Steven Kirk
8 years ago
committed by
GitHub
GitHub
9 changed files with 332 additions and 54 deletions
@ -0,0 +1,65 @@ |
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<UserControl xmlns="https://github.com/avaloniaui" |
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> |
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<UserControl.Resources> |
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<StreamGeometry x:Key="Acorn"> |
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F1 M 16.6309,18.6563C 17.1309, |
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8.15625 29.8809,14.1563 29.8809, |
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14.1563C 30.8809,11.1563 34.1308, |
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11.4063 34.1308,11.4063C 33.5,12 |
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34.6309,13.1563 34.6309,13.1563C |
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32.1309,13.1562 31.1309,14.9062 |
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31.1309,14.9062C 41.1309,23.9062 |
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32.6309,27.9063 32.6309,27.9062C |
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24.6309,24.9063 21.1309,22.1562 |
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16.6309,18.6563 Z M 16.6309,19.9063C |
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21.6309,24.1563 25.1309,26.1562 |
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31.6309,28.6562C 31.6309,28.6562 |
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26.3809,39.1562 18.3809,36.1563C |
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18.3809,36.1563 18,38 16.3809,36.9063C |
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15,36 16.3809,34.9063 16.3809,34.9063C |
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16.3809,34.9063 10.1309,30.9062 16.6309,19.9063 Z |
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</StreamGeometry> |
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</UserControl.Resources> |
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|
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<Grid RowDefinitions="Auto,*"> |
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<StackPanel Orientation="Vertical" Spacing="4"> |
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<TextBlock Classes="h1">Viewbox</TextBlock> |
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<TextBlock Classes="h2">A control used to scale single child.</TextBlock> |
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</StackPanel> |
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<Grid ColumnDefinitions="Auto,*,*" |
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RowDefinitions="*,*,*,*" |
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Grid.Row="1" Margin="48" |
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MaxWidth="400"> |
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<TextBlock Grid.Row="0" VerticalAlignment="Center">None</TextBlock> |
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<TextBlock Grid.Row="1" VerticalAlignment="Center">Fill</TextBlock> |
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<TextBlock Grid.Row="2" VerticalAlignment="Center">Uniform</TextBlock> |
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<TextBlock Grid.Row="3" VerticalAlignment="Center">UniformToFill</TextBlock> |
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|
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<Viewbox Grid.Row="0" Grid.Column="1" Stretch="None"> |
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<TextBlock>Hello World!</TextBlock> |
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</Viewbox> |
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<Viewbox Grid.Row="1" Grid.Column="1" Stretch="Fill"> |
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<TextBlock>Hello World!</TextBlock> |
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</Viewbox> |
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<Viewbox Grid.Row="2" Grid.Column="1" Stretch="Uniform"> |
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<TextBlock>Hello World!</TextBlock> |
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</Viewbox> |
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<Viewbox Grid.Row="3" Grid.Column="1" Stretch="UniformToFill"> |
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<TextBlock>Hello World!</TextBlock> |
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</Viewbox> |
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|
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<Viewbox Grid.Row="0" Grid.Column="2" Stretch="None"> |
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<Path Fill="Blue" Data="{StaticResource Acorn}"/> |
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</Viewbox> |
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<Viewbox Grid.Row="1" Grid.Column="2" Stretch="Fill"> |
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<Path Fill="Blue" Data="{StaticResource Acorn}"/> |
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</Viewbox> |
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<Viewbox Grid.Row="2" Grid.Column="2" Stretch="Uniform"> |
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<Path Fill="Blue" Data="{StaticResource Acorn}"/> |
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</Viewbox> |
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<Viewbox Grid.Row="3" Grid.Column="2" Stretch="UniformToFill"> |
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<Path Fill="Blue" Data="{StaticResource Acorn}"/> |
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</Viewbox> |
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</Grid> |
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</Grid> |
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</UserControl> |
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@ -0,0 +1,18 @@ |
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using Avalonia.Controls; |
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using Avalonia.Markup.Xaml; |
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|
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namespace ControlCatalog.Pages |
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{ |
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public class ViewboxPage : UserControl |
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{ |
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public ViewboxPage() |
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{ |
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this.InitializeComponent(); |
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} |
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|
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private void InitializeComponent() |
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{ |
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AvaloniaXamlLoader.Load(this); |
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} |
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} |
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} |
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@ -0,0 +1,124 @@ |
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using System; |
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using Avalonia.Media; |
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|
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namespace Avalonia.Controls |
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{ |
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/// <summary>
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/// Viewbox is used to scale single child.
