27f705686d
There is an impedance mismatch between wxDataViewCtrl API, which allows deleting all items of the model at once, and GtkTreeView, which only allows deleting them one by one, so bad things happen when we start deleting the items from the GTK+ model after already having deleted them from the wxDataViewModel, due to dereferencing the already freed pointers. Work around this by explicitly marking the model as being "temporarily unsafe to use" by setting the stamp, uniquely identifying it, to 0 (and ensuring that it's never 0 during the normal operation), and checking for it in all functions that are called by GTK+ from inside gtk_tree_model_row_deleted() that we call from Cleared(). The fix is not ideal, as the list of these functions was determined empirically and could change in the future GTK+ versions, and also ugly, but there doesn't seem to be any other way around this and at least now Valgrind doesn't report invalid memory reads after calling wxTreeListCtrl::DeleteAllItems() as it did before.
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 http://docs.wxwidgets.org/
Platforms
wxWidgets currently 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 2017).
- g++ 3.4 or later, including MinGW/MinGW-64/TDM under Windows.
- Clang under OS X and Linux.
- Intel icc compiler.
- Oracle (ex-Sun) aCC.
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.
If you're building the sources checked out from Git, and not from a released versions, please see these additional Git-specific notes.
Further information
If you are looking for support, you can get it from
- Mailing Lists
- Discussion Forums
- #wxwidgets IRC channel
- Stack Overflow
(tag your questions with
wxwidgets) - Please report bugs at https://trac.wxwidgets.org/newticket
We would also gladly welcome your contributions.
Have fun!
The wxWidgets Team.