topic Is a Layer "delegate" type supporting Qt's models in the workings? in Qt Maps SDK Questions

Is a Layer "delegate" type supporting Qt's models in the workings?

MarcoPiccolino1 — Fri, 18 Sep 2015 16:35:26 GMT

A layer supporting the model-view paradigm would greatly improve application structure and logic optimization.

Re: Is a Layer "delegate" type supporting Qt's models in the workings?

LucasDanzinger — Mon, 21 Sep 2015 17:47:54 GMT

Hi Marco,

Can you provide some specifics about what you are after? With the Quartz release, we are looking to embrace the model-view paradigm as much as we can, and have it working in several places throughout the API already. However, any specifics on your suggestion with the layer type and how it would fit in with Qt's models would be greatly appreciated.

Thanks for the feedback.

-Luke

Re: Is a Layer "delegate" type supporting Qt's models in the workings?

MarcoPiccolino1 — Tue, 22 Sep 2015 08:20:34 GMT

I'm thinking about a Layer which supports model-compatible Objects, both derived from QAbstractItemModel, lists and jsons; and delegates responsible for drawing the data.

Pretty much like MapItemView in the QtLocation api, but with support for lists and jsons.

In our common scenario we have a model which is derived from QAbstractItemModel which cointains records that are points of interest and itineraries.

The available delegates should mimic ArcGIS symbols and also allow for custom components.

We represent geometry as a WKT string, so direct support for that is also welcome, to avoid non-optimal runtime conversions.

Does that make sense?

Re: Is a Layer "delegate" type supporting Qt's models in the workings?

LucasDanzinger — Tue, 22 Sep 2015 23:29:03 GMT

Good idea. We have a few ideas on some things we would like to do similar to this. We will look into what it will take to get this done for a future release. Thanks for the input.

-Luke