拖动无边框对话框改变大小

最新推荐文章于 2024-06-21 00:15:57 发布

转载最新推荐文章于 2024-06-21 00:15:57 发布 · 522 阅读

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WM_NCHITTEST  WM_SETCURSOR  WM_NCLBUTTONDOWN  
  
 消息处理函数: 
  
 UINT CXXXDlg::OnNcHitTest(UINT nHitTest, CPoint point) 
 { 
  CRect rect; 
  GetWindowRect(&rect); 
  if(point.x  <= rect.left+3) 
     return HTLEFT; 
  else if(point.x >= rect.right-3) 
     return HTRIGHT; 
  else if(point.y  <= rect.top+3) 
     return HTTOP; 
  else if(point.y >= rect.bottom-3) 
     return HTBOTTOM; 
  else if(point.x  <= rect.left+10 && point.y  <= rect.top+10) 
     return HTTOPLEFT; 
  else if(point.x >= rect.right-10 && point.y  <= rect.top+10) 
     return HTTOPRIGHT; 
  else if(point.x  <= rect.left+10 && point.y >= rect.bottom-10) 
     return HTBOTTOMLEFT; 
  else if(point.x >= rect.right-10 && point.y >= rect.bottom-10) 
     return HTBOTTOMRIGHT; 
   
     return 0; 
 } 
  
  
 BOOL CXXXDlg::OnSetCursor(HWND hWnd, UINT nHitTest, UINT message) 
 { 
     if(nHitTest == HTCAPTION || nHitTest == HTSYSMENU || 
        nHitTest == HTMENU || nHitTest == HTCLIENT) 
    { 
        SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW))); 
    } 
    else if(nHitTest == HTTOP || nHitTest == HTBOTTOM) 
    { 
        SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENS))); 
    } 
    else if(nHitTest == HTLEFT || nHitTest == HTRIGHT) 
    { 
        SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZEWE))); 
    } 
    else if(nHitTest == HTTOPLEFT || nHitTest == HTBOTTOMRIGHT) 
    { 
        SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENWSE))); 
    } 
    else if(nHitTest == HTTOPRIGHT || nHitTest == HTBOTTOMLEFT) 
    { 
        SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENESW))); 
    } 
    else 
    { 
        SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW))); 
     } 
 } 
  
  
 void CXXXDlg::OnNcLButtonDown(UINT nHitTest, CPoint point) 
 { 
    if(nHitTest == HTTOP) 
        SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOP, MAKELPARAM(point.x, point.y)); 
    else if(nHitTest == HTBOTTOM) 
        SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOM, MAKELPARAM(point.x, point.y)); 
    else if(nHitTest == HTLEFT) 
        SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_LEFT, MAKELPARAM(point.x, point.y)); 
    else if(nHitTest == HTRIGHT) 
        SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_RIGHT, MAKELPARAM(point.x, point.y)); 
    else if(nHitTest == HTTOPLEFT) 
        SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOPLEFT, MAKELPARAM(point.x, point.y)); 
    else if(nHitTest == HTTOPRIGHT) 
        SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOPRIGHT, MAKELPARAM(point.x, point.y)); 
    else if(nHitTest == HTBOTTOMLEFT) 
        SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOMLEFT, MAKELPARAM(point.x, point.y)); 
    else if(nHitTest == HTBOTTOMRIGHT) 
        SendMessage(WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOMRIGHT, MAKELPARAM(point.x, point.y)); 
 }