VC++绘制窗口(WinAPI/WinMain)2015-02-01 19:34:34
( 1人已投票,[高质量] )
VC++通过调用WinAPI来绘制基础窗口的的代码，见如下：
#include <windows.h>
struct
{
int iStyle ;
TCHAR *szText ;
}
button[] =
{
BS_PUSHBUTTON, TEXT ("PUSHBUTTON"),
BS_DEFPUSHBUTTON, TEXT ("DEFPUSHBUTTON"),
BS_CHECKBOX, TEXT ("CHECKBOX"),
BS_AUTOCHECKBOX, TEXT ("AUTOCHECKBOX"),
BS_RADIOBUTTON, TEXT ("RADIOBUTTON"),
BS_3STATE, TEXT ("3STATE"),
BS_AUTO3STATE, TEXT ("AUTO3STATE"),
BS_GROUPBOX, TEXT ("GROUPBOX"),
BS_AUTORADIOBUTTON, TEXT ("AUTORADIO"),
BS_OWNERDRAW, TEXT ("OWNERDRAW")
} ;
#define NUM (sizeof button / sizeof button[0])
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("BtnLook") ;
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,
TEXT ("Button Look"),
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 hwndButton[NUM] ;
static RECT rect ;
static TCHAR szTop[] = TEXT ("message wParam lParam"),
szUnd[] = TEXT ("_______ ______ ______"),
szFormat[] = TEXT ("%-16s%04X-%04X %04X-%04X"),
szBuffer[50] ;
static int cxChar, cyChar ;
HDC hdc ;
PAINTSTRUCT ps ;
// HFONT hF;
//hF=GetStockObject(ANSI_VAR);
int i ;
switch (message)
{
case WM_CREATE :
cxChar = LOWORD (GetDialogBaseUnits ()) ;
cyChar = HIWORD (GetDialogBaseUnits ()) ;
for (i = 0 ; i < NUM ; i++)
hwndButton[i] =CreateWindow (
TEXT("button"), //类别名称
button[i].szText, //窗口文字
WS_CHILD | WS_VISIBLE | button[i].iStyle,//窗口样式
cxChar, //x位置
cyChar * (1 + 2 * i), //y位置
20 * cxChar, //宽度
7 * cyChar / 4,//高度
hwnd, //父窗口
(HMENU) i,//子窗口ID
((LPCREATESTRUCT)lParam)->hInstance, //执行实体句柄
NULL //附加参数
) ;
return 0 ;
case WM_SIZE :
rect.left = 24 * cxChar ;
rect.top = 2 * cyChar ;
rect.right = LOWORD (lParam) ;
rect.bottom = HIWORD (lParam) ;
return 0 ;
case WM_PAINT :
InvalidateRect (hwnd, &rect, TRUE) ;
hdc = BeginPaint (hwnd, &ps) ;
//SelectObject(hdc,hF) ;
SetBkMode (hdc, TRANSPARENT) ;
TextOut (hdc, 24 * cxChar, cyChar, szTop, lstrlen (szTop)) ;
TextOut (hdc, 24 * cxChar, cyChar, szUnd, lstrlen (szUnd)) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DRAWITEM :
case WM_COMMAND :
ScrollWindow (hwnd, 0, -cyChar, &rect, &rect) ;
hdc = GetDC (hwnd) ;
//SelectObject(hdc, hF) ;
TextOut( hdc, 24 * cxChar, cyChar * (rect.bottom / cyChar - 1),
szBuffer,
wsprintf (szBuffer, szFormat,
message == WM_DRAWITEM ? TEXT ("WM_DRAWITEM") :
TEXT ("WM_COMMAND"),
HIWORD (wParam), LOWORD (wParam),
HIWORD (lParam), LOWORD (lParam))) ;
ReleaseDC (hwnd, hdc) ;
ValidateRect (hwnd, &rect) ;
break ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
