OWNDRAW文档格式.docx

OWNDRAW文档格式.docx

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OwnDraw"

）;

MSGmsg;

HWNDhwnd;

WNDCLASSwndclass;

hInst=hInstance;

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=szAppName;

wndclass.lpszClassName=szAppName;

if（!

RegisterClass（&

wndclass））

{

MessageBox（NULL,TEXT（"

ThisprogramrequiresWindowsNT!

"

）,

szAppName,MB_ICONERROR）;

return0;

}

hwnd=CreateWindow（szAppName,TEXT（"

Owner-DrawButtonDemo"

WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT,CW_USEDEFAULT,

NULL,NULL,hInstance,NULL）;

ShowWindow（hwnd,iCmdShow）;

UpdateWindow（hwnd）;

while（GetMessage（&

msg,NULL,0,0））

TranslateMessage（&

msg）;

DispatchMessage（&

returnmsg.wParam;

}

voidTriangle（HDChdc,POINTpt[]）

SelectObject（hdc,GetStockObject（BLACK_BRUSH））;

Polygon（hdc,pt,3）;

SelectObject（hdc,GetStockObject（WHITE_BRUSH））;

LRESULTCALLBACKWndProc（HWNDhwnd,UINTmessage,WPARAMwParam,LPARAMlParam）

staticHWNDhwndSmaller,hwndLarger;

staticintcxClient,cyClient,cxChar,cyChar;

intcx,cy;

LPDRAWITEMSTRUCTpdis;

POINTpt[3];

RECTrc;

switch（message）

caseWM_CREATE:

cxChar=LOWORD（GetDialogBaseUnits（））;

cyChar=HIWORD（GetDialogBaseUnits（））;

//Createtheowner-drawpushbuttons

hwndSmaller=CreateWindow（TEXT（"

button"

）,TEXT（"

WS_CHILD|WS_VISIBLE|BS_OWNERDRAW,

0,0,BTN_WIDTH,BTN_HEIGHT,

hwnd,（HMENU）ID_SMALLER,hInst,NULL）;

hwndLarger=CreateWindow（TEXT（"

hwnd,（HMENU）ID_LARGER,hInst,NULL）;

caseWM_SIZE:

cxClient=LOWORD（lParam）;

cyClient=HIWORD（lParam）;

//Movethebuttonstothenewcenter

MoveWindow（hwndSmaller,cxClient/2-3*BTN_WIDTH/2,

cyClient/2-BTN_HEIGHT/2,

BTN_WIDTH,BTN_HEIGHT,TRUE）;

MoveWindow（hwndLarger,cxClient/2+BTN_WIDTH/2,

caseWM_COMMAND:

GetWindowRect（hwnd,&

rc）;

//Makethewindow10%smallerorlarger

switch（wParam）

caseID_SMALLER:

rc.left+=cxClient/20;

rc.right-=cxClient/20;

rc.top+=cyClient/20;

rc.bottom-=cyClient/20;

break;

caseID_LARGER:

rc.left-=cxClient/20;

rc.right+=cxClient/20;

rc.top-=cyClient/20;

rc.bottom+=cyClient/20;

MoveWindow（hwnd,rc.left,rc.top,rc.right-rc.left,

rc.bottom-rc.top,TRUE）;

caseWM_DRAWITEM:

pdis=（LPDRAWITEMSTRUCT）lParam;

//Fillareawithwhiteandframeitblack

FillRect（pdis->

hDC,&

pdis->

rcItem,

（HBRUSH）GetStockObject（WHITE_BRUSH））;

FrameRect（pdis->

（HBRUSH）GetStockObject（BLACK_BRUSH））;

//Drawinwardandoutwardblacktriangles

cx=pdis->

rcItem.right-pdis->

rcItem.left;

cy=pdis->

rcItem.bottom-pdis->

rcItem.top;

switch（pdis->

CtlID）

pt[0].x=3*cx/8;

pt[0].y=1*cy/8;

pt[1].x=5*cx/8;

pt[1].y=1*cy/8;

pt[2].x=4*cx/8;

pt[2].y=3*cy/8;

Triangle（pdis->

hDC,pt）;

pt[0].x=7*cx/8;

pt[0].y=3*cy/8;

pt[1].x=7*cx/8;

pt[1].y=5*cy/8;

pt[2].x=5*cx/8;

pt[2].y=4*cy/8;

pt[0].x=5*cx/8;

pt[0].y=7*cy/8;

pt[1].x=3*cx/8;

pt[1].y=7*cy/8;

pt[2].y=5*cy/8;

pt[0].x=1*cx/8;

pt[0].y=5*cy/8;

pt[1].x=1*cx/8;

pt[1].y=3*cy/8;

pt[2].x=3*cx/8;

pt[2].y=1*cy/8;

pt[2].x=7*cx/8;

pt[2].y=7*cy/8;

pt[2].x=1*cx/8;

//Inverttherectangleifthebuttonisselected

if（pdis->

itemState&

ODS_SELECTED）

InvertRect（pdis->

rcItem）;

//Drawafocusrectangleifthebuttonhasthefocus

ODS_FOCUS）

pdis->

rcItem.left+=cx/16;

rcItem.top+=cy/16;

rcItem.right-=cx/16;

rcItem.bottom-=cy/16;

DrawFocusRect（pdis->

caseWM_DESTROY:

PostQuitMessage（0）;

returnDefWindowProc（hwnd,message,wParam,lParam）;