原文链接及内容
使用GIF动画作为图标的例子，动画是使用Gifler库实现的。参考文档：https://themadcreator.github.io/gifler/docs.html 。
main.js代码如下：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
| import Feature from 'ol/Feature.js';
import Map from 'ol/Map.js';
import Point from 'ol/geom/Point.js';
import View from 'ol/View.js';
import {Icon, Style} from 'ol/style.js';
import {Stamen, Vector as VectorSource} from 'ol/source.js';
import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer.js';
const iconFeature = new Feature({
geometry: new Point([0, 0]),
});
const vectorSource = new VectorSource({
features: [iconFeature],
});
const vectorLayer = new VectorLayer({
source: vectorSource,
});
const rasterLayer = new TileLayer({
source: new Stamen({
layer: 'toner',
}),
});
const map = new Map({
layers: [rasterLayer, vectorLayer],
target: document.getElementById('map'),
view: new View({
center: [0, 0],
zoom: 2,
}),
});
const gifUrl = 'data/globe.gif';
const gif = gifler(gifUrl);
gif.frames(
document.createElement('canvas'),
function (ctx, frame) {
if (!iconFeature.getStyle()) {
iconFeature.setStyle(
new Style({
image: new Icon({
img: ctx.canvas,
imgSize: [frame.width, frame.height],
opacity: 0.8,
}),
})
);
}
ctx.clearRect(0, 0, frame.width, frame.height);
ctx.drawImage(frame.buffer, frame.x, frame.y);
map.render();
},
true
);
map.on('pointermove', function (e) {
const pixel = map.getEventPixel(e.originalEvent);
const hit = map.hasFeatureAtPixel(pixel);
map.getTarget().style.cursor = hit ? 'pointer' : '';
});
|
界面布局文件index.html代码如下：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Animated GIF</title>
<link rel="stylesheet" href="node_modules/ol/ol.css">
<style>
.map {
width: 100%;
height: 400px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<script src="https://cdn.jsdelivr.net/npm/elm-pep@1.0.6/dist/elm-pep.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gifler@0.1.0/gifler.min.js"></script>
<script type="module" src="main.js"></script>
</body>
</html>
|
Vue版本代码：以下代码没有打包测试，由于gifler库不支持es6，所以需要做兼容处理。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
| <template>
<div class="oneMap">
<TdtMap @mapCreated="mapCreated" />
</div>
</template>
<script setup>
import Feature from "ol/Feature.js";
import Point from "ol/geom/Point.js";
import VectorLayer from "ol/layer/Vector.js";
import VectorSource from "ol/source/Vector.js";
import Icon from "ol/style/Icon.js";
import Style from "ol/style/Style.js";
let map, gifler;
const iconFeature = new Feature({
geometry: new Point([0, 0]),
});
const vectorSource = new VectorSource({
features: [iconFeature],
});
const vectorLayer = new VectorLayer({
source: vectorSource,
});
async function mapCreated(m) {
map = m;
map.addLayer(vectorLayer);
gifler = (await import("gifler")).default || window.gifler;
const gif = gifler("data/globe.gif");
gif.frames(
document.createElement("canvas"),
function (ctx, frame) {
if (!iconFeature.getStyle()) {
iconFeature.setStyle(
new Style({
image: new Icon({
img: ctx.canvas,
opacity: 0.8,
}),
})
);
}
ctx.clearRect(0, 0, frame.width, frame.height);
ctx.drawImage(frame.buffer, frame.x, frame.y);
map.render();
},
true
);
map.on("pointermove", function (e) {
const hit = map.hasFeatureAtPixel(e.pixel);
map.getTargetElement().style.cursor = hit ? "pointer" : "";
});
}
</script>
<style lang="scss" scoped>
.oneMap {
position: relative;
height: 100%;
overflow: hidden;
}
</style>
|
)
