HotKey Control For Windows Mobile

Windows CE 3.0 及以后版本均可用！

此控件显示一文本框用户于捕获用户按键，常用于程序的设置功能（设置HotKey）。

可捕获除关机键外的任何按键。

用法：
CMS_HotKeyEdit::RegisterClass(hInstance); //注册窗口类，之后就可以用CreateWindow创建控件了。

#define MSHKM_GETKEY WM_USER+101    //获取字符
#define MSHKM_SETKEY WM_USER+102    //设置字符 wParam为字符

/*
 * HotKey Control
 * 2009.04.20 By Frank
 * Mood Sunshiny Workroom
 * Http://Www.MoodSun.Cn/
 *
 * Default Style(For Custom Control): 0x50810080
 * ClassName: MS_HotKeyEdit
*/
static class CMS_HotKeyEdit
{
private:
    static WNDPROC m_OldWinProc; //原窗口处理过程

    static LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

public:
    static BOOL RegisterClass(HINSTANCE hInstance);
};

#include "StdAfx.h"
#include "MS_HotKeyEdit.h"
#include <gx.h>
#pragma comment(lib,"gx.lib")

WNDPROC CMS_HotKeyEdit::m_OldWinProc=NULL;

LRESULT CALLBACK CMS_HotKeyEdit::WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch(uMsg)
    {
    case WM_CREATE:
        {
            /*设置只读*/
            LONG lOldLong=GetWindowLong(hwnd,GWL_STYLE);
            if((lOldLong&ES_READONLY)!=ES_READONLY)SetWindowLong(hwnd,GWL_STYLE,lOldLong|ES_READONLY);
            break;
        }
    case WM_SETFOCUS:
        GXOpenInput(); //接管硬件按键
        break;

    case WM_KILLFOCUS:
        GXCloseInput();
        break;

    case WM_KEYUP:
        {
            //通知父窗口内容变化
            HWND hParent=NULL;
            if(!(hParent=GetParent(hwnd)))
            {
                throw TEXT("此控件必须做为子控件！");
            }
            NMHDR nmd={hwnd,GetDlgCtrlID(hwnd),(DWORD)wParam};
            LRESULT lRS=SendMessage(hParent,WM_NOTIFY,nmd.idFrom,(LPARAM)&nmd);

            //给父窗口一个机会决定是否允许此HotKey
            if(lRS==S_OK)
            {
                //设置新值到文本
                TCHAR tcTxt[2]={0,0};
                tcTxt[0]=(TCHAR)wParam;
                SetWindowText(hwnd,tcTxt);
            }
            break;
        }

    case MSHKM_GETKEY:
        {
            TCHAR tcTxt[2]={0,0};
            GetWindowText(hwnd,tcTxt,2);
            return (LRESULT)(tcTxt[0]==TEXT('无')?0:tcTxt[0]);
        }
    case MSHKM_SETKEY:
        {
            TCHAR tcTxt[2]={0,0};
            tcTxt[0]=wParam==0?TEXT('无'):(TCHAR)wParam;
            SetWindowText(hwnd,tcTxt);
            return S_OK;
        }
    }
    
    return CallWindowProc(m_OldWinProc,hwnd,uMsg,wParam,lParam);
}

BOOL CMS_HotKeyEdit::RegisterClass(HINSTANCE hInstance)
{
    WNDCLASS wc;
    if(!GetClassInfo(hInstance,TEXT("EDIT"),&wc))return FALSE;

    m_OldWinProc=wc.lpfnWndProc;
    wc.hInstance=hInstance;
    wc.lpszClassName = TEXT("MS_HotKeyEdit");
    wc.lpfnWndProc = WindowProc;

    // 注册自定义类
    return (::RegisterClass(&wc) != 0);
}