Add Slider Class

Add brightness slider to the display settings class.

Platformio/OmoteUI/core/ScreenManager.cpp

@@ -10,7 +10,9 @@ Manager &Manager::getInstance() { return mManager; }
 Manager::Manager() {}
 
 void Manager::pushScreen(Screen::Base::Ptr aScreen) {
-  mScreens.back()->OnHide();
+  if (!mScreens.empty()) {
+    mScreens.back()->OnHide();
+  }
   mScreens.push_back(std::move(aScreen));
   mScreens.back()->Show();
 }

Platformio/OmoteUI/core/page/DisplaySettings.cpp

@@ -1,6 +1,15 @@
 #include "DisplaySettings.hpp"
+#include "Slider.hpp"
 
 using namespace UI::Page;
 
 DisplaySettings::DisplaySettings(std::shared_ptr<DisplayAbstract> aDisplay)
-    : Base(UI::ID::Pages::DisplaySettings), mDisplay(aDisplay) {}
+    : Base(UI::ID::Pages::DisplaySettings), mDisplay(aDisplay) {
+  auto slider = std::make_unique<Widget::Slider>(
+      [this](auto aNewBrightness) { mDisplay->setBrightness(aNewBrightness); },
+      0, 255);
+  slider->AlignTo(this, LV_ALIGN_CENTER);
+  slider->SetWidth(GetContentWidth());
+  slider->SetHeight(lv_pct(10));
+  AddWidget(std::move(slider));
+}

Platformio/OmoteUI/core/widget/Slider.cpp

@@ -0,0 +1,30 @@
+#include "Slider.hpp"
+#include "BackgroundScreen.hpp"
+#include "LvglResourceManger.hpp"
+
+using namespace UI::Widget;
+
+Slider::Slider(std::function<void(int32_t)> aOnSliderValueChange,
+               int32_t aMinVal, int32_t aMaxVal)
+    : Base(lv_slider_create(UI::Screen::BackgroundScreen::getLvInstance())),
+      mOnSliderChange(std::move(aOnSliderValueChange)) {
+  auto lock = LvglResourceManger::GetInstance().scopeLock();
+  lv_slider_set_range(LvglSelf(), aMinVal, aMaxVal);
+}
+
+int32_t Slider::GetValue() {
+  auto lock = LvglResourceManger::GetInstance().scopeLock();
+  return lv_slider_get_value(LvglSelf());
+}
+
+void Slider::SetValue(int32_t aValue, lv_anim_enable_t aIsAnimate) {
+  LvglResourceManger::GetInstance().AttemptNow([this, aValue, aIsAnimate] {
+    lv_slider_set_value(LvglSelf(), aValue, aIsAnimate);
+  });
+}
+
+void Slider::OnLvglEvent(lv_event_t *anEvent) {
+  if (anEvent->code == LV_EVENT_VALUE_CHANGED) {
+    mOnSliderChange(GetValue());
+  }
+}

Platformio/OmoteUI/core/widget/Slider.hpp

@@ -0,0 +1,19 @@
+#include "WidgetBase.hpp"
+
+namespace UI::Widget {
+class Slider : public Base {
+public:
+  Slider(std::function<void(int32_t)> OnSliderValueChange, int32_t aMinVal = 0,
+         int32_t aMaxVal = 100);
+
+  int32_t GetValue();
+  void SetValue(int32_t aValue, lv_anim_enable_t aIsAnimate = LV_ANIM_ON);
+
+protected:
+  void OnLvglEvent(lv_event_t *anEvent) override;
+
+private:
+  std::function<void(int32_t)> mOnSliderChange;
+};
+
+} // namespace UI::Widget