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Fix remote desktop cursor cross-contamination across dialogs

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The view-mode "forbidden" cursor was applied with SetClassLongPtr(GCLP_HCURSOR),
which mutates the cursor for the whole window class instead of the single dialog
instance. Opening a second remote-desktop dialog without remote control overwrote
that shared class cursor with IDC_NO, so the already-controlled dialog also began
showing the forbidden icon even though it remained operable.

Move the view-mode cursor decision into OnSetCursor, which Windows routes per
window, and remove the now-unused class-cursor assignments. Remote-control mode
and the remote cursor-shape path are left unchanged.

Also drop the dead m_hRemoteCursor member and the leftover GetIconInfo block
(which leaked hbmMask/hbmColor in ScreenSpyDlg), plus the now-unreferenced
m_bMouseTracking flag.

Co-Authored-By: deepseek-v4-pro
This commit is contained in:
yuanyuanxiang
2026-08-20 16:23:39 +02:00
parent 5611ba621c
commit c08315cd79
4 changed files with 40 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
server/2015Remote/HideScreenSpyDlg.cpp
View File

@@ -90,11 +90,33 @@ BEGIN_MESSAGE_MAP(CHideScreenSpyDlg, CDialog)
ON_WM_PAINT()
ON_WM_TIMER()
ON_WM_CLOSE()
ON_WM_SETCURSOR()
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CHideScreenSpyDlg message handlers
BOOL CHideScreenSpyDlg::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
// 查看模式(未开启远程控制)：客户区显示禁止图标；标题栏及系统按钮保持正常箭头，
// 便于拖动窗口或通过标题栏右键菜单开启远程控制。
// 这里按窗口自身状态判断，避免用窗口类光标(GCLP_HCURSOR)时被同类的其他对话框实例
// 共享串扰——第二个对话框切到查看模式后，第一个控制中的对话框也被误显示成禁止图标。
if (!m_bIsCtrl && nHitTest == HTCLIENT) {
::SetCursor(LoadCursor(NULL, IDC_NO));
return TRUE;
}
if (!m_bIsCtrl &&
(nHitTest == HTCAPTION || nHitTest == HTSYSMENU || nHitTest == HTMENU ||
nHitTest == HTCLOSE || nHitTest == HTMINBUTTON || nHitTest == HTMAXBUTTON ||
nHitTest == HTHELP)) {
::SetCursor(LoadCursor(NULL, IDC_ARROW));
return TRUE;
}
// 控制模式：交父类处理，显示窗口类光标（远程光标形状）
return __super::OnSetCursor(pWnd, nHitTest, message);
}
void CHideScreenSpyDlg::OnClose()
{
if (!m_aviFile.IsEmpty()) {
@@ -165,7 +187,6 @@ BOOL CHideScreenSpyDlg::OnInitDialog()
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
SetClassLongPtr(m_hWnd, GCLP_HCURSOR, (LONG_PTR)LoadCursor(NULL, IDC_NO));
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL) {
pSysMenu->AppendMenuSeparator(MF_SEPARATOR);
@@ -214,15 +235,7 @@ BOOL CHideScreenSpyDlg::OnInitDialog()
}
// TODO: Add extra initialization here
m_hRemoteCursor = LoadCursor(NULL, IDC_ARROW);
ICONINFO CursorInfo;
::GetIconInfo(m_hRemoteCursor, &CursorInfo);
pSysMenu->CheckMenuItem(IDM_CONTROL, m_bIsCtrl ? MF_CHECKED : MF_UNCHECKED);
SetClassLongPtr(m_hWnd, GCLP_HCURSOR, (LONG_PTR)m_hRemoteCursor);
if (CursorInfo.hbmMask != NULL)
::DeleteObject(CursorInfo.hbmMask);
if (CursorInfo.hbmColor != NULL)
::DeleteObject(CursorInfo.hbmColor);
// 初始化窗口大小结构
m_hFullDC = ::GetDC(m_hWnd);
m_hFullMemDC = CreateCompatibleDC(m_hFullDC);
@@ -440,11 +453,6 @@ void CHideScreenSpyDlg::OnSysCommand(UINT nID, LPARAM lParam)
case IDM_CONTROL: {
m_bIsCtrl = !m_bIsCtrl;
pSysMenu->CheckMenuItem(IDM_CONTROL, m_bIsCtrl ? MF_CHECKED : MF_UNCHECKED);
if (m_bIsCtrl) {
SetClassLongPtr(m_hWnd, GCLP_HCURSOR, (LONG_PTR)m_hRemoteCursor);
} else
SetClassLongPtr(m_hWnd, GCLP_HCURSOR, (LONG_PTR)LoadCursor(NULL, IDC_NO));
}
break;