VC实现窗口自动隐藏

#include <windows.h> int alignType; //全局变量，用于记录窗体停靠状态 enum { ALIGN_NONE, //不停靠 ALIGN_TOP, //停靠上边 ALIGN_LEFT, //停靠左边 ALIGN_RIGHT //停靠右边 }; #define NEAR_SIZE 20 //定义自动停靠有效距离 #define NEAR_SIDE 5 //窗体隐藏后在屏幕上保留的像素，以使鼠标可以触及 int ScreenX=GetSystemMetrics(SM_CXSCREEN); void HideSide(HWND hWnd, BOOL hide) ; void OnMoving(HWND hWnd, LPRECT pRect) ; LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; void NearSide(HWND hWnd) ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { static TCHAR szAppName[] = TEXT ("HelloWin") ; 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, // window class name TEXT ("窗口自动隐藏"), // window caption WS_OVERLAPPEDWINDOW, // window style ScreenX-300, // initial x position 100, // initial y position 200, // initial x size 500, // initial y size NULL, // parent window handle NULL, // window menu handle hInstance, // program instance handle NULL) ; // creation parameters 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) { switch(message) { case WM_TIMER: //定时器消息 { POINT pt; RECT rc; GetCursorPos(&pt); GetWindowRect(hWnd, &rc); if (!PtInRect(&rc, pt)) //若鼠标不在窗体内,隐藏窗体. { KillTimer(hWnd, WM_TIMER); HideSide(hWnd, TRUE); } break; } case WM_CREATE: case WM_INITDIALOG: //初始化消息 { //SetWindowPos(hWnd,NULL,rc.left,rc.top, 0, 0, SWP_NOSIZE | SWP_NOSENDCHANGING); //程序保存窗体上次靠位置,在这里恢复. NearSide(hWnd); break; } //这两个消息是在窗体移动开始时和结束时产生的,我们在窗体开始移动时关闭定时器,移动结束后再打开,这样避免窗体移动时隐藏,金山快译的浮动条就有这种情况出现. case WM_ENTERSIZEMOVE: { KillTimer(hWnd, WM_TIMER); break; } case WM_EXITSIZEMOVE: { SetTimer(hWnd, WM_TIMER, 500, NULL); break; } case WM_MOUSEMOVE: //受到窗体移动消息时,判断窗体是否显示, { RECT rc; GetWindowRect(hWnd, &rc); if (rc.left< 0 || rc.top < 0 || rc.right > ScreenX) //未显示 HideSide(hWnd, FALSE); break; } case WM_MOVING: //处理窗体移动时消息,实现自动停靠 { OnMoving(hWnd, (LPRECT) lParam); break; } case WM_MOVE: { //NearSide(hWnd); //reak; //保存窗体位置 } } return DefWindowProc(hWnd,message,wParam,lParam); } void OnMoving(HWND hWnd, LPRECT pRect) { //未靠边界由pRect测试 if (alignType == ALIGN_NONE) { if (pRect->top < NEAR_SIZE) //在上边有效距离内，自动靠拢。 { alignType = ALIGN_TOP; pRect->bottom -= pRect->top; pRect->top = 0; } if (pRect->left < NEAR_SIZE) //在左边有效距离内 { alignType = ALIGN_LEFT; pRect->right -= pRect->left; pRect->left = 0; } else if (pRect->right + NEAR_SIZE > ScreenX) //在右边有效距离内，ScreenX为屏幕宽度，可由GetSystemMetrics(SM_CYSCREEN)得到。 { alignType = ALIGN_RIGHT; pRect->left += (ScreenX - pRect->right); pRect->right = ScreenX; } } else { //靠边界由鼠标测试 POINT pt; GetCursorPos(&pt); if (alignType == ALIGN_TOP) { if (pt.y > NEAR_SIZE) //由于我们移动窗体时，鼠标在标题栏内，当鼠标位置超过有效距离后，我们可以考虑用户要向下拖动鼠标。我们便解除上部停靠。 { alignType = ALIGN_NONE; pRect->bottom += NEAR_SIZE; pRect->top = NEAR_SIZE; } else { pRect->bottom -= pRect->top; pRect->top = 0; if (pRect->left < NEAR_SIZE) //在上部停靠时，我们也考虑左右边角。 { pRect->right -= pRect->left; pRect->left = 0; } else if (pRect->right + NEAR_SIZE > ScreenX) { pRect->left += (ScreenX - pRect->right); pRect->right = ScreenX; } } } if (alignType == ALIGN_LEFT) { if (pt.x - pRect->right > 0) //鼠标可以在整个标题条来回移动，所以我们不能简单用左边界和鼠标的距离来解除停靠，这里我们在鼠标离开右边界时解除停靠。 { alignType = ALIGN_NONE; pRect->right += NEAR_SIZE; pRect->left = NEAR_SIZE; } else { pRect->right -= pRect->left; pRect->left = 0; if (pRect->top < NEAR_SIZE) //考虑左上角。 { pRect->bottom -= pRect->top; pRect->top = 0; } } } else if (alignType == ALIGN_RIGHT) { if (pt.x < pRect->left) //当鼠标离开左边界时，解除停靠。 { alignType = ALIGN_NONE; pRect->left -= NEAR_SIZE; pRect->right -= NEAR_SIZE; } else { pRect->left += (ScreenX - pRect->right); pRect->right = ScreenX; if (pRect->top < NEAR_SIZE) //考虑右上角。 { pRect->bottom -= pRect->top; pRect->top = 0; } } } } } void NearSide(HWND hWnd) { int change = 0; RECT rect; GetWindowRect(hWnd, &rect); alignType=ALIGN_NONE; if (rect.left < NEAR_SIZE) { alignType = ALIGN_LEFT; if((rect.left != 0) && rect.right!=NEAR_SIDE) { rect.right -= rect.left; rect.left = 0; change = 1; } } else if(rect.right > ScreenX - NEAR_SIZE) { alignType = ALIGN_RIGHT; if (rect.right != ScreenX && rect.left != ScreenX - NEAR_SIDE) { rect.left += (ScreenX - rect.right); rect.right = ScreenX; change = 1; } } //调整上 else if (rect.top < NEAR_SIZE) { alignType = ALIGN_TOP; if (rect.top != 0 && rect.bottom != NEAR_SIDE) { rect.bottom -= rect.top; rect.top = 0; change = 1; } } if (change) { MoveWindow(hWnd, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, TRUE); } } void HideSide(HWND hWnd, BOOL hide) { RECT rc; int