WebViewExtras Google Maps & Markers

[bryanh]

Hi,
I can show a number of markers indicating where photos were taken using the code:

For i = 0 to numphotos,
..
HtmlCode = HtmlCode & "; var marker = new google.maps.Marker({   position: new google.maps.LatLng(" & lat & "," & lon & "),map: map, clickable: true, draggable: true, icon: 'http://www.google.com/mapfiles/marker_orange.png' })"
HtmlCode = HtmlCode & "; marker.setTitle('" & picfile & "')"
..
Next

I have set the title for each marker as the filename of the particular photo.

I then wish to set up an event so that when a marker is clicked the photo is shown in an imageview. Following the above code I've added:

HtmlCode = HtmlCode & "; google.maps.event.addListener(marker, 'click', function(mouseevent) {"
          HtmlCode = HtmlCode & "B4A.CallSub('MapViewer_MarkerClicked', marker.getTitle); })"

The B4A subroutine is:

Sub MapViewer_MarkerClicked(mark As String)
  ImageView1.Bitmap = LoadBitmap(picdir, mark)
End Sub

However, when I run the program and click on one of the markers I get the error message:

java.lang.Exception: Sub mapviewer_markerclicked
signature does not match expected signature

Can anyone suggest the meaning of the error message, and how it can be avoided.
Many thanks
bryanh

 

[warwound]

You've omitted the callUIThread parameter in your javascript.

http://www.b4x.com/forum/additional...al-updates/12453-webviewextras.html#post70053

HtmlCode = HtmlCode & "; google.maps.event.addListener(marker, 'click', function(mouseevent) {"
HtmlCode = HtmlCode & "B4A.CallSub('MapViewer_MarkerClicked', true, marker.getTitle); })"

As your app's user interface will be modified by the CallSub you must pass javascript value true for callUIThread.

Martin.

 

[bryanh]

Many thanks Martin .. all going well now
Bryan