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Merge pull request #2497 from NativeScript/nnikolov/TabViewDocs2

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Added documentation for selectedIndexChanged event.
This commit is contained in:
Nedyalko Nikolov
2016-07-22 16:41:34 +03:00
committed by GitHub
parent 1907fd984a c991cd7ed0
commit 6997f14891
2 changed files with 16 additions and 0 deletions
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2
tests/app/ui/tab-view/tab-view-tests.ts
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@ -231,10 +231,12 @@ export class TabViewTest extends testModule.UITest<tabViewModule.TabView> {
return tabView.selectedIndex === expectedOldIndex;
}, helper.ASYNC);
// >> article-tabview-selectedIndexChanged
tabView.on(tabViewModule.TabView.selectedIndexChangedEvent, (args: tabViewModule.SelectedIndexChangedEventData) => {
actualOldIndex = args.oldIndex;
actualNewIndex = args.newIndex;
});
// << article-tabview-selectedIndexChanged
tabViewTestsNative.selectNativeTab(tabView, expectedNewIndex);
TKUnit.waitUntilReady(function () {

14
tests/app/ui/tab-view/tab-view.md
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@ -33,3 +33,17 @@ Using a TabView requires the "ui/tab-view" module.
{%snippet article-select-tab%}
## Creating a TabView
{%snippet article-create-tabview%}
### Using selectedIndexChanged changed event
{%snippet article-tabview-selectedIndexChanged%}
### Using selectedIndexChanged event from xml
```XML
<Page>
<TabView selectedIndexChanged="onSelectedIndexChanged">
...
</TabView>
</Page>
```
```TypeScript
export function onSelectedIndexChanged(args) {...}
```
> Note: Initially selectedIndexChanged event will be raised just after adding a new items to TabView without any user interaction, which will happen on TabView loaded. SelectedIndexChanged event will be raised because value of the selectedIndex property is changed from undefined (default) (with no items) to 0 (first tab item). Depends on how TabView.items are set or added it may happen to raise one or two times selectedIndexChanged event even before page events (loaded, navigatingTo, navigatedTo, ...).