博客-Windows窗体原理及控件WM_DRAWITEM和子类化重绘演示文件

#include <windows.h> #include "resource.h" LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam); BOOL CALLBACK TemplateProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam); BOOL CALLBACK CreateProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam); BOOL CALLBACK SelfDrawProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam); BOOL CALLBACK SubclassProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam); LRESULT CALLBACK BtnProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam); HWND hDlgModeless=NULL;//保存全局非模态对话框 int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { static TCHAR szAppName[] = TEXT ("SDKButton"); HWND hwnd; MSG msg; WNDCLASSEX wndclassex = {0}; wndclassex.cbSize = sizeof(WNDCLASSEX); wndclassex.style = CS_HREDRAW | CS_VREDRAW; wndclassex.lpfnWndProc = WndProc; wndclassex.cbClsExtra = 0; wndclassex.cbWndExtra = 0; wndclassex.hInstance = hInstance; wndclassex.hIcon = LoadIcon (NULL, IDI_APPLICATION); wndclassex.hCursor = LoadCursor (NULL, IDC_ARROW); wndclassex.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH); wndclassex.lpszMenuName = MAKEINTRESOURCE(IDR_MAINMENU); wndclassex.lpszClassName = szAppName; wndclassex.hIconSm = wndclassex.hIcon; if (!RegisterClassEx (&wndclassex)) { MessageBox (NULL, TEXT ("RegisterClassEx failed!"), szAppName, MB_ICONERROR); return 0; } hwnd = CreateWindowEx (WS_EX_OVERLAPPEDWINDOW, szAppName, TEXT ("SDK Button测试"), 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)) { //注意非模态对话框消息由主窗口分发 if (hDlgModeless == NULL || !IsDialogMessage(hDlgModeless, &msg)) { TranslateMessage (&msg); DispatchMessage (&msg); } } return msg.wParam; } LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { HDC hdc; PAINTSTRUCT ps; static RECT rect; TCHAR szDrawText[] = TEXT("欢迎访问我的博客http://blog.csdn.net/wenzhou1219"); switch (message) { case WM_SIZE: GetClientRect(hwnd, &rect); return (0); case WM_PAINT: hdc = BeginPaint (hwnd, &ps); DrawText(hdc, szDrawText, -1, &rect, DT_CENTER | DT_SINGLELINE | DT_VCENTER); EndPaint (hwnd, &ps); return (0); case WM_COMMAND: //分发菜单 switch (LOWORD(wParam)) { case IDM_TEMPLATE: DialogBox(GetWindowLong(hwnd, GWL_HINSTANCE), IDD_TEMPLATE, hwnd, TemplateProc); break; case IDM_CREATE: hDlgModeless = CreateDialog(GetWindowLong(hwnd, GWL_HINSTANCE), MAKEINTRESOURCE(IDD_CREATE), hwnd, CreateProc); ShowWindow(hDlgModeless, SW_NORMAL);//注意非模态对话框不指明WS_VISIBLE属性必须显示调用ShowWindow来显示 break; case IDM_SELFDRAW: DialogBox(GetWindowLong(hwnd, GWL_HINSTANCE), IDD_SELFDRAW, hwnd, SelfDrawProc); break; case IDM_SUBCLASS: DialogBox(GetWindowLong(hwnd, GWL_HINSTANCE), IDD_SUBCLASS, hwnd, SubclassProc); break; } return (0); case WM_DESTROY: PostQuitMessage (0); return (0); } return DefWindowProc (hwnd, message, wParam, lParam); } BOOL CALLBACK TemplateProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) { switch(message) { case WM_CLOSE: { EndDialog(hDlg,0); } return (TRUE); case WM_COMMAND: switch (LOWORD(wParam)) { case IDCANCEL: { SendMessage(hDlg, WM_CLOSE, 