How to recognize chinese keyboard [solved]

Jozzolo

Hello!

Is there a way in Qt to determine if the user is writing with a different InputMethod? For Exemple Qt can tell me if they are using pinyin?

Thanks!!!

Huulivoide

QInoutMethod class might be of some help.
What do you plan to do with the information?

Jozzolo

Hi.
Thank you for the answer.

I could not really find such information from QInputMethod...
Anyway I have a bug in a QTableView + QStyledItemDelegate for the chinese users.
When the tableview is triggered with QAbstractItemView::EditTrigger::AnyKeyPressed, the key is not sent to pinyin, but directly written in the QLineEdit.

As a result they have something like this:
f 啊让人

the f is the char that fired up my QLineEdit.

Huulivoide

Well even if there was/is a proper way to query the input method that is in use,
you would need a really long list of all possible input methods that builds the
characters from compounds. I think the easiest way would simply to use DoubleClick
instead if AnyKeyPressed. For me personally it would seem illogical to try to input
new text to what appears to be a read only field. Even better would simply be to
activate the edit mode when ever a cell is selected CurrentChanged.

Jozzolo

Qt currently does not have the capabilities to detect if a key is pressed... the same does not have the capabilities I need.
So I had to use native code:

#ifdef Q_OS_WIN
#include "Windows.h"
#endif
...

bool MyTableView::edit(const QModelIndex & index, EditTrigger trigger, QEvent * ev)
{
  if (trigger == AnyKeyPressed)
  {
#ifdef Q_OS_WIN
    HKL lang_id = GetKeyboardLayout(0); // get the current keyboard layout
    unsigned short prim_lang = LOBYTE(lang_id); //take only the primary language identifier

    switch (bytes.toInt())
    {
      case 0x04: //Chinese
      case 0x11: //Japanese
      /* maybe other future languages that use special input methods */

        //clear current content, then the editor will be open with pinyin activated
        QKeyEvent* toSend = new QKeyEvent(QEvent::KeyPress, Qt::Key_Delete, Qt::NoModifier); 
        return QAbstractItemView::edit(index, trigger, toSend);
    }
#endif
  }
  return QAbstractItemView::edit (index, trigger, ev);
}