|
马上注册,结交更多好友,享用更多功能^_^
您需要 登录 才可以下载或查看,没有账号?立即注册
x
第34讲示例程序
- /* -------------------------------------------------------------------
- MyWindows.c -- 基本窗口模型
- 《Windows 程序设计(SDK)》视频教程
- --------------------------------------------------------------------*/
- #include <windows.h>
- #include <strsafe.h>
- LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
- int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
- {
- static TCHAR szAppName[] = TEXT("MyWindows");
- 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("这个程序需要在 Windows NT 才能执行!"), szAppName, MB_ICONERROR);
- return 0;
- }
- hwnd = CreateWindow(szAppName,
- TEXT("鱼C工作室"),
- 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 int cxClientMax, cyClientMax, cxClient, cyClient, cxChar, cyChar;
- static int cLinesMax, cLines;
- static PMSG pmsg;
- static RECT rectScroll;
- static TCHAR szTop[] = TEXT("Message Key Char Repeat Scan Ext ALT Prev Tran");
- static TCHAR szUnd[] = TEXT("_______ ___ ____ ______ ____ ___ ___ ____ ____");
- static TCHAR *szFormat[2] = {
- TEXT("%-13s %3d %-15s%c%6u %4d %3s %3s %4s %4s"),
- TEXT("%-13s 0x%04X%1s%c %6u %4d %3s %3s %4s %4s")
- };
- static TCHAR *szYes = TEXT("Yes");
- static TCHAR *szNo = TEXT("No");
- static TCHAR *szDown = TEXT("Down");
- static TCHAR *szUp = TEXT("Up");
- static TCHAR *szMessage[] = {
- TEXT("WM_KEYDOWN"), TEXT("WM_KEYUP"), TEXT("WM_CHAR"), TEXT("WM_DEADCHAR"),
- TEXT("WM_SYSKEYDOWN"), TEXT("WM_SYSKEYUP"), TEXT("WM_SYSCHAR"), TEXT("WM_SYSDEADCHAR")
- };
- HDC hdc;
- int i, iType;
- PAINTSTRUCT ps;
- TCHAR szBuffer[128], szKeyName[32];
- TEXTMETRIC tm;
- switch (message)
- {
- case WM_CREATE:
- case WM_DISPLAYCHANGE:
- // 获取客户区的最大尺寸
- cxClientMax = GetSystemMetrics(SM_CXMAXIMIZED);
- cyClientMax = GetSystemMetrics(SM_CYMAXIMIZED);
- hdc = GetDC(hwnd);
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT)); // 设置等宽字体
- GetTextMetrics(hdc, &tm);
- cxChar = tm.tmAveCharWidth;
- cyChar = tm.tmHeight;
- ReleaseDC(hwnd, hdc);
- if (pmsg)
- {
- free(pmsg);
- }
- cLinesMax = cyClientMax / cyChar; // 计算客户区一屏最多可以容纳多少行
- pmsg = malloc(cLinesMax * sizeof(MSG)); // 申请足够容纳 cLinesMax 行消息的内存
- cLines = 0;
- // 这里没有 break,没有 return。
- case WM_SIZE:
- if (message == WM_SIZE)
- {
- cxClient = LOWORD(lParam);
- cyClient = HIWORD(lParam);
- }
- // 计算滚动的矩形
- rectScroll.left = 0;
- rectScroll.right = cxClient;
- rectScroll.top = cyChar;
- rectScroll.bottom = cyChar * (cyClient / cyChar);
- InvalidateRect(hwnd, NULL, TRUE);
- return 0;
- case WM_KEYDOWN:
- case WM_KEYUP:
- case WM_CHAR:
- case WM_DEADCHAR:
- case WM_SYSKEYDOWN:
- case WM_SYSKEYUP:
- case WM_SYSCHAR:
- case WM_SYSDEADCHAR:
- // 但凡接收到上述消息,页面向上滚动一行
- for (i = cLinesMax - 1; i > 0; i--)
- {
- pmsg[i] = pmsg[i - 1];
- }
- pmsg[0].hwnd = hwnd;
- pmsg[0].message = message;
- pmsg[0].wParam = wParam;
- pmsg[0].lParam = lParam;
- cLines = min(cLines + 1, cLinesMax);
