4b045f7c
 刘淇
江阴初始化项目
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<template>
<canvas v-if="canvasId" class="ec-canvas" :id="canvasId" :canvasId="canvasId" @touchstart="touchStart" @touchmove="touchMove" @touchend="touchEnd" @error="error"></canvas>
</template>
<script>
import WxCanvas from './wx-canvas';
export default {
props: {
canvasId: {
type: String,
default: 'ec-canvas'
},
lazyLoad: {
type: Boolean,
default: false
},
disableTouch: {
type: Boolean,
default: false
},
throttleTouch: {
type: Boolean,
default: false
}
},
// #ifdef H5
mounted() {
if (!this.lazyLoad) this.init();
},
// #endif
// #ifndef H5
onReady() {
if (!this.lazyLoad) this.init();
},
// #endif
methods: {
setChart(chart){
this.chart = chart
},
init() {
const { canvasId } = this;
this.ctx = wx.createCanvasContext(canvasId, this);
this.canvas = new WxCanvas(this.ctx, canvasId);
const query = wx.createSelectorQuery().in(this);
query
.select(`#${canvasId}`)
.boundingClientRect(res => {
if (!res) {
setTimeout(() => this.init(), 50);
return;
}
this.$emit('onInit', {
width: res.width,
height: res.height
});
})
.exec();
},
canvasToTempFilePath(opt) {
const { canvasId } = this;
this.ctx.draw(true, () => {
wx.canvasToTempFilePath({
canvasId,
...opt
});
});
},
touchStart(e) {
const { disableTouch, chart } = this;
if (disableTouch || !chart || !e.mp.touches.length) return;
const touch = e.mp.touches[0];
chart._zr.handler.dispatch('mousedown', {
zrX: touch.x,
zrY: touch.y
});
chart._zr.handler.dispatch('mousemove', {
zrX: touch.x,
zrY: touch.y
});
},
touchMove(e) {
const { disableTouch, throttleTouch, chart, lastMoveTime } = this;
if (disableTouch || !chart || !e.mp.touches.length) return;
if (throttleTouch) {
const currMoveTime = Date.now();
if (currMoveTime - lastMoveTime < 240) return;
this.lastMoveTime = currMoveTime;
}
const touch = e.mp.touches[0];
chart._zr.handler.dispatch('mousemove', {
zrX: touch.x,
zrY: touch.y
});
},
touchEnd(e) {
const { disableTouch, chart } = this;
if (disableTouch || !chart) return;
const touch = e.mp.changedTouches ? e.mp.changedTouches[0] : {};
chart._zr.handler.dispatch('mouseup', {
zrX: touch.x,
zrY: touch.y
});
chart._zr.handler.dispatch('click', {
zrX: touch.x,
zrY: touch.y
});
}
}
};
</script>
<style scoped>
.ec-canvas {
width: 100%;
height: 100%;
flex: 1;
}
</style>
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