Label Item disappears from the scene after constantly calling setText()

Question

We have a label item showing the info about a track on the 3D SceneGraphicsView, just as below. There are many tracks on scene and each track has its own label.

Esri::ArcGISRuntime::Graphic *mpLabelItem = nullptr;
Esri::ArcGISRuntime::TextSymbol *mpTextSymbol = nullptr;

mpTextSymbol = new TextSymbol("", QColor(Qt::white), 10.0, HorizontalAlignment::Center, VerticalAlignment::Bottom, this);
mpTextSymbol->setOffsetX(10);
mpTextSymbol->setOffsetY(10);
mpLabelItem = new Graphic(Point(0, 0), mpTextSymbol, this);
QString labelStr(GetSource());
labelStr.append("-label");
mpLabelItem->attributes()->insertAttribute("source", labelStr);
mpLabelItem->attributes()->insertAttribute("id", pId);

mpMapViewer->AddToTracksOverlay(mpLabelItem);

However when we try to set text of this textSmbol once in every second, we face the problem of all labels disappearing from the scene after one day.

void PpiTrackItem::SetText()
{
QString mText = QString("T").append(attributes()->attributeValue("id").toString());
mText.append("
");
mText.append("R:");
mText.append(QString::number(AstrxUnitConverter::ConvertMeterToNM(attributes()->attributeValue("range").toDouble()), 'f', 2));
mText.append("nm ");
mText.append("B:");
mText.append(QString::number(attributes()->attributeValue("bearing").toDouble(), 'f', 2));
mText.append("\u00B0");
mText.append("
");
mText.append("S:");
mText.append(QString::number(Calculations::CovertMsToKnots(attributes()->attributeValue("speed").toDouble()), 'f', 2) + " knot");
attributes()->replaceAttribute("text", mText);
mpTextSymbol->setText(mText);
}

GuillaumeBelz · Answer

Hello,

I'm running a 24 hours test to check if I can reproduce the problem (200.2, Windows).

There was a known issue before 100.14 with memory leak in symbols. Maybe it's related. Did you tried an updated version of SDK (last version is 100.15)? Did you see a memory leak?

EDIT: I ran this test more than 30 hours (Windows, 200.2) without problem. It looks like it's specific to an old version of SDK.

FatmaAkdemir · Answer

Hi @GuillaumeBelz ,

We observe the problem after 24 hours of the executable up and working. There are approximately 200 symbols on the view. And version of the SDK is 100.8.

GuillaumeBelz · Answer

Hello, I tried with a new 3D project with C++/Widgets API, on Mac and Windows, with version 200.2, but I can't reproduce the problem. m_graphicsOverlay = new GraphicsOverlay(this); m_sceneView->graphicsOverlays()->append(m_graphicsOverlay); constexpr int N =1000; for (int i = 0; i < N; ++i) { Esri::ArcGISRuntime::TextSymbol* m_symbol = nullptr; m_symbol = new TextSymbol("a symbol", QColor(Qt::red), 10.0, HorizontalAlignment::Center, VerticalAlignment::Bottom, this); m_symbol->setOffsetX(10); m_symbol->setOffsetY(10); m_graphic = new Graphic(Point(randInRange(10000), randInRange(10000), 10000000), m_symbol, this); m_graphic->attributes()->insertAttribute("source", "text in attribute"); m_graphic->attributes()->insertAttribute("id", 1234); m_symbols.push_back(m_symbol); m_graphicsOverlay->graphics()->append(m_graphic); } QTimer *timer = new QTimer(this); connect(timer, &QTimer::timeout, this, [this]() { for (int i = 0; i < N; ++i) { m_symbols[i]->setText(QString::number(randInRange(100000))); } }); timer->start(1000); Can you add more details to reproduce this problem? - Which version of SDK? - How many symbols? - How long to wait to reproduce the problem? Thank you