722,6 +728,18 @@ export class NzSelectComponent implements OnInit, AfterContentInit, AfterContent
this.nzDisabled = isDisabled;
}

dropDownScroll(ul) {
if (ul && (ul.scrollHeight - ul.scrollTop === ul.clientHeight)) {
this.nzScrollToBottom.emit(true);
}
}

checkDropDownScroll() {
if (this.dropdownUl && (this.dropdownUl.nativeElement.scrollHeight === this.dropdownUl.nativeElement.clientHeight)) {
this.nzScrollToBottom.emit(true);
}
}

constructor(private _elementRef: ElementRef, private _renderer: Renderer2, private _locale: NzLocaleService) {
this._el = this._elementRef.nativeElement;
}
Expand Down
6 changes: 6 additions & 0 deletions src/showcase/nz-demo-select/nz-demo-select.html
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Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,12 @@ <h3 id="Select props"><span>nz-select</span>
<td>attribute</td>
<td>-</td>
</tr>
<tr>
<td>nzScrollToBottom</td>
<td>下拉菜单滚动到底部回调，可用于作为动态加载的触发条件</td>
<td>-</td>
<td>-</td>
</tr>
<tr>
<td>nzPlaceHolder</td>
<td>选择框默认文字</td>
Expand Down