子窗口控件(5)之编辑类and列表框类
子窗口控件中
wParam和lParam变量的含义
| LOWORD(wParam) | 子窗口ID |
| HIWORD(wParam) | 通知码 |
| lParam | 子窗口句柄 |
编辑控件的通知消息
| EN_SETFOCUS | 编辑控件得到了输入焦点 |
| EN_KILLFOCUS | 失去了输入焦点 |
| EN_CHANGE | 编辑框的内容将变化 |
| EN_UPDATE | 内容已经变化 |
| EN_ERRSPACE | 编辑框没有空间了 |
| EN_MAXTEXT | 没有控件完成插入了 |
| EN_HSCROLL | 水平滚动条被单击了 |
| EN_VSCROLL | 垂直滚动条被单击了 |
常用函数
SendMessage(hwndEdit,WM_CUT,0,0);//剪切 SendMessage(hwndEdit,WM_COPY,0,0);//复制 SendMessage(hwndEdit,WM_CLEAR,0,0);//删除 SendMessage(hwndEdit,WM_PASTE,0,0);//粘贴
获取编辑器的行数
iCount=SendMessage(hwndEdit,EM_GETLINECOUNT,0,0);//获取行数 iOffset=SendMessage(hwndEdit,EM_LINEINDEX,iLine,0);//获取位移量 iLength=SendMessage(hwndEdit,EM_LINELENGTH,iLine,0)//获取指定行的字符数量
#include <windows.h>
#define ID_EDIT 1
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);
TCHAR szAppName[] = TEXT ("PopPad1") ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;
if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, szAppName,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ;
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static HWND hwndEdit ;
switch (message)
{
case WM_CREATE :
hwndEdit = CreateWindow (TEXT ("edit"), NULL,
WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL |
WS_BORDER | ES_LEFT | ES_MULTILINE |
ES_AUTOHSCROLL | ES_AUTOVSCROLL,
0, 0, 0, 0, hwnd, (HMENU) ID_EDIT,
((LPCREATESTRUCT) lParam) -> hInstance, NULL) ;
return 0 ;
case WM_SETFOCUS :
SetFocus (hwndEdit) ;
return 0 ;
case WM_SIZE :
MoveWindow (hwndEdit, 0, 0, LOWORD (lParam), HIWORD (lParam), TRUE) ;
return 0 ;
case WM_COMMAND :
if (LOWORD (wParam) == ID_EDIT)
if (HIWORD (wParam) == EN_ERRSPACE ||
HIWORD (wParam) == EN_MAXTEXT)
MessageBox (hwnd, TEXT ("Edit control out of space."),
szAppName, MB_OK | MB_ICONSTOP) ;
return 0 ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
效果图如下：
列边框通知码
| 通知码 | 值 |
| LBN_ERRSPACE | -2 |
| LBN_SELCHANGE | 1 |
| LBN_DBLCLK | 2 |
| LBN_SELCANCEL | 3 |
| LBN_SETFOCUS | 4 |
| LBN_KILLFOCUS | 5 |
常用方法：
iCount=SendMessage(hwndList,LB_GETCOUNT,0,0);//获取总的项目数 iIndex=SendMessage(hwndList,LB_GETCURSEL,0,0);//获取第几行 iLength=SendMessage(hwndList,LB_GETTEXTLEN,iIndex,0);//获取指定行有多少个字符
下面看一段完整的代码，虽然有点恶心；
#include<windows.h>
#include<windowsx.h>
LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);
HINSTANCE hInst;
int WINAPI WinMain(
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow // show state
)
{
static TCHAR szAppName[]=TEXT("leidemingzi");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
hInst=hInstance;
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndclass.hIcon=LoadIcon(NULL,IDI_ERROR);
wndclass.hInstance=hInstance;
wndclass.lpfnWndProc=WindowProc;
wndclass.lpszClassName=szAppName;
wndclass.lpszMenuName=NULL;
wndclass.style=CS_HREDRAW|CS_VREDRAW;
if(!RegisterClass(&wndclass))
{
MessageBox(NULL,TEXT("the program require the windows nt"),TEXT("tips"),MB_ICONERROR);
return 0;
}
hwnd=CreateWindow(
szAppName, // registered class name
TEXT("this is title"), // window name
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // horizontal position of window
CW_USEDEFAULT, // vertical position of window
CW_USEDEFAULT, // window width
CW_USEDEFAULT, // window height
NULL, // handle to parent or owner window
NULL, // menu handle or child identifier
hInstance, // handle to application instance
NULL // window-creation data
);
ShowWindow(hwnd,nCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)
{
HDC hdc;
PAINTSTRUCT ps;
static HWND hwndButton;
static int i,ii;
static int cxClient,cyClient;
static int cxChar,cyChar;
static HWND hwndList;
static int count;
static int iIndex,iLength;
TCHAR szBuffer[20];
static TCHAR szBuffer1[]=TEXT("hello");
static TCHAR szBuffer2[]=TEXT("I love cplusplus");
static TCHAR szBuffer3[]=TEXT("welcome to my blog");
static TCHAR szBuffer4[]=TEXT("Let's begin to learn windows programing");
static TCHAR szBuffer5[]=TEXT("After learning win32,we learn MFC");
switch(uMsg)
{
case WM_CREATE:
cxChar=LOWORD(GetDialogBaseUnits());
cyChar=HIWORD(GetDialogBaseUnits());
hwndButton=CreateWindow( TEXT("BUTTON"),TEXT("按钮"),WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
