Class Image

Definition

Namespace:

ElmSharp

Assembly:

ElmSharp.dll

The Image is a widget that allows one to load and display an image file on it, be it from a disk file or from a memory region. Inherits Widget.

public class Image : Widget, IAccessibleObject

Inheritance

object

EvasObject

AccessibleObject

Widget

Image

Derived

Icon

Icon

Icon

Icon

Icon

Icon

Icon

Icon

Icon

Icon

Implements

IAccessibleObject

Constructors

Image(EvasObject)

Creates and initializes a new instance of the Image class.

Declaration

public Image(EvasObject parent)

Parameters

Type	Name	Description
EvasObject	parent	The parent is a given container, which will be attached by the image as a child. It's EvasObject type.

Properties

BackgroundColor

Sets the background color.

Declaration

public override Color BackgroundColor { set; }

Property Value

Type	Description
Color

Overrides

Widget.BackgroundColor

BorderCenterFillMode

Sets or gets if the center part of the given image object (not the border) should be drawn.

Declaration

public ImageBorderFillMode BorderCenterFillMode { get; set; }

Property Value

Type	Description
ImageBorderFillMode

Remarks

When rendering, the image may be scaled to fit the size of the image object. This function sets if the center part of the scaled image is to be drawn or left completely blank, or forced to be solid. Very useful for frames and decorations.

CanFillOutside

Sets or gets whether the image fills the entire object area, when keeping the aspect ratio.

Declaration

public bool CanFillOutside { get; set; }

Property Value

Type	Description
bool

CanScaleDown

Sets or gets whether the object is down resizable.

Declaration

public bool CanScaleDown { get; set; }

Property Value

Type	Description
bool

CanScaleUp

Sets or gets whether the object is up resizable.

Declaration

public bool CanScaleUp { get; set; }

Property Value

Type	Description
bool

Color

Sets or gets the image color.

Declaration

public override Color Color { get; set; }

Property Value

Type	Description
Color

Overrides

EvasObject.Color

File

Gets the file that is used as an image.

Declaration

public string File { get; }

Property Value

Type	Description
string

ImageObject

Gets the inlined image object of the image widget. This property allows one to get the underlying EvasObject of type Image from this elementary widget. It can be useful to do things like save the image to a file, etc.

Declaration

public EvasImage ImageObject { get; }

Property Value

Type	Description
EvasImage

Remarks

Be careful not to manipulate it, as it is under the control of the widget.

IsAnimated

Sets or gets whether an image object (which supports animation) is to animate itself.

Declaration

public bool IsAnimated { get; set; }

Property Value

Type	Description
bool

IsAnimatedAvailable

Gets whether an image object supports animation.

Declaration

public bool IsAnimatedAvailable { get; }

Property Value

Type	Description
bool

IsAnimationPlaying

Sets or gets whether an image object is under animation.

Declaration

public bool IsAnimationPlaying { get; set; }

Property Value

Type	Description
bool

Remarks

An image object, even if it supports animation, will be displayed by default without animation. To actually start playing any image object's animation, IsAnimated should be TRUE before setting this property true.

IsEditable

Sets or gets whether the image is 'editable'.

Declaration

public bool IsEditable { get; set; }

Property Value

Type	Description
bool

IsFixedAspect

Sets or gets whether the original aspect ratio of the image should be kept on resize.

Declaration

public bool IsFixedAspect { get; set; }

Property Value

Type	Description
bool

IsOpaque

Sets or gets whether the alpha channel data is being used on the given image object.

Declaration

public bool IsOpaque { get; set; }

Property Value

Type	Description
bool

IsScaling

Sets or gets whether scaling is disabled on the object.

Declaration

public bool IsScaling { get; set; }

Property Value

Type	Description
bool

IsSmooth

Sets or gets the smooth effect for an image.

Declaration

public bool IsSmooth { get; set; }

Property Value

Type	Description
bool

ObjectSize

Gets the current size of the image.

Declaration

public Size ObjectSize { get; }

Property Value

Type	Description
Size

Orientation

Sets or gets the image orientation.

Declaration

public ImageOrientation Orientation { get; set; }

Property Value

Type	Description
ImageOrientation

PrescaleSize

Sets or gets the prescale size for the image.

Declaration

public int PrescaleSize { get; set; }

Property Value

Type	Description
int

Methods

CreateHandle(EvasObject)

Sets the content at a part of a given container widget.

Declaration

protected override IntPtr CreateHandle(EvasObject parent)

Parameters

Type	Name	Description
EvasObject	parent	The parent is a given container, which will be attached by the image as a child. It's EvasObject type.

Returns

Type	Description
System.IntPtr	The new object, otherwise null if it cannot be created.

