[C#/WINUI3/UWP/.NET6] RadialGradientBrush 엘리먼트 사용하기

■ RadialGradientBrush 엘리먼트를 사용하는 방법을 보여준다.

▶ MainPage.xaml


<?xml version="1.0" encoding="utf-8"?>
<Page x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:media="using:Microsoft.UI.Xaml.Media"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid Margin="10">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"    />
            <ColumnDefinition Width="10"   />
            <ColumnDefinition Width="Auto" />
        </Grid.ColumnDefinitions>
        <Rectangle x:Name="Rect" Grid.Column="0"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Width="200"
            Height="200">
            <Rectangle.Fill>
                <media:RadialGradientBrush x:Name="radialGradientBrush"
                    MappingMode="RelativeToBoundingBox"
                    Center="0.25 0.25"
                    RadiusX="0.5"
                    RadiusY="0.5"
                    GradientOrigin="0.5 0.25"
                    SpreadMethod="Pad">
                    <GradientStop Offset="0.0" Color="Yellow" />
                    <GradientStop Offset="1"   Color="Blue"   />
                </media:RadialGradientBrush>
            </Rectangle.Fill>
        </Rectangle>
        <Grid Grid.Column="2"
            HorizontalAlignment="Center"
            VerticalAlignment="Center">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="Auto" />
            </Grid.ColumnDefinitions>
            <ComboBox Name="mappingModeComboBox" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2"
                Header="MappingMode"
                SelectedValue="RelativeToBoundingBox">
                <x:String>RelativeToBoundingBox</x:String>
                <x:String>Absolute</x:String>
            </ComboBox>
            <Slider Name="centerXSlider" Grid.Row="1" Grid.Column="0"
                Margin="0 10 0 0"
                Header="Center.X"
                SmallChange="0.05" />
            <Slider Name="centerYSlider" Grid.Row="1" Grid.Column="1"
                Margin="10 10 0 0"
                Header="Center.Y"
                SmallChange="0.05" />
            <Slider Name="radiusXSlider" Grid.Row="2" Grid.Column="0"
                Margin="0 10 0 0"
                Header="RadiusX"
                SmallChange="0.05" />
            <Slider Name="radiusYSlider" Grid.Row="2" Grid.Column="1"
                Margin="10 10 0 0"
                Header="RadiusY"
                SmallChange="0.05" />
            <Slider Name="originXSlider" Grid.Row="3" Grid.Column="0"
                Margin="0 10 0 0"
                Header="GradientOrigin.X"
                SmallChange="0.05" />
            <Slider Name="originYSlider" Grid.Row="3" Grid.Column="1"
                Margin="10 10 0 0"
                Header="GradientOrigin.Y"
                SmallChange="0.05" />
            <ComboBox Name="spreadMethodComboBox" Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="2"
                Margin="0 10 0 0"
                Header="SpreadMethod"
                SelectedValue="Pad">
                <x:String>Pad</x:String>
                <x:String>Reflect</x:String>
                <x:String>Repeat</x:String>
            </ComboBox>
        </Grid>
    </Grid>
</Page>

<?xml version="1.0" encoding="utf-8"?>

<Page x:Class="TestProject.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:media="using:Microsoft.UI.Xaml.Media"

Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"

FontFamily="나눔고딕코딩"

FontSize="16">

<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

<Rectangle x:Name="Rect" Grid.Column="0"

HorizontalAlignment="Center"

VerticalAlignment="Center"

Width="200"

Height="200">

<Rectangle.Fill>

<media:RadialGradientBrush x:Name="radialGradientBrush"

MappingMode="RelativeToBoundingBox"

Center="0.25 0.25"

RadiusX="0.5"

RadiusY="0.5"

GradientOrigin="0.5 0.25"

SpreadMethod="Pad">

</media:RadialGradientBrush>

</Rectangle.Fill>

</Rectangle>

<Grid Grid.Column="2"

HorizontalAlignment="Center"

