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ubb-la/gui.c (gui): make panning zoom-dependent (2 samples at maximum zoom)

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This commit is contained in:
Werner Almesberger 2013-01-30 21:08:25 -03:00
parent 4fb2a8cbee
commit 435144223d
1 changed files with 12 additions and 4 deletions
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16
ubb-la/gui.c
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@ -206,6 +206,12 @@ static void update(void)
}
static int pos_step(int zoom)
{
return 1 << (MAX_ZOOM-zoom+1);
}
void gui(const uint8_t *buf, int skip, int nibbles)
{
SDL_Event event;
@ -235,12 +241,14 @@ void gui(const uint8_t *buf, int skip, int nibbles)
zoom--;
break;
case SDLK_LEFT:
if (pos)
pos--;
pos -= pos_step(zoom);
if (pos < 0)
pos = 0;
break;
case SDLK_RIGHT:
if (pos < nibbles-1)
pos++;
pos += pos_step(zoom);
if (pos > nibbles-1)
pos = nibbles-1;
break;
case SDLK_RETURN:
case SDLK_q: