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Touchscreen: Improved scroll threshold

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Remove the hardcoded (and way too small) scroll threshold (the distance moved in pixels before we think the users wants to scroll) and replace it with something based on the actual DPI of the screen.
On Android we call the API for that, on other touchscreens we reimplemented Android's formula (as of 2.2) and calculate it.

Flyspray: 11727

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28548 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-11-10 15:25:15 +00:00
parent e134021e1b
commit 33af0dec28
13 changed files with 115 additions and 3 deletions
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6
firmware/target/hosted/sdl/lcd-sdl.c
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@ -111,3 +111,9 @@ void sdl_set_gradient(SDL_Surface *surface, SDL_Color *start, SDL_Color *end,
SDL_SetPalette(surface, SDL_LOGPAL|SDL_PHYSPAL, palette, first, steps);
}
int lcd_get_dpi(void)
{
/* TODO: find a way to query it from the OS, SDL doesn't support it
* directly; for now assume the more or less standard 96 */
return 96;
}