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From "Jorn Nolles (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLEX-34556) Starting an app in portrait on an iPad results in wrong DPI
Date Mon, 29 Sep 2014 11:54:33 GMT
Jorn Nolles created FLEX-34556:
----------------------------------

             Summary: Starting an app in portrait on an iPad results in wrong DPI
                 Key: FLEX-34556
                 URL: https://issues.apache.org/jira/browse/FLEX-34556
             Project: Apache Flex
          Issue Type: Bug
          Components: Mobile: MobileApplication, Spark: Application
    Affects Versions: Apache Flex 4.13.0
         Environment: iOS 5.1, iOS 7, iOS 8
            Reporter: Jorn Nolles


*Reproduction*
# Create an mobile project.
# Set the 'applicationDPI' to '160'
# Add some components
# Now create a build for iOS

Start the app on the iPad while holding it in 'landscape' mode:
Result: all components are of the correct size

Start the app on the iPad while holding it in 'portrait' mode:
Result: the components are too small.

*Problem*
The mx.core.RuntimeDPIProvider has a bug while attempting to determine teh device width/hight
(in function runtimeDPI).

*Solution*
Don't use 'stage.fullScreenWidth' but use Capabilities.screenResolutionX.

{code}
public function get runtimeDPI():Number
{
	var isIOS:Boolean = Platform.isIOS;
	var screenDPI:Number = Capabilities.screenDPI;
	
	if (isIOS) // as isIPad returns false in the simulator
	{
		// The original code uses the stage width/height, which is not always set (if the app is
started on an iPad in portrait)
		var scX:Number = Capabilities.screenResolutionX;
		var scY:Number = Capabilities.screenResolutionY;
		/*  as of Dec 2013,  iPad (resp. iPad retina) are the only iOS devices to have 1024 (resp.
2048) screen width or height
		cf http://en.wikipedia.org/wiki/List_of_displays_by_pixel_density#Apple
		* */
		if ((scX == IPAD_RETINA_MAX_EXTENT || scY == IPAD_RETINA_MAX_EXTENT))
			return DPIClassification.DPI_320;
		else if (scX == IPAD_MAX_EXTENT || scY == IPAD_MAX_EXTENT)
			return DPIClassification.DPI_160;
	}
			
	return classifyDPI(screenDPI);
}
{code}

*Workaround*
Create an override on the runtimeDPI() getter...



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