Custom Input Method
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wrote on 14 Jul 2014, 10:23 last edited by
Hello,
I would like to create a custom input method for applications that use the Qt for gui.
What I have learned so far is that I have to subclass the QInputContext (in QT4) and I found this example http://qt-project.org/doc/qt-4.8/tools-inputpanel.html which kind of helps. But is it possible to make other applications use this custom input context without altering the source code?
Thanks for any replies. -
Hi and welcome to devnet,
AFAIK yes, this will require you to create a QInputContextPlugin and then store that plugin in the proper places so Qt can load it.
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wrote on 14 Jul 2014, 11:52 last edited by
Thank you, but how do I make all the desktop applications build on Qt use this plugin and the input context it represents?
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Can you describe your use case with OS and Qt version ?
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wrote on 14 Jul 2014, 12:14 last edited by
Well I would like to create input method that would automatically substitute abbreviated words with full lenght words. It should work as implementation of "zavpis" which is a system of abbreviations developed for quicker keyboard input in the czech language.
OS: Slackware 14.0
Qt 4.8.2 -
Then you can install the plugin in your distribution Qt's and all application will use it
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wrote on 15 Jul 2014, 11:01 last edited by
So I have built a simple input context plugin and put it into QT4DIR/plugins/inputmethods
How do I find out if qt has loaded the plugin? I cant get any application use this plugin. Cant find any qt setting which would make it use this plugin. -
start your application with the environment variable: QT_DEBUG_PLUGINS=1 to see what is happening with the plugins
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wrote on 16 Jul 2014, 09:59 last edited by
Oh thank you for your patience, QT_DEBUG_PLUGINS=1 revealed that the applications look for implementation of reset() method in the QInputContext subclass which they didnt find. So I just put there simple void reset(){} and it works fine now.
Anyway I think there is a little gap in the documentation as I never read anywhere that the input method plugins would get loaded in any application that has an input widget. I was near thinking that only implementation of XIM protocol would meet my requirements. -
Something strange here, reset is a pure virtual function, so to build your QInputContext inherited class you should have implemented this method.
Did you read the "Plugin Classes" page in the documentation ? Might contain more information.
10/10