diff options
Diffstat (limited to 'src/gui/kernel/qplatformscreen_qpa.cpp')
| -rw-r--r-- | src/gui/kernel/qplatformscreen_qpa.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/gui/kernel/qplatformscreen_qpa.cpp b/src/gui/kernel/qplatformscreen_qpa.cpp index 478d2d6..5e80ba8 100644 --- a/src/gui/kernel/qplatformscreen_qpa.cpp +++ b/src/gui/kernel/qplatformscreen_qpa.cpp @@ -43,6 +43,12 @@ #include <QtGui/qapplication.h> #include <QtGui/qdesktopwidget.h> +/*! + Return the given top level widget for a given position. + + Default implementation retrieves a list of all top level widgets and finds the first widget + which contains point \a pos +*/ QWidget *QPlatformScreen::topLevelAt(const QPoint & pos) const { QWidgetList list = QApplication::topLevelWidgets(); @@ -56,6 +62,13 @@ QWidget *QPlatformScreen::topLevelAt(const QPoint & pos) const return 0; } +/*! \fn physicalSize() const + Reimplement in subclass to return the physical size of the screen. This function is used by + QFont to convert point sizes to pixel sizes. + + Default implementation takes the pixel size of the screen, considers a dpi of 100 and returns + the calculated (and probably wrong) physical size +*/ QSize QPlatformScreen::physicalSize() const { static const int dpi = 100; @@ -64,3 +77,38 @@ QSize QPlatformScreen::physicalSize() const return QSize(width,height); } +/*! + \class QPlatformScreen + \since 4.8 + \internal + \preliminary + \ingroup qpa + + \brief The QPlatformScreen class provides an abstraction for visual displays. + + Many window systems has support for retrieving information on the attached displays. To be able + to query the display QPA uses QPlatformScreen. Qt its self is most dependent on the + physicalSize() function, since this is the function it uses to calculate the dpi to use when + converting point sizes to pixels sizes. However, this is unfortunate on some systems, as the + native system fakes its dpi size. + + QPlatformScreen is also used by the public api QDesktopWidget for information about the desktop. + */ + +/*! \fn geometry() const + Reimplement in subclass to return the pixel geometry of the screen +*/ + +/*! \fn availableGeometry() const + Reimplement in subclass to return the pixel geometry of the available space + This normally is the desktop screen minus the task manager, global menubar etc. +*/ + +/*! \fn depth() const + Reimplement in subclass to return current depth of the screen +*/ + +/*! \fn format() const + Reimplement in subclass to return the image format which corresponds to the screen format +*/ + |