Skip to main content

UWP - How to use Slider

UWP Slider
The Slider class represents a control that lets the UWP app users select from a range of values by moving a Thumb control along a track. The RangeBase class’s ValueChanged event occurs when the range value changes. The UWP developers can use this event to respond to the Slider value changes.

The RangeBase class’s Maximum property gets or sets the highest possible value of the range element such as Slider control. This property value type is Doublewhich is the highest possible value of the range element. The default value of this property is 1.

The RangeBase class’s Minimum property gets or sets the minimum possible value of the range element. This property value type is also Double which is the minimum possible value of the range element. The default value of the Minimum property is 0.

The Slider class’s TickFrequency property gets or sets the increment of the value range that ticks should be created for. This property value type is Double which is the increment to create tick marks for. The default value of the TickFrequency property is 0.0.

The following UWP app development tutorial code will demonstrate how we can use a Slider control in our app and how we can handle the ValueChanged event to respond to the Slider value changes. Here we also demonstrate how to set the minimum and maximum value for the Slider control and how to define the tick position.
MainPage.xaml

<Page
    x:Class="UniversalAppTutorials.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:UniversalAppTutorials"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">
    <StackPanel 
        x:Name="stack_panel1" 
        Margin="50" 
        Orientation="Vertical"
        Background="PaleVioletRed"
        Padding="35"
        >
        <TextBlock
            x:Name="text_block1"
            Text="Darg the slider thumb to change this text size."
            TextWrapping="Wrap"
            />
        <Slider
            x:Name="slider1"
            Maximum="45"
            Minimum="25"
            TickFrequency="5"
            TickPlacement="BottomRight"
            ValueChanged="Slider1_ValueChanged"
            Orientation="Horizontal"
            />
    </StackPanel>
</Page>
MainPage.xaml.cs

using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;

namespace UniversalAppTutorials
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private void Slider1_ValueChanged(object sender, RangeBaseValueChangedEventArgs e) {
            // Get the slider instance
            Slider slider = sender as Slider;

            if (slider != null) {
                // Set the text block text size as slider value
                text_block1.FontSize = slider.Value;
            }
        }
    }
}
Labels:

Popular posts from this blog

Restricting Jetpack Compose TextField to Numeric Input Only

Jetpack Compose has revolutionized Android development with its declarative approach, enabling developers to build modern, responsive UIs more efficiently. Among the many components provided by Compose, TextField is a critical building block for user input. However, ensuring that a TextField accepts only numeric input can pose challenges, especially when considering edge cases like empty fields, invalid characters, or localization nuances. In this blog post, we'll explore how to restrict a Jetpack Compose TextField to numeric input only, discussing both basic and advanced implementations. Why Restricting Input Matters Restricting user input to numeric values is a common requirement in apps dealing with forms, payment entries, age verifications, or any data where only numbers are valid. Properly validating input at the UI level enhances user experience, reduces backend validation overhead, and minimizes errors during data processing. Compose provides the flexibility to implement ...
Read more

jetpack compose - TextField remove underline

Compose TextField Remove Underline The TextField is the text input widget of android jetpack compose library. TextField is an equivalent widget of the android view system’s EditText widget. TextField is used to enter and modify text. The following jetpack compose tutorial will demonstrate to us how we can remove (actually hide) the underline from a TextField widget in an android application. We have to apply a simple trick to remove (hide) the underline from the TextField. The TextField constructor’s ‘colors’ argument allows us to set or change colors for TextField’s various components such as text color, cursor color, label color, error color, background color, focused and unfocused indicator color, etc. Jetpack developers can pass a TextFieldDefaults.textFieldColors() function with arguments value for the TextField ‘colors’ argument. There are many arguments for this ‘TextFieldDefaults.textFieldColors()’function such as textColor, disabledTextColor, backgroundColor, cursorC...
Read more

jetpack compose - Image clickable

Compose Image Clickable The Image widget allows android developers to display an image object to the app user interface using the jetpack compose library. Android app developers can show image objects to the Image widget from various sources such as painter resources, vector resources, bitmap, etc. Image is a very essential component of the jetpack compose library. Android app developers can change many properties of an Image widget by its modifiers such as size, shape, etc. We also can specify the Image object scaling algorithm, content description, etc. But how can we set a click event to an Image widget in a jetpack compose application? There is no built-in property/parameter/argument to set up an onClick event directly to the Image widget. This android application development tutorial will demonstrate to us how we can add a click event to the Image widget and make it clickable. Click event of a widget allow app users to execute a task such as showing a toast message by cli...
Read more