NativeScript - Widgets

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NativeScript provides a large set of user interface components and are called as ‘widgets’. Each widget does a special task and comes with a set of methods. Let’s understand NativeScript widgets in detail in this section.

Button

Button is a component to execute tap event action. When a user taps the button it performs the corresponding actions. It is defined below −

<Button text="Click here!" tap="onTap"></Button>

Let us add the button in our BlankNgApp as below −

Step 1

Open the src\app\home\home.component.html. This is the UI design page of our home component.

Step 2

Add a button inside the GirdLayout component. The complete code is as follows −

<ActionBar> 
   <Label text="Home"></Label> 
</ActionBar> 
<GridLayout> 
   <button text="Click Here!"></button> 
</GridLayout>

Output

Below is the output of the button −

GirdLayout

Step 3

We can style the button using CSS as specified below −

<ActionBar> 
   <Label text="Home"></Label> 
</ActionBar> 
<GridLayout> 
   <button text="Click Here!" class="-primary"></button> 
</GridLayout>

Here, −primary class is used to represent the primary button.

Output

Below is the output of ButtonPrimary −

ButtonPrimary

Step 4

NativeScript provides formatted option to provide custom icons in the button. The sample code is as follows −

<GridLayout> 
   <Button class="-primary"> 
      <FormattedString> 
         <Span text="&#xf099;" class="fa"></Span> 
         <Span text=" Button.-primary with icon"></Span> 
      </FormattedString> 
   </Button> 
</GridLayout>
.fa {
   font-family: "FontAwesome", "fontawesome-webfont";
}

Here,

&#xf099 specifies the location of the icon in the font, FontAwesome. Download the latest Font Awesome font and place the fontawesome-webfont.ttf in src\fonts folder.

Output

Below is the output of ButtonPrimary −

FontAwesome

Step 5

Rounded button can be created using the below syntax −

<Button text="Button.-primary.-rounded-sm" class="-primary -rounded-sm"></Button>

Output

Below is the output of ButtonPrimary −

Home

Label

Label component is used to display static text. Change the home page as below −

<GridLayout> 
   <Label text="NativeScript is an open source framework for creating native iOS and Android apps in TypeScript or JavaScript." textWrap="true">
   </Label> 
</GridLayout>

Here, textWrap wraps the content of the label, if the label extends beyond the screen width.

Output

Below is the output of Label −

Label

TextField

TextField component is used to get information from user. Let us change our home page as specified below −

<GridLayout> 
   <TextField hint="Username" 
      color="lightblue" 
      backgroundColor="lightyellow" 
      height="75px">
   </TextField> 
</GridLayout>

Here,

  • color represent text color

  • backgroundColor represent background of the text box

  • height represent the height of the text box

Output

Below is the output of Text Field −

Text Field

TextView

TextView Component is used to get multi-line text content from the user. Let us change our home page as specified below −

<GridLayout> 
   <TextView loaded="onTextViewLoaded" hint="Enter text" returnKeyType="done" autocorrect="false" maxLength="100"> 
   </TextView> 
</GridLayout>

Here, maxLength represent maximum length accepted by TextView.

Output

Below is the output of TextView −

TextView

SearchBar

This component is used for search any queries or submit any request. It is defined below −

<StackLayout> 
   <SearchBar id="bar" hint="click here to search ..."></SearchBar> 
<StackLayout>
SearchBar

We can apply styles −

<StackLayout> 
   <SearchBar id="bar" hint="click here to search ..." color="green" backgroundColor="green"></SearchBar> 
</StackLayout>

Below is the output of SearchBarStyle −

SearchBarstyle

Switch

Switch is based on toggle to choose between options. Default state is false. It is defined below −

<StackLayout> 
   <Switch checked="false" loaded="onSwitchLoaded"></Switch> 
</StackLayout>

The output for the above program is shown below −

Program

Slider

Slider is a sliding component to pick a numeric range. It is defined below −

<Slider value="30" minValue="0" maxValue="50" loaded="onSliderLoaded"></Slider>

The output for the above program is given below −

Slider

Progress

Progress widget indicates progress in an operation. Current progress is represented as bar. It is defined below −

<StackLayout verticalAlign="center" height="50"> 
   <Progress value="90" maxValue="100" backgroundColor="red" color="green" row="0"></Progress>
</StackLayout>

Below is the output of Progress widget −

Progress

ActivityIndicator

ActivityIndicator shows a task in a progress. It is defined below −

<StackLayout verticalAlign="center" height="50"> 
   <ActivityIndicator busy="true" color="red" width="50" 
   height="50"></ActivityIndicator> 
</StackLayout>

Below is the output for ActivityIndicator −

ActivityIndicator

Image

Image widget is used to display an image. It can be loaded using ‘ImageSource’ url. It is defined below −

<StackLayout class="m-15" backgroundColor="lightgray">
   <Image src="~/images/logo.png" stretch="aspectFill"></Image> 
</StackLayout>

The output for Image Widget is as shown below −

Image

WebView

WebView shows web pages. Web pages can be loaded using URL. It is defined below −

<WebView row="1" loaded="onWebViewLoaded" id="myWebView" src="http://www.google.com"></WebView>

The output for the above code is as shown below −

WebView

DatePicker

DatePicker component is used to pick date. It is defined below −

<StackLayout class="m-15" backgroundColor="lightgray"> 
   <DatePicker year="1980" month="4" day="20" verticalAlignment="center"></DatePicker> 
</StackLayout>

The output of DatePicker component is as shown below −

DatePicker

TimePicker

TimePicker component is used to pick the time. It is defined below −

<StackLayout class="m-15" backgroundColor="lightgray"> 
<TimePicker hour="9" 
   minute="25" 
   maxHour="23" 
   maxMinute="59" 
   minuteInterval="5"> 
</TimePicker> 
</StackLayout>

Below is the output of TimePicker component −

TimePicker
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