Class EvasCanvas

Definition

Namespace:: ElmSharp

Assembly:: ElmSharp.dll

API Level:: preview

Low-level Evas canvas functions. Subgroups will be present more than the high-level ones, though. Most of these functions deal with low-level Evas actions like: create/destroy raw canvases, not bound to any displaying engine. tell a canvas, I got focused (in a windowing context, for example). tell a canvas, a region should not be calculated anymore in rendering. tell a canvas, to render its contents immediately. Most users will be using Evas by means of the Ecore_Evas wrapper, which deals with all the above mentioned issues automatically for them. Thus, you will be looking at this section only if you're building low-level stuff. The groups within, present you functions that deal with the canvas directly too, and not yet with its objects. They are the functions you need to use at a minimum to get a working canvas.


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public class EvasCanvas

Inheritance: System.Object

EvasCanvas

Properties

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ImageCacheSize

Gets or sets the image cache. This function returns the image cache size of the canvas in bytes.

Declaration


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public int ImageCacheSize { get; set; }

Property Value

Type	Description
Int32

API Level: preview

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Pointer

Gets the current known default pointer coordinates. This function returns the current known canvas unit coordinates of the mouse pointer.

Declaration


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public Point Pointer { get; }

Property Value

Type	Description
Point

API Level: preview

Methods

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AddDamageRectangle(Int32, Int32, Int32, Int32)

Adds a damage rectangle.

Declaration


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public void AddDamageRectangle(int x, int y, int width, int height)

Parameters

Type	Name	Description
Int32	x	The rectangle's top left corner's horizontal coordinate.
Int32	y	The rectangle's top left corner's vertical coordinate.
Int32	width	The rectangle's width.
Int32	height	The rectangle's height.

API Level: preview

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AddEventAction(EvasObjectCallbackType, Action)

Adds or registers an event to a given canvas event.

Declaration


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public void AddEventAction(EvasObjectCallbackType type, Action action)

Parameters

Type	Name	Description
EvasObjectCallbackType	type	The type of event that triggers.
System.Action	action	The action to be called when the event is triggered.

API Level: preview

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AddObscuredRectangle(Int32, Int32, Int32, Int32)

Adds an "obscured region" to an Evas canvas.

Declaration


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public void AddObscuredRectangle(int x, int y, int width, int height)

Parameters

Type	Name	Description
Int32	x	The rectangle's top left corner's horizontal coordinate.
Int32	y	The rectangle's top left corner's vertical coordinate.
Int32	width	The rectangle's width.
Int32	height	The rectangle's height.

API Level: preview

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ClearObscuredRectangle()

Removes all the "obscured regions" from an Evas canvas.

Declaration


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public void ClearObscuredRectangle()

API Level: preview

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DeleteEventAction(EvasObjectCallbackType, Action)

Deletes an event to a given canvas event.

Declaration


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public void DeleteEventAction(EvasObjectCallbackType type, Action action)

Parameters

Type	Name	Description
EvasObjectCallbackType	type	The type of event that triggers.
System.Action	action	The action to be called when the event is triggered

API Level: preview

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FlushImageCache()

Flushes the image cache of the canvas.

Declaration


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public void FlushImageCache()