Compartir a través de


DpiPrescaleThemedImageSourceConverter Class

Definition

Caution

Use Microsoft.VisualStudio.Imaging.CrispImage instead.

Converts an ImageSource into another ImageSource. If the input image ia a BitmapSource, the transformed BitmapSource has its halo color mapped to the given background color and is conditionally rendered as disabled. The resultant image is then pre-scaled on High DPI to the largest zoom multiple of 100% smaller than the DPI zoom.This converter chains the behavior of ThemedImageSourceConverter and DpiPrescaleImageSourceConverter.

public ref class DpiPrescaleThemedImageSourceConverter : Microsoft::VisualStudio::PlatformUI::MultiValueConverter<System::Windows::Media::ImageSource ^, System::Windows::Media::Color, bool, System::Windows::Media::ImageSource ^>
[Windows::Foundation::Metadata::WebHostHidden]
class DpiPrescaleThemedImageSourceConverter : Microsoft::VisualStudio::PlatformUI::MultiValueConverter<System::Windows::Media::ImageSource, System::Windows::Media::Color, bool, System::Windows::Media::ImageSource const &>
public class DpiPrescaleThemedImageSourceConverter : Microsoft.VisualStudio.PlatformUI.MultiValueConverter<System.Windows.Media.ImageSource,System.Windows.Media.Color,bool,System.Windows.Media.ImageSource>
[System.Obsolete("Use Microsoft.VisualStudio.Imaging.CrispImage instead.")]
public class DpiPrescaleThemedImageSourceConverter : Microsoft.VisualStudio.PlatformUI.MultiValueConverter<System.Windows.Media.ImageSource,System.Windows.Media.Color,bool,System.Windows.Media.ImageSource>
type DpiPrescaleThemedImageSourceConverter = class
    inherit MultiValueConverter<ImageSource, Color, bool, ImageSource>
[<System.Obsolete("Use Microsoft.VisualStudio.Imaging.CrispImage instead.")>]
type DpiPrescaleThemedImageSourceConverter = class
    inherit MultiValueConverter<ImageSource, Color, bool, ImageSource>
Public Class DpiPrescaleThemedImageSourceConverter
Inherits MultiValueConverter(Of ImageSource, Color, Boolean, ImageSource)
Inheritance
Derived
Attributes

Remarks

A common usage pattern can look like this:

<imaging:DpiPrescaleThemedImageSourceConverter x:Key="DpiPrescaleThemedImageSourceConverter" />  
    <Image UseLayoutRounding="True" SnapsToDevicePixels="True" Width="16" Height="16">  
        <Image.Source>    
            <MultiBinding Converter="{StaticResource DpiPrescaleThemedImageSourceConverter}">  
                <Binding Path="Icon" />  
                <Binding Path="(imaging:ImageThemingUtilities.ImageBackgroundColor)" RelativeSource="{RelativeSource Self}" />  
                <Binding Source="{x:Static utilities:Boxes.BooleanTrue}" />  
            </MultiBinding>  
        </Image.Source>  
    </Image>  

Where the image dimensions aren't known at compile time, instead of specifying exact Width/Height properties, a layout transform can be specified on the image like this:

<Image.LayoutTransform>  
    ///          <ScaleTransform ScaleX="{x:Static util:DpiHelper.Default.PreScaledImageLayoutTransformScaleX}" ScaleY="{x:Static util:DpiHelper.Default.PreScaledImageLayoutTransformScaleY}" />  
    ///       </Image.LayoutTransform>  

Note that when using image pre-scaling, either the original image size has to be specified, or a reverse layout transform has to be applied to the result, to maintain the desired original image size

Constructors

DpiPrescaleThemedImageSourceConverter()

Initializes a new instance of DpiPrescaleThemedImageSourceConverter.

Properties

DpiHelper

Gets the default DpiHelper.

Methods

CheckValue<T>(Object[], Int32, String)

Validates that values[index] is of type T

(Inherited from MultiValueConverterBase<TTarget>)
Convert(ImageSource, Color, Boolean, Object, CultureInfo)

Converts the image.

Convert(Object[], Type, Object, CultureInfo)

Microsoft internal use only.

(Inherited from MultiValueConverter<T1,T2,T3,TTarget>)
Convert(T1, T2, T3, Object, CultureInfo)

Microsoft internal use only.

(Inherited from MultiValueConverter<T1,T2,T3,TTarget>)
ConvertBack(Object, Type[], Object, CultureInfo)

Microsoft internal use only.

(Inherited from MultiValueConverter<T1,T2,T3,TTarget>)
ConvertBack(TTarget, T1, T2, T3, Object, CultureInfo)

Microsoft internal use only.

(Inherited from MultiValueConverter<T1,T2,T3,TTarget>)
ConvertBackCore(Object, Type[], Object, CultureInfo) (Inherited from MultiValueConverter<T1,T2,T3,TTarget>)
ConvertCore(Object[], Type, Object, CultureInfo) (Inherited from MultiValueConverter<T1,T2,T3,TTarget>)
MakeConverterFunctionNotDefinedException(String)

An exception thrown when the converter function isn’t defined.

(Inherited from MultiValueConverterBase<TTarget>)
ValidateConvertBackParameters(Object, Type[])

Validates the parameters passed to IMultiValueConverter.ConvertBack

(Inherited from MultiValueConverterBase<TTarget>)
ValidateConvertParameters(Object[], Type)

Validates the parameters passed to IMultiValueConverter.Convert

(Inherited from MultiValueConverterBase<TTarget>)

Applies to