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Adds option to View for using larger resolution value when clamping

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This commit is contained in:
Jeremy Smith
2020-01-29 14:36:56 +10:00
parent 2652c1a30d
commit 4151e86c0a
3 changed files with 51 additions and 12 deletions
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13
src/ol/View.js
View File

@@ -129,6 +129,8 @@ import {createMinMaxResolution} from './resolutionconstraint.js';
* @property {boolean} [smoothResolutionConstraint=true] If true, the resolution
* min/max values will be applied smoothly, i. e. allow the view to exceed slightly
* the given resolution or zoom bounds.
* @property {boolean} [largerResolutionConstraint=false] If true, the constrained
* resolution values will use the larger value to do so.
* @property {import("./proj.js").ProjectionLike} [projection='EPSG:3857'] The
* projection. The default is Spherical Mercator.
* @property {number} [resolution] The initial resolution for the view. The
@@ -1611,6 +1613,9 @@ export function createResolutionConstraint(options) {
const smooth =
options.smoothResolutionConstraint !== undefined ? options.smoothResolutionConstraint : true;
const larger =
options.largerResolutionConstraint !== undefined ? options.largerResolutionConstraint : false;
const projection = createProjection(options.projection, 'EPSG:3857');
const projExtent = projection.getExtent();
let constrainOnlyCenter = options.constrainOnlyCenter;
@@ -1628,10 +1633,10 @@ export function createResolutionConstraint(options) {
if (options.constrainResolution) {
resolutionConstraint = createSnapToResolutions(resolutions, smooth,
!constrainOnlyCenter && extent);
!constrainOnlyCenter && extent, larger);
} else {
resolutionConstraint = createMinMaxResolution(maxResolution, minResolution, smooth,
!constrainOnlyCenter && extent);
!constrainOnlyCenter && extent, larger);
}
} else {
// calculate the default min and max resolution
@@ -1677,10 +1682,10 @@ export function createResolutionConstraint(options) {
if (options.constrainResolution) {
resolutionConstraint = createSnapToPower(
zoomFactor, maxResolution, minResolution, smooth,
!constrainOnlyCenter && extent);
!constrainOnlyCenter && extent, larger);
} else {
resolutionConstraint = createMinMaxResolution(maxResolution, minResolution, smooth,
!constrainOnlyCenter && extent);
!constrainOnlyCenter && extent, larger);
}
}
return {constraint: resolutionConstraint, maxResolution: maxResolution,