96 lines
4.2 KiB
JavaScript
96 lines
4.2 KiB
JavaScript
/**
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* @module ol/layer/VectorImage
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*/
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import BaseVectorLayer from './BaseVector.js';
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import {assign} from '../obj.js';
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import CanvasVectorImageLayerRenderer from '../renderer/canvas/VectorImageLayer.js';
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/**
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* @typedef {Object} Options
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* @property {number} [opacity=1] Opacity (0, 1).
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* @property {boolean} [visible=true] Visibility.
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* @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering. The layer will not be
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* rendered outside of this extent.
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* @property {number} [zIndex] The z-index for layer rendering. At rendering time, the layers
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* will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed
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* for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`
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* method was used.
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* @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be
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* visible.
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* @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will
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* be visible.
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* @property {import("../render.js").OrderFunction} [renderOrder] Render order. Function to be used when sorting
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* features before rendering. By default features are drawn in the order that they are created. Use
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* `null` to avoid the sort, but get an undefined draw order.
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* @property {number} [renderBuffer=100] The buffer in pixels around the viewport extent used by the
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* renderer when getting features from the vector source for the rendering or hit-detection.
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* Recommended value: the size of the largest symbol, line width or label.
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* @property {import("../source/Vector.js").default} [source] Source.
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* @property {import("../PluggableMap.js").default} [map] Sets the layer as overlay on a map. The map will not manage
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* this layer in its layers collection, and the layer will be rendered on top. This is useful for
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* temporary layers. The standard way to add a layer to a map and have it managed by the map is to
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* use {@link module:ol/Map#addLayer}.
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* @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all
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* image and text styles, and the priority is defined by the z-index of the style. Lower z-index
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* means higher priority.
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* @property {import("../style/Style.js").StyleLike} [style] Layer style. See
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* {@link module:ol/style} for default style which will be used if this is not defined.
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* @property {boolean} [updateWhileAnimating=false] When set to `true`, feature batches will
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* be recreated during animations. This means that no vectors will be shown clipped, but the
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* setting will have a performance impact for large amounts of vector data. When set to `false`,
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* batches will be recreated when no animation is active.
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* @property {boolean} [updateWhileInteracting=false] When set to `true`, feature batches will
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* be recreated during interactions. See also `updateWhileAnimating`.
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* @property {number} [imageRatio=1] Ratio by which the rendered extent should be larger than the
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* viewport extent. A larger ratio avoids cut images during panning, but will cause a decrease in performance.
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*/
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/**
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* @classdesc
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* Vector data that is rendered client-side.
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* Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}
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* property on the layer object; for example, setting `title: 'My Title'` in the
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* options means that `title` is observable, and has get/set accessors.
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*
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* @api
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*/
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class VectorImageLayer extends BaseVectorLayer {
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/**
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* @param {Options=} opt_options Options.
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*/
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constructor(opt_options) {
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const options = opt_options ? opt_options : /** @type {Options} */ ({});
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const baseOptions = assign({}, options);
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delete baseOptions.imageRatio;
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super(baseOptions);
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/**
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* @type {number}
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* @private
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*/
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this.imageRatio_ = options.imageRatio !== undefined ? options.imageRatio : 1;
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}
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/**
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* @return {number} Ratio between rendered extent size and viewport extent size.
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*/
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getImageRatio() {
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return this.imageRatio_;
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}
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/**
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* Create a renderer for this layer.
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* @return {import("../renderer/Layer.js").default} A layer renderer.
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* @protected
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*/
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createRenderer() {
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return new CanvasVectorImageLayerRenderer(this);
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}
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}
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export default VectorImageLayer;
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