Qt C++ Widgets Samples

[RitvikRanadive]

Hi,

Are there any Qt C++ Widgets samples for -

1. Generating offline map for preplanned area and storing it locally

2. Generating offline map on-demand and storing it locally

3. Loading a stored offline map

4. Get GPS coordinates from user inputs like mouse click 

[LucasDanzinger]

We don't have specific Widgets samples for these, but we have C++ Qt Quick samples. The actual code to perform these is nearly identical (the only difference between Widgets and Qt Quick is MapQuickView and MapGraphicsView class). 

Offline map on demand - https://github.com/Esri/arcgis-runtime-samples-qt/tree/main/ArcGISRuntimeSDKQt_CppSamples/Maps/Gener... 

Preplanned offline map - https://github.com/Esri/arcgis-runtime-samples-qt/tree/main/ArcGISRuntimeSDKQt_CppSamples/Maps/Downl... 

Load mobile map package - https://github.com/Esri/arcgis-runtime-samples-qt/tree/main/ArcGISRuntimeSDKQt_CppSamples/Maps/OpenM... 

Get coordinates from mouse click - connect to the mouse clicked signal (https://developers.arcgis.com/qt/cpp/api-reference/esri-arcgisruntime-mapgraphicsview.html#mouseClic...) and then call screenToLocation to convert the screen point to map point https://developers.arcgis.com/qt/cpp/api-reference/esri-arcgisruntime-mapview.html#screenToLocation 

[RitvikRanadive]

Hi @LucasDanzinger thanks for the response, I was looking for Widgets samples as I didn't want to involve QMLs. Is this actually even possible?

[LucasDanzinger]

Yes, it's definitely possible. The actual C++ back end code will be nearly identical. You can disregard the QML portions of the samples, as those are just the UI - you'd use Qt Widgets for your UI instead.

[RitvikRanadive]

Does the GenerateOfflineMap example actually create the .mmpk which the OpenMobileMap_MapPackage example requires..?

Since the GenerateOfflineMap example was generating the files in tmp, I updated the path to a different path on my drive. When I check this path after running the example, there is no .mmpk file in this path. There is a .mmap file in the one of the subdirectories but this does not work with the OpenMobileMap_MapPackage example.

What am I doing wrong here?

[LucasDanzinger]

The data is available for download on ArcGIS Online. Details are in the sample readme - https://github.com/Esri/arcgis-runtime-samples-qt/tree/main/ArcGISRuntimeSDKQt_CppSamples/Maps/OpenM... 

[RitvikRanadive]

Hi, the details from the sample readme file are only for the Yellowstone map that is in the example. How can I generate this .mmpk file for any other map that I have created on my account in Map Viewer?

[RitvikRanadive]

Hi @LucasDanzinger

Please correct me if I am wrong but I need to have ArcGIS Pro in order to create an .mmpk file for a map that I have created?

[LucasDanzinger]

You can create a MMPK in Pro.

You can also generate one on-demand from a web map using our OfflineMapTask. This sample demonstrates how to do this https://github.com/Esri/arcgis-runtime-samples-qt/tree/main/ArcGISRuntimeSDKQt_CppSamples/Maps/Gener... 

[RitvikRanadive]

yeah but the on demand web map using the OfflineMapTask gets deleted after the program exits, I would like to store the maps in a location on my hard drive from where I can load them completely offline at a later point.