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来自「Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3」· 代码 · 共 19 行

This is a very simple example of how to write a composing input method.
It will convert a sequence of four hex digits to one Unicode character.
Shift+space toggles the input method on/off, and the return key accepts
the composed text. Backspace removes the last composed character.

A proper input method would implement cursor movement and a more
sophisticated state machine, but that would make the code more
complex and harder to understand.

The input method is defined in composeim.h and composeim.cpp

The plugin code is in composeimpl.h and composeimpl.cpp

main.cpp is a stub that allows testing of the input method in isoloation
from the qpe server.

See inputmethods.html for a detailed explanation of creating a Composing
Input Method.