konva/src/shapes/Rect.js

///////////////////////////////////////////////////////////////////////
//  Rect
///////////////////////////////////////////////////////////////////////
/**
 * Rect constructor
 * @constructor
 * @augments Kinetic.Shape
 * @param {Object} config
 */
Kinetic.Rect = function(config) {
    this.setDefaultAttrs({
        width: 0,
        height: 0,
        cornerRadius: 0
    });

    this.shapeType = "Rect";

    config.drawFunc = function() {
        var context = this.getContext();
        context.beginPath();
        if(this.attrs.cornerRadius === 0) {
            // simple rect - don't bother doing all that complicated maths stuff.
            context.rect(0, 0, this.attrs.width, this.attrs.height);
        }
        else {
            // arcTo would be nicer, but browser support is patchy (Opera)
            context.moveTo(this.attrs.cornerRadius, 0);
            context.lineTo(this.attrs.width - this.attrs.cornerRadius, 0);
            context.arc(this.attrs.width - this.attrs.cornerRadius, this.attrs.cornerRadius, this.attrs.cornerRadius, Math.PI * 3 / 2, 0, false);
            context.lineTo(this.attrs.width, this.attrs.height - this.attrs.cornerRadius);
            context.arc(this.attrs.width - this.attrs.cornerRadius, this.attrs.height - this.attrs.cornerRadius, this.attrs.cornerRadius, 0, Math.PI / 2, false);
            context.lineTo(this.attrs.cornerRadius, this.attrs.height);
            context.arc(this.attrs.cornerRadius, this.attrs.height - this.attrs.cornerRadius, this.attrs.cornerRadius, Math.PI / 2, Math.PI, false);
            context.lineTo(0, this.attrs.cornerRadius);
            context.arc(this.attrs.cornerRadius, this.attrs.cornerRadius, this.attrs.cornerRadius, Math.PI, Math.PI * 3 / 2, false);
        }
        context.closePath();

        this.fill();
        this.stroke();
    };
    // call super constructor
    Kinetic.Shape.apply(this, [config]);
};
/*
 * Rect methods
 */
Kinetic.Rect.prototype = {
    /**
     * set width and height
     */
    setSize: function() {
        var size = Kinetic.GlobalObject._getSize(arguments);
        this.setAttrs(size);
    },
    /**
     * return rect size
     */
    getSize: function() {
        return {
            width: this.attrs.width,
            height: this.attrs.height
        };
    }
};

// extend Shape
Kinetic.GlobalObject.extend(Kinetic.Rect, Kinetic.Shape);

// add setters and getters
Kinetic.GlobalObject.addSetters(Kinetic.Rect, ['width', 'height', 'cornerRadius']);
Kinetic.GlobalObject.addGetters(Kinetic.Rect, ['width', 'height', 'cornerRadius']);

/**
 * set width
 * @param {Number} width
 */

/**
 * set height
 * @param {Number} height
 */

/**
 * set corner radius
 * @param {Number} radius
 */

/**
 * get width
 */

/**
 * get height
 */

/**
 * get corner radius
 */