b7e7bb763a
Pressing Esc while double clicking on the column separator in the native header in wxGrid could result in a crash due to using invalid index when calling GetColLeft(m_dragRowOrCol) in GetPositionForResizeEvent() called from DoHeaderEndDragResizeCol() because m_dragRowOrCol had been already reset to -1. Guard against the crash with a check in GetPositionForResizeEvent() itself and also add a check to DoHeaderDragResizeCol() to avoid calling the former function in this case. Reproducing the original problem is relatively simple as it's enough to just keep double clicking a column separator while also pressing Esc, but catching it under debugger is much more complicated and so it's not really clear how exactly does this happen, but tracing shows that the native control just decides to generate two HDN_ENDTRACK messages without any intervening HDN_BEGINTRACK, so it doesn't seem like we can do anything else than just silently ignore the unwanted HDN_ENDTRACK, as it's done in this commit.
About
wxWidgets is a free and open source cross-platform C++ framework for writing advanced GUI applications using native controls.
wxWidgets allows you to write native-looking GUI applications for all the major desktop platforms and also helps with abstracting the differences in the non-GUI aspects between them. It is free for the use in both open source and commercial applications, comes with the full, easy to read and modify, source and extensive documentation and a collection of more than a hundred examples. You can learn more about wxWidgets at https://www.wxwidgets.org/ and read its documentation online at https://docs.wxwidgets.org/
Platforms
This version of wxWidgets supports the following primary platforms:
- Windows XP, Vista, 7, 8 and 10 (32/64 bits).
- Most Unix variants using the GTK+ toolkit (version 2.6 or newer or 3.x).
- OS X (10.7 or newer) using Cocoa (32/64 bits).
Most popular C++ compilers are supported including but not limited to:
- Microsoft Visual C++ 2003 or later (up to 2019).
- g++ 3.4 or later, including MinGW/MinGW-64/TDM under Windows.
- Clang under OS X and Linux.
- Intel icc compiler.
- Oracle (ex-Sun) CC.
Licence
wxWidgets licence is a modified version of LGPL explicitly allowing not distributing the sources of an application using the library even in the case of static linking.
Building
For building the library, please see platform-specific documentation under
docs/<port> directory, e.g. here are the instructions for
wxGTK, wxMSW and
wxOSX.
If you're building the sources checked out from Git, and not from a released version, please see these additional Git-specific notes.
Further information
If you are looking for community support, you can get it from
- Mailing Lists
- Discussion Forums
- #wxwidgets IRC channel
- Stack Overflow
(tag your questions with
wxwidgets) - And you can report bugs at https://trac.wxwidgets.org/newticket
Commercial support is also available.
Finally, keep in mind that wxWidgets is an open source project collaboratively developed by its users and your contributions to it are always welcome. Please check our guidelines if you'd like to do it.
Have fun!
The wxWidgets Team.