// 重绘.cpp : Defines the entry point for the application. // #include "stdafx.h" #include "resource.h" #define MAX_LOADSTRING 100 // Global Variables: HINSTANCE hInst; // current instance TCHAR szTitle[MAX_LOADSTRING]; // The title bar text TCHAR szWindowClass[MAX_LOADSTRING]; // The title bar text // Foward declarations of functions included in this code module: ATOM MyRegisterClass(HINSTANCE hInstance); BOOL InitInstance(HINSTANCE, int); LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { // TODO: Place code here. MSG msg; HACCEL hAccelTable; // Initialize global strings LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING); LoadString(hInstance, IDC_MY, szWindowClass, MAX_LOADSTRING); MyRegisterClass(hInstance); // Perform application initialization: if (!InitInstance (hInstance, nCmdShow)) { return FALSE; } hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_MY); // Main message loop: while (GetMessage(&msg, NULL, 0, 0)) { if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) { TranslateMessage(&msg); DispatchMessage(&msg); } } return msg.wParam; } // // FUNCTION: MyRegisterClass() // // PURPOSE: Registers the window class. // // COMMENTS: // // This function and its usage is only necessary if you want this code // to be compatible with Win32 systems prior to the 'RegisterClassEx' // function that was added to Windows 95. It is important to call this function // so that the application will get 'well formed' small icons associated // with it. // ATOM MyRegisterClass(HINSTANCE hInstance) { WNDCLASSEX wcex; wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW; wcex.lpfnWndProc = (WNDPROC)WndProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = hInstance; wcex.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_MY); wcex.hCursor = LoadCursor(NULL, IDC_ARROW); wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wcex.lpszMenuName = (LPCSTR)IDC_MY; wcex.lpszClassName = szWindowClass; wcex.hIconSm = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL); return RegisterClassEx(&wcex); } // // FUNCTION: InitInstance(HANDLE, int) // // PURPOSE: Saves instance handle and creates main window // // COMMENTS: // // In this function, we save the instance handle in a global variable and // create and display the main program window. // BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) { HWND hWnd; hInst = hInstance; // Store instance handle in our global variable hWnd = CreateWindowEx(NULL, szWindowClass, szTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); if (!hWnd) { return FALSE; } ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); return TRUE; } void _cdecl Trace(LPCSTR lpszFormat, ...) { va_list args; va_start(args, lpszFormat); char szBuffer[1024*20]; int nBuf = _vsnprintf(szBuffer, sizeof(szBuffer), lpszFormat, args); OutputDebugStringA(szBuffer); va_end(args); } #define TRACE Trace BOOL ModifyStyle(HWND hWnd, DWORD dwRemove, DWORD dwAdd, UINT nFlags = 0) { DWORD dwStyle = ::GetWindowLong(hWnd, GWL_STYLE); DWORD dwNewStyle = (dwStyle & ~dwRemove) | dwAdd; if(dwStyle == dwNewStyle) return FALSE; ::SetWindowLong(hWnd, GWL_STYLE, dwNewStyle); if(nFlags != 0) { ::SetWindowPos(hWnd, NULL, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | nFlags); } return TRUE; } BOOL ModifyStyleEx(HWND hWnd, DWORD dwRemove, DWORD dwAdd, UINT nFlags = 0) { DWORD dwStyle = ::GetWindowLong(hWnd, GWL_EXSTYLE); DWORD dwNewStyle = (dwStyle & ~dwRemove) | dwAdd; if(dwStyle == dwNewStyle) return FALSE; ::SetWindowLong(hWnd, GWL_EXSTYLE, dwNewStyle); if(nFlags != 0) { ::SetWindowPos(hWnd, NULL, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | nFlags); } return