Mercurial > gemma
changeset 3123:f0af359391a0
client: map layers: share certain layer objects across map
| author | Markus Kottlaender <markus@intevation.de> |
|---|---|
| date | Mon, 29 Apr 2019 12:11:06 +0200 |
| parents | 3dffeb6df4a3 |
| children | 583b6748431f |
| files | client/src/components/map/layers.js |
| diffstat | 1 files changed, 102 insertions(+), 93 deletions(-) [+] |
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--- a/client/src/components/map/layers.js Mon Apr 29 11:58:20 2019 +0200 +++ b/client/src/components/map/layers.js Mon Apr 29 12:11:06 2019 +0200 @@ -60,6 +60,106 @@ }; }; +// SHARED LAYERS: +// DRAW- and CUTLAYER are shared across maps. E.g. you want to see the cross cut +// arrow on both maps when comparing surveys. So we don't need to initialize a +// new VectorLayer object for each map. Instead we use these two constants so +// that all maps use the same object. +const DRAWLAYER = new VectorLayer({ + id: "DRAWTOOL", + label: "Draw Tool", + visible: true, + source: new VectorSource({ wrapX: false }), + style: function(feature) { + // adapted from OpenLayer's LineString Arrow Example + var geometry = feature.getGeometry(); + var styles = [ + // linestring + new Style({ + stroke: new Stroke({ + color: "#369aca", + width: 2 + }) + }) + ]; + + if (geometry.getType() === "LineString") { + geometry.forEachSegment(function(start, end) { + var dx = end[0] - start[0]; + var dy = end[1] - start[1]; + var rotation = Math.atan2(dy, dx); + // arrows + styles.push( + new Style({ + geometry: new Point(end), + image: new Icon({ + // we need to make sure the image is loaded by Vue Loader + src: require("@/assets/linestring_arrow.png"), + // fiddling with the anchor's y value does not help to + // position the image more centered on the line ending, as the + // default line style seems to be slightly uncentered in the + // anti-aliasing, but the image is not placed with subpixel + // precision + anchor: [0.75, 0.5], + rotateWithView: true, + rotation: -rotation + }) + }) + ); + }); + } + return styles; + } +}); + +const CUTLAYER = new VectorLayer({ + id: "CUTTOOL", + label: "Cut Tool", + visible: true, + source: new VectorSource({ wrapX: false }), + style: function(feature) { + // adapted from OpenLayer's LineString Arrow Example + var geometry = feature.getGeometry(); + var styles = [ + // linestring + new Style({ + stroke: new Stroke({ + color: "#333333", + width: 2, + lineDash: [7, 7] + }) + }) + ]; + + if (geometry.getType() === "LineString") { + geometry.forEachSegment(function(start, end) { + var dx = end[0] - start[0]; + var dy = end[1] - start[1]; + var rotation = Math.atan2(dy, dx); + // arrows + styles.push( + new Style({ + geometry: new Point(end), + image: new Icon({ + // we need to make sure the image is loaded by Vue Loader + src: require("@/assets/linestring_arrow_grey.png"), + // fiddling with the anchor's y value does not help to + // position the image more centered on the line ending, as the + // default line style seems to be slightly uncentered in the + // anti-aliasing, but the image is not placed with subpixel + // precision + anchor: [0.75, 0.5], + rotateWithView: true, + rotation: -rotation + }) + }) + ); + }); + } + return styles; + } +}); + export default function() { return { get(id) { @@ -393,99 +493,8 @@ source }); })(), - new VectorLayer({ - id: "DRAWTOOL", - label: "Draw Tool", - visible: true, - source: new VectorSource({ wrapX: false }), - style: function(feature) { - // adapted from OpenLayer's LineString Arrow Example - var geometry = feature.getGeometry(); - var styles = [ - // linestring - new Style({ - stroke: new Stroke({ - color: "#369aca", - width: 2 - }) - }) - ]; - - if (geometry.getType() === "LineString") { - geometry.forEachSegment(function(start, end) { - var dx = end[0] - start[0]; - var dy = end[1] - start[1]; - var rotation = Math.atan2(dy, dx); - // arrows - styles.push( - new Style({ - geometry: new Point(end), - image: new Icon({ - // we need to make sure the image is loaded by Vue Loader - src: require("@/assets/linestring_arrow.png"), - // fiddling with the anchor's y value does not help to - // position the image more centered on the line ending, as the - // default line style seems to be slightly uncentered in the - // anti-aliasing, but the image is not placed with subpixel - // precision - anchor: [0.75, 0.5], - rotateWithView: true, - rotation: -rotation - }) - }) - ); - }); - } - return styles; - } - }), - new VectorLayer({ - id: "CUTTOOL", - label: "Cut Tool", - visible: true, - source: new VectorSource({ wrapX: false }), - style: function(feature) { - // adapted from OpenLayer's LineString Arrow Example - var geometry = feature.getGeometry(); - var styles = [ - // linestring - new Style({ - stroke: new Stroke({ - color: "#333333", - width: 2, - lineDash: [7, 7] - }) - }) - ]; - - if (geometry.getType() === "LineString") { - geometry.forEachSegment(function(start, end) { - var dx = end[0] - start[0]; - var dy = end[1] - start[1]; - var rotation = Math.atan2(dy, dx); - // arrows - styles.push( - new Style({ - geometry: new Point(end), - image: new Icon({ - // we need to make sure the image is loaded by Vue Loader - src: require("@/assets/linestring_arrow_grey.png"), - // fiddling with the anchor's y value does not help to - // position the image more centered on the line ending, as the - // default line style seems to be slightly uncentered in the - // anti-aliasing, but the image is not placed with subpixel - // precision - anchor: [0.75, 0.5], - rotateWithView: true, - rotation: -rotation - }) - }) - ); - }); - } - return styles; - } - }) + DRAWLAYER, + CUTLAYER ] }; }