最专业的营销网站建设公司哪家好,济南软件外包公司,网页设计模板 中文,南通网络科技的公司网站在显示GUI的过程中需要对某些对象进行临时隐藏或临时显示,因此需要对该对象的FLAG进行配置就可以实现对象的显示和隐藏了.
调用如下接口可以实现: lv_obj_add_flag(user_obj, LV_OBJ_FLAG_HIDDEN);//隐藏对象lv_obj_clear_flag(user_obj, LV_OBJ_FLAG_HIDDEN);//取消隐藏实现的…在显示GUI的过程中需要对某些对象进行临时隐藏或临时显示,因此需要对该对象的FLAG进行配置就可以实现对象的显示和隐藏了.
调用如下接口可以实现: lv_obj_add_flag(user_obj, LV_OBJ_FLAG_HIDDEN);//隐藏对象lv_obj_clear_flag(user_obj, LV_OBJ_FLAG_HIDDEN);//取消隐藏实现的函数如下:
/*-----------------* Attribute set*----------------*/void lv_obj_add_flag(lv_obj_t * obj, lv_obj_flag_t f)
{LV_ASSERT_OBJ(obj, MY_CLASS);bool was_on_layout lv_obj_is_layout_positioned(obj);if(f LV_OBJ_FLAG_HIDDEN) lv_obj_invalidate(obj);obj-flags | f;if(f LV_OBJ_FLAG_HIDDEN) {lv_obj_invalidate(obj);}if((was_on_layout ! lv_obj_is_layout_positioned(obj)) || (f (LV_OBJ_FLAG_LAYOUT_1 | LV_OBJ_FLAG_LAYOUT_2))) {lv_obj_mark_layout_as_dirty(lv_obj_get_parent(obj));lv_obj_mark_layout_as_dirty(obj);}if(f LV_OBJ_FLAG_SCROLLABLE) {lv_area_t hor_area, ver_area;lv_obj_get_scrollbar_area(obj, hor_area, ver_area);lv_obj_invalidate_area(obj, hor_area);lv_obj_invalidate_area(obj, ver_area);}
}
void lv_obj_clear_flag(lv_obj_t * obj, lv_obj_flag_t f)
{LV_ASSERT_OBJ(obj, MY_CLASS);bool was_on_layout lv_obj_is_layout_positioned(obj);if(f LV_OBJ_FLAG_SCROLLABLE) {lv_area_t hor_area, ver_area;lv_obj_get_scrollbar_area(obj, hor_area, ver_area);lv_obj_invalidate_area(obj, hor_area);lv_obj_invalidate_area(obj, ver_area);}obj-flags (~f);if(f LV_OBJ_FLAG_HIDDEN) {lv_obj_invalidate(obj);if(lv_obj_is_layout_positioned(obj)) {lv_obj_mark_layout_as_dirty(lv_obj_get_parent(obj));lv_obj_mark_layout_as_dirty(obj);}}if((was_on_layout ! lv_obj_is_layout_positioned(obj)) || (f (LV_OBJ_FLAG_LAYOUT_1 | LV_OBJ_FLAG_LAYOUT_2))) {lv_obj_mark_layout_as_dirty(lv_obj_get_parent(obj));}}
其中还有很多其他配置如下:
/*** On/Off features controlling the objects behavior.* OR-ed values are possible*/
enum {LV_OBJ_FLAG_HIDDEN (1L 0), /** Make the object hidden. (Like it wasnt there at all)*/LV_OBJ_FLAG_CLICKABLE (1L 1), /** Make the object clickable by the input devices*/LV_OBJ_FLAG_CLICK_FOCUSABLE (1L 2), /** Add focused state to the object when clicked*/LV_OBJ_FLAG_CHECKABLE (1L 3), /** Toggle checked state when the object is clicked*/LV_OBJ_FLAG_SCROLLABLE (1L 4), /** Make the object scrollable*/LV_OBJ_FLAG_SCROLL_ELASTIC (1L 5), /** Allow scrolling inside but with slower speed*/LV_OBJ_FLAG_SCROLL_MOMENTUM (1L 6), /** Make the object scroll further when thrown*/LV_OBJ_FLAG_SCROLL_ONE (1L 7), /** Allow scrolling only one snappable children*/LV_OBJ_FLAG_SCROLL_CHAIN_HOR (1L 8), /** Allow propagating the horizontal scroll to a parent*/LV_OBJ_FLAG_SCROLL_CHAIN_VER (1L 9), /** Allow propagating the vertical scroll to a parent*/LV_OBJ_FLAG_SCROLL_CHAIN (LV_OBJ_FLAG_SCROLL_CHAIN_HOR | LV_OBJ_FLAG_SCROLL_CHAIN_VER),LV_OBJ_FLAG_SCROLL_ON_FOCUS (1L 10), /** Automatically scroll object to make it visible when focused*/LV_OBJ_FLAG_SCROLL_WITH_ARROW (1L 11), /** Allow scrolling the focused object with arrow keys*/LV_OBJ_FLAG_SNAPPABLE (1L 12), /** If scroll snap is enabled on the parent it can snap to this object*/LV_OBJ_FLAG_PRESS_LOCK (1L 13), /** Keep the object pressed even if the press slid from the object*/LV_OBJ_FLAG_EVENT_BUBBLE (1L 14), /** Propagate the events to the parent too*/LV_OBJ_FLAG_GESTURE_BUBBLE (1L 15), /** Propagate the gestures to the parent*/LV_OBJ_FLAG_ADV_HITTEST (1L 16), /** Allow performing more accurate hit (click) test. E.g. consider rounded corners.*/LV_OBJ_FLAG_IGNORE_LAYOUT (1L 17), /** Make the object position-able by the layouts*/LV_OBJ_FLAG_FLOATING (1L 18), /** Do not scroll the object when the parent scrolls and ignore layout*/LV_OBJ_FLAG_OVERFLOW_VISIBLE (1L 19), /** Do not clip the childrens content to the parents boundary*/LV_OBJ_FLAG_LAYOUT_1 (1L 23), /** Custom flag, free to use by layouts*/LV_OBJ_FLAG_LAYOUT_2 (1L 24), /** Custom flag, free to use by layouts*/LV_OBJ_FLAG_WIDGET_1 (1L 25), /** Custom flag, free to use by widget*/LV_OBJ_FLAG_WIDGET_2 (1L 26), /** Custom flag, free to use by widget*/LV_OBJ_FLAG_USER_1 (1L 27), /** Custom flag, free to use by user*/LV_OBJ_FLAG_USER_2 (1L 28), /** Custom flag, free to use by user*/LV_OBJ_FLAG_USER_3 (1L 29), /** Custom flag, free to use by user*/LV_OBJ_FLAG_USER_4 (1L 30), /** Custom flag, free to use by user*/};
