1.fabric.js
在决定使用mxgraph.js开发流程图之前,尝试过用fabric.js来开发,结果发现并没有想象中的那么简单,而且用户体验非常差,下面是体验地址:
直到遇到一个致命bug,当我准备加一个双击图形输入文字功能,花了
一点时间捣鼓了一下,通过group组合实现了此功能,但是,第一次双击输入正常,第二次再次双击就出现莫名其妙的情况,最后反馈给作者说下个版本
不准备解决,看了下issues,也发现了类似的问题,此方案就此放弃。
2.GoJs
第二次有人推荐我使用GoJs,看了下功能确实强大,也找到了符合我想要的流程图应用,但是。。。。尝试运行简单的例子同步到Vue,没出什么问题,当同步
一个简单的流程图示例,各种问题,捣鼓了很久还是没能运行成功,最重要的它的api写法简直太难受,此方案也就此放弃。官方示例:
3.mxgraph.js
先上图来一波
体验地址:
说一下基础api的使用以及一些坑
1.定义全局Cell样式
this.style =new Object();
this.style[mxConstants.STYLE_DASHED] = 0;//0实线 1虚线this.style[mxConstants.STYLE_STROKEWIDTH] = 1;//边框宽度// this.style[mxConstants.STYLE_GRADIENTCOLOR] = 'red';//渐变色this.style[mxConstants.STYLE_GRADIENT_DIRECTION] = mxConstants.DIRECTION_WEST;//渐变方向 east-东 west-西 north-北 south-南this.style[mxConstants.STYLE_FONTFAMILY] = "consolas";//字体this.style[mxConstants.STYLE_FONTSTYLE] = 0;//1-加粗 2-斜体 4-下划线this.style[mxConstants.STYLE_HORIZONTAL] = 1;//1-水平 0-垂直this.style[mxConstants.STYLE_LABEL_POSITION] = "center";//文字居中 结合下面属性控制this.style[mxConstants.STYLE_VERTICAL_LABEL_POSITION] = "middle";//this.graph.getStylesheet().putDefaultVertexStyle(this.style);//put到全局style中
2.定义全局Edge、label样式
this.style = this.graph.getStylesheet().getDefaultEdgeStyle();
this.style['fontSize'] = this.fontSize;
this.style['verticalAlign'] = 'bottom';
this.style[mxConstants.STYLE_ROUNDED] = true;
this.style[mxConstants.STYLE_EDGE] = mxEdgeStyle.ElbowConnector;
this.style[mxConstants.STYLE_LABEL_BACKGROUNDCOLOR] = "white";//transparent 连线文字背景颜色
this.style[mxConstants.STYLE_ORTHOGONAL_LOOP] = 1;
this.style[mxConstants.STYLE_JETTY_SIZE] = "auto";
3.局部样式
let style = new Object();
style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_IMAGE;
style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;
style[mxConstants.STYLE_IMAGE] = '../../../static/img/star_200.png';
style[mxConstants.STYLE_FONTCOLOR] = 'black';
this.graph.getStylesheet().putCellStyle('image', style);//自定义背景style
this.graph.insertVertex(this.parent, null, 'star', x, y, 100, 100, 'image');//使用方式
4.修改全局Cell默认样式 Edge同理
let style =this.graph.getStylesheet().getDefaultVertexStyle();
style[mxConstants.STYLE_FONTCOLOR] =this.color;
5.设置单个或者多个Cell样式 Edge同理
this.graph.setCellStyles(mxConstants.STYLE_GRADIENT_DIRECTION,this.curDirGradient);//第一种方式this.graph.setCellStyles(mxConstants.STYLE_FILLCOLOR, "none", [vertex]);//第二种方式
6.复制
let selectionCells =this.graph.getSelectionCells();
mxClipboard.copy(this.graph, selectionCells);
7.粘贴
mxClipboard.paste(this.graph);
8.剪切
let selectionCells =this.graph.getSelectionCells();
mxClipboard.cut(this.graph, selectionCells);
9.放大
this.graph.zoomIn();
10.缩小
this.graph.zoomOut();
11.撤销与还原
初始化:
this.undoMng = new mxUndoManager();
let listener = (sender, evt) => {
this.undoMng.undoableEditHappened(evt.getProperty('edit'));
};
this.graph.getModel().addListener(mxEvent.UNDO, listener);
his.graph.getView().addListener(mxEvent.UNDO, listener);
撤销:
this.undoMng.undo();
还原:
this.undoMng.redo();
12.组合
let vertex =newmxCell(null,newmxGeometry(0, 0));
vertex.setVertex(true);
this.graph.groupCells(vertex, 0,this.graph.getSelectionCells());
13.分解
this.graph.ungroupCells(this.graph.getSelectionCells());
14.加载xml自定义图形
try {
let req = mxUtils.load(this.staticPath+'xml/basic.xml');//此处路径写成项目资源文件目录
let root = req.getDocumentElement();
let shape = root.firstChild;
while (shape != null) {
if (shape.nodeType == mxConstants.NODETYPE_ELEMENT) {
let name = shape.getAttribute('name');
this.basicItems.push(name);//存储读取的shape名称数组
mxStencilRegistry.addStencil(name, new mxStencil(shape));
}
shape = shape.nextSibling;
}
} catch (e) {
mxUtils.alert('Cannot load' + e);
}
使用方式:
let basic = document.getElementById("basic");
this.basicItems.forEach((name, index) => {
basic.append(this.createItem("", 45, 45, "shape=" + name));
});
createItem方法:
createItem(title, width, height, style) {
let vertex = new mxCell(null, new mxGeometry(0, 0, width, height), style);
vertex.setVertex(true);
let elt = document.createElement('div');
elt.className = 'el-col el-col-8 basic';
// elt.style.overflow = 'hidden';
// Blocks default click action
// mxEvent.addListener(elt, 'click', function(evt)
// {
// mxEvent.consume(evt);
// });
// this.graph.view.scaleAndTranslate(1, 0, 0);
this.graph.setCellStyles(mxConstants.STYLE_FILLCOLOR, "none", [vertex]);
this.graph.setCellStyles(mxConstants.STYLE_STROKEWIDTH, 3, [vertex]);
this.graph.setCellStyles(mxConstants.STYLE_STROKECOLOR, "#515151", [vertex]);
this.graph.setCellStyles(mxConstants.STYLE_SHADOW, false, [vertex]);
this.graph.setCellStyles(mxConstants.STYLE_ALIGN, mxConstants.ALIGN_CENTER, [vertex]);
this.graph.setCellStyles(mxConstants.STYLE_IMAGE_WIDTH, 48, [vertex]);
this.graph.setCellStyles(mxConstants.STYLE_IMAGE_HEIGHT, 48, [vertex]);
this.graph.addCell(vertex);
let node;
node = this.graph.view.getCanvas().ownerSVGElement.cloneNode(true);
this.graph.getModel().clear();
elt.appendChild(node);
return elt;
},//创建自定义html包裹的svg
15.一些坑
有些全局样式也可以直接修改,(不用像上面那样put)例如:
mxConstants.VERTEX_SELECTION_COLOR = "#29B6F2";
鼠标框选 不显示背景颜色
new mxRubberband(this.graph);
解决办法添加以下css
div.mxRubberband {
position: absolute;
overflow: hidden;
border-style: solid;
border-width: 1px;
border-color: #0000FF;
background: #3481D7;
}
加载xml自定义图形上面14点已完整说明。
暂时就介绍那么多,还有很多细节设置就下次再说了。
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