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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| const parser = new DOMParser(); | ||
|
|
||
| let legendContainer = document.getElementById("legend-popup"); | ||
| let legendContent = document.getElementById("legend-popup-content"); | ||
|
|
||
| let layers = [ | ||
| new ol.layer.Tile({ | ||
| source: new ol.source.OSM() | ||
| }), | ||
| new ol.layer.Tile({ | ||
| source: new ol.source.TileWMS({ | ||
| format: 'image/png', | ||
| url: 'https://geo.weather.gc.ca/geomet-climate', | ||
| params: { 'LAYERS': 'CanDCSU6-SSP585_AirTempAnomaly-Pct50_2071-2100_P0Y', 'TILED': true }, | ||
| crossOrigin: 'Anonymous' | ||
| }) | ||
| }), | ||
| ] | ||
|
|
||
| // **************************** Add legend button control ************************************** | ||
| class LegendSwitchControl extends ol.control.Control { | ||
|
|
||
| constructor(opt_options) { | ||
| const options = opt_options || {}; | ||
|
|
||
| const button = document.createElement('button'); | ||
| button.innerHTML = '<i class="fa fa-paint-brush"></i>'; | ||
|
|
||
| const element = document.createElement('div'); | ||
| element.className = 'legend-switch ol-unselectable ol-control'; | ||
| element.appendChild(button); | ||
|
|
||
| super({ | ||
| element: element, | ||
| target: options.target, | ||
| }); | ||
| button.addEventListener('click', this.handleLegendSwitch.bind(this), false); | ||
| } | ||
|
|
||
| handleLegendSwitch() { | ||
| legendContainer.hidden = !legendContainer.hidden; | ||
| } | ||
| } | ||
|
|
||
| // **************************** Add legend button control end *********************************** | ||
|
|
||
| let map = new ol.Map({ | ||
| controls: ol.control.defaults.defaults().extend([new LegendSwitchControl(), new ol.control.ScaleLine()]), | ||
| target: 'map', | ||
| layers: layers, | ||
| view: new ol.View({ | ||
| center: ol.proj.fromLonLat([-97, 57]), | ||
| zoom: 3 | ||
| }) | ||
| }); | ||
|
|
||
| function exportMapFunction(e) { | ||
| map.once('rendercomplete', function () { | ||
| const mapCanvas = document.createElement('canvas'); | ||
| const size = map.getSize(); | ||
| mapCanvas.width = size[0]; | ||
| mapCanvas.height = size[1]; | ||
| const mapContext = mapCanvas.getContext('2d'); | ||
| Array.prototype.forEach.call( | ||
| map.getViewport().querySelectorAll('.ol-layer canvas, canvas.ol-layer'), | ||
| function (canvas) { | ||
| if (canvas.width > 0) { | ||
| const opacity = canvas.parentNode.style.opacity || canvas.style.opacity; | ||
| mapContext.globalAlpha = opacity === '' ? 1 : Number(opacity); | ||
| let matrix; | ||
| const transform = canvas.style.transform; | ||
| if (transform) { | ||
| // Get the transform parameters from the style's transform matrix | ||
| matrix = transform | ||
| .match(/^matrix\(([^\(]*)\)$/)[1] | ||
| .split(',') | ||
| .map(Number); | ||
| } else { | ||
| matrix = [ | ||
| parseFloat(canvas.style.width) / canvas.width, | ||
| 0, | ||
| 0, | ||
| parseFloat(canvas.style.height) / canvas.height, | ||
| 0, | ||
| 0, | ||
| ]; | ||
| } | ||
| // Apply the transform to the export map context | ||
| CanvasRenderingContext2D.prototype.setTransform.apply( | ||
| mapContext, | ||
| matrix | ||
| ); | ||
| const backgroundColor = canvas.parentNode.style.backgroundColor; | ||
| if (backgroundColor) { | ||
| mapContext.fillStyle = backgroundColor; | ||
| mapContext.fillRect(0, 0, canvas.width, canvas.height); | ||
| } | ||
| mapContext.drawImage(canvas, 0, 0); | ||
| } | ||
| } | ||
| ); | ||
| mapContext.globalAlpha = 1; | ||
| mapContext.setTransform(1, 0, 0, 1, 0, 0); | ||
| const link = document.getElementById('image-download'); | ||
| link.href = mapCanvas.toDataURL(); | ||
| link.click(); | ||
| }); | ||
| map.renderSync(); | ||
| }; | ||
|
|
||
| let exportButton = document.getElementById('exportmap'); | ||
| exportButton.addEventListener('click', exportMapFunction, false); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| var map = new ol.Map({ | ||
| target: 'map', | ||
| layers: [ | ||
| new ol.layer.Tile({ | ||
| source: new ol.source.OSM() | ||
| }), | ||
| new ol.layer.Tile({ | ||
| source: new ol.source.TileWMS({ | ||
| format: 'image/png', | ||
| url: 'https://geo.weather.gc.ca/geomet-climate/', | ||
| params: {'LAYERS': 'CanDCSU6-SSP585_AirTempAnomaly-Pct50_2071-2100_P0Y', 'TILED': true}, | ||
| }) | ||
| }) | ||
| ], | ||
| view: new ol.View({ | ||
| center: ol.proj.fromLonLat([-97, 57]), | ||
| zoom: 3 | ||
| }) | ||
| }); |
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