kity
Version:
Kity Graphic Library
125 lines (76 loc) • 2.82 kB
JavaScript
/*
* 图形事件包装类
* */
define(function(require, exprots, module) {
var Matrix = require('./matrix'),
Utils = require('../core/utils'),
Point = require('./point');
return require('../core/class').createClass('ShapeEvent', {
constructor: function(event) {
var target = null;
// dom 事件封装对象
if (!Utils.isObject(event.target)) {
this.type = event.type;
target = event.target;
// use标签有特殊属性， 需要区别对待
if (target.correspondingUseElement) {
target = target.correspondingUseElement;
}
this.originEvent = event;
this.targetShape =
target.shape ||
target.paper ||
event.currentTarget &&
(event.currentTarget.shape || event.currentTarget.paper);
if (event._kityParam) {
Utils.extend(this, event._kityParam);
}
// 普通事件封装对象
} else {
Utils.extend(this, event);
}
},
preventDefault: function() {
var evt = this.originEvent;
if (!evt) {
return true;
}
if (evt.preventDefault) {
evt.preventDefault();
return evt.cancelable;
} else {
evt.returnValue = false;
return true;
}
},
//当前鼠标事件在用户坐标系中点击的点的坐标位置
getPosition: function(refer, touchIndex) {
if (!this.originEvent) {
return null;
}
var eventClient = this.originEvent.touches ?
this.originEvent.touches[touchIndex || 0] :
this.originEvent;
var target = this.targetShape;
var targetNode = target.shapeNode || target.node;
var pScreen = new Point(
eventClient && eventClient.clientX || 0,
eventClient && eventClient.clientY || 0
);
var pTarget = Matrix.transformPoint(pScreen, targetNode.getScreenCTM().inverse());
var pRefer = Matrix.getCTM(target, refer || 'view').transformPoint(pTarget);
return pRefer;
},
stopPropagation: function() {
var evt = this.originEvent;
if (!evt) {
return true;
}
if (evt.stopPropagation) {
evt.stopPropagation();
} else {
evt.cancelBubble = false;
}
}
});
});