147 lines
3.8 KiB
JavaScript
147 lines
3.8 KiB
JavaScript
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SV.registerLayout('BinaryTree', {
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defineOptions() {
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return {
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element: {
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default: {
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type: 'binary-tree-node',
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size: [60, 30],
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label: '[data]',
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style: {
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fill: '#b83b5e',
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stroke: "#333",
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cursor: 'pointer'
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}
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}
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},
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link: {
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child: {
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type: 'line',
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sourceAnchor: index => index === 0? 3: 1,
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targetAnchor: 0,
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style: {
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stroke: '#333',
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lineAppendWidth: 6,
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cursor: 'pointer',
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endArrow: 'default',
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startArrow: {
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path: G6.Arrow.circle(2, -1),
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fill: '#333'
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}
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}
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}
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},
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pointer: {
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external: {
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anchor: 0,
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offset: 14,
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style: {
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fill: '#f08a5d'
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},
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labelOptions: {
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style: {
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fill: '#000099'
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}
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}
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}
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},
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layout: {
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xInterval: 40,
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yInterval: 40
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},
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behavior: {
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// dragNode: false
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}
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};
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},
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/**
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* 对子树进行递归布局
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*/
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layoutItem(node, parent, index, layoutOptions) {
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// 次双亲不进行布局
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if(!node) {
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return null;
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}
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let bound = node.getBound(),
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width = bound.width,
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height = bound.height,
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group = new Group(node);
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if(parent) {
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node.set('y', parent.get('y') + layoutOptions.yInterval + height);
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// 左节点
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if(index === 0) {
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node.set('x', parent.get('x') - layoutOptions.xInterval / 2 - width / 2);
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}
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// 右结点
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if(index === 1) {
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node.set('x', parent.get('x') + layoutOptions.xInterval / 2 + width / 2);
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}
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}
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if(node.child && (node.child[0] || node.child[1])) {
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let leftChild = node.child[0],
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rightChild = node.child[1],
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leftGroup = this.layoutItem(leftChild, node, 0, layoutOptions),
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rightGroup = this.layoutItem(rightChild, node, 1, layoutOptions),
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intersection = null,
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move = 0;
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// 处理左右子树相交问题
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if(leftGroup && rightGroup) {
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intersection = Bound.intersect(leftGroup.getBound(), rightGroup.getBound());
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move = 0;
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if(intersection && intersection.width > 0) {
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move = (intersection.width + layoutOptions.xInterval) / 2;
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leftGroup.translate(-move, 0);
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rightGroup.translate(move, 0);
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}
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}
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if(leftGroup) {
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group.add(leftGroup);
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}
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if(rightGroup) {
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group.add(rightGroup)
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}
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}
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return group;
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},
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/**
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* 布局函数
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* @param {*} elements
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* @param {*} layoutOptions
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*/
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layout(elements, layoutOptions) {
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let root = elements[0];
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this.layoutItem(root, null, -1, layoutOptions);
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}
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});
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[
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{
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"id": 6385328,
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"data": "",
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"external": [
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"L"
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],
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"root": true,
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"after": null,
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"next": null
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}
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]
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