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https://issues.apache.org/jira/browse/FLEX-26657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Mclean reassigned FLEX-26657:
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Assignee: (was: Adobe JIRA)
> Developers are able to override the DPI bucket, but not the exact device DPI
> ----------------------------------------------------------------------------
>
> Key: FLEX-26657
> URL: https://issues.apache.org/jira/browse/FLEX-26657
> Project: Apache Flex
> Issue Type: Improvement
> Components: Mobile: Density
> Affects Versions: Adobe Flex SDK Previous
> Environment: Affected OS(s): All OS Platforms
> Affected OS(s): All OS Platforms
> Language Found: English
> Reporter: Adobe JIRA
> Priority: Minor
>
> One of the main reasons behind the "Override Default Density Mapping" feature
> (http://opensource.adobe.com/wiki/display/flexsdk/Override+Default+Density+Mapping)
> was to allow developers to customize the DPI bucket choice for devices that
> incorrectly report their DPI.
> However there are places in the SDK code that depend on the exact device DPI
> and not the bucketed DPI. For example touch scrolling has a "slop" threshold
> between selection and scrolling that is equal to 0.079365 inches (20 pixels
> on a Nexus One). This value is currently multiplied by
> Capabilities.screenDPI of the device to get the number of pixels on that
> device. If the device is reporting the wrong DPI then this slop will be
> incorrect.
> Skinning, scaling, and multi-resolution bitmaps acts upon the bucketed DPI
> values, but things related to physical touch don't care about the bucketed
> DPI but instead should act on the exact DPI of the device.
> RunTimeDPIProvider should provide a getter like runtimeDPI except called
> something like "exactRuntimeDPI" that is overridable in the same fashion. By
> default that method would return Capabilities.screenDPI and developers can
> override it if they need to when they override the bucket behavior. The SDK
> should always use this value rather than Capabilities.screenDPI and
> developers building on top of the SDK will probably want to do the same.
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