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Glenn Vorhes authoredGlenn Vorhes authored
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olHelpers_layerSwipe.js.html 8.20 KiB
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<h1 class="page-title">Source: olHelpers/layerSwipe.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* Created by gavorhes on 6/1/2016.
*/
import provide from '../util/provide';
import $ from '../jquery/jquery';
let nm = provide('collections.layerSwipe');
class LayerSwipe {
/**
*
* @param {ol.Map} map - the map
* @param {string} [sliderContent=''] - additional html to be added inside the slider div
*/
constructor(map, sliderContent) {
sliderContent = sliderContent || '';
/**
*
* @type {Array<LayerBase>}
*/
this.leftLayers = [];
/**
*
* @type {Array<LayerBase>}
*/
this.rightLayers = [];
this._percentRight = 50;
this.offset = null;
this._map = map;
this.$mapElement = $(map.getTargetElement());
this.$mapElement.append(`<div class="layer-swiper">${sliderContent}</div>`);
this.$swiper = this.$mapElement.find('.layer-swiper'); this.percentRight = this.percentRight;
this.dragging = false;
this.$mapElement.mouseleave(() => {
this.dragging = false;
});
this.$swiper.bind('mousewheel DOMMouseScroll', function(evt){
evt.preventDefault();
});
this.$swiper.mousedown((evt) => {
this.dragging = true;
this.offset = evt.offsetX;
});
$(window).mouseup(() => {
this.dragging = false;
});
this.$mapElement.mousemove((evt) => {
if (this.dragging) {
let mapLeft = this.$mapElement.position().left;
let mapWidth = this.$mapElement.width();
this.percentRight = 100 * (evt.pageX - this.offset - mapLeft) / mapWidth;
}
});
}
/**
*
* @param {LayerBase|*} lyr - layer to be added to left side
*/
addLeftLayer(lyr) {
if (this.leftLayers.indexOf(lyr) != -1){
return;
}
lyr.olLayer.on('precompose', (event) => {
let ctx = event.context;
let width = ctx.canvas.width * (this.percentRight / 100);
ctx.save();
ctx.beginPath();
ctx.rect(0, 0, width, ctx.canvas.height);
ctx.clip();
});
lyr.olLayer.on('postcompose', function (event) {
let ctx = event.context;
ctx.restore();
});
this.leftLayers.push(lyr);
}
/**
*
* @param {LayerBase|*} lyr - layer to be added to right side
*/
addRightLayer(lyr) {
if (this.rightLayers.indexOf(lyr) != -1){
return;
}
lyr.olLayer.on('precompose', (event) => {
let ctx = event.context;
let width = ctx.canvas.width * (this.percentRight / 100);
ctx.save();
ctx.beginPath();
ctx.rect(width, 0, ctx.canvas.width - width, ctx.canvas.height);
ctx.clip();
});
lyr.olLayer.on('postcompose', function (event) {
let ctx = event.context;
ctx.restore();
});
this.rightLayers.push(lyr);
}
get percentRight() {
return this._percentRight;
}
set percentRight(pcnt) {
let maxed = this.$swiper.position().left + this.$swiper.width() > this.$mapElement.width();
if (pcnt < 0) {
return;
} else if (maxed && pcnt > this.percentRight) {
return;
}
this._percentRight = pcnt;
this.$swiper.css('left', `${this._percentRight.toFixed(2)}%`);
this._map.render();
}
}
nm.LayerSwipe = LayerSwipe;
export default LayerSwipe;
</code></pre>
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