UWP - How to set app window minimum size

UWP - Set app window minimum size

The following Universal Windows Platform application development tutorial demonstrates how we can set the app window minimum size programmatically. Here we will get the current application view. Then we will set the minimum size for this app window using the ApplicationView class SetPreferredMinSize() method.

The ApplicationView class represents the active application view and associated states and behaviors. The ApplicationView class GetForCurrentView() method gets the view state and behavior settings of the active application. This method returns an ApplicationView instance that can be used to get and set app display properties.

The ApplicationView class SetPreferredMinSize(Size) method sets the smallest size, in effective pixels, allowed for the app window. The SetPreferredMinSize(Size minSize) method has a parameter named minSize. The minSize parameter value is a Size that is the smallest size allowed for the app window, or a Size whose height and width are both zero to use the system's default minimum size.

The UWP developers can remove the preferred minimum size and use and system's default minimum size instead by setting the Size value to "0,0".

The smallest allowed app window minimum size is 192 x 48 effective pixels. The largest allowed window minimum size is 500 x 500 effective pixels.

When the UWP app developers set the preferred minimum size, it affects only the view it was requested on, and setting it on one view does not impact the preferred minimum size of the other views. The preferred minimum size is not persisted after the app is closed.

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 Background="DarkBlue" Padding="50">
        <TextBlock
            x:Name="TextBlock1"
            FontFamily="MV Boli"
            FontSize="25"
            Foreground="Snow"
            TextWrapping="Wrap"
            />
    </StackPanel>
</Page>

MainPage.xaml.cs

using Windows.UI.Xaml.Controls;
using Windows.UI.ViewManagement;
using Windows.Foundation;


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

            /*
                ApplicationView
                    Represents the active application view and
                    associated states and behaviors.

                GetForCurrentView
                    Gets the view state and behavior settings of the active application.
            */

            /*
                ApplicationView.SetPreferredMinSize
                    Sets the smallest size, in effective pixels,
                    allowed for the app window.

                    To remove the preferred minimum size and use and system default
                    minimum size instead, set the Size value to "0,0".

                    The smallest allowed minimum size is 192 x 48 effective pixels.
                    The largest allowed minimum size is 500 x 500 effective pixels.
                    If you set a value outside of these bounds, it is coerced
                    to be within the allowed bounds. 
            */

            // Set the application minimum window size
            ApplicationView.GetForCurrentView().SetPreferredMinSize(
                new Size(
                    450, // Width
                    250 // Height
                    )
                );

            // Display the app window minimum size on text block
            TextBlock1.Text = "Application window minimum size is,"
                +" Width 450 Pixels & Height 250 Pixels.";
        }
    }
}