概述
一、树的展示
展示效果：
代码：
export default class indexTree extends Component {
static propTypes = {};
constructor(props) {
super(props);
this.diagramRef = React.createRef();
this.state = {
nodeDataArray: [
{ key: 1, text: 'No flow to receiver', figure: 'None' },
{
key: 2,
text: 'No flow from Component B',
parent: 1,
figure: 'OrGate',
choice: 'G02'
},
{
key: 3,
text: 'No flow into Component B',
parent: 2,
figure: 'AndGate',
choice: 'G03'
},
{
key: 4,
text: 'Component B blocks flow',
parent: 2,
figure: 'Circle',
choice: 'B01'
},
{
key: 5,
text: 'No flow from Component A1',
parent: 3,
figure: 'OrGate',
choice: 'G04'
},
{
key: 6,
text: 'No flow from Component A2',
parent: 3,
figure: 'OrGate',
choice: 'G05'
},
{
key: 7,
text: 'No flow from source1',
parent: 5,
figure: 'Triangle',
choice: 'T01'
},
{
key: 8,
text: 'Component A1 blocks flow',
parent: 5,
figure: 'Circle',
fill: 'green',
choice: 'B02'
},
{
key: 9,
text: 'No flow from source2',
parent: 6,
figure: 'Triangle',
choice: 'T02'
},
{
key: 10,
text: 'Component A2 blocks flow',
parent: 6,
figure: 'Circle',
choice: 'B03'
}
]
};
}
componentDidMount() {}
initDiagram() {
const $ = go.GraphObject.make;
// 1、初始化画布
const diagram = $(go.Diagram, {
allowCopy: false,
allowDelete: false,
'draggingTool.dragsTree': true,
'undoManager.isEnabled': true
});
diagram.layout = $(go.TreeLayout, {
angle: 90,
layerSpacing: 30
});
diagram.model = $(go.TreeModel, {
// linkKeyProperty: 'key' // 使用GraphLinksModel时应始终设置此项
});
diagram.addDiagramListener('ObjectSingleClicked', function (e) {
console.log(e);
console.log(e.subject);
console.log(e.parameter);
});
// 树折叠事件
diagram.addDiagramListener('TreeCollapsed', function (e) {
// console.log(e);
// console.log('折叠');
});
// 树展开事件
diagram.addDiagramListener('TreeExpanded', function (e) {
// console.log(e);
// console.log('展开');
});
// 面板的颜色
function nodeFillConverter(figure) {
switch (figure) {
case 'AndGate':
// right to left so when it's rotated, it goes from top to bottom
return $(go.Brush, 'Linear', {
0: '#EA8100',
1: '#C66D00',
start: go.Spot.Right,
end: go.Spot.Left
});
case 'OrGate':
return $(go.Brush, 'Linear', {
0: '#0058D3',
1: '#004FB7',
start: go.Spot.Right,
end: go.Spot.Left
});
case 'Circle':
return $(go.Brush, 'Linear', {
0: '#009620',
1: '#007717'
});
case 'Triangle':
return $(go.Brush, 'Linear', {
0: '#7A0099',
1: '#63007F'
});
case 'Diamond':
return $(go.Brush, 'Linear', {
0: '#fff',
1: '#fff'
});
default:
return 'whitesmoke';
}
}
/**
* 边框样式设置
* @param {type} 判断是测点还是指标
*/
function borderStroke(type) {
switch (type) {
case 'cd':
return '#8EDA87';
case 'zb':
return borderColor;
default:
return borderColor;
}
}
// 2、定义node模型
diagram.nodeTemplate = $(
go.Node,
'Spot', // 形状将围绕TextBlock
{
selectionObjectName: 'BODY',
locationSpot: go.Spot.Center,
locationObjectName: 'BODY',
//movable: false, //禁止拖动
deletable: false //禁止删除
},
$(
go.Panel,
'Auto',
{
name: 'BODY',
portId: ''
},
$(
go.Shape,
'RoundedRectangle',
{
// 面板样式
fill: $(go.Brush, 'Linear', {
0: '#fff',
1: '#fff'
})
//stroke: borderColor
},
new go.Binding('type'),
new go.Binding('stroke', 'type', borderStroke) // 内容的颜色
),
$(
go.TextBlock,
{
// 字体样式
margin: new go.Margin(5, 10, 5, 10),
maxSize: new go.Size(100, NaN), // 字体大小
stroke: 'rgba(0, 0, 0, .90)', // 字体颜色
font: '10pt Segoe UI, sans-serif'
},
new go.Binding('text')
),
{
click: function (e, node) {
// 双击事件
console.log(node);
}
}
),
// 线
$(
go.Shape,
'LineV',
new go.Binding('visible', 'figure', function (f) {
return f !== 'None';
}),
{
strokeWidth: strokeWidth,
height: 30, // 底部的线的高度
alignment: new go.Spot(0.5, 1, 0, 17), // x, y, offx, offy
alignmentFocus: go.Spot.Center,
stroke: borderColor // 边框的颜色
}
),
// 边框
$(
go.Shape,
new go.Binding('visible', 'figure', function (f) {
