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Add Qt::AA_UseHighDpiPixmaps.

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Setting this attribute enables QIcon::pixmap() to return
high-dpi pixmaps when running on "retina" type displays.

This requires an opt-in flag since the returned pixmap
can be larger than the requested size, which is a change
in previous documented behaviour that can break existing
code.

Change-Id: I5ff3d25c68de24aa4eda7ad1f8aa9199da04707e
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
This commit is contained in:
Morten Johan Sørvig 2013-03-01 11:38:19 +01:00 committed by The Qt Project
parent b11317a643
commit b74ba4e198
2 changed files with 9 additions and 0 deletions
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1
src/corelib/global/qnamespace.h
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@ -498,6 +498,7 @@ public:
AA_X11InitThreads = 10, AA_X11InitThreads = 10,
AA_SynthesizeTouchForUnhandledMouseEvents = 11, AA_SynthesizeTouchForUnhandledMouseEvents = 11,
AA_SynthesizeMouseForUnhandledTouchEvents = 12, AA_SynthesizeMouseForUnhandledTouchEvents = 12,
AA_UseHighDpiPixmaps = 13,
// Add new attributes before this line // Add new attributes before this line
AA_AttributeCount AA_AttributeCount

8
src/corelib/global/qnamespace.qdoc
View File

@ -167,6 +167,14 @@
to left button mouse events instead. This attribute is enabled to left button mouse events instead. This attribute is enabled
by default. by default.
\value AA_UseHighDpiPixmaps Make QIcon::pixmap() generate high-dpi pixmaps
that can be larger than the requested size. Such pixmaps will have
devicePixelRatio set to a value higher than 1.
After setting this attribute application code that uses pixmap
sizes in layout geometry calculations should typically divide by
QPixmap::devicePixelRatio() to get device-independent layout geometry.
\omitvalue AA_AttributeCount \omitvalue AA_AttributeCount
*/ */