diff options
Diffstat (limited to 'vcl/README.lifecycle')
| -rw-r--r-- | vcl/README.lifecycle | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/vcl/README.lifecycle b/vcl/README.lifecycle index 6ef91ccfce51..732b1908d077 100644 --- a/vcl/README.lifecycle +++ b/vcl/README.lifecycle @@ -296,12 +296,12 @@ ways and often both. the inheritance chain from children to parent, during dispose. The easiest way to fix these is to just ensure that these - cleanup methods, especially LoseFocus continue to work even + cleanup methods, especially LoseFocus, continue to work even on disposed Window sub-class instances. -** It crashes with some invalid memory ... +** It crashes with some invalid memory... - Assuming that the invalid memory is a Window sub-class itself, + Assuming that the invalid memory is a Window sub-class itself, then almost certainly there is some cockup in the reference-counting; eg. if you hit an OutputDevice::release assert on mnRefCount - then almost certainly you have a @@ -309,13 +309,12 @@ ways and often both. happen via this sort of pattern: ModelessDialog *pDlg = VclPtr<ModelessDialog>(nullptr /* parent */); - // by here the pDlg quite probably points to free'd memory - ... + // by here the pDlg quite probably points to free'd memory... It is necessary in these cases to ensure that the *pDlg is a VclPtr<ModelessDialog> instead. -** It crashes with some invalid memory #2 ... +** It crashes with some invalid memory #2... Often a ::dispose method will free some pImpl member, but not NULL it; and (cf. above) we can now get various virtual |