142 lines
3.3 KiB
JavaScript
142 lines
3.3 KiB
JavaScript
// 本文件由FirstUI授权予新疆天衡创新研究院有限公司（手机号： 1 86 14072 5 49，身份证尾号：5A07X5）专用，请尊重知识产权，勿私下传播，违者追究法律责任。
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// #ifdef MP
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export default {
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data() {
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return {
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context: null,
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start: 0
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}
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},
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watch: {
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percent(val) {
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setTimeout(() => {
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this.init();
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}, 50)
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},
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w(val) {
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setTimeout(() => {
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this.init();
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}, 50)
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},
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strokeWidth(val) {
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setTimeout(() => {
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this.init();
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}, 50)
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}
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},
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mounted() {
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this.$nextTick(() => {
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setTimeout(() => {
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this.init();
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}, 50)
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})
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},
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methods: {
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//初始化绘制
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init(init) {
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let start = this.activeMode === 'backwards' ? 0 : this.start;
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start = start > this.percent ? 0 : start;
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this.drawCircle(start);
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},
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//默认背景
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drawDefaultCircle(ctx) {
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let sw = Number(this.strokeWidth);
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// #ifdef MP-ALIPAY
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sw = sw * 4
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// #endif
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ctx.setLineWidth(sw);
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ctx.setStrokeStyle(this.background);
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let eAngle = Math.PI * 2 + Number(this.sAngle) * Math.PI;
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this.drawArc(ctx, eAngle, true);
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},
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drawCircle(start) {
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let ctx = this.context;
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if (!ctx) {
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ctx = uni.createCanvasContext(this.circleId, this);
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this.context = ctx;
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}
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//绘制默认背景
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this.defaultShow && this.drawDefaultCircle(ctx)
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let sw = Number(this.strokeWidth)
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// #ifdef MP-ALIPAY
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sw = sw * 4
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// #endif
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ctx.setLineWidth(sw);
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let gradient = this.foreground || this.primaryColor;
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// #ifndef MP-KUAISHOU
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if (this.gradient) {
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gradient = ctx.createLinearGradient(0, 0, Number(this.w), 0);
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gradient.addColorStop(0, this.gradient);
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gradient.addColorStop(1, this.foreground || this.primaryColor);
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}
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// #endif
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ctx.setStrokeStyle(gradient);
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let percentage = Number(this.percent)
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if (percentage > 0) {
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start += Number(this.speed);
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start = start > percentage ? percentage : start;
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}
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if (this.show) {
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let si = Number(this.size)
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// #ifdef MP-ALIPAY
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si = si * 4
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// #endif
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ctx.setFontSize(si);
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ctx.setFillStyle(this.color || this.primaryColor);
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ctx.setTextAlign('center');
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ctx.setTextBaseline('middle');
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let percent = `${this.counterclockwise ? 100 - start : start}%`;
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let radius = this.w / 2
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// #ifdef MP-ALIPAY
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radius = radius * 4
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// #endif
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ctx.fillText(percent, radius, radius);
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}
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if (percentage == 0 || (this.counterclockwise && start == 100)) {
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ctx.draw();
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} else {
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let eAngle = ((2 * Math.PI) / 100) * start + Number(this.sAngle) * Math.PI;
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this.drawArc(ctx, eAngle);
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}
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let time = 1000 / 60
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// #ifdef MP-ALIPAY
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time = time / 2
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// #endif
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setTimeout(() => {
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this.start = start;
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if (start == percentage) {
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this.$emit('end', {
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canvasId: this.circleId,
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percent: start
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});
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} else {
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this.drawCircle(start);
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}
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this.$emit('change', {
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percent: start
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});
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}, time);
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},
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//创建弧线
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drawArc(ctx, eAngle, def) {
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ctx.setLineCap(this.lineCap);
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ctx.beginPath();
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let radius = this.w / 2;
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let sw = Number(this.strokeWidth);
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// #ifdef MP-ALIPAY
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radius = radius * 4
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sw = sw * 4
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// #endif
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ctx.arc(radius, radius, radius - sw, Number(this.sAngle) * Math.PI, eAngle, this.counterclockwise);
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ctx.stroke();
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!def && ctx.draw();
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}
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}
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}
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// #endif
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// #ifndef MP
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export default {}
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// #endif
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