VerticalAlignment="Center">

<Grid.RowDefinitions>

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

<ComboBox Name="mappingModeComboBox" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2"

Header="MappingMode"

SelectedValue="RelativeToBoundingBox">

<x:String>RelativeToBoundingBox</x:String>

<x:String>Absolute</x:String>

</ComboBox>

<Slider Name="centerXSlider" Grid.Row="1" Grid.Column="0"

Margin="0 10 0 0"

Header="Center.X"

SmallChange="0.05" />

<Slider Name="centerYSlider" Grid.Row="1" Grid.Column="1"

Margin="10 10 0 0"

Header="Center.Y"

SmallChange="0.05" />

<Slider Name="radiusXSlider" Grid.Row="2" Grid.Column="0"

Margin="0 10 0 0"

Header="RadiusX"

SmallChange="0.05" />

<Slider Name="radiusYSlider" Grid.Row="2" Grid.Column="1"

Margin="10 10 0 0"

Header="RadiusY"

SmallChange="0.05" />

<Slider Name="originXSlider" Grid.Row="3" Grid.Column="0"

Margin="0 10 0 0"

Header="GradientOrigin.X"

SmallChange="0.05" />

<Slider Name="originYSlider" Grid.Row="3" Grid.Column="1"

Margin="10 10 0 0"

Header="GradientOrigin.Y"

SmallChange="0.05" />

<ComboBox Name="spreadMethodComboBox" Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="2"

Margin="0 10 0 0"

Header="SpreadMethod"

SelectedValue="Pad">

<x:String>Pad</x:String>

<x:String>Reflect</x:String>

<x:String>Repeat</x:String>

</ComboBox>

</Grid>

</Page>

▶ MainPage.xaml.cs


using System;
using System.Numerics;

using Windows.Foundation;

using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Controls.Primitives;
using Microsoft.UI.Xaml.Media;

namespace TestProject
{
    /// <summary>
    /// 메인 페이지
    /// </summary>
    public sealed partial class MainPage : Page
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainPage()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainPage()
        {
            InitializeComponent();

            this.mappingModeComboBox.SelectionChanged  += mappingModeComboBox_SelectionChanged;
            this.centerXSlider.ValueChanged            += slider_ValueChanged;
            this.centerYSlider.ValueChanged            += slider_ValueChanged;
            this.radiusXSlider.ValueChanged            += slider_ValueChanged;
            this.radiusYSlider.ValueChanged            += slider_ValueChanged;
            this.originXSlider.ValueChanged            += slider_ValueChanged;
            this.originYSlider.ValueChanged            += slider_ValueChanged;
            this.spreadMethodComboBox.SelectionChanged += spreadMethodComboBox_SelectionChanged;

            InitializeSliders();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region MappingMode 콤보 박스 선택 변경시 처리하기 - mappingModeComboBox_SelectionChanged(sender, e)

        /// <summary>
        /// MappingMode 콤보 박스 선택 변경시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void mappingModeComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            this.radialGradientBrush.MappingMode = Enum.Parse<BrushMappingMode>(this.mappingModeComboBox.SelectedValue.ToString());

            InitializeSliders();
        }

        #endregion
        #region 슬라이더 값 변경시 처리하기 - slider_ValueChanged(sender, e)

        /// <summary>
        /// 슬라이더 값 변경시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void slider_ValueChanged(object sender, RangeBaseValueChangedEventArgs e)
        {
            this.radialGradientBrush.Center         = new Point(this.centerXSlider.Value, this.centerYSlider.Value);
            this.radialGradientBrush.RadiusX        = this.radiusXSlider.Value;
            this.radialGradientBrush.RadiusY        = this.radiusYSlider.Value;
            this.radialGradientBrush.GradientOrigin = new Point(this.originXSlider.Value, this.originYSlider.Value);
        }

        #endregion
        #region SpreadMode 콤보 박스 선택 변경시 처리하기 - spreadMethodComboBox_SelectionChanged(sender, e)

