# Help for GTK API Calling **URL:** \ **Category:** Linux\ **Created:** [January 6, 2014, 3:23am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441 "2014-01-06T03:23:45Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 6, 2014, 3:23am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/1 "2014-01-06T03:23:45Z")
I want write a program, and need to check is input method is running (Xojo’s KeyDown event always raised, so that I can’t confirm if user press a key is input Chinese Word or want to move position. ) API URL?[https://developer.gnome.org/gtk3/stable/GtkIMContext.html#gtk-im-context-filter-keypress](https://developer.gnome.org/gtk3/stable/GtkIMContext.html#gtk-im-context-filter-keypress) And I am not sure how to call it correctly… [code]//Soft Declare Function gtk\_im\_multicontext\_new Lib “gtk” () As Ptr Declare Function gtk\_im\_multicontext\_new lib “libgtk-x11-2.0.so” as Ptr //Declare Function gtk\_im\_context\_filter\_keypress lib “libgtk-x11-2.0.so” (GtkIMContext as Ptr, GdkEventKey as Ptr) as Boolean //Declare Function gtk\_im\_context\_filter\_keypress lib “libgtk-x11-2.0.so” () as Boolean Soft Declare Function gtk\_im\_context\_filter\_keypress Lib “gtk” () as Boolean 'Dim im\_context,EventKey As MemoryBlock 'im\_context=gtk\_im\_multicontext\_new() 'Label1.Text=CStr(gtk\_im\_context\_filter\_keypress(im\_context,EventKey)) If gtk\_im\_context\_filter\_keypress()=True Then Label1.Text=“True” Else Label1.Text=“False” End If[/code] Please help~ Thanks~ ---
**Author:** ![jim\_mckay](https://forum.xojo.com/user_avatar/forum.xojo.com/jim_mckay/32/905_2.png) [@jim\_mckay](https://forum.xojo.com/u/jim_mckay)\ **Post date:** [January 6, 2014, 3:43pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/2 "2014-01-06T15:43:27Z")
I think you need to override the event handler to get EventKey. Not sure how to do that in Linux… or if it’s even possible via declares. Might require a plugin. Maybe MBS can help? [https://developer.gnome.org/gtkmm-tutorial/3.4/sec-keyboardevents-overview.html.en](https://developer.gnome.org/gtkmm-tutorial/3.4/sec-keyboardevents-overview.html.en) ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 4:04am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/3 "2014-01-07T04:04:46Z")
I know there’s GdkEventKey struct, but I’m don’t how do it with xojo… ~"~ [https://developer.gnome.org/gdk/stable/gdk-Event-Structures.html#GdkEventKey](https://developer.gnome.org/gdk/stable/gdk-Event-Structures.html#GdkEventKey) And I tried MBS Plugin, same as KeyDown/KeyUp problem, I can’t difference it’s in input method or not… ---
**Author:** ![Norman\_P](https://forum.xojo.com/letter_avatar_proxy/v4/letter/n/858c86/32.png) [@Norman\_P](https://forum.xojo.com/u/Norman_P)\ **Post date:** [January 7, 2014, 4:28am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/4 "2014-01-07T04:28:12Z")
Are you trying to capture keys in a text field or text area & decide ? ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 5:04am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/5 "2014-01-07T05:04:29Z")
I capture keys in a TextField(1) , and I want to move to next TextField(2) when user press ? . But when user press down, he may choice a word in input method, also may really want to go next TextFiled… ---
**Author:** ![Norman\_P](https://forum.xojo.com/letter_avatar_proxy/v4/letter/n/858c86/32.png) [@Norman\_P](https://forum.xojo.com/u/Norman_P)\ **Post date:** [January 7, 2014, 5:09am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/6 "2014-01-07T05:09:05Z")
Well then I’ll ask “does this work correctly in the code editor in the IDE on Linux ?” If it does then you might want to NOT use a TextArea and consider using the TextInputCanvas. If it does not then I’d guess we have an issue we need to fix in the text input canvas. ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 5:46am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/7 "2014-01-07T05:46:59Z")
I think there’s no issue with everything, the keyboard is pressed surely, so that KeyDown/KeyUp raised is correct. So it’s not only happen in Linux, also happen in Mac/Windows. In my think, I want to use API to check if user in input method, so I found the “gtk-im-context-filter-keypress”. Now I will try TextInputCanvas, if I make sense how it compiler… ---
