%PDF-
%PDF-
Mini Shell
Mini Shell
(function() {
// constants
var HASH = '#',
BEFORE_DRAW ='beforeDraw',
DRAW = 'draw',
/*
* 2 - 3 - 4
* | |
* 1 - 0 5
* |
* 8 - 7 - 6
*/
INTERSECTION_OFFSETS = [
{x: 0, y: 0}, // 0
{x: -1, y: 0}, // 1
{x: -1, y: -1}, // 2
{x: 0, y: -1}, // 3
{x: 1, y: -1}, // 4
{x: 1, y: 0}, // 5
{x: 1, y: 1}, // 6
{x: 0, y: 1}, // 7
{x: -1, y: 1} // 8
],
INTERSECTION_OFFSETS_LEN = INTERSECTION_OFFSETS.length;
Kinetic.Util.addMethods(Kinetic.Layer, {
____init: function(config) {
this.nodeType = 'Layer';
this.canvas = new Kinetic.SceneCanvas();
this.hitCanvas = new Kinetic.HitCanvas();
// call super constructor
Kinetic.BaseLayer.call(this, config);
},
_setCanvasSize: function(width, height) {
this.canvas.setSize(width, height);
this.hitCanvas.setSize(width, height);
},
_validateAdd: function(child) {
var type = child.getType();
if (type !== 'Group' && type !== 'Shape') {
Kinetic.Util.error('You may only add groups and shapes to a layer.');
}
},
/**
* get visible intersection shape. This is the preferred
* method for determining if a point intersects a shape or not
* @method
* @memberof Kinetic.Layer.prototype
* @param {Object} pos
* @param {Number} pos.x
* @param {Number} pos.y
* @returns {Kinetic.Shape}
*/
getIntersection: function(pos) {
var obj, i, intersectionOffset, shape;
if(this.hitGraphEnabled() && this.isVisible()) {
for (i=0; i<INTERSECTION_OFFSETS_LEN; i++) {
intersectionOffset = INTERSECTION_OFFSETS[i];
obj = this._getIntersection({
x: pos.x + intersectionOffset.x,
y: pos.y + intersectionOffset.y
});
shape = obj.shape;
if (shape) {
return shape;
}
else if (!obj.antialiased) {
return null;
}
}
}
else {
return null;
}
},
_getIntersection: function(pos) {
var p = this.hitCanvas.context._context.getImageData(pos.x, pos.y, 1, 1).data,
p3 = p[3],
colorKey, shape;
// fully opaque pixel
if(p3 === 255) {
colorKey = Kinetic.Util._rgbToHex(p[0], p[1], p[2]);
shape = Kinetic.shapes[HASH + colorKey];
return {
shape: shape
};
}
// antialiased pixel
else if(p3 > 0) {
return {
antialiased: true
};
}
// empty pixel
else {
return {};
}
},
drawScene: function(can, top) {
var layer = this.getLayer(),
canvas = can || (layer && layer.getCanvas());
this._fire(BEFORE_DRAW, {
node: this
});
if(this.getClearBeforeDraw()) {
canvas.getContext().clear();
}
Kinetic.Container.prototype.drawScene.call(this, canvas, top);
this._fire(DRAW, {
node: this
});
return this;
},
// the apply transform method is handled by the Layer and FastLayer class
// because it is up to the layer to decide if an absolute or relative transform
// should be used
_applyTransform: function(shape, context, top) {
var m = shape.getAbsoluteTransform(top).getMatrix();
context.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
},
drawHit: function(can, top) {
var layer = this.getLayer(),
canvas = can || (layer && layer.hitCanvas);
if(layer && layer.getClearBeforeDraw()) {
layer.getHitCanvas().getContext().clear();
}
Kinetic.Container.prototype.drawHit.call(this, canvas, top);
return this;
},
/**
* clear scene and hit canvas contexts tied to the layer
* @method
* @memberof Kinetic.Layer.prototype
* @param {Object} [bounds]
* @param {Number} [bounds.x]
* @param {Number} [bounds.y]
* @param {Number} [bounds.width]
* @param {Number} [bounds.height]
* @example
* layer.clear();<br>
* layer.clear(0, 0, 100, 100);
*/
clear: function(bounds) {
this.getContext().clear(bounds);
this.getHitCanvas().getContext().clear(bounds);
return this;
},
// extend Node.prototype.setVisible
setVisible: function(visible) {
Kinetic.Node.prototype.setVisible.call(this, visible);
if(visible) {
this.getCanvas()._canvas.style.display = 'block';
this.hitCanvas._canvas.style.display = 'block';
}
else {
this.getCanvas()._canvas.style.display = 'none';
this.hitCanvas._canvas.style.display = 'none';
}
return this;
},
/**
* enable hit graph
* @name enableHitGraph
* @method
* @memberof Kinetic.Layer.prototype
* @returns {Node}
*/
enableHitGraph: function() {
this.setHitGraphEnabled(true);
return this;
},
/**
* disable hit graph
* @name enableHitGraph
* @method
* @memberof Kinetic.Layer.prototype
* @returns {Node}
*/
disableHitGraph: function() {
this.setHitGraphEnabled(false);
return this;
}
});
Kinetic.Util.extend(Kinetic.Layer, Kinetic.BaseLayer);
Kinetic.Factory.addGetterSetter(Kinetic.Layer, 'hitGraphEnabled', true);
/**
* get/set hitGraphEnabled flag. Disabling the hit graph will greatly increase
* draw performance because the hit graph will not be redrawn each time the layer is
* drawn. This, however, also disables mouse/touch event detection
* @name hitGraphEnabled
* @method
* @memberof Kinetic.Layer.prototype
* @param {Boolean} enabled
* @returns {Boolean}
* @example
* // get hitGraphEnabled flag<br>
* var hitGraphEnabled = layer.hitGraphEnabled();<br><br>
*
* // disable hit graph<br>
* layer.hitGraphEnabled(false);<br><br>
*
* // enable hit graph<br>
* layer.hitGraphEnabled(true);
*/
Kinetic.Collection.mapMethods(Kinetic.Layer);
})();
Zerion Mini Shell 1.0