大佬教程收集整理的这篇文章主要介绍了在Fabric.js中控制z-index,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
见http://jsfiddle.net/rFSEV/的状态.
var canvasS = new fabric.Canvas('canvasS',{ renderOnAddition: false,hovercursor: 'pointer',SELEction: false }); var bars = {}; //storage for bars (bar number indexed by group object) var SELEctedBar = null; //SELEcted bar (group object) var placeholder = new fabric.Text("XXXXX",{ fontSize: 12 }); //pass null or a bar function SELEctBar(bar) { if (SELEctedBar) { //remove the old topmost bar and put it BACk in the right zindex //PROBLEM: It doesn't go BACk; it stays at the same zindex SELEctedBar.remove(); canvass.insertAt(SELEctedBar,SELEctedBar.XZIndex,truE); SELEctedBar = null; } if (bar) { //put a placeholder object ("XXX" for now) in the position //where the bar was,and put the bar in the top position //so it shows topmost SELEctedBar = bar; canvass.insertAt(placeholder,truE); canvass.add(bar); canvass.renderAll(); } } canvass.on({ 'mouse:move': function(E) { //hook up dynamic zorder if (!e.target) return; if (bars[e.target]) SELEctBar(e.target); else SELEctBar(null); },}); var objcount = canvass.getObjects().length; //create bars for (var i = 0; i < 20; ++i) { var rect = new fabric.Rect({ left: 0,top: 0,rx: 3,ry: 3,stroke: 'red',width: 200,height: 25 }); rect.setGradientFill({ x1: 0,y1: 0,x2: 0,y2: rect.height,colorStops: { 0: '#080',1: '#fff' } }); var text = new fabric.Text("Bar number " + (i+1),{ fontSize: 12 }); var group = new fabric.Group([ rect,text ],{ left: i + 101,top: i * 4 + 26 }); group.hasControls = group.hasBorders = false; //our properties (not part of fabriC) group.XBar = rect; group.XZIndex = objcount++; canvass.add(group); bars[group] = i; } canvass.renderAll();
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