Class Painter

The paint tool application object.
Defined in: index.js.

Class Summary
Constructor Attributes	Constructor Name and Description
	Painter()

Field Summary
Field Attributes	Field Name and Description
	buffer Holds the buffer canvas and context references.
	layer Holds the current layer ID, canvas and context references.
	tool The instance of the active tool object.
	tool_default The default tool ID.

Method Summary
Method Attributes	Method Name and Description
<private> <inner>	ev_canvas(ev) The Canvas event handler.
<private> <inner>	ev_tool_change() The event handler for any changes made to the tool selector.
<private> <inner>	init() Initialize the paint application.
	layerUpdate() This method draws the buffer canvas on top of the current image layer, after which the buffer is cleared.

Class Detail

Painter()

Field Detail

{Object} buffer

Holds the buffer canvas and context references.

{Object} layer

Holds the current layer ID, canvas and context references.

{Object} tool

The instance of the active tool object.

See:: Painter#tool_default holds the ID of the tool which is activated when the application loads.; PaintTools The object which holds the implementation of each drawing tool.

{String} tool_default

The default tool ID.

See:: PaintTools The object which holds the implementation of each drawing tool.

Method Detail

<private> <inner> ev_canvas(ev)

The Canvas event handler.

This method determines the mouse position relative to the canvas element, after which it invokes the method of the currently active tool with the same name as the current event type. For example, for the mousedown event the tool.mousedown() method is invoked.

The mouse coordinates are added to the ev DOM Event object: ev.x_ and ev.y_.

Parameters:
{Event} ev: The DOM Event object.

<private> <inner> ev_tool_change()

The event handler for any changes made to the tool selector.

<private> <inner> init()

Initialize the paint application.

layerUpdate()

This method draws the buffer canvas on top of the current image layer, after which the buffer is cleared. This function is called each time when the user completes a drawing operation.

Classes

Class Painter