Wt

Hi there

Is there any Example about using two Models?
I can't seem to get the second to show...

I found here https://redmine.webtoolkit.eu/boards/2/topics/16703
that it should be possible ...

The Examples are all using a new Column for the Data, but as the primary source for me is a QueryModel, how would I go about that?

And given the Info from the Post linked above, there would be just 2 Rows in the Second Model to create a Line, this Line would be broken up anyway.

Might be special case as I map to DateTime on xAxis...

Idea is to have a bunch of Points with WDateTime field, which works fine with a QueryModel.
Showing a Line in a certain TimeRange with two Points does not happen for me...

here's my code if someone has a chance to look it through?

auto timeQuery = trackPtr->dataPoints.find()
                    .where("datetime BETWEEN ? AND ?")
                    .bind(tPtr->getStartTime())
                    .bind(endTime);

// dataModel is QueryModel

dataModel->setQuery(timeQuery);
dataModel->addColumn("datetime");  // type WDateTime
dataModel->addColumn("value");     // type int


tChart->setModel(dataModel);
tChart->setAutoLayoutEnabled(true);
tChart->setXSeriesColumn(0);
tChart->xAxis(0).setScale(Wt::Chart::AxisScale::DateTime);


auto dataSeries = 
    std::make_unique<Wt::Chart::WDataSeries>(1, Wt::Chart::SeriesType::Point, 0);
dataSeries->setPen(Wt::WPen(Wt::StandardColor::Red));

tChart->addSeries(std::move(dataSeries)); 
// The dataSeries shows up Fine and uses dataModel



// Probably overkill, but currently not sure how to create this differently
// or for that matter apparently correctly

auto startItem = std::make_unique<Wt::WStandardItem>();
{
    auto startDateItem = std::make_unique<Wt::WStandardItem>();
    startDateItem->setData(tPtr->getStartTime());
    auto startValueItem = std::make_unique<Wt::WStandardItem>();
    startValueItem->setData(tPtr->getTargetValue());

    startItem->setChild(0, 0, std::move(startDateItem));
    startItem->setChild(0, 1, std::move(startValueItem));
}

auto endItem = std::make_unique<Wt::WStandardItem>();
{
    auto endDateItem = std::make_unique<Wt::WStandardItem>();

    if(tPtr->getTargetTime().isValid())
        endDateItem->setData(tPtr->getTargetTime());
    else
        endDateItem->setData(Wt::WDateTime::currentDateTime(), Wt::ItemDataRole::User);

    auto endValueItem = std::make_unique<Wt::WStandardItem>();
    endValueItem->setData(tPtr->getTargetValue());

    endItem->setChild(0, 0, std::move(endDateItem));
    endItem->setChild(0, 1, std::move(endValueItem));
}
targetModel->appendRow(std::move(startItem));
targetModel->appendRow(std::move(endItem));

Wt::log("targetSeries") << "Items: " << targetModel->rowCount(); 
// Shows 2 Items, as expected;

auto targetSeries = std::make_unique<Wt::Chart::WDataSeries>(1, Wt::Chart::SeriesType::Point, 1); // or ::Line
targetSeries->setModel(
    std::make_shared<Wt::Chart::WStandardChartProxyModel>(targetModel));
targetSeries->setPen(Wt::WPen(Wt::StandardColor::Blue));
targetSeries->setXSeriesColumn(0);


tChart->addSeries(std::move(targetSeries));
// These two Points do not show up! Not even if they are alone in the Chart!
// I would like to Paint a Line with this Series

I have no Idea where to look anymore.
In the examples is nothing that would help me.

Thanks!