[Qgis-developer] Using QgsCategorizedSymbolRendererV2

hubbatov hubbatov at mail.ru
Wed Oct 30 11:43:16 PDT 2013


Hi!

I write on C++.

Question: how to use QgsCategorizedSymbolRendererV2?
Input data: 
1. Some features with unique fields (for example QgsField("id",
QVariant::String))
2. QgsVectorLayer with "memory" data provider and "Polygon" items
Task:
I need to draw this features with different colors.
Now i have such code:

QgsCategoriesList categories;

//for all ids create new category with new QgsSymbolV2 with unique color

QgsCategorizedSymbolRendererV2* renderer = new
QgsCategorizedSymbolRendererV2("id", categories);
myLayer->setRendererV2(renderer);

Any ideas?
Thanks




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