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feat(material/tabs): add API to update the pagination #23288

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Merged
merged 1 commit into from
Jan 15, 2022
Merged

feat(material/tabs): add API to update the pagination #23288

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16 changes: 15 additions & 1 deletion src/material/tabs/tab-group.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +67,8 @@ const _MatTabGroupMixinBase = mixinColor(mixinDisableRipple(class {
}), 'primary');

interface MatTabGroupBaseHeader {
_alignInkBarToSelectedTab: () => void;
_alignInkBarToSelectedTab(): void;
updatePagination(): void;
focusIndex: number;
}

Expand Down Expand Up @@ -306,6 +307,19 @@ export abstract class _MatTabGroupBase extends _MatTabGroupMixinBase implements
}
}

/**
* Recalculates the tab group's pagination dimensions.
*
* WARNING: Calling this method can be very costly in terms of performance. It should be called
* as infrequently as possible from outside of the Tabs component as it causes a reflow of the
* page.
*/
updatePagination() {
if (this._tabHeader) {
this._tabHeader.updatePagination();
}
}

/**
* Sets focus to a particular tab.
* @param index Index of the tab to be focused.
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1 change: 1 addition & 0 deletions tools/public_api_guard/material/tabs.md
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Expand Up @@ -269,6 +269,7 @@ export abstract class _MatTabGroupBase extends _MatTabGroupMixinBase implements
// (undocumented)
abstract _tabHeader: MatTabGroupBaseHeader;
_tabs: QueryList<MatTab>;
updatePagination(): void;
// (undocumented)
static ɵdir: i0.ɵɵDirectiveDeclaration<_MatTabGroupBase, never, never, { "dynamicHeight": "dynamicHeight"; "selectedIndex": "selectedIndex"; "headerPosition": "headerPosition"; "animationDuration": "animationDuration"; "contentTabIndex": "contentTabIndex"; "disablePagination": "disablePagination"; "backgroundColor": "backgroundColor"; }, { "selectedIndexChange": "selectedIndexChange"; "focusChange": "focusChange"; "animationDone": "animationDone"; "selectedTabChange": "selectedTabChange"; }, never>;
// (undocumented)
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