TRUE; } void DrawGradientV(HDC hDC, COLORREF colorStart, COLORREF colorEnd, RECT& DrawRect ) { //如果开始结束色相同,则使用绘制色块命令绘制 if (colorStart==colorEnd) { HBRUSH h_Brush=CreateSolidBrush(colorStart); FillRect(hDC,&DrawRect,h_Brush); DeleteObject(h_Brush); return ; } //找到其实颜色和结束颜色之间的最大颜色值,决定渐变步长等 int r, g, b; float rStep, gStep, bStep; r = (GetRValue(colorEnd) - GetRValue(colorStart)); g = (GetGValue(colorEnd) - GetGValue(colorStart)); b = (GetBValue(colorEnd) - GetBValue(colorStart)); int nSteps = max(abs(r), max(abs(g), abs(b))); nSteps=DrawRect.bottom-DrawRect.top; //计算每个颜色的步长 rStep = abs(r/(float)nSteps); gStep = abs(g/(float)nSteps); bStep = abs(b/(float)nSteps); int r1,g1,b1; r1 = GetRValue(colorStart); g1 = GetGValue(colorStart); b1 = GetBValue(colorStart); //准备GDI HDC hMemDC=CreateCompatibleDC(hDC); //创建内存DC HBITMAP hBitmap=::CreateCompatibleBitmap(hDC,1,nSteps);//创建位图 ::SelectObject(hMemDC,hBitmap); //把位图选进内存DC for(int i = 0; i<nSteps ; i ++ ) { SetPixel(hMemDC,0,i,RGB( r1+r*i/nSteps, g1+g*i/nSteps, b1+b*i/nSteps)); } //内存DC映射到屏幕DC StretchBlt(hDC, DrawRect.left,DrawRect.top,DrawRect.right-DrawRect.left,DrawRect.bottom-DrawRect.top,hMemDC,0,0,1,nSteps,SRCCOPY); //删除 ::DeleteDC(hMemDC); ::DeleteObject(hBitmap); } HWND hwListbox=NULL; WNDPROC old_ListBox_WndProc=NULL; LRESULT CALLBACK ListBox_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { //TRACE("message:%08X", message); if (message == WM_ERASEBKGND) { return TRUE; } return CallWindowProc(old_ListBox_WndProc,hWnd,message,wParam,lParam); } HWND CreateListBox(HWND hParent) { HWND hList=::CreateWindowEx( NULL, "ListBox", NULL, WS_CHILD|WS_VSCROLL|WS_VISIBLE|LBS_NOTIFY|LBS_HASSTRINGS|LBS_DISABLENOSCROLL|LBS_NOINTEGRALHEIGHT|LBS_OWNERDRAWVARIABLE, 10,10,300,300, hParent, (HMENU)0x1000, hInst, NULL); old_ListBox_WndProc=(WNDPROC)::SetWindowLong(hList,GWL_WNDPROC,(LONG)ListBox_WndProc); int i; char text[256]; for (i=0;i<1000;i++) { sprintf(text,"list item %d", i); ListBox_AddString(hList, text); } for (i=0;i<1000;i++) { ListBox_SetItemHeight(hList,i,30); } return hList; } BOOL OnDrawListBox(LPDRAWITEMSTRUCT lpdis) { if (lpdis->itemState & ODS_SELECTED) { DrawGradientV(lpdis->hDC,0xffcccc,0xcc9999,lpdis->rcItem); }else{ HBRUSH hBrush=::CreateSolidBrush(0xFEF5EA); FillRect(lpdis->hDC,&lpdis->rcItem,hBrush); DeleteObject(hBrush); } char buff[256]; ListBox_GetText(lpdis->hwndItem,lpdis->itemID,buff); SIZE s; GetTextExtentPoint32(lpdis->hDC," ", 1, &s); RECT drc=lpdis->rcItem; drc.top=drc.top+(drc.bottom-drc.top-s.cy)/2; drc.bottom=drc.top+s.cy; drc.left+=s.cy/2; SetBkMode(lpdis->hDC, TRANSPARENT); DrawText(lpdis->hDC,buff,strlen(buff),&drc,DT_LEFT|DT_VCENTER); return TRUE; } HWND hwComboBox=NULL; WNDPROC old_ComboBox_WndProc=NULL; WNDPROC old_ComboBox_ListBox_WndProc=NULL; LRESULT CALLBACK ComboBox_ListBox_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { if (message == WM_ERASEBKGND) return TRUE; return CallWindowProc(old_ComboBox_ListBox_WndProc,hWnd,message,wParam,lParam); } LRESULT CALLBACK ComboBox_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { PAINTSTRUCT ps; HDC hdc; if (message == WM_ERASEBKGND) return TRUE; if (message == WM_PAINT) { hdc = BeginPaint(hWnd, &ps); DRAWITEMSTRUCT drawItem; memset(&drawItem,0,sizeof(drawItem)); drawItem.hDC=hdc; drawItem.hwndItem=hWnd; GetClientRect(hWnd,&drawItem.rcItem); drawItem.CtlID=GetWindowLong(hWnd,GWL_ID); if (::GetKeyState(VK_LBUTTON) & 0x80) { drawItem.itemState=1; } drawItem.itemID=-1; SendMessage(GetParent(hWnd),WM_DRAWITEM,0,(LPARAM)&drawItem); EndPaint(hWnd, &ps); return TRUE; } return CallWindowProc(old_ComboBox_WndProc,hWnd,message,wParam,lParam); } HWND