C# Класс BrightIdeasSoftware.ImageRenderer

Render an image that comes from our data source.

The image can be sourced from: a byte-array (normally when the image to be shown is stored as a value in a database) an int, which is treated as an index into the image list a string, which is treated first as a file name, and failing that as an index into the image list an ICollection of ints or strings, which will be drawn as consecutive images

If an image is an animated GIF, it's state is stored in the SubItem object.

By default, the image renderer does not render animations (it begins life with animations paused). To enable animations, you must call Unpause().

In the current implementation (2009-09), each column showing animated gifs must have a different instance of ImageRenderer assigned to it. You cannot share the same instance of an image renderer between two animated gif columns. If you do, only the last column will be animated.

Наследование: BaseRenderer

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Private Properties

Свойство	Тип	Описание

Открытые методы

Метод	Описание
ImageRenderer ( ) : System	Make an empty image renderer
ImageRenderer ( bool startAnimations ) : System	Make an empty image renderer that begins life ready for animations
OnTimer ( Object state ) : void	This is the method that is invoked by the timer. It basically switches control to the listview thread.
Pause ( ) : void	Pause any animations
Render ( Graphics g, Rectangle r ) : void	Draw our image
Unpause ( ) : void	Unpause any animations

Защищенные методы

Метод	Описание
GetImageFromAspect ( ) : Image	Translate our Aspect into an image. The strategy is: If its a byte array, we treat it as an in-memory image If it's an int, we use that as an index into our image list If it's a string, we try to load a file by that name. If we can't, we use the string as an index into our image list.
OnTimerInThread ( ) : void	This is the OnTimer callback, but invoked in the same thread as the creator of the ListView. This method can use all of ListViews methods without creating a CrossThread exception.

Описание методов

GetImageFromAspect() защищенный Метод

Translate our Aspect into an image.

The strategy is: If its a byte array, we treat it as an in-memory image If it's an int, we use that as an index into our image list If it's a string, we try to load a file by that name. If we can't, we use the string as an index into our image list.

protected GetImageFromAspect ( ) : Image
Результат	Image

ImageRenderer() публичный Метод

Make an empty image renderer

public ImageRenderer ( ) : System
Результат	System

ImageRenderer() публичный Метод

Make an empty image renderer that begins life ready for animations

public ImageRenderer ( bool startAnimations ) : System
startAnimations	bool
Результат	System

OnTimer() публичный Метод

This is the method that is invoked by the timer. It basically switches control to the listview thread.

public OnTimer ( Object state ) : void
state	Object	not used
Результат	void

OnTimerInThread() защищенный Метод

This is the OnTimer callback, but invoked in the same thread as the creator of the ListView. This method can use all of ListViews methods without creating a CrossThread exception.

protected OnTimerInThread ( ) : void
Результат	void

Pause() публичный Метод

Pause any animations

public Pause ( ) : void
Результат	void

Render() публичный Метод

Draw our image

public Render ( Graphics g, Rectangle r ) : void
g	System.Drawing.Graphics
r	System.Drawing.Rectangle
Результат	void

Unpause() публичный Метод

Unpause any animations

public Unpause ( ) : void
Результат	void