Beta Test / Technical

[rgleason]

That might be a very good reason to keep Mingw builds, but aren't there other dependencies, or is it just that MSVC is dropping it?

[skipperearly]

I understand from various posts that some issues with 5.0.0 have already been solved but are currently only available via github which requires compilation.
Can anyone advise if such intermediate versions (and plugins) will be made available for downloads as beta versions from opencpn.org and what may be the timescale to be expected?

[Hakan]

skipper..
more info here:

https://www.cruisersforum.com/forums...ml#post3095907

[stevead]

Can someone confirm the expected behaviour of the PluginAPI SetPositionFix.

From my observations, irrespective of the speed unit preferences (Kts, mph, km/h, m/s), the Plugin_Position_Fix member variable Sog is always sent as Kts.

[Rasbats]

A new plugin I am working on needs to download a file in the background and trap the download event, as used in the Chart Downloader plugin of OpenCPN.

error LNK2019: unresolved external symbol "int wxEVT_DOWNLOAD_EVENT" (?wxEVT_DOWNLOAD_EVENT@@3HA) referenced in function

How can I reference 'wxEVT_DOWNLOAD_EVENT' from 'ocpn_plugin.h'

#ifdef MAKING_PLUGIN
extern   DECL_IMP wxEventType wxEVT_DOWNLOAD_EVENT;
#else
extern   DECL_EXP wxEventType wxEVT_DOWNLOAD_EVENT;
#endif

Help would be appreciated.
Thanks.
Mike

[jongough]

I think you will have to do the whole download, including events, in your own plugin. Unless the Chart downloader has an API that you can use to get the events I am not sure there is a way to get an event in another plugin (or even the mainline without 'hacking').

[bdbcat]

Rasbats...


The API-offered download functions work correctly. You should be able to catch the events in your code.


However....

There is a build problem, though, with the wxEVT_DOWNLOAD_EVT. I cannot recall the details at the moment. No time available right now to debug...



Please check the chart downloader source code carefully, and try to replicate its definitions. It is known to work.


Dave

[Rasbats]

Dave ...

To make 'wxEVT_DOWNLOAD_EVT' work I needed to add '#define MAKING_PLUGIN' to the top of 'ocpn_plugin.h'.

On compiling there was an error and '#include <wx/dcmemory.h>' was also needed in 'ocpn_plugin.h'.

#define MAKING_PLUGIN     

#ifdef __WXMSW__
#ifdef MAKING_PLUGIN
#  define DECL_IMP     __declspec(dllimport)
#endif
#endif    

#include <wx/xml/xml.h>

#ifdef ocpnUSE_SVG
#include "wxSVG/svg.h"
#endif // ocpnUSE_SVG

#include <memory>
#include <vector>
 #include <wx/dcmemory.h>

Perhaps 'MAKING_PLUGIN' could have been added to 'CMakeLists.txt': TO_TRY.

Mike

[transmitterdan]

Mike,

You define the MAKiNG_PLUGIN on the command line of CMAKE or in cmakelists.txt. There is need to edit ocpn_plugin.h.

[Rasbats]

tdan ...

Thanks. Adding the definition to 'CMakeLists.txt' works.

Still needed to add '#include <wx/dcmemory.h>' to 'ocpn_plugin.h'.

Could this be added elsewhere?

Mike

[transmitterdan]

Originally Posted by Rasbats

tdan ...

Thanks. Adding the definition to 'CMakeLists.txt' works.

Still needed to add '#include <wx/dcmemory.h>' to 'ocpn_plugin.h'.

Could this be added elsewhere?

Mike

Mike,

I don't think any other plugin complains about wx/dcmemory.h so probably this is something best relegated to the plugin code itself rather than editing ocpn_plugin.h.

In general, it is a bad idea to edit ocpn_plugin.h since this file is supplied by opencpn and not the plugin developer. It will change from time to time thus losing the local edits.

[Rasbats]

tdan ...

Tried using the include in a load of other places without result.

4>c:\plugins - wxwidgets 3.1.2\sailawaynmea_pi\src\ocpn_plugin.h(418): error C2061: syntax error: identifier 'wxMemoryDC'

Had the same issue with 'Survey_pi' when compiling with OpenCPN 5.0 beta.

https://www.cruisersforum.com/forums...?p=2827145#147

Perhaps this is linked with my using Visual Studio Community 2017?

Mike

[transmitterdan]

Originally Posted by Rasbats

tdan ...

Tried using the include in a load of other places without result.

Had the same issue with 'Survey_pi' when compiling with OpenCPN 5.0 beta.

https://www.cruisersforum.com/forums...?p=2827145#147

Perhaps this is linked with my using Visual Studio Community 2017?

Mike

Mike, I apologize for not looking earlier. In the latest github master ocpn_plugin.h does include <wx/dcmemory.h> at line 48. Something must be wrong with the copy you have. Where did you get ocpn_plugin.h?

[Rasbats]

Downloaded OpenCPN 5.0.0 source code and used the 'ocpn_plugin.h' from that source. Same problem with 'dcmemory.h'.

When time allows I will compile and use OpenCPN 5.0.5 alpha and see if the problem persists. No 5.0.5 'opencpn.lib' for testing with the 5.0.5 master 'ocpn_plugin.h' at the moment.

Mike

[Rasbats]

Tested with latest 5.0.522 'opencp.lib' and 'ocpn_plugin.h'. The new plugin compiled fine without modifying 'ocpn_plugin.h'.

Mike