return f !== 'None';
}),
{
alignment: new go.Spot(0.5, 1, 0, 30), // x, y, offx, offy
alignmentFocus: go.Spot.Top,
width: 40,
height: 30,
stroke: borderColor // 边框的颜色
},
new go.Binding('figure'),
new go.Binding('fill', 'figure', nodeFillConverter), // 内容的颜色
new go.Binding('angle', 'figure', function (f) {
// 旋转角度
return f === 'OrGate' || f === 'AndGate' ? -90 : 0;
})
),
$(
go.TextBlock,
new go.Binding('visible', 'figure', function (f) {
return f !== 'None';
}), // if we don't have a figure, don't display any choice text
{
alignment: new go.Spot(0.5, 1, 25, 45),
alignmentFocus: go.Spot.Left,
stroke: 'black',
font: '10pt Segoe UI, sans-serif'
},
new go.Binding('text', 'choice')
),
$(
'TreeExpanderButton',
{
alignment: new go.Spot(0.5, 1, 0, 0),
alignmentFocus: go.Spot.Top,
'ButtonBorder.figure': 'Rectangle'
},
new go.Binding('fill', '#fff')
)
);
diagram.linkTemplate = $(
go.Link,
{
routing: go.Link.Orthogonal, // may be either Orthogonal or AvoidsNodes
curve: go.Link.JumpOver
},
{
layerName: 'Background',
curviness: 20,
corner: 5
},
$(go.Shape, {
strokeWidth: strokeWidth,
stroke: borderColor // 边框的颜色
}),
$(go.Shape, {
toArrow: 'Standard', // 箭头
stroke: borderColor, // 边框的颜色
fill: $(go.Brush, 'Linear', {
// 填充色
0: borderColor,
1: borderColor
})
})
);
return diagram;
}
onModelChange = (obj) => {
const insertedNodeKeys = obj.insertedNodeKeys; //新增的节点
const modifiedNodeData = obj.modifiedNodeData; //改变的节点
const removedNodeKeys = obj.removedNodeKeys; //删除的节点
const insertedLinkKeys = obj.insertedLinkKeys; //新增的连线
const modifiedLinkData = obj.modifiedLinkData; //改变的连线
const removedLinkKeys = obj.removedLinkKeys; //删除的连线
const modifiedModelData = obj.modelData;
};
render() {
return (
<div>
<ReactDiagram
initDiagram={this.initDiagram}
divClassName="diagram-component"
nodeDataArray={this.state.nodeDataArray}
onModelChange={this.onModelChange}
/>{' '}
</div>
);
}
}
二、实现点击节点，实现扩展收缩的功能
官方文档上有例子实现了此功能，根据这个例子做的更改：决策树图案例。但是里面的收缩方法有问题，每次只能收缩一个子节点，需要一个个的点击，主要的问题出在了递归调用这里：
解决方案1：
var node = port.part;
node.diagram.startTransaction('expand/collapse');
var portid = port.portId;
if (
node.findLinksOutOf(portid).first() &&
node.findLinksOutOf(portid).first().visible
) {
// 递归折叠整个子树
collapseTree(node, portid);
} else {
node.findLinksOutOf(portid).each(function (l) {
if (!l.visible) {
// 只扩展直接子级及其链接
l.visible = true;
var n = l.getOtherNode(node);
if (n !== null) {
n.location = node.getDocumentPoint(go.Spot.TopRight);
n.visible = true;
}
}
});
}
添加了判断，判断第一条数据是否存在，存在的时候判断visible的值，如果是true的话就收缩，如果是false的话就展开。
解决方案2：
let bool = true;
node.findLinksOutOf(portid).each(function (l) {
if (bool) {
if (l.visible) {
// 递归折叠整个子树
collapseTree(node, portid);
bool = false;
} else {
// console.log('扩展');
// 只扩展直接子级及其链接
l.visible = true;
var n = l.getOtherNode(node);
if (n !== null) {
n.location = node.getDocumentPoint(go.Spot.TopRight);
n.visible = true;
}
}
}
});
添加了一个bool值，约束其收缩的时候，只执行一次；
使用的时候：
（1）可以绑定点击事件
diagram.addDiagramListener('ObjectSingleClicked', function (e) {
const port = e.port; .// port应该是从e对象中取
buttonExpandCollapse(e, port);
});
（2）可以在Panel里面使用click方法：
$(
go.Panel,
'Auto',
{
name: 'BODY',
portId: ''
},
$(
go.Shape,
'RoundedRectangle',
{
// 面板样式
fill: $(go.Brush, 'Linear', {
0: '#fff',
1: '#fff'
})
//stroke: borderColor
},
new go.Binding('type'),
new go.Binding('stroke', 'type', borderStroke) // 内容的颜色
),
$(
go.TextBlock,
{
// 字体样式
margin: new go.Margin(5, 10, 5, 10),
maxSize: new go.Size(100, NaN), // 字体大小
stroke: 'rgba(0, 0, 0, .90)', // 字体颜色
font: '10pt Segoe UI, sans-serif'
},
new go.Binding('text')
),
{
click: function (e, node) {
// 点击事件
buttonExpandCollapse(e, node);
}
}
),
最后
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