Hey Richard,
2009/1/29 Richard Ulrich <[email protected]>:
> So I started playing with the GoogleMaps widget.
>
> But I can't seem to get it running.
> Here I what I do :
Thanks for the start!
I moved some things around, and made the following changes:
- the widget is created but not yet inserted in the widget tree by
only doing the JavaScript as soon as the widget is load()ed
- there is no need for onLoadCallback: this is integrated in Wt --
JavaScript is only run when a library is loaded
- make sure that the map is rerendered when the session is refreshed
And that seems to work!
Regards,
koen
Here is my test program:
#include <Wt/WApplication>
#include <Wt/WContainerWidget>
#include <Wt/WText>
#include <string>
#include <sstream>
using namespace Wt;
class WGoogleMap : public WContainerWidget
{
public:
WGoogleMap(WContainerWidget *parent = 0);
virtual ~WGoogleMap() { }
virtual void load();
virtual void refresh();
};
// example javascript code from :
// http://code.google.com/apis/maps/documentation/
WGoogleMap::WGoogleMap(WContainerWidget *parent) : WContainerWidget(parent)
{
WApplication *app = WApplication::instance();
// if there is no google api key configured, use the one
// for http://localhost:8080/
const std::string localhost_key =
"ABQIAAAAWqrN5o4-ISwj0Up_depYvhTwM0brOpm-All5BF6PoaKBxRWWERS"
"-S9gPtCri-B6BZeXV8KpT4F80DQ";
std::string googlekey;
if (!app->readConfigurationProperty("google_api_key", googlekey))
googlekey = localhost_key;
// load the google javascript api script
const std::string gmuri = "http://www.google.com/jsapi?key="; + googlekey;
app->require(gmuri, "google");
}
void WGoogleMap::load()
{
refresh();
}
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());"
<< "}";
strm << "google.load(\"maps\", \"2\",
{other_params:\"sensor=false\", callback: initialize});";
WApplication::instance()->doJavaScript(strm.str());
}
WApplication *createApplication( const WEnvironment& env )
{
WApplication *app = new WApplication(env);
app->root()->addWidget(new WGoogleMap());
return app;
}
int main( int argc, char **argv )
{
return WRun( argc, argv, &createApplication );
}
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