symbian 如何检测编辑框的当前输入法类型

当我们进行全屏程序开发的时候，对编辑框中当前的输入法要时行判断，以方便我们在界面上贴图表现，通过下面的三步可以完成这个功能：

1、在.h文件中加入相关的头文件
#include <eikenv.h>   // for CAknEnv::Static()
#include <aknindicatorcontainer.h>   //for CAknIndicatorContainer

2、在.h文件中加入用到的类定义
struct S_uid: public TUid
{
        S_uid(int i)
        {
                iUid = i;
        }
};

enum TAknEditingState
{
EStateNone,
ET9Upper,
ET9Lower,
ET9Shifted,
ENumeric,
EMultitapUpper,
EMultitapLower,
EMultitapShifted,
};

class MAknEditingStateIndicator
{
public:
        virtual void SetState(TAknEditingState aState) = 0;
        virtual CAknIndicatorContainer *IndicatorContainer() = 0;
};

在系统的头文件（C:/Symbian/7.0s/Series60_v20/Epoc32/include/aknenv.h ）中类CAknEnv用到了类MAknEditingStateIndicator，但SDK中没有提供这个类定义，所以要在这里加上。

3、在.cpp文件中实现

#include <aknenv.h>

void TestInputMethod()
{
        MAknEditingStateIndicator * ei = CAknEnv::Static()->EditingStateIndicator() ;
        if (!ei)   return;

        CAknIndicatorContainer *ic = ei->IndicatorContainer();       
        if (!ic)   return;

        if(ic->IndicatorState(S_uid(EAknNaviPaneEditorIndicatorT9) ))
        {
                //to do ... if input method = T9 (即拼音和笔画)
        }
        else if(ic->IndicatorState(S_uid(EAknNaviPaneEditorIndicatorLowerCase)))
        {
                //to do ... if input method = "abc";
        }
        else if(ic->IndicatorState(S_uid(EAknNaviPaneEditorIndicatorUpperCase)))
        {
                //to do ... if input method = "ABC";
        }
        else if(ic->IndicatorState(S_uid(EAknNaviPaneEditorIndicatorTextCase)))
        {
                //to do ... if input method =  "Abc";
        }
        else if(ic->IndicatorState(S_uid(EAknNaviPaneEditorIndicatorNumberCase)))
        {
                //to do ... if input method =  "123";
        }
}
  用这种方法，当前的输入法是拼音和笔画时，IndicatorState(S_uid(EAknNaviPaneEditorIndicatorT9) )都为TRUE，因为输入法的切换是按一定的顺序的，所以可以考虑用顺序来进一步判断这两种输入法。

在SDK中的目录C:/Symbian/7.0s/Series60_v20/Epoc32/include/avkon.hrh（或C:/Symbian/8.0a/S60_2nd_FP2_SC/epoc32/include/avkon.hrh）中定义上面用到的一些枚举值。
    // Navi pane editor indicators
    EAknNaviPaneEditorIndicatorT9 = 100,
    EAknNaviPaneEditorIndicatorUpperCase,
    EAknNaviPaneEditorIndicatorLowerCase,
    EAknNaviPaneEditorIndicatorTextCase,
    EAknNaviPaneEditorIndicatorNumberCase,
    EAknNaviPaneEditorIndicatorQuery,
    EAknNaviPaneEditorIndicatorQwertyShift,

    EAknNaviPaneEditorIndicatorArabicCase = 130,
    EAknNaviPaneEditorIndicatorHebrewCase,
    EAknNaviPaneEditorIndicatorArabicIndicNumberCase,

另一种实现方法:
TCoeInputCapabilities iInputCapabilities = iEikEdwin->InputCapabilities();
if (iInputCapabilities.FepAwareTextEditor())
{

CAknEdwinState* EditorState= STATIC_CAST(CAknEdwinState*,
iInputCapabilities.FepAwareTextEditor()->Extension1()->State(KNullUid));
TInt editorMode = EditorState->CurrentInputMode();

if (editorMode== EAknEditorNullInputMode)
editorMode= EAknEditorPinYinInputMode ;//EditorState->DefaultInputMode();
/*iCurrentInputMode.Zero();
iCurrentInputMode.AppendNum(editorMode);
iEikonEnv->InfoMsg(iCurrentInputMode);*/
switch(editorMode)
{
case EAknEditorNumericInputMode:
{
iEikonEnv->InfoMsg(_L("ENumericInputMode"));
}
break;
case EAknEditorPinYinInputMode:
{
//iEikonEnv->InfoMsg(_L("pinyin"));
}
break;
case EAknEditorStrikeInputMode:
{
//iEikonEnv->InfoMsg(_L("strike"));
}
break;
case EAknEditorLetterInputMode:
case EAknEditorTextInputMode:
case EAknEditorSecretAlphaInputMode:
{
//iEikonEnv->InfoMsg(_L("letter"));
}
break;
case EAknEditorNullInputMode:
{
iEikonEnv->InfoMsg(_L("ENullInputMode"));
}
break;

default:
break;
}
// ensure editor is aware of new fepmode
//EditorState()->SetCurrentInputMode(editorMode);
}
else // no FepAwareTextEditor
{
if (iInputCapabilities.SupportsWesternNumericIntegerPositive() ||
iInputCapabilities.SupportsWesternNumericIntegerNegative())
{
// Do something here to handle numeric number control
}
else if (iInputCapabilities.SupportsSecretText())
{
// Do something here to handle secret text control
}
else
{
}
}