[英]How to fire function when feature drawing complete?
I use openlayers 2 in my project. 我在我的项目中使用openlayers 2。
I draw 3 types of features on the map after drawing is complete I need to trigger function named featureDrawed. 绘图完成后,我在地图上绘制了3种类型的特征我需要触发名为featureDrawed的函数。
Her is my code: 她是我的代码:
drawControl = {
point: new OpenLayers.Control.DrawFeature(new OpenLayers.Layer.Vector("Point Layer"), OpenLayers.Handler.Point } }),
line: new OpenLayers.Control.DrawFeature(new OpenLayers.Layer.Vector("Line Layer"), OpenLayers.Handler.Path),
polygon: new OpenLayers.Control.DrawFeature(new OpenLayers.Layer.Vector("Polygon Layer"), OpenLayers.Handler.Polygon)
}
for (var key in drawControl) {
control = drawControl[key];
controls.push(control);
}
Here is the html where user select the feature to draw: 这是用户选择要绘制的特征的html:
<div data-role="popup" id="popupShapes" data-theme="none" style="z-index:999">
<div data-role="collapsibleset" data-theme="b" data-content-theme="a" style="margin:0; width:250px;">
<div data-role="listview" data-inset="false">
<ul data-role="listview">
<li>
<input type="radio" name="type" value="point" id="pointToggle" />
<label for="pointToggle">draw point</label>
</li>
<li>
<input type="radio" name="type" value="line" id="lineToggle" />
<label for="lineToggle">draw line</label>
</li>
<li>
<input type="radio" name="type" value="polygon" id="polygonToggle" />
<label for="polygonToggle">draw polygon</label>
</li>
</ul>
</div>
</div>
</div>
And here is event that fired after user select the shape to be drawn. 这是用户选择要绘制的形状后触发的事件。
$("#popupShapes ul li input").click(function () {
var val = $(this).val();
for (key in drawControl) {
var control = drawControl[key];
if (val == key) {
control.activate();
} else {
control.deactivate();
}
}
});
The code is works fine. 代码工作正常。 But the problem is that I can't create event that fired after feature is draw on the map. 但问题是我无法创建在地图上绘制要素后触发的事件。
You can use addEventListener and dispatchEvent. 您可以使用addEventListener和dispatchEvent。 For example: 例如:
function DrawSomething(){
/*drawing*/
let event=new Event('featureDrawed');
this.dispatchEvent(event);
}
Somewhere in code 代码中的某个地方
DrawSomething.addEventListener('featureDrawed', function(){
/*action you want to do when all you want is drawn*/
})
Note: you need to addEventListener before picture is drawn 注意:在绘制图片之前需要addEventListener
Declare the function to be called on draw end: 声明在绘制结束时调用的函数:
var onDrawEnd = function(e) {
console.log('feature added', e.feature);
//your logic
};
Register a listener for each control: 为每个控件注册一个监听器:
for (var key in drawControl) {
control = drawControl[key];
control.events.register('featureadded', null, onDrawEnd);
controls.push(control);
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.