QPlugin

MTK358 · 08-27-2010, 03:19 PM

I wrote a test app that scans for plugins in a directory, calls their getWidget() method (implemented in my interface), and adds that widget to a layout.

The problem is that when I added a QTimer to my plugin class, it didn't work! Why?

And will it be easier to write the thing in Python and not use QPlugin? I just want to define a QWidget and have it added to the app.

Sergei Steshenko · 08-27-2010, 05:09 PM

Quote:

Originally Posted by MTK358

...
The problem is that when I added a QTimer to my plugin class, it didn't work! Why?
...

What did you do to debug the issue ?

MTK358 · 08-27-2010, 07:04 PM

I have no clue how to debug it.

Sergei Steshenko · 08-27-2010, 07:30 PM

Quote:

Originally Posted by MTK358

I have no clue how to debug it.

???

Code:

frpintf(stderr, "whatever diagnostic message\n");

or its C++ friend

Code:

cerr << "whatever diagnostic message\n"

still work, or something happened in this world ?

MTK358 · 08-27-2010, 07:30 PM

I know that the slots are not called.

Sergei Steshenko · 08-27-2010, 07:31 PM

Quote:

Originally Posted by MTK358

I know that the slots are not called.

So, you need to get into guts of the slots mechanism.

MTK358 · 08-27-2010, 07:39 PM

I don't understand the plugins mechanism.

Sergei Steshenko · 08-27-2010, 07:42 PM

Quote:

Originally Posted by MTK358

I don't understand the plugins mechanism.

Assuming the plugin is a .so file you need to enter

linux dynamic libraries howto
linux dynamic libraries how to

into your favorite WEB search engine and read the articles. AFAIR the TLDP site gives a pretty a good explanation.

graemef · 08-28-2010, 09:46 AM

From reading your post it is not clear (to me) what type of plugin are you trying to develop?

Have you read the help files on the plugin framework?
Have you tried the plugin tutorials first?