90 lines
1.8 KiB
JavaScript
90 lines
1.8 KiB
JavaScript
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import {createTransform, createBoundingRect} from './utils/parser';
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class TransformHandle {
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constructor(painter) {
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this.$painter = painter;
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this.parentLevel = painter.getParentLevel();
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this.rect = { x: 0, y: 0, width: 0, height: 0 };
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this.transform = createTransform({ scaleRate: 1, offsetX: 0, offsetY: 0 });
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}
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checkVisible(view) {
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return createBoundingRect(view).intersect(this.rect);
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}
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revisibleView(view) {
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if (this.checkVisible(view)) {
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view.show();
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} else {
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view.hide();
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}
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view.dirty();
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}
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// 视图进行缩放/平移
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transformView(view) {
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if (view) {
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view.transform = this.transform;
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view.decomposeTransform();
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this.revisibleView(view);
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}
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}
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// 处理所有视图缩放/平移
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transformAll() {
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this.traverse(this.transformView, this);
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}
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// 重新计算显示图形
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revisibleAll() {
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this.traverse(this.revisibleView, this);
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}
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// 更新偏移量
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updateTransform(opts) {
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const elRect = this.parentLevel.getBoundingRect();
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const zrRect = this.rect;
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if (elRect.x - opts.offsetX > 0) {
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opts.offsetX = -elRect.x;
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}
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if (elRect.y - opts.offsetY > 0) {
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opts.offsetY = -elRect.y;
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}
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if (elRect.x + elRect.width < zrRect.width) {
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opts.offsetX -= zrRect.width - (elRect.x + elRect.width);
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}
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if (elRect.y + elRect.height < zrRect.height) {
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opts.offsetY -= zrRect.height - (elRect.y + elRect.height);
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}
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this.transform = createTransform(opts);
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this.transformAll();
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}
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// 更新画布尺寸
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updateZrSize(opts) {
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this.rect = { x: 0, y: 0, width: opts.width, height: opts.height };
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this.revisibleAll();
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}
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// 遍历group执行回调
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traverse(cb, context) {
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this.parentLevel.eachChild(level => {
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level.eachChild((view) => {
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cb.call(context, view);
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}, context);
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}, context);
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}
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}
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export default TransformHandle;
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