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Clarify that QExposeEvent/exposeEvent handles any invalidation of the window

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Change-Id: Ib6f649213e3268c6946c7fa973ce970e896a46a0
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
This commit is contained in:
Tor Arne Vestbø 2018-03-20 13:53:02 +01:00
parent 941aea658f
commit ea60b4eb9a
2 changed files with 9 additions and 7 deletions
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4
src/gui/kernel/qevent.cpp
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@ -1533,8 +1533,8 @@ QMoveEvent::~QMoveEvent()
\ingroup events
Expose events are sent to windows when an area of the window is invalidated
or window exposure in the windowing system changes.
Expose events are sent to windows when an area of the window is invalidated,
for example when window exposure in the windowing system changes.
A Window with a client area that is completely covered by another window, or
is otherwise not visible may be considered obscured by Qt and may in such

12
src/gui/kernel/qwindow.cpp
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@ -113,9 +113,10 @@ QT_BEGIN_NAMESPACE
physical area of the screen. On windowing systems that have exposure
notifications, the isExposed() accessor describes whether the window should
be treated as directly visible on screen. The exposeEvent() function is
called whenever the windows exposure in the windowing system changes. On
windowing systems that do not make this information visible to the
application, isExposed() will simply return the same value as isVisible().
called whenever an area of the window is invalidated, for example due to the
exposure in the windowing system changing. On windowing systems that do not
make this information visible to the application, isExposed() will simply
return the same value as isVisible().
QWindow::Visibility queried through visibility() is a convenience API
combining the functions of visible() and windowStates().
@ -2148,8 +2149,9 @@ bool QWindow::close()
}
/*!
The expose event (\a ev) is sent by the window system whenever the window's
exposure on screen changes.
The expose event (\a ev) is sent by the window system whenever an area of
the window is invalidated, for example due to the exposure in the windowing
system changing.
The application can start rendering into the window with QBackingStore
and QOpenGLContext as soon as it gets an exposeEvent() such that