47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
// FIXME cope with rotation
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goog.provide('ol.interaction.DragPan');
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goog.require('ol.Coordinate');
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goog.require('ol.MapBrowserEvent');
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goog.require('ol.interaction.Constraints');
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goog.require('ol.interaction.Drag');
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/**
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* @constructor
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* @extends {ol.interaction.Drag}
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* @param {ol.interaction.Constraints} constraints Constraints.
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*/
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ol.interaction.DragPan = function(constraints) {
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goog.base(this, constraints);
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};
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goog.inherits(ol.interaction.DragPan, ol.interaction.Drag);
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/**
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* @inheritDoc
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*/
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ol.interaction.DragPan.prototype.handleDrag = function(mapBrowserEvent) {
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var map = mapBrowserEvent.map;
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var resolution = map.getResolution();
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var delta =
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new ol.Coordinate(-resolution * this.deltaX, resolution * this.deltaY);
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this.pan(map, delta, this.startCenter);
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};
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/**
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* @inheritDoc
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*/
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ol.interaction.DragPan.prototype.handleDragStart = function(mapBrowserEvent) {
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var browserEvent = mapBrowserEvent.browserEvent;
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if (!browserEvent.shiftKey) {
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browserEvent.preventDefault();
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return true;
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} else {
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return false;
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}
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};
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