        /// <summary>
        /// SpreadMode 콤보 박스 선택 변경시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void spreadMethodComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            this.radialGradientBrush.SpreadMethod = Enum.Parse<GradientSpreadMethod>(this.spreadMethodComboBox.SelectedValue.ToString());
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 슬라이더 초기화하기 - InitializeSliders()

        /// <summary>
        /// 슬라이더 초기화하기
        /// </summary>
        private void InitializeSliders()
        {
            Size rectSize = Rect.ActualSize.ToSize();

            if(this.radialGradientBrush.MappingMode == BrushMappingMode.Absolute)
            {
                this.centerXSlider.Maximum = this.radiusXSlider.Maximum = this.originXSlider.Maximum = rectSize.Width;
                this.centerYSlider.Maximum = this.radiusYSlider.Maximum = this.originYSlider.Maximum = rectSize.Width;

                this.centerXSlider.Value = this.radiusXSlider.Value = this.originXSlider.Value = rectSize.Width / 2;
                this.centerYSlider.Value = this.radiusYSlider.Value = this.originYSlider.Value = rectSize.Width / 2;

                this.centerXSlider.StepFrequency = this.radiusXSlider.StepFrequency = this.originXSlider.StepFrequency = rectSize.Width  / 50;
                this.centerYSlider.StepFrequency = this.radiusYSlider.StepFrequency = this.originYSlider.StepFrequency = rectSize.Height / 50;

                this.centerXSlider.SmallChange = this.radiusXSlider.SmallChange = this.originXSlider.SmallChange = 10;
                this.centerYSlider.SmallChange = this.radiusYSlider.SmallChange = this.originYSlider.SmallChange = 10;
            }
            else
            {
                this.centerXSlider.Maximum = this.radiusXSlider.Maximum = this.originXSlider.Maximum = 1.0;
                this.centerYSlider.Maximum = this.radiusYSlider.Maximum = this.originYSlider.Maximum = 1.0;

                this.centerXSlider.Value = this.radiusXSlider.Value = this.originXSlider.Value = 0.5;
                this.centerYSlider.Value = this.radiusYSlider.Value = this.originYSlider.Value = 0.5;

                this.centerXSlider.StepFrequency = this.radiusXSlider.StepFrequency = this.originXSlider.StepFrequency = 0.02;
                this.centerYSlider.StepFrequency = this.radiusYSlider.StepFrequency = this.originYSlider.StepFrequency = 0.02;

                this.centerXSlider.SmallChange = this.radiusXSlider.SmallChange = this.originXSlider.SmallChange = 0.05;
                this.centerYSlider.SmallChange = this.radiusYSlider.SmallChange = this.originYSlider.SmallChange = 0.05;
            }
        }

        #endregion
    }
}

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using System;

using System.Numerics;

using Windows.Foundation;

using Microsoft.UI.Xaml.Controls;

using Microsoft.UI.Xaml.Controls.Primitives;

using Microsoft.UI.Xaml.Media;

namespace TestProject

{

/// <summary>

/// 메인 페이지

/// </summary>

public sealed partial class MainPage : Page

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainPage()

/// <summary>

/// 생성자

/// </summary>

public MainPage()

{

InitializeComponent();

this.mappingModeComboBox.SelectionChanged += mappingModeComboBox_SelectionChanged;

this.centerXSlider.ValueChanged += slider_ValueChanged;

this.centerYSlider.ValueChanged += slider_ValueChanged;

this.radiusXSlider.ValueChanged += slider_ValueChanged;

this.radiusYSlider.ValueChanged += slider_ValueChanged;

this.originXSlider.ValueChanged += slider_ValueChanged;

this.originYSlider.ValueChanged += slider_ValueChanged;

this.spreadMethodComboBox.SelectionChanged += spreadMethodComboBox_SelectionChanged;

InitializeSliders();

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region MappingMode 콤보 박스 선택 변경시 처리하기 - mappingModeComboBox_SelectionChanged(sender, e)

/// <summary>

/// MappingMode 콤보 박스 선택 변경시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void mappingModeComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)

{

this.radialGradientBrush.MappingMode = Enum.Parse<BrushMappingMode>(this.mappingModeComboBox.SelectedValue.ToString());

InitializeSliders();

}

#endregion

#region 슬라이더 값 변경시 처리하기 - slider_ValueChanged(sender, e)

/// <summary>

/// 슬라이더 값 변경시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void slider_ValueChanged(object sender, RangeBaseValueChangedEventArgs e)

{

this.radialGradientBrush.Center = new Point(this.centerXSlider.Value, this.centerYSlider.Value);

this.radialGradientBrush.RadiusX = this.radiusXSlider.Value;

this.radialGradientBrush.RadiusY = this.radiusYSlider.Value;

this.radialGradientBrush.GradientOrigin = new Point(this.originXSlider.Value, this.originYSlider.Value);

}

#endregion

#region SpreadMode 콤보 박스 선택 변경시 처리하기 - spreadMethodComboBox_SelectionChanged(sender, e)

/// <summary>

/// SpreadMode 콤보 박스 선택 변경시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void spreadMethodComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)

{

this.radialGradientBrush.SpreadMethod = Enum.Parse<GradientSpreadMethod>(this.spreadMethodComboBox.SelectedValue.ToString());

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 슬라이더 초기화하기 - InitializeSliders()

/// <summary>

/// 슬라이더 초기화하기

/// </summary>

private void InitializeSliders()

{

Size rectSize = Rect.ActualSize.ToSize();

if(this.radialGradientBrush.MappingMode == BrushMappingMode.Absolute)

{

this.centerXSlider.Maximum = this.radiusXSlider.Maximum = this.originXSlider.Maximum = rectSize.Width;

this.centerYSlider.Maximum = this.radiusYSlider.Maximum = this.originYSlider.Maximum = rectSize.Width;

this.centerXSlider.Value = this.radiusXSlider.Value = this.originXSlider.Value = rectSize.Width / 2;

this.centerYSlider.Value = this.radiusYSlider.Value = this.originYSlider.Value = rectSize.Width / 2;

this.centerXSlider.StepFrequency = this.radiusXSlider.StepFrequency = this.originXSlider.StepFrequency = rectSize.Width / 50;

this.centerYSlider.StepFrequency = this.radiusYSlider.StepFrequency = this.originYSlider.StepFrequency = rectSize.Height / 50;

this.centerXSlider.SmallChange = this.radiusXSlider.SmallChange = this.originXSlider.SmallChange = 10;

this.centerYSlider.SmallChange = this.radiusYSlider.SmallChange = this.originYSlider.SmallChange = 10;

}

else

{

this.centerXSlider.Maximum = this.radiusXSlider.Maximum = this.originXSlider.Maximum = 1.0;

this.centerYSlider.Maximum = this.radiusYSlider.Maximum = this.originYSlider.Maximum = 1.0;

this.centerXSlider.Value = this.radiusXSlider.Value = this.originXSlider.Value = 0.5;

this.centerYSlider.Value = this.radiusYSlider.Value = this.originYSlider.Value = 0.5;

this.centerXSlider.StepFrequency = this.radiusXSlider.StepFrequency = this.originXSlider.StepFrequency = 0.02;

this.centerYSlider.StepFrequency = this.radiusYSlider.StepFrequency = this.originYSlider.StepFrequency = 0.02;

this.centerXSlider.SmallChange = this.radiusXSlider.SmallChange = this.originXSlider.SmallChange = 0.05;

this.centerYSlider.SmallChange = this.radiusYSlider.SmallChange = this.originYSlider.SmallChange = 0.05;

}

#endregion

}

TestProject.zip

.NET6 2D BRUSH C# GRAPHICS UWP WINUI3

icodebroker

[C#/WINUI3/UWP/.NET6] RadialGradientBrush 엘리먼트 사용하기