在Bing地图上绘制多边形奇数行为setLocations
问题描述:
以下是我用于在Bing地图上绘制多边形的所有代码。我的问题是鼠标移动我试图删除多边形中的最后一个点,并将其替换为鼠标当前的位置。当点击发生时,添加一个额外的点来完成所述点,并且它应该在点击时加1点,并且在鼠标移动时应该是点中立(因为它弹出一次并且推一次)。我的问题是,由于某种原因,当我调用Polygon.setLocations(点)时,它会在内部附加一个点到我的多边形。在调用setLocations之前,我已经通过调试进行了验证,在调用setLocations之后,我比我少了1个点。控制台输出显示在代码下面以验证这一点。看起来像库中的一个bug,任何帮助将不胜感激找出如何防止这种情况,它似乎只发生在点的数组大于长度1时,因为当我只有1点时它不会引起这个怪异行为。在Bing地图上绘制多边形奇数行为setLocations
编辑:好吧,它重复了第一个元素在最后,而不是像内部引用自己一样,期望你必须修改倒数第二个索引,否则它有这种行为。
Microsoft.Maps.Events.addHandler(map, 'mousemove', PolygonDrawMouseMove);
Microsoft.Maps.Events.addHandler(map, 'click', function (e) {
HideInfobox();
HideContextInfobox();
ClearPinSelection();
PolygonDrawClick(e);
});
Microsoft.Maps.Events.addHandler(map, 'rightclick', function() {
HideInfobox();
HideContextInfobox();
ClearPinSelection();
});
var Polygon = null;
var isDrawingMode = false;
function PolygonDrawClick(event) {
if (isDrawingMode && Polygon !== null && Polygon instanceof Microsoft.Maps.Polygon)
{
var locations = Polygon.getLocations();
var location = propertyMap.tryPixelToLocation(new Microsoft.Maps.Point(event.getX(), event.getY()));
locations.push(location);
Polygon.setLocations(locations);
}
}
function PolygonDrawMouseMove(event)
{
if (isDrawingMode && Polygon !== null && Polygon instanceof Microsoft.Maps.Polygon)
{
var points = Polygon.getLocations();
if (points.length > 1)
{
console.log('start');
console.log(points.length);
}
if (points.length > 0)
{
points.pop();
}
if (points.length > 1)
console.log(points.length);
var location = propertyMap.tryPixelToLocation(new Microsoft.Maps.Point(event.getX(), event.getY()));
points.push(location);
if (points.length > 1)
console.log(points.length);
Polygon.setLocations(points);
if(points.length > 1)
{
console.log(Polygon.getLocations().length);
}
}
}
function DeletePolygons() {
if (!propertyMap)
return;
for (var i = propertyMap.entities.getLength() - 1; i >= 0; i--) {
var polygon = propertyMap.entities.get(i);
if (polygon instanceof Microsoft.Maps.Polygon)
propertyMap.entities.removeAt(i);
}
Polygon = null;
}
$("#compsMap").keyup(function (event) {
//escape
if (event.keyCode === 27 && isDrawingMode && Polygon !== null && Polygon instanceof Microsoft.Maps.Polygon)
{
isDrawingMode = false;
var locations = Polygon.getLocations();
if (locations.length > 0) locations.pop();
if (locations.length === 0)
DeletePolygons();
else
Polygon.setLocations(locations);
}
else if (event.keyCode === 32 && !isDrawingMode) //space
{
DeletePolygons();
isDrawingMode = true;
Polygon = new Microsoft.Maps.Polygon([new Microsoft.Maps.Location(0,0)], { fillColor: 'rgba(255,212,42,0.6)', strokeColor: '#000000', strokeThickness: 2 });
propertyMap.entities.push(Polygon);
}
});
[![screen shot of console output][1]][1]
答
这是设计。多边形在V8中自动关闭它们的环以帮助使它们有效。简单地引用它本身并不是正常的,它也不会起作用。