topic Re: UniqueValueRenderer does not work on DynamicEntityLayer's track line renderer in Qt Maps SDK Questions

UniqueValueRenderer does not work on DynamicEntityLayer's track line renderer

FatmaAkdemir — Mon, 12 May 2025 08:15:46 GMT

auto* uniqueValue1 = new UniqueValue("Cat 11", "Cat 11", QVariantList() << "Cat 11", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::X, QColor(Qt::darkYellow), 12.0, this), this); auto* uniqueValue2 = new UniqueValue("Cat 20", "Cat 20", QVariantList() << "Cat 20", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::X, QColor(Qt::darkGreen), 12.0, this), this); auto* uniqueValue3 = new UniqueValue("Cat 21", "Cat 21", QVariantList() << "Cat 21", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::X, QColor(Qt::darkBlue), 12.0, this), this); auto* uniqueValue4 = new UniqueValue("Cat 48", "Cat 48", QVariantList() << "Cat 48", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::X, QColor(Qt::darkMagenta), 12.0, this), this); auto* uniqueValue5 = new UniqueValue("Cat 62", "Cat 62", QVariantList() << "Cat 62", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::X, QColor(Qt::darkCyan), 12.0, this), this); auto* history1 = new UniqueValue("Cat 11", "Cat 11", QVariantList() << "Cat 11", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::darkYellow), 4.0, this), this); auto* history2 = new UniqueValue("Cat 20", "Cat 20", QVariantList() << "Cat 20", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::darkGreen), 4.0, this), this); auto* history3 = new UniqueValue("Cat 21", "Cat 21", QVariantList() << "Cat 21", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::darkBlue), 4.0, this), this); auto* history4 = new UniqueValue("Cat 48", "Cat 48", QVariantList() << "Cat 48", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::darkMagenta), 4.0, this), this); auto* history5 = new UniqueValue("Cat 62", "Cat 62", QVariantList() << "Cat 62", new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::darkCyan), 4.0, this), this); auto* line1 = new UniqueValue("Cat 11", "Cat 11", QVariantList() << "Cat 11", new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::darkYellow), 2.0, this), this); auto* line2 = new UniqueValue("Cat 20", "Cat 20", QVariantList() << "Cat 20", new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::darkGreen), 2.0, this), this); auto* line3 = new UniqueValue("Cat 21", "Cat 21", QVariantList() << "Cat 21", new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::darkBlue), 2.0, this), this); auto* line4 = new UniqueValue("Cat 48", "Cat 48", QVariantList() << "Cat 48", new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::darkMagenta), 2.0, this), this); auto* line5 = new UniqueValue("Cat 62", "Cat 62", QVariantList() << "Cat 62", new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::darkCyan), 2.0, this), this); // Add the unique values to the renderer auto* uniqueRenderer = new UniqueValueRenderer("", new SimpleMarkerSymbol(this), QStringList() << "source", QList<UniqueValue*>() << uniqueValue1 << uniqueValue2 << uniqueValue3 << uniqueValue4 << uniqueValue5, this); auto* uniqueRendererHistory = new UniqueValueRenderer("", new SimpleMarkerSymbol(this), QStringList() << "source", QList<UniqueValue*>() << history1 << history2 << history3 << history4 << history5, this); auto* uniqueRendererTrajectory = new UniqueValueRenderer("", new SimpleLineSymbol(this), QStringList() << "source", QList<UniqueValue*>() << line1 << line2 << line3 << line4 << line5, this); mpDynamicEntityLayer->setRenderer(uniqueRenderer); mpDynamicEntityLayer->trackDisplayProperties()->setPreviousObservationRenderer(uniqueRendererHistory); mpDynamicEntityLayer->trackDisplayProperties()->setTrackLineRenderer(uniqueRendererTrajectory);

At line 25 I'm trying to give different colors to track lines for different categories of tracks, but it does not work. What am I missing?

Re: UniqueValueRenderer does not work on DynamicEntityLayer's track line renderer

JamesBallard1 — Thu, 15 May 2025 17:42:45 GMT

@FatmaAkdemir

Currently only the track id field is supported on track lines with attribute renderers like unique value renderers.

