注册监听键值 0~9、*、#键

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原创最新推荐文章于 2026-08-15 12:56:41 发布 942 阅读 AI 写同款· GEO 优化 ›

基于键值对模型构建个人数字资产管理框架kvstudio 键值对（Key-Value）是一种基础且灵活的数据模型，它将数据存储为键值对集合，允许值具有任意结构。其核心原理在于通过唯一的键来快速访问对应的值，这种无模式（Schema-less）的特性使其能够轻松适应多变的数据形态。在技术价值上，KV模型提供了极高的灵活性和可控性，非常适合作为构建个性化工具的底层存储方案。在应用场景中，它常被用于需要快速读写和灵活数据结构的场景，例如配置管理、缓存系统和用户偏好设置。本文聚焦于如何利用这一模型，结合SQLite、TypeScript等技术栈，实现一个名为kvstudi 阅读详情

//------------------------------------------头文件------------------------------------------

#ifndef __CAPTURINGKEYS__
#define __CAPTURINGKEYS__

#include <w32std.h>
#include <apgwgnam.h> //CApaWindowGroupName
class MKeyCallBack
    {
public:
    virtual TBool KeyCapturedL(TWsEvent aEvent) = 0;
    };

class CHandleItem
    {
public:
    CHandleItem();
    ~CHandleItem();
    TInt iHandle;
    };

class CKeyCapturer : public CActive
    {
public:
    static CKeyCapturer* NewL(MKeyCallBack& aObserver);
    static CKeyCapturer* NewLC(MKeyCallBack& aObserver);
    virtual ~CKeyCapturer();
private:
    CKeyCapturer(MKeyCallBack& aObserver);
    void ConstructL();
    void RunL();
    void DoCancel();
    void Listen();
private:
    MKeyCallBack& iObserver;
    RWsSession iWsSession;
    RWindowGroup iWg;
    RPointerArray<CHandleItem> iHandleArray;
    };

#endif

//------------------------------------------定义文件------------------------------------------

#include "manager/CapturingKeys.h"

CHandleItem::CHandleItem()
    {

    }

CHandleItem::~CHandleItem()
    {

    }

CKeyCapturer* CKeyCapturer::NewL(MKeyCallBack& aObserver)
    {
    CKeyCapturer* self = CKeyCapturer::NewLC(aObserver);
    CleanupStack::Pop(self);
    return self;
    }

CKeyCapturer* CKeyCapturer::NewLC(MKeyCallBack& aObserver)
    {
    CKeyCapturer* self = new (ELeave) CKeyCapturer(aObserver);
    CleanupStack::PushL(self);
    self->ConstructL();
    return self;
    }

CKeyCapturer::CKeyCapturer(MKeyCallBack& aObserver) :
    CActive(EPriorityStandard/*EPriorityHigh*/), iObserver(aObserver)
    {
    }

CKeyCapturer::~CKeyCapturer()
    {
    //注销
    TInt nCount = iHandleArray.Count();
    for (TInt i = 0; i < nCount; i++)
        {
        if (iHandleArray[i]->iHandle > -1)
            {
            iWg.CancelCaptureKey(iHandleArray[i]->iHandle);
            }
        iHandleArray[i]->iHandle = -1;
        }

    //
    iHandleArray.ResetAndDestroy();

    Cancel();

    iWg.Close();
    iWsSession.Close();
    }

void CKeyCapturer::ConstructL()
    {
    CActiveScheduler::Add(this);

    User::LeaveIfError(iWsSession.Connect());

    iWg = RWindowGroup(iWsSession);
    User::LeaveIfError(iWg.Construct((TUint32) &iWg, EFalse));
    iWg.SetOrdinalPosition(-1);
    iWg.EnableReceiptOfFocus(EFalse);

    CApaWindowGroupName* wn = CApaWindowGroupName::NewLC(iWsSession);
    wn->SetHidden(ETrue);
    wn->SetWindowGroupName(iWg);
    CleanupStack::PopAndDestroy();

    TInt nStart = 0;
    TInt nEnd = 0;

    //0~9
    nStart = 48;
    nEnd = 57;
    for (TInt i = nStart; i <= nEnd; i++)
        {
        CHandleItem * pItem = new (ELeave) CHandleItem;
        pItem->iHandle = iWg.CaptureKey(i, 0, 0);
        //iWg.CaptureLongKey(i, i, 0, 0, 1000000000, ELongCaptureNormal); // to start capturing
        iHandleArray.Append(pItem);
        }

    //注册* #
    CHandleItem * pItem133 = new (ELeave) CHandleItem;
    pItem133->iHandle = iWg.CaptureKey(42, 0, 0);    //可以捕获*
    //pItem133->iHandle = iWg.CaptureKey('*', 0, 0);
    iHandleArray.Append(pItem133);

    CHandleItem * pItem127 = new (ELeave) CHandleItem;
    //pItem127->iHandle = iWg.CaptureKey(127, 0, 0);
    pItem127->iHandle = iWg.CaptureKey('#', 0, 0);
    iHandleArray.Append(pItem127);

    //*、#键比较郁闷，
    //在手机上，*必须注册42
    //在模拟器上，*必须注册133

    Listen();
    }

void CKeyCapturer::RunL()
    {
    if (iStatus == KErrNone)
        {
        TWsEvent e;
        iWsSession.GetEvent(e);

        if (iObserver.KeyCapturedL(e))
            {
            TInt wgId = iWsSession.GetFocusWindowGroup();
            iWsSession.SendEventToWindowGroup(wgId, e);
            }
        }

    if (iStatus != KErrCancel)
        {
        Listen();
        }
    }

void CKeyCapturer::DoCancel()
    {
    iWsSession.EventReadyCancel();
    }

void CKeyCapturer::Listen()
    {
    iWsSession.EventReady(&iStatus);
    SetActive();
    }

//------------------------------------------调用规则------------------------------------------

1.在.h文件中定义CKeyCapturer变量。并继承MKeyCallBack类。在类中实例化KeyCapturedL函数。

2.在.cpp文件的ConstructL中
    //创建监听类
    iKeyCapturer = CKeyCapturer::NewL(*this);

3.在.cpp文件中定义
TBool CSmartDialAppUi::KeyCapturedL(TWsEvent aEvent)
    {
    TInt nKey = aEvent.Key()->iScanCode;

    //查看程序是否可以用
    if (iControl->GetStateApp())
        {
        if ((42 == nKey) || (127 == nKey) || (48 <= nKey && 57 >= nKey))
            {
            //这就是监听到的键值
            }
        }

    return ETrue;
    }