Constructor
new GraphicsManager(options)
- Source:
Set up an instance of the graphics library.
Parameters:
| Name | Type | Description |
|---|---|---|
options |
Object | Options, primarily .canvas, the selector string for the canvas. If multiple are returned, we'll take the first one. If none is passed, we'll look for any canvas tag on the page. |
Methods
addEventListeners()
- Source:
Add all handlers to the window for triggering functions on the instance.
cleanup()
- Source:
Remove all handlers from the window and clean up any memory.
getCanvas() → {HTMLCanvasElement}
- Source:
Return the current canvas we are using. If there is no
canvas on the page this will return null.
Returns:
The current canvas.
- Type
- HTMLCanvasElement
getContext() → {CanvasRenderingContext2D}
- Source:
Return the 2D graphics context for this graphics
object, or null if none exists.
Returns:
The 2D graphics context.
- Type
- CanvasRenderingContext2D
getPixel(x, y) → {Array.<number>}
- Source:
Return the RGBA value of the pixel at the x, y coordinate.
Parameters:
| Name | Type | Description |
|---|---|---|
x |
number | X coordinate |
y |
number | Y coordinate |
Returns:
pixel - the [r, g, b, a] values for the pixel.
- Type
- Array.<number>
setCurrentCanvas(canvasSelector)
- Source:
Set the current canvas we are working with. If no canvas
tag matches the selectorv then we will just have the current
canvas set to null.
Parameters:
| Name | Type | Description |
|---|---|---|
canvasSelector |
string | String representing canvas class or ID. Selected with jQuery. |
waitingForClick() → {boolean}
- Source:
Whether the graphics instance is waiting for a click.
Returns:
Whether or not the instance is waiting for a click.
- Type
- boolean