Overrides

EvasObject.CreateHandle(EvasObject)

GetPartColor(string)

Gets the color of the Color class for a given widget.

Declaration

public override Color GetPartColor(string part)

Parameters

Type	Name	Description
string	part	The name of the Color class.

Returns

Type	Description
Color	The color object.

Overrides

Widget.GetPartColor(string)

Load(byte*, long)

Sets a location in the memory to be used as an image object's source bitmap.

Declaration

[Obsolete("This method will be removed. Use Load(Stream stream) instead.")]
public bool Load(byte* img, long size)

Parameters

Type	Name	Description
byte*	img	The binary data that is used as an image source.
long	size	The size of the binary data blob img.

Returns

Type	Description
bool	(true = success, false = error)

Remarks

This function is handy when the contents of an image file are mapped into the memory, for example, the format string should be something like "png", "jpg", "tga", "tiff", "bmp" etc, when provided (null, on the contrary). This improves the loader performance as it tries the "correct" loader first, before trying a range of other possible loaders until one succeeds.

Load(Stream)

Sets the stream that is used as the image's source.

Declaration

public bool Load(Stream stream)

Parameters

Type	Name	Description
System.IO.Stream	stream	The stream that is used as an image source.

Returns

Type	Description
bool	(true = success, false = error)

Load(string)

Sets the file that is used as the image's source.

Declaration

public bool Load(string file)

Parameters

Type	Name	Description
string	file	The path to the file that is used as an image source.

Returns

Type	Description
bool	(true = success, false = error)

Load(Uri)

Sets the URI that is used as the image's source.

Declaration

public bool Load(Uri uri)

Parameters

Type	Name	Description
System.Uri	uri	The URI to the file that is used as an image source.

Returns

Type	Description
bool	(true = success, false = error)

LoadAsync(Stream, CancellationToken)

Sets the stream that is used as the image's source with async.

Declaration

public Task<bool> LoadAsync(Stream stream, CancellationToken cancellationToken = default)

Parameters

Type	Name	Description
System.IO.Stream	stream	The stream that is used as an image source.
System.Threading.CancellationToken	cancellationToken	The cancellation token.

Returns

Type	Description
System.Threading.Tasks.Task<TResult><bool>	(true = success, false = error)

LoadAsync(string, CancellationToken)

Sets the file that is used as the image's source with async.

Declaration

public Task<bool> LoadAsync(string file, CancellationToken cancellationToken = default)

Parameters

Type	Name	Description
string	file	The path to the file that is used as an image source.
System.Threading.CancellationToken	cancellationToken	The cancellation token.

Returns

Type	Description
System.Threading.Tasks.Task<TResult><bool>	(true = success, false = error)

LoadAsync(Uri, CancellationToken)

Sets the URI that is used as the image's source with async.

Declaration

public Task<bool> LoadAsync(Uri uri, CancellationToken cancellationToken = default)

Parameters

Type	Name	Description
System.Uri	uri	The URI to the file that is used as an image source.
System.Threading.CancellationToken	cancellationToken	The cancellation token.

Returns

Type	Description
System.Threading.Tasks.Task<TResult><bool>	(true = success, false = error)

SetBorder(int, int, int, int)

Sets the dimensions for an image object's border, a region which is not scaled together with its center ever.

Declaration

public void SetBorder(int left, int right, int top, int bottom)

Parameters

Type	Name	Description
int	left	The border's left width.
int	right	The border's right width.
int	top	The border's top width.
int	bottom	The border's bottom width.

SetPartColor(string, Color)

Sets the color of the Color class for a given widget.

Declaration

public override void SetPartColor(string part, Color color)

Parameters

Type	Name	Description
string	part	The name of the Color class.
Color	color	The struct of the Color class.

Overrides

Widget.SetPartColor(string, Color)

Events

Clicked

Clicked will be triggered when the image is clicked.

Declaration

public event EventHandler Clicked

Event Type

Type	Description
System.EventHandler

LoadingCompleted

LoadingCompleted will be triggered when the image is loaded completely.

Declaration

public event EventHandler LoadingCompleted

Event Type

Type	Description
System.EventHandler

LoadingFailed

Clicked will be triggered when the image fails to load.

Declaration

public event EventHandler LoadingFailed

Event Type

Type	Description
System.EventHandler

Implements

IAccessibleObject

Extension Methods

RotaryEventExtensions.Activate(EvasObject)

RotaryEventExtensions.AddRotaryEventHandler(EvasObject, RotaryEventHandler)

RotaryEventExtensions.Deactivate(EvasObject)

RotaryEventExtensions.RemoveRotaryEventHandler(EvasObject, RotaryEventHandler)