- ScrollWindow(hwnd, 0, -cyChar, &rectScroll, &rectScroll);
- break;
- case WM_PAINT:
- hdc = BeginPaint(hwnd, &ps);
-
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
- SetBkMode(hdc, TRANSPARENT);
- TextOut(hdc, 0, 0, szTop, lstrlen(szTop));
- TextOut(hdc, 0, 0, szUnd, lstrlen(szUnd));
- for (i = 0; i < min(cLines, cyClient / cyChar - 1); i++)
- {
- iType = pmsg[i].message == WM_CHAR ||
- pmsg[i].message == WM_SYSCHAR ||
- pmsg[i].message == WM_DEADCHAR ||
- pmsg[i].message == WM_SYSDEADCHAR;
- GetKeyNameText(pmsg[i].lParam, szKeyName, sizeof(szKeyName) / sizeof(TCHAR));
- TextOut(hdc, 0, (cyClient / cyChar - 1 - i) * cyChar, szBuffer,
- wsprintf(szBuffer, szFormat[iType],
- szMessage[pmsg[i].message - WM_KEYFIRST], pmsg[i].wParam,
- (PTSTR)(iType ? TEXT(" ") : szKeyName),
- (TCHAR)(iType ? pmsg[i].wParam : ' '),
- LOWORD(pmsg[i].lParam), HIWORD(pmsg[i].lParam) & 0xFF,
- 0x01000000 & pmsg[i].lParam ? szYes : szNo,
- 0x20000000 & pmsg[i].lParam ? szYes : szNo,
- 0x40000000 & pmsg[i].lParam ? szDown : szUp,
- 0x80000000 & pmsg[i].lParam ? szUp : szDown));
- }
- EndPaint(hwnd, &ps);
- return 0;
- case WM_DESTROY:
- PostQuitMessage(0);
- return 0;
- }
- return DefWindowProc(hwnd, message, wParam, lParam);
- }
复制代码
=======================================================================================
第35讲示例程序
- /* -------------------------------------------------------------------
- MyWindows.c -- 基本窗口模型
- 《Windows 程序设计(SDK)》视频教程
- --------------------------------------------------------------------*/
- #include <windows.h>
- #define BUFFER(x, y) *(pBuffer + y * cxBuffer + x)
- LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
- int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
- {
- static TCHAR szAppName[] = TEXT("MyWindows");
- 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("这个程序需要在 Windows NT 才能执行!"), szAppName, MB_ICONERROR);
- return 0;
- }
- hwnd = CreateWindow(szAppName,
- TEXT("鱼C工作室"),
- 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 DWORD dwCharSet = DEFAULT_CHARSET;
- static int cxChar, cyChar, cxClient, cyClient, cxBuffer, cyBuffer, xCaret, yCaret;
- static TCHAR *pBuffer = NULL;
- HDC hdc;
- int x, y, i;
- PAINTSTRUCT ps;
- TEXTMETRIC tm;
- switch (message)
- {
- case WM_CREATE:
- hdc = GetDC(hwnd);
-
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
- GetTextMetrics(hdc, &tm);
- cxChar = tm.tmAveCharWidth;
- cyChar = tm.tmHeight;
-
- ReleaseDC(hwnd, hdc);
- // 此处木有返回,木有break
- case WM_SIZE:
- if (message == WM_SIZE)
- {
- cxClient = LOWORD(lParam);
- cyClient = HIWORD(lParam);
- }
- cxBuffer = max(1, cxClient / cxChar);
- cyBuffer = max(1, cyClient / cyChar);
- if (pBuffer != NULL)
- {
- free(pBuffer);
- }
- pBuffer = (TCHAR *)malloc(cxBuffer * cyBuffer * sizeof(TCHAR));
- for (y = 0; y < cyBuffer; y++)
- {
- for (x = 0; x < cxBuffer; x++)
- {
- BUFFER(x, y) = ' ';