Also take a look at the attribute values... Possibly the label field is where the field name should be (like "Cat 11" with a value of "Cat 11"). If the track id was say, "Category" and the value was "Cat 11", then I would expect something like

UniqueValue("Category", "Category", QVariantList() << "Cat 11", new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::darkYellow), 2.0, this), this);

to work.

Re: UniqueValueRenderer does not work on DynamicEntityLayer's track line renderer

FatmaAkdemir — Fri, 16 May 2025 13:20:19 GMT

Thank you very much @JamesBallard1. In fact track ids are string values starting with 2 digits of category number. Is there a way to render track lines according to the first 2 characters of track ID attribute?

Re: UniqueValueRenderer does not work on DynamicEntityLayer's track line renderer

JamesBallard1 — Thu, 22 May 2025 15:09:43 GMT

@FatmaAkdemir I checked with our experts in this area, and it doesn't appear possible to do what you're asking about, unfortunately.

It might be possible to use a DictionaryRenderer with a custom dictionary style to parse out the category from the field on-the-fly and return different symbols based on that, but I can't say for certain that would work, and it would be a major reworking of how your data is structured to prototype it.

Re: UniqueValueRenderer does not work on DynamicEntityLayer's track line renderer

KerryRobinson — Thu, 22 May 2025 20:57:07 GMT

Hi Fatma,

There is the option to use a Unique Value Renderer but with a `valueExpression` which can parse out the first 2 characters of the track ID and use that to determine the values. Unfortunately we do not yet support setting `valueExpression` in the API, however you can create the renderer from JSON and it will work. (use renderer.fromJson();)

Here is a sample JSON that uses the right 4 characters of a track ID to create the unique values:

{ "defaultSymbol": { "symbol": { "symbolLayers": [ { "anchor3D": "Center", "capStyle": "Round", "color": [ 130, 130, 130, 255 ], "colorLocked": false, "enable": true, "height3D": 1, "joinStyle": "Round", "lineStyle3D": "Strip", "miterLimit": 10.0, "type": "CIMSolidStroke", "width": 3.0 } ], "type": "CIMLineSymbol" }, "type": "CIMSymbolReference" }, "fieldDelimiter": ",", "type": "uniqueValue", "valueExpression": "RIGHT($feature.vehiclename,4)", "valueExpressionTitle": "Custom", "uniqueValueInfos": [ { "label": "2043", "symbol": { "symbol": { "symbolLayers": [ { "anchor3D": "Center", "capStyle": "Round", "color": [ 46, 194, 194, 255 ], "colorLocked": false, "enable": true, "height3D": 1, "joinStyle": "Round", "lineStyle3D": "Strip", "miterLimit": 10.0, "type": "CIMSolidStroke", "width": 3.0 } ], "type": "CIMLineSymbol" }, "type": "CIMSymbolReference" }, "value": "2043" }, { "label": "2421", "symbol": { "symbol": { "symbolLayers": [ { "anchor3D": "Center", "capStyle": "Round", "color": [ 82, 43, 194, 255 ], "colorLocked": false, "enable": true, "height3D": 1, "joinStyle": "Round", "lineStyle3D": "Strip", "miterLimit": 10.0, "type": "CIMSolidStroke", "width": 3.0 } ], "type": "CIMLineSymbol" }, "type": "CIMSymbolReference" }, "value": "2421" }, { "label": "3018", "symbol": { "symbol": { "symbolLayers": [ { "anchor3D": "Center", "capStyle": "Round", "color": [ 198, 48, 60, 255 ], "colorLocked": false, "enable": true, "height3D": 1, "joinStyle": "Round", "lineStyle3D": "Strip", "miterLimit": 10.0, "type": "CIMSolidStroke", "width": 3.0 } ], "type": "CIMLineSymbol" }, "type": "CIMSymbolReference" }, "value": "3018" }, { "label": "4008", "symbol": { "symbol": { "symbolLayers": [ { "anchor3D": "Center", "capStyle": "Round", "color": [ 186, 201, 62, 255 ], "colorLocked": false, "enable": true, "height3D": 1, "joinStyle": "Round", "lineStyle3D": "Strip", "miterLimit": 10.0, "type": "CIMSolidStroke", "width": 3.0 } ], "type": "CIMLineSymbol" }, "type": "CIMSymbolReference" }, "value": "4008" } ] }

Hope that helps!