78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
#pragma once
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#include <cstdint>
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#include "displayapp/TouchEvents.h"
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#include <lvgl/lvgl.h>
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namespace Pinetime {
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namespace Applications {
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class DisplayApp;
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namespace Screens {
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template <class T> class DirtyValue {
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public:
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DirtyValue() = default; // Use NSDMI
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explicit DirtyValue(T const& v) : value {v} {
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} // Use MIL and const-lvalue-ref
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bool IsUpdated() {
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if (this->isUpdated) {
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this->isUpdated = false;
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return true;
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}
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return false;
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}
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T const& Get() {
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this->isUpdated = false;
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return value;
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} // never expose a non-const lvalue-ref
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DirtyValue& operator=(const T& other) {
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if (this->value != other) {
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this->value = other;
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this->isUpdated = true;
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}
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return *this;
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}
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private:
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T value {}; // NSDMI - default initialise type
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bool isUpdated {true}; // NSDMI - use brace initialisation
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};
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class Screen {
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private:
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virtual void Refresh() {
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}
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public:
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explicit Screen(DisplayApp* app) : app {app} {
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}
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virtual ~Screen() = default;
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static void RefreshTaskCallback(lv_task_t* task);
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bool IsRunning() const {
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return running;
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}
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/** @return false if the button hasn't been handled by the app, true if it has been handled */
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virtual bool OnButtonPushed() {
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return false;
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}
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/** @return false if the event hasn't been handled by the app, true if it has been handled */
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// Returning true will cancel lvgl tap
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virtual bool OnTouchEvent(TouchEvents event) {
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return false;
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}
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virtual bool OnTouchEvent(uint16_t x, uint16_t y) {
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return false;
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}
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protected:
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DisplayApp* app;
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bool running = true;
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};
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}
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}
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}
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