- }
- }
- // 将插入符号指向左上角
- xCaret = 0;
- yCaret = 0;
- if (hwnd == GetFocus())
- {
- SetCaretPos(xCaret * cxChar, yCaret * cyChar);
- }
- InvalidateRect(hwnd, NULL, TRUE);
- return 0;
- case WM_SETFOCUS:
- CreateCaret(hwnd, NULL, cxChar, cyChar);
- SetCaretPos(xCaret * cxChar, yCaret * cyChar);
- ShowCaret(hwnd);
- return 0;
- case WM_KILLFOCUS:
- HideCaret(hwnd);
- DestroyCaret();
- return 0;
- case WM_KEYDOWN:
- switch (wParam)
- {
- case VK_HOME:
- xCaret = 0;
- break;
- case VK_END:
- xCaret = cxBuffer - 1;
- break;
- case VK_PRIOR:
- yCaret = 0;
- break;
- case VK_NEXT:
- yCaret = cyBuffer - 1;
- break;
- case VK_LEFT:
- xCaret = max(xCaret - 1, 0);
- break;
- case VK_RIGHT:
- xCaret = min(xCaret + 1, cxBuffer - 1);
- break;
- case VK_UP:
- yCaret = max(yCaret - 1, 0);
- break;
- case VK_DOWN:
- yCaret = min(yCaret + 1, cyBuffer - 1);
- break;
- case VK_DELETE:
- for (x = xCaret; x < cxBuffer - 1; x++)
- {
- BUFFER(x, yCaret) = BUFFER(x + 1, yCaret);
- }
- BUFFER(cxBuffer - 1, yCaret) = ' ';
- HideCaret(hwnd);
- hdc = GetDC(hwnd);
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
- TextOut(hdc, xCaret * cxChar, yCaret * cyChar, &BUFFER(xCaret, yCaret), cxBuffer - xCaret);
- ReleaseDC(hwnd, hdc);
- ShowCaret(hwnd);
- break;
- }
- SetCaretPos(xCaret * cxChar, yCaret * cyChar);
- return 0;
-
- case WM_CHAR:
- for (i = 0; i < (int)LOWORD(lParam); i++)
- {
- switch (wParam)
- {
- case '\b':
- if (xCaret > 0)
- {
- xCaret--;
- SendMessage(hwnd, WM_KEYDOWN, VK_DELETE, 1);
- }
- break;
- case '\t':
- do
- {
- SendMessage(hwnd, WM_CHAR, ' ', 1);
- } while (xCaret % 8 != 0);
- break;
- case '\n':
- if (++yCaret == cyBuffer)
- {
- yCaret = 0;
- }
- break;
- case '\r':
- xCaret = 0;
- if (++yCaret == cyBuffer)
- {
- yCaret = 0;
- }
- break;
- case '\x1B': // 十六进制的1B,对应的ASCII字符是ESC
- for (y = 0; y < cyBuffer; y++)
- {
- for (x = 0; x < cxBuffer; x++)
- {
- BUFFER(x, y) = ' ';
- }
- }
- xCaret = 0;
- yCaret = 0;
- InvalidateRect(hwnd, NULL, FALSE);
- break;
- default:
- BUFFER(xCaret, yCaret) = (TCHAR)wParam;
- HideCaret(hwnd);
- hdc = GetDC(hwnd);
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
- TextOut(hdc, xCaret * cxChar, yCaret * cyChar, &BUFFER(xCaret, yCaret), 1);
- ReleaseDC(hwnd, hdc);
- ShowCaret(hwnd);
- if (++xCaret == cxBuffer)
- {
- xCaret = 0;
- if (++yCaret == cyBuffer)
- {
- yCaret = 0;
- }
- }
- break;
- }
- }
- SetCaretPos(xCaret * cxChar, yCaret * cyChar);
- return 0;
- case WM_PAINT:
- hdc = BeginPaint(hwnd, &ps);
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
- for (y = 0; y < cyBuffer; y++)
- {
- TextOut(hdc, 0, y * cyChar, &BUFFER(0, y), cxBuffer);
- }
- EndPaint(hwnd, &ps);
- return 0;
- case WM_DESTROY:
- PostQuitMessage(0);
- return 0;
- }
- return DefWindowProc(hwnd, message, wParam, lParam);
- }
复制代码
加不加都行 不过为了逻辑清楚和减少判断 还是加上比较好 不加程序也不会错 只是会继续往下走 再走几个判断而已,最终也是返回,进行消息队列下一个消息判断
|
|