Hi Koen,
> > Oops... the problem is that you cannot manipulate the map before
> > initialize is called. But you also cannot call google.load() multiple
> > times since that loads google's JavaScript multiple times (despite
> > their documentation saying it will not).
> >
> > In our development branch we have added a new method to WWidget,
> > render(), which is useful to defer rendering code until the last
> > moment, which would be useful in this case. But in Wt 2, we do have
> > the undocumented prepareRender() method which can be used here.
> >
> > The version below shows a marker (at your home, I assume?)
>
> The marker is actually the landing zone in front of my home :-)
>
> The maps works now very nicely in the test application.
> But inside my flightlogbook application, it doesn't call
> prepareRerender() at all.
I could reproduce the problem in a small test application, and here is
what I found so far:
If I create the WGoogleMap widget within a slot-function, then the
prepareRender() function will not be called, and thus no map displayed.
Here is a small test that can reproduce the behavior :
class Testapp : public Wt::WApplication
{
public:
Testapp(const Wt::WEnvironment& env) : Wt::WApplication(env)
{
Wt::WBorderLayout *blayout = new Wt::WBorderLayout();
root()->setLayout(blayout);
contw_ = new Wt::WContainerWidget();
blayout->addWidget(contw_, Wt::WBorderLayout::Center);
Wt::WComboBox *cbStatSel = new Wt::WComboBox();
// Wt::Ext::ComboBox *cbStatSel = new Wt::Ext::ComboBox();
cbStatSel->activated.connect(SLOT(this, Testapp::drawMap));
cbStatSel->addItem("Marker");
cbStatSel->addItem("Polyline");
blayout->addWidget(cbStatSel, Wt::WBorderLayout::North);
drawMap(0);
}
virtual ~Testapp() { }
void drawMap(int ind)
{
contw_->clear();
Wt::WGoogleMap *gmap = new Wt::WGoogleMap(contw_);
gmap->resize(700, 500);
if(ind)
{
vector<pair<double, double> > points;
points.push_back(make_pair(47.06354722, 8.647369));
points.push_back(make_pair(47.01887777, 8.651888));
gmap->addPolyline(points, "#FF0000", 2, 0.9);
}
else
gmap->addMarker(std::make_pair(47.01887777, 8.651888));
}
private:
Wt::WContainerWidget *contw_;
};
Rgds
Richard
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