I finally got my runtime qt app converted over from 100.4 to 100.11. I remember from one of the devsummit briefs that 2525 dictionary symbols were able to be resized in a later release. Is there a sample or code snippet displaying how to resize those dictionary symbols?
There is no sample at the moment. Here is the doc - https://developers.arcgis.com/qt/cpp/api-reference/esri-arcgisruntime-dictionaryrenderer.html#setScaleExpression
Here is an example we have in our tests:
// Simple case... double the size ArcadeExpression* arcadeExpression = new ArcadeExpression("2", this); dictionaryRenderer->setScaleExpression(arcadeExpression); // More advanced case... double the size if the identity_code attribute is 4 ArcadeExpression* arcadeExpression = new ArcadeExpression("iif($feature.Identity_code == 4, 2,1)", this); dictionaryRenderer->setScaleExpression(arcadeExpression);
Here is an Arcade reference you can use to write your expressions - https://developers.arcgis.com/arcade/
Hi Troy. Yes, as Lucas mentioned, there is a new `scaleExpression` method on the Dictionary Renderer that can accept either a constant or an Arcade expression. So it doesn't set your symbol to a specific size, but you can scale all symbols based on a specific value, or use the expression to scale based on an attribute, map scale, etc.
That just cleaned up about 130 lines of janky workaround to resize the symbols
I'm using ArcGis 100.15(Qt) but I'm not able to use 'scaleExpression",
to be clearer:
But if I try to use:
ArcadeExpression* arcadeExpression = new ArcadeExpression("2", this);renderer->setScaleExpression(arcadeExpression);
nothing happens on the screen, the symbol is always drawn with default dimension.
I tryed to setScaleExpression during initialization and during runtime, but also the same result!
Do you have some advice?
It' funny,
I found the solution just after my question.The issue was that I used fetchSymbol to create the symbol inside the Graphics.Instead, the correct way is to fill attribute() of the Graphics with proper properties.
Hi- If you don't need to set the scale based on an attribute value, you can also just use a constant value for setScaleExpression, like this:
renderer->setScaleExpression(2);
Otherwise, yes, you can set the attribute of the graphic and use that in an arcade expression to set the scale.
Kerry
Signed in members can post, follow updates, and more. New here? Register a free account.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.
