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Make sure we unregister for clipboard notifications on exit

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on Windows. This is necessary because Windows doesn't implicitly
clean up when a process dies, and we cannot trust applications to
always explicitly unregister.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10367 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Pierre Ossman 2014-10-09 12:52:05 +00:00
parent 933840f353
commit 3e4af3cd8c
1 changed files with 29 additions and 1 deletions
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30
src/Fl_win32.cxx
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@ -472,6 +472,11 @@ public:
OleUninitialize();
fl_brush_action(1);
fl_cleanup_dc_list();
// This is actually too late in the cleanup process to remove the
// clipboard notifications, but we have no earlier hook so we try
// to work around it anyway.
if (clipboard_wnd != NULL)
fl_clipboard_notify_untarget(clipboard_wnd);
}
};
static Fl_Win32_At_Exit win32_at_exit;
@ -812,7 +817,30 @@ static void fl_clipboard_notify_untarget(HWND wnd) {
if (wnd != clipboard_wnd)
return;
ChangeClipboardChain(wnd, next_clipboard_wnd);
// We might be called late in the cleanup where Windows has already
// implicitly destroyed our clipboard window. At that point we need
// to do some extra work to manually repair the clipboard chain.
if (IsWindow(wnd))
ChangeClipboardChain(wnd, next_clipboard_wnd);
else {
HWND tmp, head;
tmp = CreateWindow("STATIC", "Temporary FLTK Clipboard Window", 0,
0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
if (tmp == NULL)
return;
head = SetClipboardViewer(tmp);
if (head == NULL)
ChangeClipboardChain(tmp, next_clipboard_wnd);
else {
SendMessage(head, WM_CHANGECBCHAIN, (WPARAM)wnd, (LPARAM)next_clipboard_wnd);
ChangeClipboardChain(tmp, head);
}
DestroyWindow(tmp);
}
clipboard_wnd = next_clipboard_wnd = 0;
}