我目前正在实施一个dragBox来一次选择多个向量。 由于dragBox对象需要"条件:"在官方的例子中,它是一个关键的新闻,"转移"我想,我已经在Angular中设置了一个单例布尔变量,它将条件设置为" ol.events.condition.always"或者" ol.events.condition.never"该对象在计算机上接受并正常工作...但是在移动设备上不起作用,我认为这可能适用于移动设备,比如绘制圆形而不是。
有没有办法让这项功能在移动设备上运行?
这是我的代码。
mapFeature.addDragBox = function () {
webMapValues.dragBox = new ol.interaction.DragBox({
/* dragbox interaction is active only if "multi select"
check box is checked is pressed */
condition: ((webMapValues.multiSelect == true) ?
ol.events.condition.always : ol.events.condition.never),
/* style the box */
style: new ol.style.Style({
stroke: new ol.style.Stroke({
color: [0, 0, 255, 1]
})
})
});
/* add the DragBox interaction to the map */
webMapValues.mapObj.addInteraction(webMapValues.dragBox);
if (webMapValues.multiSelect == true) {
webMapValues.vectorMultiSelect = new
ol.interaction.Select();
webMapValues.mapObj.addInteraction(webMapValues.vectorMultiSelect);
webMapValues.multiSelectFeatures =
webMapValues.vectorMultiSelect.getFeatures();
webMapValues.dragBox.on('boxend', function () {
// features that intersect the box are added to the
collection of
// selected features
webMapValues.clickedCoordinates =
webMapValues.dragBox.getGeometry().getCoordinates();
var extent =
webMapValues.dragBox.getGeometry().getExtent();
var layer = rcisMapService.getLayer("vector");
angular.forEach(layer, function (Layer, key) {
var source = Layer.getSource();
source.forEachFeatureIntersectingExtent(extent,
function (feature) {
webMapValues.multiSelectedFeatures.push(vector);
});
});
mapFeature.Highlight();
});
webMapValues.dragBox.on('boxstart', function () {
webMapValues.popup.setPosition(undefined);
webMapValues.multiSelectedFeatures = [];
});
}
};
答案 0 :(得分:0)
OpenLayers 3中不存在在移动设备上“拖动”的能力......最接近它的是使用“绘制”功能绘制正方形,然后获取与该正方形相交的所有内容。
if (selectionToolsSelection == "Box") {
var geometryFunction = ol.interaction.Draw.createBox();
drawObj = new ol.interaction.Draw({
features: features,
type: "Circle",
geometryFunction: geometryFunction
});
mapObj.addInteraction(drawObj);
}
然后你可以抓住“drawend”事件并做你需要的事情......
drawObj.on('drawend', function (e) {Do magic stuff here});
答案 1 :(得分:0)
mouseActionButton
(请参阅:Pull Request: Support touch events for DragBox
interaction),为拖动框支持触摸设备
import {mouseActionButton} from 'ol/events/condition';
const dragBox = new DragBox({
condition: mouseActionButton,
});