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Fix position and visibility issues of the seekbar preview

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This commit is contained in:
Bnyro 2023-04-22 11:32:06 +02:00
parent 4a33f57c1a
commit ba36d4b0da
1 changed files with 10 additions and 3 deletions
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13
src/components/VideoPlayer.vue
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@ -64,6 +64,7 @@ export default {
initialSeekComplete: false,
destroying: false,
inSegment: false,
isHoveringTimebar: false,
};
},
computed: {
@ -718,11 +719,13 @@ export default {
let seekBar = document.querySelector(".shaka-seek-bar");
// load the thumbnail preview when the user moves over the seekbar
seekBar.addEventListener("mousemove", e => {
this.isHoveringTimebar = true;
const position = (e.offsetX / e.target.offsetWidth) * this.video.duration;
this.showSeekbarPreview(position * 1000);
});
// hide the preview when the user stops hovering the seekbar
seekBar.addEventListener("mouseout", () => {
this.isHoveringTimebar = false;
let canvas = document.querySelector("#preview");
canvas.style.display = "none";
});
@ -730,7 +733,9 @@ export default {
async showSeekbarPreview(position) {
let frame = this.getFrame(position);
let originalImage = await this.loadImage(frame.url);
let seekBar = document.querySelector(".shaka-seek-bar-container");
if (!this.isHoveringTimebar) return;
let seekBar = document.querySelector(".shaka-seek-bar");
let canvas = document.querySelector("#preview");
let ctx = canvas.getContext("2d");
@ -746,9 +751,11 @@ export default {
ctx.drawImage(originalImage, offsetX, offsetY, newWidth, newHeight, 0, 0, canvas.width, canvas.height);
// calculate the thumbnail preview offset and display it
const seekbarPadding = 2; // percentage of seekbar padding
const centerOffset = position / this.video.duration / 10;
const left = centerOffset - (canvas.width / seekBar.clientWidth / 1.3) * 100;
canvas.style.left = `max(2%, min(${left}%, 90%))`;
const left = centerOffset - ((0.5 * canvas.width) / seekBar.clientWidth) * 100;
const maxLeft = ((seekBar.clientWidth - canvas.clientWidth) / seekBar.clientWidth) * 100 - seekbarPadding;
canvas.style.left = `max(${seekbarPadding}%, min(${left}%, ${maxLeft}%))`;
canvas.style.display = "block";
},
// ineffective algorithm to find the thumbnail corresponding to the currently hovered position in the video