The previous commit was not sufficient as getIconsSet() returns a
reference to the SearchSet and it could then be used after the
mutex had been unlocked and while it was being modified in
initIconsSet() called in another thread.
The icons download dialog was triggering the grid launcher update after
icons had been downloaded. But that means no update was done if the
dialog had been closed during the download.
Now the GUIManager triggers the update. This fixes the missing update
when hiding the download dialog while downloading an icon set.
GuiManager::initIconsSet is called from a callback of the iconset
download dialog, which runs in a separate thread. That means the
iconset can be accessed from two separate thread (the GUI thread,
and the download thread).
This was not an issue until the previous commit as closing the
download dialog while a download was ongoing would crash ScummVM.
But now that the crash is fixed, a race condition was possible.
When using the mouse wheel (scroll up/down) in the Grid view, item tray for a selected game, ScummVM would exit
I didn't notice any side-effects from the fix, but someone more familiar with the code should confirm.
The crash was not systematic but occured in the case where adding
the game did not change the indexes for the first and last visible
items. The issue was that in setEntryList() was called it did not
cleat the _visibleEntryList array that still contained dangling
pointers to the old items in the _dataEntryList. In most cases
the _visibleEntryList would be updated with pointers to the new
items when calcVisibleEntries() was called from reflowLayout(),
before being used in assignEntriesToItems() (also called from
reflowLayout()). But if the indexes of the first and last visible
items did not change, _visibleEntryList was not updated and we
got a crash in assignEntriesToItems() when trying to access freed
memory.
Also prevent segmentation fault cases related to low-res or switching from low-res to hi-res
And fix memory leak related to loading and scaling of the thumbnail image
A lot of the updated logic is borrowed from the saveload-dialog.cpp for the simple list view (with the thumbnail to the right of the list).
Strip formatting from the list widget string before taking the length of
it to calculate the caret position. This can be seen e.g. in the save
dialog when not using the icon view.
The detection was done on the dropped path, so it worked when
dropping a directory, but not a file. Now we can drop a file
and it will run the detection on the parent directory.
The tray position was not correctly computed and it was most of the
time trying to display it way outside the window (it was using X
instead of Y in one place for the vertical position).
This was a recent regression from a6bc1d587 (GUI: Fixed grid view
for long games list).
We used Common::Rect which uses in16 for its members. Lomger lists
exceeded 32,768 in heights, thus, leading to negative numbers. As a result,
scrollbar was not showing up.
