The QSystemDisplayInfo class provides access to display information from the system. More...
#include <QSystemDisplayInfo>Inherits: QObject.
This class was introduced in Qt Mobility 1.0.
| enum | BacklightState { BacklightStateUnknown, BacklightStateOff, BacklightStateDimmed, BacklightStateOn } |
| enum | DisplayOrientation { Unknown, Landscape, Portrait, InvertedLandscape, InvertedPortrait } |
| QSystemDisplayInfo ( QObject * parent = 0 ) | |
| ~QSystemDisplayInfo () | |
| QSystemDisplayInfo::BacklightState | backlightStatus ( int screen ) |
| float | contrast ( int screen ) |
| int | getDPIHeight ( int screen ) |
| int | getDPIWidth ( int screen ) |
| QSystemDisplayInfo::DisplayOrientation | orientation ( int screen ) |
| int | physicalHeight ( int screen ) |
| int | physicalWidth ( int screen ) |
| void | orientationChanged ( QSystemDisplayInfo::DisplayOrientation orientation ) |
| int | colorDepth ( int screenNumber ) |
| int | displayBrightness ( int screenNumber ) |
The QSystemDisplayInfo class provides access to display information from the system.
Warning: This class can only be used from the main thread, since it has been implemented using GUI functionality.
This enum describes the state of the Backlight.
| Constant | Value | Description |
|---|---|---|
| QSystemDisplayInfo::BacklightStateUnknown | -1 | Error, no, or unknown Backlight state. |
| QSystemDisplayInfo::BacklightStateOff | 0 | Backlight is turned off. |
| QSystemDisplayInfo::BacklightStateDimmed | 1 | Backlight has been dimmed. |
| QSystemDisplayInfo::BacklightStateOn | 2 | Backlight is on. |
This enum describes the orientation of the default window.
| Constant | Value | Description |
|---|---|---|
| QSystemDisplayInfo::Unknown | 0 | Unknown orientation or error. |
| QSystemDisplayInfo::Landscape | 1 | Landscape is wider than high. |
| QSystemDisplayInfo::Portrait | 2 | Portrait is higher than wide. |
| QSystemDisplayInfo::InvertedLandscape | 3 | Landscape that is inverted. |
| QSystemDisplayInfo::InvertedPortrait | 4 | Portrait that is inverted. |
Constructs a QSystemDisplayInfo object with the given parent.
Destroys the QSystemDisplayInfo object.
Returns whether the QSystemDisplayInfo::BacklightState for the screen screen.
This function was introduced in Qt Mobility 1.2.
Returns the color depth of the screen with the index screenNumber, in bits per pixel. -1 is returned if not available or on error.
This function was introduced in Qt Mobility 1.0.
See also QDesktopWidget::screenCount().
Returns the current contrast of the screen screen, from 0 to 1. -1 is returned if not available or on error.
This function was introduced in Qt Mobility 1.2.
See also QDesktopWidget::screenCount().
Returns the display brightness of the screen with index screenNumber, in 1 - 100 scale. -1 is returned if not available or on error.
This function was introduced in Qt Mobility 1.0.
See also QDesktopWidget::screenCount().
Returns the dpi (Dot Per Inch) of the height os screen. -1 is returned if not available or on error.
This function was introduced in Qt Mobility 1.2.
See also QDesktopWidget::screenCount().
Returns the current dots per inch (DPI) for the width of screen. -1 is returned if not available or on error.
This function was introduced in Qt Mobility 1.2.
See also QDesktopWidget::screenCount().
Returns the orientation of the UI QDesktopWidget for screen.
This function was introduced in Qt Mobility 1.2.
See also QDesktopWidget::screenCount().
This signal is emitted when QDesktopWidget's orientation has changed to orientation.
Returns the physical height of the screen in millimeters. -1 is returned if not available or on error.
This function was introduced in Qt Mobility 1.2.
See also QDesktopWidget::screenCount().
Returns the physical width of screen in millimeters. -1 is returned if not available or on error.
This function was introduced in Qt Mobility 1.2.
See also QDesktopWidget::screenCount().