Implement the large font for accessibility.

[wanchao-xu]

• The system setting provide enum value for font size (SYSTEM_SETTINGS_FONT_SIZE_SMALL, SYSTEM_SETTINGS_FONT_SIZE_NORMAL, SYSTEM_SETTINGS_FONT_SIZE_LARGE, SYSTEM_SETTINGS_FONT_SIZE_HUGE and SYSTEM_SETTINGS_FONT_SIZE_GIANT).

#define MIDDLE_FONT_DPI                   (-100)
#define SMALL_FONT_DPI                     (-80)
#define LARGE_FONT_DPI                      (-150)
#define HUGE_FONT_DPI                       (-190)
#define GIANT_FONT_DPI                      (-250)

[swift-kim]

@WonyoungChoi Do you have any idea about the windows gclient sync failure? It keeps failing for some reason.

[WonyoungChoi]

@swift-kim It's strange.. I'm trying to reproduce the error on my local environment.

Error

________ running 'python3 src/flutter/tools/download_dart_sdk.py --fail-loudly' in 'C:\workspace\engine'
Traceback (most recent call last):

  File "src/flutter/tools/download_dart_sdk.py", line 293, in <module>

    sys.exit(Main())

  File "src/flutter/tools/download_dart_sdk.py", line 242, in Main

    version = utils.ReadVersionFile()

AttributeError: module 'utils' has no attribute 'ReadVersionFile'

[swift-kim]

I tested this change on mobile/wearable and it worked very well. Good job.

(But I personally wish there is a medium font size between "normal" and "large" because 1.5 feels too large, especially on wearable.)

[swift-kim]

Will this feature be supported on TV devices as well? (e.g. by enabling Focus Magnification in the accessibility settings)

[wanchao-xu]

Will this feature be supported on TV devices as well? (e.g. by enabling Focus Magnification in the accessibility settings)

I don't find the font size setting on TV, so I think this feature isn't supported on TV. The accessibility settings has enlarge mode to magnify all widget, not only font. and enlarge is implemened by Tizen.TV.FLUX.NUI.