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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-05-17 22:16:02 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-05-17 22:16:02 +0000 |
commit | d53035bc78b3fbbd640a6a7535b9cdf7ca0d9667 (patch) | |
tree | 166f99f4788c23b3649826405468b34f475d4726 /NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx | |
parent | b1bbea743d6eef38eebf9975a3b19bbfb7e71233 (diff) | |
download | nuttx-d53035bc78b3fbbd640a6a7535b9cdf7ca0d9667.tar.gz nuttx-d53035bc78b3fbbd640a6a7535b9cdf7ca0d9667.tar.bz2 nuttx-d53035bc78b3fbbd640a6a7535b9cdf7ca0d9667.zip |
Implement an NX interface to block flush message queues in multi-user mode. This is necessary to prevent stale window handles when a window is closed
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4745 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx')
-rw-r--r-- | NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx b/NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx index 757dc1c5b..453cc1115 100644 --- a/NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx +++ b/NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx @@ -597,6 +597,31 @@ namespace NXWidgets #endif /** + * This event is the response from nx_block (or nxtk_block). Those + * blocking interfaces are used to assure that no further messages are + * directed to the window. Receipt of the blocked callback signifies + * that (1) there are no further pending events and (2) that the + * window is now 'defunct' and will receive no further events. + * + * This event supports coordinated destruction of a window in multi- + * user mode. In multi-use mode, the client window logic must stay + * intact until all of the queued callbacks are processed. Then the + * window may be safely closed. Closing the window prior with pending + * callbacks can lead to bad behavior when the callback is executed. + * + * @param hwnd. Window handle of the blocked window + * @param arg. User provided argument (see nx_openwindow, nx_requestbkgd, + * nxtk_openwindow, or nxtk_opentoolbar) + */ + +#ifdef CONFIG_NX_MULTIUSER + inline void windowBlocked(void) + { + m_eventHandlers.raiseBlockedEvent(); + } +#endif + + /** * This event means that cursor control data is available for the window. * * @param cursorControl The cursor control code received. |