lv_obj_set_style_bg_color作用是什么,可以填入的颜色参数有哪些?第三个参数又是什么
时间: 2024-06-05 18:07:21 浏览: 164
lv_obj_set_style_bg_color函数的作用是设置对象的背景颜色。可以填入的颜色参数包括LV_COLOR_BLACK,LV_COLOR_BLUE,LV_COLOR_NAVY,LV_COLOR_PURPLE,LV_COLOR_GRAY,LV_COLOR_SILVER,LV_COLOR_OLIVE,LV_COLOR_GREEN,LV_COLOR_LIME,LV_COLOR_TEAL,LV_COLOR_CYAN,LV_COLOR_ORANGE,LV_COLOR_RED,LV_COLOR_MAROON,LV_COLOR_YELLOW,LV_COLOR_WHITE等等。第三个参数是一个指针,指向样式表,它和第二个参数一起来设置样式表的属性。
相关问题
case KEY_CODE_UP: next_index = index > SET_ID_VOLUME ? (index - 1) : (SET_ID_VOICE_ASSISTANT_SWITCH); next_list = lv_obj_get_child(p_setting_win, next_index); next_bg = lv_obj_get_child(next_list,0); ws01_setting_list_group[next_index].selected = true; ws01_setting_list_group[index].selected = false; lv_obj_remove_style(list, &style_btn_focus, 0); lv_obj_set_style_bg_color(bg, lv_color_hex(0x2e3033), 0); lv_obj_add_style(next_list, &style_btn_focus, 0); lv_obj_set_style_bg_color(next_bg, lv_color_hex(0x558dff), 0); lv_obj_scroll_to_view(next_list, LV_ANIM_OFF); break; case KEY_CODE_DOWN: next_index = index < SET_ID_VOICE_ASSISTANT_SWITCH ? (index + 1) : (SET_ID_VOLUME); next_list = lv_obj_get_child(p_setting_win, next_index); next_bg = lv_obj_get_child(next_list,0); ws01_setting_list_group[next_index].selected = true; ws01_setting_list_group[index].selected = false; lv_obj_remove_style(list, &style_btn_focus, 0); lv_obj_set_style_bg_color(bg, lv_color_hex(0x2e3033), 0); lv_obj_add_style(next_list, &style_btn_focus, 0); lv_obj_set_style_bg_color(next_bg, lv_color_hex(0x558dff), 0); lv_obj_scroll_to_view(next_list, LV_ANIM_OFF); break;
这段代码是用来处理按键操作的。KEY_CODE_UP 表示上移按键,KEY_CODE_DOWN 表示下移按键。当按下上移按键时,会选择上一个选项,当按下下移按键时,会选择下一个选项。同时,还会修改选项的背景颜色,以表示当前选中的选项。其中,lv_obj_get_child 函数用来获取指定对象的指定子对象,lv_obj_remove_style 函数用来移除指定对象的指定样式,lv_obj_add_style 函数用来添加指定对象的指定样式,lv_obj_set_style_bg_color 函数用来设置指定对象的背景颜色,lv_obj_scroll_to_view 函数用来滚动对象到可见区域。
lv_obj_set_style_bg_color
lv_obj_set_style_bg_color是一个函数,用于设置对象的背景颜色。它接受三个参数:对象指针、颜色值和部分参数。通过调用这个函数,可以将指定对象的背景颜色设置为指定的颜色值。\[1\]在引用的代码示例中,使用了lv_obj_set_style_bg_color函数来设置父对象和子对象的背景颜色。\[2\]这个函数还可以与其他设置函数一起使用,比如设置边框颜色、边框宽度、内边距和圆角半径等。\[3\]
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