Hi Koen,
> My fault, the version below fixes that (you should not pass on the
> parent widget to the base class if you are relying on the virtual
> load() method to be called when the widget is inserted in the widget
> hierarchy).
This works now everywhere I tested.
> I've modified the test case so that the variable will be available as
> jsRef() + ".map".
That's great news. But I couldn't figure out how to use it correctly.
Here is what I tried:
void WGoogleMap::refresh()
{
// initialize the map
std::ostringstream strm;
strm << "function initialize() {"
<< " var map = new google.maps.Map2(" << jsRef() << ");"
<< " map.setCenter(new google.maps.LatLng(47.01887777,
8.651888), 13);"
<< " map.enableScrollWheelZoom();"
<< " map.addControl(new
google.maps.HierarchicalMapTypeControl());"
<< jsRef() << ".map = map;";
copy(additions_.begin(), additions_.end(),
std::ostream_iterator<string>(strm));
strm << "}";
strm << "google.load(\"maps\", \"2\", {other_params:\"sensor=false
\", callback: initialize});";
WApplication::instance()->doJavaScript(strm.str());
}
void WGoogleMap::addMarker(const pair<double, double> &pos)
{
std::ostringstream strm;
strm << "var marker = new google.maps.Marker(new
google.maps.LatLng(47.01887777, 8.651888));"
<< jsRef() << ".map.addOverlay(marker);";
const string jsstr = strm.str();
additions_.push_back(jsstr);
WApplication::instance()->doJavaScript(jsstr);
}
void WGoogleMap::addPolyline(const vector<pair<double, double> >
&points, const string &color, int width, float opacity)
{
opacity = std::max(std::min(opacity, 1.0), 0.0); // opacity has to
be between 0.0 and 1.0
std::ostringstream strm;
strm << "var waypoints = [];";
for(size_t i=0; i<points.size(); ++i)
strm << "waypoints[" << i << "] = new google.maps.LatLng(" <<
points[i].first << ", " << points[i].second << ");";
strm << "var poly = new google.maps.Polyline(waypoints, \"" << color
<< "\", " << width << ", " << opacity << ");";
strm << jsRef() << ".map.addOverlay(poly);";
const string jsstr = "if(true){" + strm.str() + "}"; // to keep the
variables inside a scope where they don't interfere
additions_.push_back(jsstr);
WApplication::instance()->doJavaScript(jsstr);
}
WApplication *createApplication( const WEnvironment& env )
{
WApplication *app = new WApplication(env);
Wt::WGoogleMap *gmap = new Wt::WGoogleMap(app->root());
gmap->resize(700, 500);
gmap->addMarker(std::make_pair(47.01887777, 8.651888));
std::vector<std::pair<double, double> > points;
points.push_back(std::make_pair(47.06354722, 8.647369));
points.push_back(std::make_pair(47.01887777, 8.651888));
gmap->addPolyline(points, "#FF0000", 2, 0.9);
return app;
}
It displays the map, but instead of displaying the overlays, I get a
message saying that google.maps.LatLng is not a constructor.
I tried to do something similar in html, but didn't succeed either.
Rgds
Richard
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