0, 0); } return (TRUE); case IDOK: { } return (TRUE); } return (FALSE); } return (FALSE); } BOOL CALLBACK CreateProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) { switch(message) { case WM_INITDIALOG: { //动态创建控件子窗口 CreateWindow(TEXT("button"), TEXT("确定"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 10, 10, 100, 50, hDlg, (HMENU)IDOK, GetWindowLong(hDlg, GWL_HINSTANCE), NULL); CreateWindow(TEXT("button"), TEXT("取消"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 10, 100, 100, 50, hDlg, (HMENU)IDCANCEL, GetWindowLong(hDlg, GWL_HINSTANCE), NULL); } return (TRUE); case WM_CLOSE: DestroyWindow(hDlg); hDlgModeless = NULL;//注意及时将指针置0防止窗口销毁后消窗口分发消息 return (TRUE); case WM_COMMAND: switch (LOWORD(wParam)) { case IDCANCEL: { SendMessage(hDlg, WM_CLOSE, 0, 0); } return (TRUE); case IDOK: { } return (TRUE); } return (FALSE); } return (FALSE); } BOOL CALLBACK SelfDrawProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) { LPDRAWITEMSTRUCT pdis; HDC hdc; HDC hMemDc; static HINSTANCE hInstance; static HBITMAP hBitmapOK_D; static HBITMAP hBitmapOK_U; static HBITMAP hBitmapOK_F; static HBITMAP hBitmapCANCEL_D; static HBITMAP hBitmapCANCEL_U; static HBITMAP hBitmapCANCEL_F; static HWND hwndOk; static HWND hwndCanel; static BITMAP bm; switch(message) { case WM_INITDIALOG: { hInstance = GetWindowLong(hDlg, GWL_HINSTANCE); hwndOk = GetDlgItem(hDlg, IDOK); hwndCanel = GetDlgItem(hDlg, IDCANCEL); hBitmapOK_D = LoadBitmap(hInstance, TEXT("image1d")); hBitmapOK_U = LoadBitmap(hInstance, TEXT("image1u")); hBitmapOK_F = LoadBitmap(hInstance, TEXT("image1f")); hBitmapCANCEL_D = LoadBitmap(hInstance, TEXT("image2d")); hBitmapCANCEL_U = LoadBitmap(hInstance, TEXT("image2u")); hBitmapCANCEL_F = LoadBitmap(hInstance, TEXT("image2f")); GetObject(hBitmapCANCEL_D, sizeof(BITMAP), (PTSTR)&bm); //调整按钮大小和最大图片一样大 SetWindowPos(hwndOk, HWND_TOPMOST, 0, 0, bm.bmWidth, bm.bmHeight, SWP_NOZORDER | SWP_NOMOVE); SetWindowPos(hwndCanel, HWND_TOPMOST, 0, 0, bm.bmWidth, bm.bmHeight, SWP_NOZORDER | SWP_NOMOVE); } return (TRUE); case WM_CLOSE: { EndDialog(hDlg,0); } return (TRUE); case WM_COMMAND: switch (LOWORD(wParam)) { case IDCANCEL: { SendMessage(hDlg, WM_CLOSE, 0, 0); } return (TRUE); case IDOK: { } return (TRUE); } return (FALSE); //自绘制按钮 case WM_DRAWITEM: //获得绘制结构体，包含绘制的按钮DC和当前按钮状态等 pdis = (LPDRAWITEMSTRUCT)lParam; if (pdis->CtlType == ODT_BUTTON)//只绘制button类型 { hdc = pdis->hDC; SaveDC(hdc);//保存DC,绘制完必须恢复默认 //绘制默认状态 hMemDc = CreateCompatibleDC(hdc); SelectObject(hMemDc, pdis->CtlID == IDOK ? hBitmapOK_U : hBitmapCANCEL_U); BitBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight, hMemDc, 0, 0, SRCCOPY); DeleteDC(hMemDc); //绘制获取焦点时状态 if (pdis->itemState & ODS_FOCUS) { hMemDc = CreateCompatibleDC(hdc); SelectObject(hMemDc, pdis->CtlID == IDOK ? hBitmapOK_F : hBitmapCANCEL_F); BitBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight, hMemDc, 0, 0, SRCCOPY); DeleteDC(hMemDc); } //绘制下压状态 if (pdis->itemState & ODS_SELECTED) { hMemDc = CreateCompatibleDC(hdc); SelectObject(hMemDc, pdis->CtlID == ID