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Thomas Farstrike
0dc151255a
On ESP32, the keyboard buttons in light mode have no color, just white, which makes them hard to see on the white background. Probably a bug in the underlying LVGL or MicroPython or lvgl_micropython.
82 lines
3.1 KiB
Python
82 lines
3.1 KiB
Python
import lvgl as lv
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import mpos.config
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# Global style for keyboard button fix
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_keyboard_button_fix_style = None
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_is_light_mode = True
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def get_keyboard_button_fix_style():
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"""
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Get the keyboard button fix style for light mode.
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The LVGL default theme applies bg_color_white to keyboard buttons,
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which makes them white-on-white (invisible) in light mode.
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This function returns a custom style to override that.
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Returns:
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lv.style_t: Style to apply to keyboard buttons, or None if not needed
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"""
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global _keyboard_button_fix_style, _is_light_mode
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# Only return style in light mode
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if not _is_light_mode:
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return None
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# Create style if it doesn't exist
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if _keyboard_button_fix_style is None:
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_keyboard_button_fix_style = lv.style_t()
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_keyboard_button_fix_style.init()
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# Set button background to light gray (matches LVGL's intended design)
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# This provides contrast against white background
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# Using palette_lighten gives us the same gray as used in the theme
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gray_color = lv.palette_lighten(lv.PALETTE.GREY, 2)
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_keyboard_button_fix_style.set_bg_color(gray_color)
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_keyboard_button_fix_style.set_bg_opa(lv.OPA.COVER)
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return _keyboard_button_fix_style
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# On ESP32, the keyboard buttons in light mode have no color, just white,
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# which makes them hard to see on the white background. Probably a bug in the
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# underlying LVGL or MicroPython or lvgl_micropython.
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def fix_keyboard_button_style(keyboard):
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"""
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Apply keyboard button visibility fix to a keyboard instance.
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Call this function after creating a keyboard to ensure buttons
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are visible in light mode.
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Args:
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keyboard: The lv.keyboard instance to fix
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"""
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style = get_keyboard_button_fix_style()
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if style:
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keyboard.add_style(style, lv.PART.ITEMS)
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print(f"Applied keyboard button fix for light mode to keyboard instance")
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def set_theme(prefs):
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global _is_light_mode
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# Load and set theme:
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theme_light_dark = prefs.get_string("theme_light_dark", "light") # default to a light theme
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theme_dark_bool = ( theme_light_dark == "dark" )
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_is_light_mode = not theme_dark_bool # Track for keyboard button fix
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primary_color = lv.theme_get_color_primary(None)
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color_string = prefs.get_string("theme_primary_color")
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if color_string:
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try:
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color_string = color_string.replace("0x", "").replace("#", "").strip().lower()
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color_int = int(color_string, 16)
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print(f"Setting primary color: {color_int}")
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primary_color = lv.color_hex(color_int)
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except Exception as e:
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print(f"Converting color setting '{color_string}' to lv_color_hex() got exception: {e}")
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lv.theme_default_init(mpos.ui.main_display._disp_drv, primary_color, lv.color_hex(0xFBDC05), theme_dark_bool, lv.font_montserrat_12)
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#mpos.ui.main_display.set_theme(theme) # not needed, default theme is applied immediately
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# Recreate keyboard button fix style if mode changed
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global _keyboard_button_fix_style
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_keyboard_button_fix_style = None # Force recreation with new theme colors
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