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/// </summary>
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/// <seealso cref="Avalonia.Controls.Decorator" />
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public class Viewbox : Decorator |
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{ |
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/// <summary>
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/// The stretch property
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/// </summary>
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public static AvaloniaProperty<Stretch> StretchProperty = |
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AvaloniaProperty.RegisterDirect<Viewbox, Stretch>(nameof(Stretch), |
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v => v.Stretch, (c, v) => c.Stretch = v, Stretch.Uniform); |
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private Stretch _stretch = Stretch.Uniform; |
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/// <summary>
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/// Gets or sets the stretch mode,
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/// which determines how child fits into the available space.
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/// </summary>
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/// <value>
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/// The stretch.
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/// </value>
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public Stretch Stretch |
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{ |
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get => _stretch; |
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set => SetAndRaise(StretchProperty, ref _stretch, value); |
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} |
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|
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static Viewbox() |
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{ |
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ClipToBoundsProperty.OverrideDefaultValue<Viewbox>(true); |
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AffectsMeasure<Viewbox>(StretchProperty); |
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} |
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protected override Size MeasureOverride(Size availableSize) |
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{ |
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var child = Child; |
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if (child != null) |
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{ |
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child.Measure(Size.Infinity); |
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var childSize = child.DesiredSize; |
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var scale = GetScale(availableSize, childSize, Stretch); |
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return childSize * scale; |
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} |
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return new Size(); |
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} |
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protected override Size ArrangeOverride(Size finalSize) |
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{ |
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var child = Child; |
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if (child != null) |
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{ |
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var childSize = child.DesiredSize; |
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var scale = GetScale(finalSize, childSize, Stretch); |
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var scaleTransform = child.RenderTransform as ScaleTransform; |
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if (scaleTransform == null) |
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{ |
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child.RenderTransform = scaleTransform = new ScaleTransform(scale.X, scale.Y); |
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child.RenderTransformOrigin = RelativePoint.TopLeft; |
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} |
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scaleTransform.ScaleX = scale.X; |
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scaleTransform.ScaleY = scale.Y; |
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child.Arrange(new Rect(childSize)); |
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return childSize * scale; |
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} |
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return new Size(); |
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} |
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private static Vector GetScale(Size availableSize, Size childSize, Stretch stretch) |
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{ |
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double scaleX = 1.0; |
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double scaleY = 1.0; |
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bool validWidth = !double.IsPositiveInfinity(availableSize.Width); |
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bool validHeight = !double.IsPositiveInfinity(availableSize.Height); |
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if (stretch != Stretch.None && (validWidth || validHeight)) |
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{ |
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scaleX = childSize.Width <= 0.0 ? 0.0 : availableSize.Width / childSize.Width; |
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scaleY = childSize.Height <= 0.0 ? 0.0 : availableSize.Height / childSize.Height; |
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if (!validWidth) |
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{ |
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scaleX = scaleY; |
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} |
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else if (!validHeight) |
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{ |
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scaleY = scaleX; |
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} |
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else |
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{ |
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switch (stretch) |
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{ |
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case Stretch.Uniform: |
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scaleX = scaleY = Math.Min(scaleX, scaleY); |
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break; |
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case Stretch.UniformToFill: |
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scaleX = scaleY = Math.Max(scaleX, scaleY); |
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break; |
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} |
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} |
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} |
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return new Vector(scaleX, scaleY); |
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} |
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} |
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} |
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@ -1,13 +0,0 @@ |
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<Style xmlns="https://github.com/avaloniaui" Selector="LayoutTransformControl"> |
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<Setter Property="Template"> |
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<ControlTemplate> |
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<ContentPresenter Name="PART_ContentPresenter" |
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Background="{TemplateBinding Background}" |
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BorderBrush="{TemplateBinding BorderBrush}" |
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BorderThickness="{TemplateBinding BorderThickness}" |
