91 lines
2.9 KiB
JavaScript
91 lines
2.9 KiB
JavaScript
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class Options {
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constructor(opts) {
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this.scaleIndex = 0;
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this.scaleList = [
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0.1, 0.2, 0.4, 0.6, 0.8,
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1, 1.2, 1.4, 1.6, 1.8,
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2, 2.2, 2.4, 2.6, 2.8,
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3, 3.2, 3.4, 3.6, 3.8,
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4, 4.2, 4.4, 4.6, 4.8,
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5, 5.2, 5.4, 5.6, 5.8,
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6, 6.2, 6.4, 6.6, 6.8,
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7, 7.2, 7.4, 7.6, 7.8,
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8, 8.2, 8.4, 8.6, 8.8,
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]
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if (Number.isFinite(opts.scaleRate)) {
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let idx = this.scaleList.indexOf(opts.scaleRate);
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if (idx >= 0) {
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this.scaleIndex = idx;
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}
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}
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this.scaleRate = opts.scaleRate || this.scaleList[this.scaleIndex]; // 缩放比例
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this.offsetX = opts.offsetX || 0; // x偏移
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this.offsetY = opts.offsetY || 0; // y偏移
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this.throttle = opts.throttle || 100; // 刷新频率
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this.disabled = false; //是否禁用
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this.moveOnMouseMove = true;
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this.zoomOnMouseWheel = false;
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this.preventDefaultMouseMove = true;
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}
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update(payload) {
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payload = payload || {};
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if (Number.isFinite(payload.dx)) {
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this.offsetX -= payload.dx;
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}
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if (Number.isFinite(payload.dy)) {
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this.offsetY -= payload.dy;
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}
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if (Number.isFinite(payload.offsetX)) {
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this.offsetX = payload.offsetX;
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}
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if (Number.isFinite(payload.offsetY)) {
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this.offsetY = payload.offsetY;
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}
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if (Number.isFinite(payload.scale)) {
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if (Number.isFinite(payload.scale)) {
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if (this.scaleIndex + payload.scale >= 0 && this.scaleIndex + payload.scale < this.scaleList.length) {
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this.scaleIndex = this.scaleIndex + payload.scale;
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}
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}
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this.scaleRate = this.scaleList[this.scaleIndex];
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}
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if (Number.isFinite(payload.scaleRate)) {
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let idx = this.scaleList.indexOf(payload.scaleRate);
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if (idx < 0) {
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return;
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}
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this.scaleIndex = idx;
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this.scaleRate = payload.scaleRate;
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}
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if (payload.disabled === true || payload.disabled === false) {
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this.disabled = payload.disabled;
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}
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if (payload.moveOnMouseMove === true || payload.moveOnMouseMove === false) {
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this.moveOnMouseMove = payload.moveOnMouseMove;
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}
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if (payload.zoomOnMouseWheel === true || payload.zoomOnMouseWheel === false) {
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this.zoomOnMouseWheel = payload.zoomOnMouseWheel;
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}
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}
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getScaleRate(scale) {
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if (Number.isFinite(scale)) {
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if (this.scaleIndex + scale >= 0 && this.scaleIndex + scale < this.scaleList.length) {
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return this.scaleList[this.scaleIndex + scale];
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}
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}
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return this.scaleList[this.scaleIndex];
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}
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}
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export default Options;
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