[khtml.maplib] Re: clear markers

  • From: Mátrai Tamás <tmatrai@xxxxxxxxxxx>
  • To: khtml.maplib@xxxxxxxxxxxxx
  • Date: Tue, 30 Aug 2011 18:17:58 +0200

Hello Eward!

Thx for the fast reply!

I have downloaded your fixed code but unfortunately it does not work. 
I can not even add markers to map, so my map is empty.
I use the same function to show markers I sent in my previous mail.
When I switch back to the 'old' library my markers are shown on the map - 
without making any changes in code.
I triple checked it, so it is 100% sure on my side.

Okkey, when I am completed I'd show you!

BR:
Tamas


On Aug 30, 2011, at 5:49 PM, Ewald Wieser wrote:

> Hello Tamas,
> 
> with marker.clear() you can remove one marker from the map.
> Unfortunately I just found a little bug in the clear-function.
> I have uploaded a new version at 
> http://mt091110.students.fhstp.ac.at/khtml/maplib.tar.gz
> 
> If you would like to remove all overlays at once, you can use 
> map.removeOverlays();
> 
> Sorry for the inconvenience, but this library is still beta.
> But I'm glad that you like it!
> 
> Maybe you can show us the result of your work.
> brgds Ewald
> 
> 
> Am 30.08.2011 um 17:18 schrieb Mátrai Tamás:
> 
>> Hi All!
>> 
>> I am Tamas Matrai from Hungary, I've just start to play with KHTML maps.
>> 
>> It is looking great, it is very promising, thx for this great project!
>> I could create my app I need in some hours.
>> It is a simple one that shows some markers on the map, based data coming 
>> from GPS devices.
>> 
>> My problem is with clearing markers from the map, after adding one I can not 
>> clear it. It tried several ways but neither works.
>> 
>> I use GSOC improved javascript library from here: 
>> http://wiki.openstreetmap.org/wiki/Improving_khtml.maplib#Markers
>> 
>> My code (note this is very experimental one!):
>> I have a global variable: 
>> 
>> var mr = new Object(khtml.maplib);
>> 
>> The following function adds a marker to the map (markerStr some delimited 
>> string contains position and extra data):
>> 
>> function RefreshMarkers(markersStr)
>>         {
>>          var sentences = markersStr.split("\r\n");
>>             
>>             for (i = 0; i < sentences.length; i++) {
>>                 
>>                 var sentenceParts = sentences[i].split("%_@");
>>                 
>>                 var image = new mr.overlay.MarkerImage(
>>                  'khtml/img/standardmarker_nor.png',
>>                  new mr.Size(20, 20),
>>                  new mr.Point(0, 0),
>>                  new mr.Point(10, 20)
>>                  );
>> 
>>                 var shadow = new mr.overlay.MarkerImage(
>>                  'khtml/img/standardmarkershadow_nor.png',
>>                  new mr.Size(34, 20),
>>                  new mr.Point(0, 0),
>>                  new mr.Point(10, 20)
>>                  );
>> 
>>                 var shape = {
>>                     coord: [14, 0, 15, 1, 16, 2, 17, 3, 18, 4, 19, 5, 19, 6, 
>> 19, 7, 19, 8, 19, 9, 19, 10, 19, 11, 19, 12, 19, 13, 19, 14, 18, 15, 17, 16, 
>> 16, 17, 15, 18, 13, 19, 5, 19, 4, 18, 2, 17, 2, 16, 1, 15, 0, 14, 0, 13, 0, 
>> 12, 0, 11, 0, 10, 0, 9, 0, 8, 0, 7, 0, 6, 0, 5, 1, 4, 2, 3, 2, 2, 4, 1, 5, 
>> 0, 14, 0],
>>                     type: 'poly'
>>                 };
>> 
>>                 var pLatLng = new mr.LatLng(sentenceParts[4], 
>> sentenceParts[3]);
>>                 var marker2 = new mr.overlay.Marker({
>>                     position: pLatLng,
>>                     map: map,
>>                     title: sentenceParts[1] + 
>>                            "\r\n" + sentenceParts[2] +
>>                            "\r\n" + sentenceParts[0] +
>>                            "\r\n" + sentenceParts[5] + " km/h" +
>>                            "\r\n" + sentenceParts[9]
>>                 });
>>             }
>>         }
>> 
>> 
>> So, as I said adding is OK, but later I can not remove them  (neither in 
>> this RefreshMarkers function for testing purposes).
>> So, how can I do this? Is there any way to clear all markers from a map?
>> 
>> Thanks,
>> BR:
>> Tamas
>> 
> 

Other related posts: