<itemvalue="The number of device pixels for each logical pixel for the screen this view is displayed on. This number might not be a power of two. Indeed, it might not even be an integer. For example, the Nexus 6 has a device pixel ratio of 3.5. Device pixels are also referred to as physical pixels. Logical pixels are also referred to as device-independent or resolution-independent pixels. By definition, there are roughly 38 logical pixels per centimeter, or about 96 logical pixels per inch, of the physical display. The value returned by [devicePixelRatio] is ultimately obtained either from the hardware itself, the device drivers, or a hard-coded value stored in the operating system or firmware, and may be inaccurate, sometimes by a significant margin. The Flutter framework operates in logical pixels, so it is rarely necessary to directly deal with this property. When this changes, [PlatformDispatcher.onMetricsChanged] is called. When using the Flutter framework, using [MediaQuery.of] to obtain the device pixel ratio (via [MediaQueryData.devicePixelRatio]), instead of directly obtaining the [devicePixelRatio] from a [FlutterView], will automatically cause any widgets dependent on this value to rebuild when it changes, without having to listen to [PlatformDispatcher.onMetricsChanged]. See also: [WidgetsBindingObserver], for a mechanism at the widgets layer to observe when this value changes. [Display.devicePixelRatio], which reports the DPR of the display. The value here is equal to the value exposed on [display]."/>
<itemvalue="Subsequent version, remove this deprecated member. ignore: deprecated_member_use"/>
<itemvalue="Dynamically loads the |EnableNonClientDpiScaling| from the User32 module. This API is only needed for PerMonitor V1 awareness mode."/>
dx
1 year ago