CreateComboBox(HWND hParent) { HWND hComboBox=::CreateWindowEx( NULL, "ComboBox", NULL, WS_CHILD|WS_VSCROLL|WS_VISIBLE|CBS_DROPDOWNLIST|CBS_HASSTRINGS|CBS_DISABLENOSCROLL|CBS_NOINTEGRALHEIGHT|CBS_OWNERDRAWVARIABLE, 320,10,300,320, hParent, (HMENU)0x1001, hInst, NULL); old_ComboBox_WndProc=(WNDPROC)SetWindowLong(hComboBox,GWL_WNDPROC,(LONG)ComboBox_WndProc); COMBOBOXINFO cbi= { sizeof(COMBOBOXINFO) }; if (GetComboBoxInfo(hComboBox,&cbi)) { //TRACE("hComboBox:%08X cbi.hwndCombo:%08X cbi.hwndItem:%08X cbi.hwndList:%08X", hComboBox, cbi.hwndCombo, cbi.hwndItem, cbi.hwndList); ModifyStyle(cbi.hwndList,WS_BORDER,0,0); ModifyStyleEx(cbi.hwndList,WS_EX_CLIENTEDGE,0,0); old_ComboBox_ListBox_WndProc=(WNDPROC)SetWindowLong(cbi.hwndList,GWL_WNDPROC,(LONG)ComboBox_ListBox_WndProc); } int i; char text[256]; for (i=0;i<1000;i++) { sprintf(text,"list item %d", i); ComboBox_AddString(hComboBox, text); } ComboBox_SetItemHeight(hComboBox,-1,20); for (i=0;i<1000;i++) { ComboBox_SetItemHeight(hComboBox,i,30); } return hComboBox; } BOOL OnDrawComboBox(LPDRAWITEMSTRUCT lpdis) { char buff[256]={0}; //绘制ComboBox控件 if (lpdis->itemID==-1) { //读取但前选择的文字 int icur=ComboBox_GetCurSel(lpdis->hwndItem); if (icur!=-1) { ComboBox_GetLBText(lpdis->hwndItem,icur,buff); } //绘制ComboBox背景 HBRUSH hBrush; if (lpdis->itemState==2) { hBrush=::CreateSolidBrush(0xFBEDDF); }else{ hBrush=::CreateSolidBrush(0xFEF5EA); } FillRect(lpdis->hDC,&lpdis->rcItem,hBrush); DeleteObject(hBrush); //绘制文字 SIZE s; GetTextExtentPoint32(lpdis->hDC," ", 1, &s); RECT drc=lpdis->rcItem; drc.top=drc.top+(drc.bottom-drc.top-s.cy)/2; drc.bottom=drc.top+s.cy; drc.left+=s.cy/2; int slen=strlen(buff); if (slen) { SetBkMode(lpdis->hDC, TRANSPARENT); DrawText(lpdis->hDC,buff,slen,&drc,DT_LEFT|DT_VCENTER); } //绘制ListBox背景 }else{ if (lpdis->itemState & ODS_SELECTED) { DrawGradientV(lpdis->hDC,0xffcccc,0xcc9999,lpdis->rcItem); }else{ HBRUSH hBrush=::CreateSolidBrush(0xFEF5EA); //0xFBEDDF FillRect(lpdis->hDC,&lpdis->rcItem,hBrush); DeleteObject(hBrush); } ComboBox_GetLBText(lpdis->hwndItem,lpdis->itemID,buff); //绘制文字 SIZE s; GetTextExtentPoint32(lpdis->hDC," ", 1, &s); RECT drc=lpdis->rcItem; drc.top=drc.top+(drc.bottom-drc.top-s.cy)/2; drc.bottom=drc.top+s.cy; drc.left+=s.cy/2; int slen=strlen(buff); if (slen) { SetBkMode(lpdis->hDC, TRANSPARENT); DrawText(lpdis->hDC,buff,slen,&drc,DT_LEFT|DT_VCENTER); } } return TRUE; } // // FUNCTION: WndProc(HWND, unsigned, WORD, LONG) // // PURPOSE: Processes messages for the main window. // // WM_COMMAND - process the application menu // WM_PAINT - Paint the main window // WM_DESTROY - post a quit message and return // // LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { int wmId, wmEvent; PAINTSTRUCT ps; HDC hdc; TCHAR szHello[MAX_LOADSTRING]; LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING); switch (message) { case WM_CREATE: { hwListbox = CreateListBox(hWnd); hwComboBox = CreateComboBox(hWnd); return TRUE; } break; case WM_CTLCOLORLISTBOX: { //TRACE("WM_CTLCOLORLISTBOX"); } break; case WM_DRAWITEM: { LPDRAWITEMSTRUCT lpdis=(LPDRAWITEMSTRUCT)lParam; if (lpdis->CtlID==0x1000) { if (OnDrawListBox(lpdis)) return TRUE; }else if (lpdis->CtlID==0x1001){ if (OnDrawComboBox(lpdis)) return TRUE; } return DefWindowProc(hWnd, message, wParam, lParam); } break; case WM_COMMAND: wmId = LOWORD(wParam); wmEvent = HIWORD(wParam); // Parse the menu selections: switch (wmId) { case IDM_EXIT: DestroyWindow(hWnd); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } break; case WM_PAINT: hdc = BeginPaint(hWnd, &ps); EndPaint(hWnd, &ps); break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } return 0; }