ocDrawingTools

OneCode offers cross platform development with a specialty in 3D. As part of our deveopment for one of our projects we developed an easy to use image template editor. The template is based on asSvg and asBase libraries.

You can use this as a ready made template or include it in your project and use it appropiately.

A live demo is available here:http://labs.onecode.co.il/drawingTools

asSVG

asSVG is a library for building svg elements in HTML5

Simple Example

Draw an image on screen

let aDiv=document.getElementById("imageDiv");
let aSVGStage = asSvg.Stage.cretaeStage(aDiv, aDiv.clientWidth, aDivRect.clientHeight);
let aImage=new asSvgImage("assets/railway.png");
aSVGStage.addChild(aImage);

Another example:

The asSvg library also supports rotating,moving and scaling of an svg element.

aImage.startDrag();// to move the element
aImage.rotation=180; //to rotate the element 180 degrees
aImage.setScale(1.5); // to scale the element 1.5 times it's orginal size

Classes

Display Object Abstract base class for all display elements in SVG.

Stage The root level display container for display elements

TextField Class that renders a single text line to the stage

Foreign Object Renders a non-svg (html) element to the stage

Image Renders an image to the stage

Rect Renders a rectangle to the stage

Shape Renders a display element for drawing vector data

Circle Renders a circle to the stage

Ellipse Renders an ellipse to the stage

Line Renders a line to the stage

asBase

The asBase library contains many usefull modules that you can include in your project.

Classes

EventManager Manages the dispatching and listening of events between any object.

MouseEvents Contains global constants for all the mouse events

Keyboard Code Contains global contstants for all keyboard codes

Point Class representing a 2D Point

Math Utils Contains some useful global math equations, like the distance equation,converting deg to rad etc.

Rectangle Class representing a rectangle

Matrix Class representing a transform matrix

Simple Example

Dispatching a custom event

Pass the event,owner and data(optional) as arguments

asBase.events.EventManager.dispatchEvent("CustomEvent",this);

Listening to a custom event

Pass the event, callback function,owner, or data(optional) as arguments

asBase.events.EventManager.addEventListener("CustomEvent",()=>this.someFunc(),this);

Another exmaple

Calculate the distance between two 2D points

let point1=new asBase.Math.Point(3,-10);
let point2=new asBase.Math.Point(-8,7);
let aDist=asBase.Math.MathUtils.distance(point1,point2);

Installation

Download and include the asBase,asSvg and image folders in your project.

You can download the asSvg and asBase modules independently here:https://github.com/rtsamir/Allseated.git

How to use

Create a HTMLDivElement that the image will be set inside.

Create an instance of the ImageDrawing and ImageSaveCanvas class

let aDiv=document.createElement(div);
document.appendChild(aDiv);`
let aImageDrawing=new image.ImageDrawing(aDiv);
let aImageSave=new image.ImageSaveCanvas(aImageDrawing);

Set an Image

let aUrl="assets/img.png"; //url of image
aImageDrawing.setPicture(aURL);

Rotate an Image

aImageDrawing.rotate(90);

Download an Image

aImageSave.getImage();

Draw on Image

let aColor='#00000' //draw color
aImageDrawing.startDraw(aColor);

Write on Image

You can add a text box the image as well:

aImageDrawing.onSetText();

Classes

ImageDrawing Manages the scaling,dragging,rotation and drawing of the image

ImageSave Manages the dowloading and saving of the image

ImageCrop Manages cropping of the image

Modules

action

Module for all classes that implement the IAction interfaces. This module executes the redo/unod functionallity of the program. Each "user action" is repsented by a class

Example

You can add a new action and undo/redo an action.

Add a clear all shapes from the image action
let aActionManager=new ActionManager();
let aAction=new action.ClearAllAction(sprite);//instance of asSVG.Sprite that the shapes were cleared from
aActionManager.addAction(aAction);// Instance of class that implements IAction
aActionManager.undo(); // undo the last action
aActionManager.redo() // redo the last action undone.

shapes

Module for all classes that extend the Shape Class. Contains classes for shapes drawn by the user on the image

Arrow An arrow object drawn by the user

Circle A circle object drawn by the user

Scribble A scribble object drawn by the user

Example

Drawing a new shape:

let aSprite=new asSvg.Sprite(); //create a new sprite or use a existing one to draw the shape on
aStage.addChild(aSprite); // add the sprite to the stage you created earlier on
let aCircle=new shapes.Circle(aSprite ,"#fffff");  // sprite to draw circle on, color to draw circle

Globals

Class for constant variales used by all the other classes

Important Globals

image.Globals.isDrawInBound Determines whether shapes can be drawn only in the image's bounds. (true-only in bound, false,anywhere in the frame)

image.Globals.isFullScreen Determines when the frame is on the full screen or not

image.Globals.mTextArray Array of all text objects in the frame

image.Globals.mCircles Array of all shape objects in the frame

image.Globals.isArrowMode Determines whether the user is drawing an arrow or not

Documentation

Full Documentation is available here:http://labs.onecode.co.il/ocDrawingTools/doc

OneCodeTeam/ocDrawingTools

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