Google Earth API Samples - Draggable Placemark

Relevant Resources:

• google.earth Namespace Reference
• KmlPoint Reference
• KmlEvent Reference

Relevant Code Excerpt:

var dragInfo = null;

placemark.setName('Drag Me!');

// listen for mousedown on the window (look specifically for point placemarks)
google.earth.addEventListener(ge.getWindow(), 'mousedown', function(event) {
  if (event.getTarget().getType() == 'KmlPlacemark' &&
      event.getTarget().getGeometry().getType() == 'KmlPoint') {
    //event.preventDefault();
    var placemark = event.getTarget();
    
    dragInfo = {
      placemark: event.getTarget(),
      dragged: false
    };
  } 
});

// listen for mousemove on the globe
google.earth.addEventListener(ge.getGlobe(), 'mousemove', function(event) {
  if (dragInfo) {
    event.preventDefault();
    var point = dragInfo.placemark.getGeometry();
    point.setLatitude(event.getLatitude());
    point.setLongitude(event.getLongitude());
    dragInfo.dragged = true;
  }
});

// listen for mouseup on the window
google.earth.addEventListener(ge.getWindow(), 'mouseup', function(event) {
  if (dragInfo) {
    if (dragInfo.dragged) {
      // if the placemark was dragged, prevent balloons from popping up
      event.preventDefault();
    }
    
    dragInfo = null;
  }
});