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ContentTemplate="{TemplateBinding ContentTemplate}" |
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Content="{TemplateBinding Content}" |
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Padding="{TemplateBinding Padding}"/> |
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</ControlTemplate> |
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</Setter> |
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</Style> |
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@ -0,0 +1,105 @@ |
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using Avalonia.Controls.Shapes; |
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using Avalonia.Media; |
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using Xunit; |
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namespace Avalonia.Controls.UnitTests |
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{ |
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public class ViewboxTests |
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{ |
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[Fact] |
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public void Viewbox_Stretch_Uniform_Child() |
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{ |
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var target = new Viewbox() { Child = new Rectangle() { Width = 100, Height = 50 } }; |
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target.Measure(new Size(200, 200)); |
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target.Arrange(new Rect(new Point(0, 0), target.DesiredSize)); |
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Assert.Equal(new Size(200, 100), target.DesiredSize); |
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var scaleTransform = target.Child.RenderTransform as ScaleTransform; |
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Assert.NotNull(scaleTransform); |
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Assert.Equal(2.0, scaleTransform.ScaleX); |
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Assert.Equal(2.0, scaleTransform.ScaleY); |
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} |
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|
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[Fact] |
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public void Viewbox_Stretch_None_Child() |
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{ |
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var target = new Viewbox() { Stretch = Stretch.None, Child = new Rectangle() { Width = 100, Height = 50 } }; |
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target.Measure(new Size(200, 200)); |
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target.Arrange(new Rect(new Point(0, 0), target.DesiredSize)); |
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Assert.Equal(new Size(100, 50), target.DesiredSize); |
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var scaleTransform = target.Child.RenderTransform as ScaleTransform; |
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Assert.NotNull(scaleTransform); |
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Assert.Equal(1.0, scaleTransform.ScaleX); |
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Assert.Equal(1.0, scaleTransform.ScaleY); |
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} |
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|
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[Fact] |
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public void Viewbox_Stretch_Fill_Child() |
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{ |
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var target = new Viewbox() { Stretch = Stretch.Fill, Child = new Rectangle() { Width = 100, Height = 50 } }; |
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target.Measure(new Size(200, 200)); |
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target.Arrange(new Rect(new Point(0, 0), target.DesiredSize)); |
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Assert.Equal(new Size(200, 200), target.DesiredSize); |
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var scaleTransform = target.Child.RenderTransform as ScaleTransform; |
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Assert.NotNull(scaleTransform); |
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Assert.Equal(2.0, scaleTransform.ScaleX); |
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Assert.Equal(4.0, scaleTransform.ScaleY); |
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} |
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|
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[Fact] |
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public void Viewbox_Stretch_UniformToFill_Child() |
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{ |
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var target = new Viewbox() { Stretch = Stretch.UniformToFill, Child = new Rectangle() { Width = 100, Height = 50 } }; |
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target.Measure(new Size(200, 200)); |
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target.Arrange(new Rect(new Point(0, 0), target.DesiredSize)); |
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Assert.Equal(new Size(200, 200), target.DesiredSize); |
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var scaleTransform = target.Child.RenderTransform as ScaleTransform; |
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Assert.NotNull(scaleTransform); |
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Assert.Equal(4.0, scaleTransform.ScaleX); |
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Assert.Equal(4.0, scaleTransform.ScaleY); |
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} |
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|
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[Fact] |
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public void Viewbox_Stretch_Uniform_Child_With_Unrestricted_Width() |
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{ |
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var target = new Viewbox() { Child = new Rectangle() { Width = 100, Height = 50 } }; |
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target.Measure(new Size(double.PositiveInfinity, 200)); |
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target.Arrange(new Rect(new Point(0, 0), target.DesiredSize)); |
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Assert.Equal(new Size(400, 200), target.DesiredSize); |
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var scaleTransform = target.Child.RenderTransform as ScaleTransform; |
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Assert.NotNull(scaleTransform); |
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Assert.Equal(4.0, scaleTransform.ScaleX); |
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Assert.Equal(4.0, scaleTransform.ScaleY); |
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} |
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|
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[Fact] |
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public void Viewbox_Stretch_Uniform_Child_With_Unrestricted_Height() |
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{ |
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var target = new Viewbox() { Child = new Rectangle() { Width = 100, Height = 50 } }; |
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target.Measure(new Size(200, double.PositiveInfinity)); |
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target.Arrange(new Rect(new Point(0, 0), target.DesiredSize)); |
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Assert.Equal(new Size(200, 100), target.DesiredSize); |
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var scaleTransform = target.Child.RenderTransform as ScaleTransform; |
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Assert.NotNull(scaleTransform); |
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Assert.Equal(2.0, scaleTransform.ScaleX); |
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Assert.Equal(2.0, scaleTransform.ScaleY); |
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} |
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} |
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} |
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