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* added NOTE on why having mouse coords in screen space until the very last 

moment is so nice


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22228 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus 2007-09-13 15:02:29 +00:00
parent cdb69c4a02
commit 259233e466
1 changed files with 5 additions and 0 deletions
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5
src/kits/interface/View.cpp
View File

@ -1470,6 +1470,11 @@ BView::GetMouse(BPoint *location, uint32 *buttons, bool checkMessageQueue)
ConvertFromScreen(location);
// TODO: in beos R5, location is already converted to the view local coordinate system,
// so if an app checks the window message queue by itself, it might not find what it expects.
// NOTE: the fact that we have mouse coords in screen space in our queue avoids the problem
// that messages already in the queue will be outdated as soon as a window or even the
// view moves. The second situation being quite common actually, also with regards to
// scrolling. An app reading these messages would have to know the locations of the window
// and view for each message... otherwise it is potentially broken anyways.
} else
*buttons = 0;
}