Diffstat (limited to 'src/gui/kernel/qscreen.cpp')
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
@@ -61,6 +61,17 @@ public:
\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.