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| author | Samuel Rødal <samuel.rodal@nokia.com> | 2011-11-22 10:53:40 +0100 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2011-11-24 16:46:15 +0100 |
| commit | 11bf824c03d07a2c4ac7f1d614351c532d7a52d6 (patch) | |
| tree | 9239a7b43ffcd227299bccbfa9531f7f225a1d24 /src/gui/kernel/qscreen.cpp | |
| parent | 502b5b81784bd683b0571b1d72e76b3d786b98e1 (diff) | |
| download | qtbase-11bf824c03d07a2c4ac7f1d614351c532d7a52d6.tar.gz | |
Add a note in the QScreen documentation about logical vs physical DPI.
Change-Id: I1d536711cbbc0ea8a21c6917e5e0066c1ad4ccae
Reviewed-by: Alan Alpert <alan.alpert@nokia.com>
Diffstat (limited to 'src/gui/kernel/qscreen.cpp')
| -rw-r--r-- | src/gui/kernel/qscreen.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/gui/kernel/qscreen.cpp b/src/gui/kernel/qscreen.cpp index 7d83cebd2b..682e42ad4c 100644 --- a/src/gui/kernel/qscreen.cpp +++ b/src/gui/kernel/qscreen.cpp @@ -61,6 +61,17 @@ public: \class QScreen \brief The QScreen class is used to query screen properties. + A note on logical vs physical dots per inch: physical DPI is based on the + actual physical pixel sizes when available, and is useful for print preview + and other cases where it's desirable to know the exact physical dimensions + of screen displayed contents. + + Logical dots per inch are used to convert font and user interface elements + from point sizes to pixel sizes, and might be different from the physical + dots per inch. The logical dots per inch are sometimes user-settable in the + desktop environment's settings panel, to let the user globally control UI + and font sizes in different applications. + \inmodule QtGui */ |