0,0,0,0,hwnd,(HMENU)i,hInst,NULL);
hwndList=CreateWindow(TEXT("listbox"),TEXT("please select"),WS_CHILD|WS_VISIBLE|LBS_STANDARD,
cxChar,cyChar*3,cxChar*26+GetSystemMetrics(SM_CXVSCROLL),
cyChar*5,hwnd,(HMENU)ii,hInst,NULL);
SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer1);
SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer2);
SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer5);
SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer4);
SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)szBuffer3);
return 0;
case WM_SIZE:
cxClient=LOWORD(lParam);
cyClient=GET_Y_LPARAM(lParam);
MoveWindow(hwndButton,cxClient/2-cxChar*5,cyClient/2-cyChar*5,cxChar*10,cyChar*4,TRUE);
return 0;
case WM_COMMAND:
if(wParam==i)
{
MessageBox(NULL,TEXT("你点击了按钮"),TEXT("tips"),MB_OK);
}
if(LOWORD(wParam)==ii&&HIWORD(wParam)==LBN_SELCHANGE)
{
iIndex=SendMessage(hwndList,LB_GETCURSEL,0,0);
iLength=SendMessage(hwndList,LB_GETTEXTLEN,iIndex,0)+1;
wsprintf(szBuffer,TEXT("你选择第%d 条,长度为 %d "),iIndex+1,iLength);
MessageBox(NULL,szBuffer,TEXT("tips"),MB_ICONERROR);
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
顶住，再来一个：
#include <windows.h>
#define ID_LIST 1
#define ID_TEXT 2
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("Environ") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;
if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, TEXT ("Environment List Box"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ;
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}
void FillListBox (HWND hwndList)
{
int iLength ;
TCHAR * pVarBlock, * pVarBeg, * pVarEnd, * pVarName ;
pVarBlock = GetEnvironmentStrings () ; // Get pointer to environment block
while (*pVarBlock)
{
if (*pVarBlock != '=') // Skip variable names beginning with '='
{
pVarBeg = pVarBlock ; // Beginning of variable name
while (*pVarBlock++ != '=') ; // Scan until '='
pVarEnd = pVarBlock - 1 ; // Points to '=' sign
iLength = pVarEnd - pVarBeg ; // Length of variable name
// Allocate memory for the variable name and terminating
// zero. Copy the variable name and append a zero.
pVarName = calloc (iLength + 1, sizeof (TCHAR)) ;
CopyMemory (pVarName, pVarBeg, iLength * sizeof (TCHAR)) ;
pVarName[iLength] = '\0' ;
// Put the variable name in the list box and free memory.
SendMessage (hwndList, LB_ADDSTRING, 0, (LPARAM) pVarName) ;
free (pVarName) ;
}
while (*pVarBlock++ != '\0') ; // Scan until terminating zero
}
FreeEnvironmentStrings (pVarBlock) ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static HWND hwndList, hwndText ;
int iIndex, iLength, cxChar, cyChar ;
TCHAR * pVarName, * pVarValue ;
switch (message)
{
case WM_CREATE :
cxChar = LOWORD (GetDialogBaseUnits ()) ;
cyChar = HIWORD (GetDialogBaseUnits ()) ;
// Create listbox and static text windows.
hwndList = CreateWindow (TEXT ("listbox"), NULL,
WS_CHILD | WS_VISIBLE | LBS_STANDARD,
cxChar, cyChar * 3,
cxChar * 16 + GetSystemMetrics (SM_CXVSCROLL),
cyChar * 5,
hwnd, (HMENU) ID_LIST,
(HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE),
NULL) ;
hwndText = CreateWindow (TEXT ("static"), NULL,
WS_CHILD | WS_VISIBLE | SS_LEFT,
cxChar, cyChar,
GetSystemMetrics (SM_CXSCREEN), cyChar,
hwnd, (HMENU) ID_TEXT,
(HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE),
NULL) ;
FillListBox (hwndList) ;
return 0 ;
case WM_SETFOCUS :
SetFocus (hwndList) ;
return 0 ;
case WM_COMMAND :
if (LOWORD (wParam) == ID_LIST && HIWORD (wParam) == LBN_SELCHANGE)
{
// Get current selection.
iIndex = SendMessage (hwndList, LB_GETCURSEL, 0, 0) ;
iLength = SendMessage (hwndList, LB_GETTEXTLEN, iIndex, 0) + 1 ;
pVarName = calloc (iLength, sizeof (TCHAR)) ;
SendMessage (hwndList, LB_GETTEXT, iIndex, (LPARAM) pVarName) ;
// Get environment string.
iLength = GetEnvironmentVariable (pVarName, NULL, 0) ;
pVarValue = calloc (iLength, sizeof (TCHAR)) ;
GetEnvironmentVariable (pVarName, pVarValue, iLength) ;
// Show it in window.
SetWindowText (hwndText, pVarValue) ;
free (pVarName) ;
free (pVarValue) ;
}
return 0 ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}