**Author:** ![Norman\_P](https://forum.xojo.com/letter_avatar_proxy/v4/letter/n/858c86/32.png) [@Norman\_P](https://forum.xojo.com/u/Norman_P)\ **Post date:** [January 7, 2014, 6:04am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/8 "2014-01-07T06:04:36Z")
I can say that in OS X the only way to make this work is to use the TextInputCanvas as you cannot handle input methods without it I’m not certain that is true on Linux & Windows ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 6:25am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/9 "2014-01-07T06:25:42Z")
I still had no idea how TextInputCanvas compiler… In Xcode, It’s shows 2 warnning, but said success. (and I don’t find where it is.) [http://i.imgur.com/HcEzxHy.png](http://i.imgur.com/HcEzxHy.png) In Ubuntu, It’s shows no gtk±2.0 package, I will try build in other version of linux. [http://i.imgur.com/OOAtBCv.jpg](http://i.imgur.com/OOAtBCv.jpg) ---
**Author:** ![Mike\_Cotrone](https://forum.xojo.com/user_avatar/forum.xojo.com/mike_cotrone/32/19940_2.png) [@Mike\_Cotrone](https://forum.xojo.com/u/Mike_Cotrone)\ **Post date:** [January 7, 2014, 6:39am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/10 "2014-01-07T06:39:26Z")
[TextInputCanvas Compiled Plugin](https://xojo.io/0b6176d272e7) HTH. ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 7:10am UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/11 "2014-01-07T07:10:33Z")
WOW!! Thanks a lot. I’ll try it~ ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 2:20pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/12 "2014-01-07T14:20:33Z")
Not work in Linux, seems I had to try compiler it under Ubuntu. ---
**Author:** ![Mike\_Cotrone](https://forum.xojo.com/user_avatar/forum.xojo.com/mike_cotrone/32/19940_2.png) [@Mike\_Cotrone](https://forum.xojo.com/u/Mike_Cotrone)\ **Post date:** [January 7, 2014, 3:43pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/13 "2014-01-07T15:43:21Z")
Yes sorry It was late and I forgot to add that I compiled it on Mac OS with XCode 5. ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 3:55pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/14 "2014-01-07T15:55:36Z")
You don’t need to say that. Very thanks for your help. I don’t know even how to compiler in XCode. ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 7:05pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/15 "2014-01-07T19:05:25Z")
Compiled successful. Enter ‘make’ command at same Folder in Terminal. If it show’s no gtk2 lib, run ‘sudo apt-get install libgtk2.0-dev’. Then you will get a .so file as a plug-in. ---
**Author:** ![Mike\_Cotrone](https://forum.xojo.com/user_avatar/forum.xojo.com/mike_cotrone/32/19940_2.png) [@Mike\_Cotrone](https://forum.xojo.com/u/Mike_Cotrone)\ **Post date:** [January 7, 2014, 7:20pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/16 "2014-01-07T19:20:43Z")
Great job EShen! ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 7:22pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/17 "2014-01-07T19:22:56Z")
Thanks. 🙂 Now I’m finding documents of this control… Trying how to input with it… ~"~ ---
**Author:** ![Mike\_Cotrone](https://forum.xojo.com/user_avatar/forum.xojo.com/mike_cotrone/32/19940_2.png) [@Mike\_Cotrone](https://forum.xojo.com/u/Mike_Cotrone)\ **Post date:** [January 7, 2014, 7:29pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/18 "2014-01-07T19:29:25Z")
This is a good thread from Norman and Joe of Xojo talking about what documentation there is for it. [TextInputCanvas Info Thread](https://forum.xojo.com/3485-syntaxhighlighteditfield/0) HTH ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 7:56pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/19 "2014-01-07T19:56:03Z")
Very useful. I’m reading. Thank you~~ ---
**Author:** ![EShen\_Shiou](https://forum.xojo.com/user_avatar/forum.xojo.com/eshen_shiou/32/7645_2.png) [@EShen\_Shiou](https://forum.xojo.com/u/EShen_Shiou)\ **Post date:** [January 7, 2014, 8:39pm UTC](https://forum.xojo.com/t/help-for-gtk-api-calling/13441/20 "2014-01-07T20:39:46Z")
Still had no idea how to use it… \<(???)"a Many Events look like methods and properties. Are there any examples? [Next page](https://forum.xojo.com/t/help-for-gtk-api-calling/13441.md?page=2)