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Allow styles to configure a custom renderer

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Two new examples show how custom renderers can be used to render text along
paths, and to declutter labels using 3rd party libraries.
This commit is contained in:
Andreas Hocevar
2017-07-15 00:06:35 +02:00
parent 2258c00fca
commit c6b942f185
21 changed files with 762 additions and 72 deletions
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32
src/ol/renderer/vector.js
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@@ -2,6 +2,7 @@ goog.provide('ol.renderer.vector');
goog.require('ol');
goog.require('ol.ImageState');
goog.require('ol.geom.GeometryType');
goog.require('ol.render.ReplayType');
@@ -111,9 +112,34 @@ ol.renderer.vector.renderFeature_ = function(
return;
}
var simplifiedGeometry = geometry.getSimplifiedGeometry(squaredTolerance);
var geometryRenderer =
ol.renderer.vector.GEOMETRY_RENDERERS_[simplifiedGeometry.getType()];
geometryRenderer(replayGroup, simplifiedGeometry, style, feature);
var renderer = style.getRenderer();
if (renderer) {
ol.renderer.vector.renderGeometry_(replayGroup, simplifiedGeometry, style, feature);
} else {
var geometryRenderer =
ol.renderer.vector.GEOMETRY_RENDERERS_[simplifiedGeometry.getType()];
geometryRenderer(replayGroup, simplifiedGeometry, style, feature);
}
};
/**
* @param {ol.render.ReplayGroup} replayGroup Replay group.
* @param {ol.geom.Geometry} geometry Geometry.
* @param {ol.style.Style} style Style.
* @param {ol.Feature|ol.render.Feature} feature Feature.
* @private
*/
ol.renderer.vector.renderGeometry_ = function(replayGroup, geometry, style, feature) {
if (geometry.getType() == ol.geom.GeometryType.GEOMETRY_COLLECTION) {
var geometries = /** @type {ol.geom.GeometryCollection} */ (geometry).getGeometries();
for (var i = 0, ii = geometries.length; i < ii; ++i) {
ol.renderer.vector.renderGeometry_(replayGroup, geometries[i], style, feature);
}
return;
}
var replay = replayGroup.getReplay(style.getZIndex(), ol.render.ReplayType.DEFAULT);
replay.drawCustom(/** @type {ol.geom.SimpleGeometry} */ (geometry), feature, style.getRenderer());
};