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| /**
| * 边动画合集
| */
|
| const ball = {
| run (group) {
| // 获得当前边的第1个图形，这里是边本身的 path
| const path = group.get('children')[0];
| const endArrowShape = path.get('endArrowShape');
| const arrowSize = endArrowShape ? (endArrowShape.get('bbox') ? Math.max(endArrowShape.get('bbox').width, endArrowShape.get('bbox').height) : 0) : 0;
| const startPoint = path.getPoint(0);
| const length = path.getTotalLength();
| const num = Math.floor(length / 100) || 1;
|
| if (length <= 40) return; // 线段太短就不要动画了
|
| for (let i = 0; i < num; i++) {
| const timeout = setTimeout(() => {
| const circle = group.addShape('circle', {
| attrs: {
| x: startPoint.x,
| y: startPoint.y,
| fill: '#1890ff',
| r: 2,
| },
| className: 'edge-runner',
| name: 'edge-runner',
| });
|
| circle.animate(
| ratio => {
| const tmpPoint = path.getPoint(ratio);
| const opacity = length - length * ratio >= arrowSize ? 1 : 0;
|
| // ! 必须设置这个属性为false, 否则当起始位置落在画布外时将无法播放动画
| circle.set('hasChanged', false);
|
| // 返回需要变化的参数集，这里返回了位置 x 和 y
| return {
| ...tmpPoint,
| opacity,
| };
| },
| {
| duration: length >= 100 ? length * 3 : length * 5,
| repeat: true,
| },
| );
| }, i * length);
|
| group.runners.push(timeout);
| }
| },
| stop (group) {
| const runners = [];
|
| group.get('children').forEach(child => {
| if (child.get('className') === 'edge-runner') {
| child.stopAnimate();
| runners.push(child);
| }
| });
|
| runners.forEach(runner => runner.remove());
| // 清除所有定时器
| group.runners.forEach(settimeout => {
| clearTimeout(settimeout);
| });
| group.running = false;
| },
| };
|
| const dash = {
| run (group) {
| let index = 0;
| // 获得当前边的第1个图形，这里是边本身的 path
| const path = group.get('children')[0];
| const dashLine = group.addShape('path', {
| attrs: {
| offset: path.attrs.offset,
| path: path.attrs.path,
| stroke: '#fff',
| startArrow: false,
| endArrow: false,
| },
| name: 'edge-dash',
| });
|
| dashLine.animate(
| radio => {
| index++;
| if (index > 9) {
| index = 0;
| }
| return {
| lineDash: [2, 1, 2, 4],
| lineDashOffset: -index,
| };
| },
| {
| repeat: true,
| duration: 3000,
| },
| );
| },
| stop (group) {
| // 获得当前边的第1个图形，这里是边本身的 path
| const path = group.get('children').find(item => item.cfg.name === 'edge-dash');
|
| if (path) {
| path.remove();
| group.running = false;
| }
| },
| };
|
| export default {
| ball,
| dash,
| };
|
|
