TabFolder

Extends Composite

A widget that can switch between tabs. Only children of type Tab are supported. Since the TabFolder does not compute its own size, the width and height must be defined by the respective layout properties (e.g. either width or left and right must be specified).

Import this type with “const {TabFolder} = require('tabris');”

Android	iOS

Properties

paging

iOSAndroid

Type: boolean

Enables swiping through tabs. Always enabled on Windows.

selection

Type: Tab

The currently selected tab.

tabBarLocation

Type: string, supported values: top, bottom, hidden, auto, default: auto

The placement of the tab titles. When set to "hidden", the tab bar will not be visible. When set to "auto", the position is platform dependent.This property can only be set on widget creation. Once set, it cannot be changed anymore.

tabMode

Android

Type: string, supported values: fixed, scrollable, default: fixed

Controls how the tabs make use of the available horizontal space. Setting the tabMode to "fixed" makes the tabs span the entire available space. In case of a very wide TabFolder the "fixed" mode centers the tabs. The mode "scrollable" left aligns the tabs and allows to scroll the tabs if there are more tabs than would fit in the available space. Available on Android only.This property can only be set on widget creation. Once set, it cannot be changed anymore.

textColor

iOSAndroid

Type: Color

The color used for the text of the tab headers.

win_tabBarTheme

Type: string, supported values: light, dark, default, default: default

Controls the color scheme used for the tabBar. When set to "default" the theme is inherited from the TabFolder. Available only on Windows.

Events

pagingChanged

Fired when the paging property has changed.

Event Parameters

• target: this The widget the event was fired on.

• value: boolean The new value of paging.

scroll

iOSAndroid

Fired when paging is enabled and a tab is scrolled. The event parameter contains position information relative to the currently selected Tab. Eg.: scrolling a 500px wide tab 10% to the left sets offset to 50. Scrolling 10% to the right sets offset to -50.

Event Parameters

• target: this The widget the event was fired on.

• offset: number Number of pixels the current tab has scrolled horizontally.

• selection: Tab The current value of the selection property.

select

Fired when the selection property changes by user interaction.

Event Parameters

• target: this The widget the event was fired on.

• selection: Tab The new value of selection.

selectionChanged

Fired when the selection property has changed.

Event Parameters

• target: this The widget the event was fired on.

• value: Tab The new value of selection.

textColorChanged

Fired when the textColor property has changed.

Event Parameters

• target: this The widget the event was fired on.

• value: Color The new value of textColor.

win_tabBarThemeChanged

Fired when the win_tabBarTheme property has changed.

Event Parameters

• target: this The widget the event was fired on.

• value: string The new value of win_tabBarTheme.

Example

const {Tab, TabFolder, TextView, ui} = require('tabris');
// Create a swipe enabled tab folder with 3 tabs
let tabFolder = new TabFolder({
  left: 0, top: 0, right: 0, bottom: 0,
  paging: true // enables swiping. To still be able to open the developer console in iOS, swipe from the bottom right.
}).appendTo(ui.contentView);
createTab('Cart', 'images/cart.png', 'images/cart-filled.png');
createTab('Pay', 'images/card.png', 'images/card-filled.png');
createTab('Statistic', 'images/chart.png', 'images/chart-filled.png');
tabFolder.on('selectionChanged', ({value: tab}) => console.log(tab.title));
function createTab(title, image, seletedImage) {
  let tab = new Tab({
    title: title, // converted to upper-case on Android
    image: {src: image, scale: 2},
    selectedImage: {src: seletedImage, scale: 2}
  }).appendTo(tabFolder);
  new TextView({
    centerX: 0, centerY: 0,
    text: 'Content of Tab ' + title
  }).appendTo(tab);
}

See also

• Snippet with a TabFolder and Tabs

原文:

https://youjingyu.github.io/Tabris-Documention/?folderName=widgets&pageName=TabFolder.html