92 lines
2.6 KiB
JavaScript
92 lines
2.6 KiB
JavaScript
// FIXME works for View2D only
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goog.provide('ol.interaction.KeyboardPan');
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goog.require('goog.asserts');
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goog.require('goog.events.KeyCodes');
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goog.require('goog.events.KeyHandler.EventType');
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goog.require('goog.functions');
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goog.require('ol.View2D');
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goog.require('ol.coordinate');
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goog.require('ol.interaction.ConditionType');
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goog.require('ol.interaction.Interaction');
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goog.require('ol.interaction.condition');
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/**
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* @define {number} Pan duration.
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*/
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ol.interaction.KEYBOARD_PAN_DURATION = 100;
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/**
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* @constructor
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* @extends {ol.interaction.Interaction}
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* @param {ol.interaction.KeyboardPanOptions=} opt_options Options.
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*/
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ol.interaction.KeyboardPan = function(opt_options) {
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goog.base(this);
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var options = goog.isDef(opt_options) ? opt_options : {};
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/**
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* @private
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* @type {ol.interaction.ConditionType}
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*/
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this.condition_ = goog.isDef(options.condition) ? options.condition :
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goog.functions.and(ol.interaction.condition.noModifierKeys,
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ol.interaction.condition.targetNotEditable);
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/**
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* @private
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* @type {number}
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*/
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this.delta_ = goog.isDef(options.delta) ? options.delta : 128;
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};
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goog.inherits(ol.interaction.KeyboardPan, ol.interaction.Interaction);
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/**
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* @inheritDoc
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*/
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ol.interaction.KeyboardPan.prototype.handleMapBrowserEvent =
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function(mapBrowserEvent) {
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var stopEvent = false;
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if (mapBrowserEvent.type == goog.events.KeyHandler.EventType.KEY) {
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var keyEvent = /** @type {goog.events.KeyEvent} */
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(mapBrowserEvent.browserEvent);
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var keyCode = keyEvent.keyCode;
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if (this.condition_(keyEvent) && (keyCode == goog.events.KeyCodes.DOWN ||
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keyCode == goog.events.KeyCodes.LEFT ||
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keyCode == goog.events.KeyCodes.RIGHT ||
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keyCode == goog.events.KeyCodes.UP)) {
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var map = mapBrowserEvent.map;
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// FIXME works for View2D only
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var view = map.getView();
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goog.asserts.assertInstanceof(view, ol.View2D);
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var view2DState = view.getView2DState();
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var mapUnitsDelta = view2DState.resolution * this.delta_;
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var deltaX = 0, deltaY = 0;
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if (keyCode == goog.events.KeyCodes.DOWN) {
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deltaY = -mapUnitsDelta;
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} else if (keyCode == goog.events.KeyCodes.LEFT) {
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deltaX = -mapUnitsDelta;
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} else if (keyCode == goog.events.KeyCodes.RIGHT) {
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deltaX = mapUnitsDelta;
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} else {
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deltaY = mapUnitsDelta;
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}
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var delta = [deltaX, deltaY];
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ol.coordinate.rotate(delta, view2DState.rotation);
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ol.interaction.Interaction.pan(
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map, view, delta, ol.interaction.KEYBOARD_PAN_DURATION);
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mapBrowserEvent.preventDefault();
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stopEvent = true;
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}
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}
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return !stopEvent;
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};
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