7c089e395a
Make Tabview a friend of Base Page to allow it to notify pages that they are hidden or showing. Implement the notification in Tabview to allow pages to know they are showing.
71 lines
No EOL
1.9 KiB
C++
71 lines
No EOL
1.9 KiB
C++
#pragma once
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#include "UIElementIds.hpp"
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#include "lvgl.h"
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namespace UI {
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class UIElement {
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public:
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UIElement(lv_obj_t *aLvglSelf, const ID aId = ID());
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virtual void SetBgColor(lv_color_t value,
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lv_style_selector_t selector = LV_PART_MAIN);
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void SetVisiblity(bool aVisibility);
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bool IsVisible();
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virtual void SetWidth(uint16_t aWidth);
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virtual void SetHeight(uint16_t aHeight);
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int16_t GetWidth();
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int16_t GetHeight();
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virtual void AddElement(UIElement *anElement);
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ID GetID() { return mId; };
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template <class UIElemTy> static UIElemTy GetElement(lv_obj_t *aLvglObject);
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protected:
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/// @brief get Lvgl object refernce to use in LVGL APIs
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/// @return lvgl object a
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lv_obj_t *LvglSelf() { return mLvglSelf; }
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/// @brief Show Element
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virtual void Show();
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/// @brief Hide Element
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virtual void Hide();
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/// @brief Override in child class to run something after element is shown
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virtual void OnShow() = 0;
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/// @brief Override in child class to run something after element is hidden
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virtual void OnHide() = 0;
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private:
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lv_obj_t *mLvglSelf;
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const ID mId;
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};
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/**
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* @brief This helper allows conversion between anLvglObject and a
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* core element by using the user data that links the LVGL object
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* to its C++ counterpart. Do note that it is possible that this
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* user data is not always there if the Lvgl Object has not been wrapped
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* by UIElement
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*
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* @tparam UIElemTy - Type of element you want to cast to
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* @param aLvglObject - object to extract User data from
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* @return UIElemTy - object stored in user data (See constructor of
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* UIElement)
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*/
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template <class UIElemTy>
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UIElemTy UIElement::GetElement(lv_obj_t *aLvglObject) {
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auto UIElement = lv_obj_get_user_data(aLvglObject);
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if (UIElement) {
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return static_cast<UIElemTy>(UIElement);
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}
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return nullptr;
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}
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} // namespace UI
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