MobileRead Forums - View Single Post - Attn plugin developers: calibre moving to Qt 5

kovidgoyal · 07-06-2014, 03:48 AM

Hi all,

calibre will soon be moving to using Qt 5 in place of Qt 4 as its GUI library. If you have created plugins that use the GUI (User Interface plugins) then you will need to do a little porting to have your plugins work with both Qt 4 and Qt 5. The porting work is mostly mechanical search and replace, unless you happen to use some obscure corners of Qt. In the next post of this thread, I will add a guide to cover the most common porting tasks.

Beta builds of calibre with Qt 5 are available here:

http://download.calibre-ebook.com/betas/

The betas are fully compatible with current stable calibre releases, in that you can use them on the same library/configuration folder with no problems (indeed my family and I have been running the Qt 5 based calibre code base for almost two months). However, if you want to be doubly cautious, use the portable install with a special test library.

I encourage you to port your plugins as soon as possible so that when calibre 2.0 is released, which will use Qt 5, your plugins will continue to work.

I am happy to help you with any issues you encounter during porting. Feel free to post in this thread with questions, and I will answer them to the best of my ability.

Finally, these are beta builds, and because of the large numbers of OSes that calibre supports I haven't been able to test them on everything, so if you notice any bugs feel free to let me know.

The status of the plugin porting effort can be monitored here: http://plugins.calibre-ebook.com/porting.html

07-06-2014, 03:48 AM	#1
kovidgoyal creator of calibre Posts: 43,858 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Attn plugin developers: calibre moving to Qt 5 Hi all, calibre will soon be moving to using Qt 5 in place of Qt 4 as its GUI library. If you have created plugins that use the GUI (User Interface plugins) then you will need to do a little porting to have your plugins work with both Qt 4 and Qt 5. The porting work is mostly mechanical search and replace, unless you happen to use some obscure corners of Qt. In the next post of this thread, I will add a guide to cover the most common porting tasks. Beta builds of calibre with Qt 5 are available here: http://download.calibre-ebook.com/betas/ The betas are fully compatible with current stable calibre releases, in that you can use them on the same library/configuration folder with no problems (indeed my family and I have been running the Qt 5 based calibre code base for almost two months). However, if you want to be doubly cautious, use the portable install with a special test library. I encourage you to port your plugins as soon as possible so that when calibre 2.0 is released, which will use Qt 5, your plugins will continue to work. I am happy to help you with any issues you encounter during porting. Feel free to post in this thread with questions, and I will answer them to the best of my ability. Finally, these are beta builds, and because of the large numbers of OSes that calibre supports I haven't been able to test them on everything, so if you notice any bugs feel free to let me know. The status of the plugin porting effort can be monitored here: http://plugins.calibre-ebook.com/porting.html Last edited by kovidgoyal; 07-18-2014 at 03:19 AM.