Add calibration methods and app (#520)

Tactility/Source/app/display/Display.cpp

@@ -7,7 +7,9 @@
 #endif
 
 #include <Tactility/Logger.h>
+#include <Tactility/app/App.h>
 #include <Tactility/hal/display/DisplayDevice.h>
+#include <Tactility/hal/touch/TouchDevice.h>
 #include <Tactility/lvgl/Toolbar.h>
 #include <Tactility/settings/DisplaySettings.h>
 
@@ -22,6 +24,16 @@ static std::shared_ptr<hal::display::DisplayDevice> getHalDisplay() {
     return hal::findFirstDevice<hal::display::DisplayDevice>(hal::Device::Type::Display);
 }
 
+static bool hasCalibratableTouchDevice() {
+    auto touch_devices = hal::findDevices<hal::touch::TouchDevice>(hal::Device::Type::Touch);
+    for (const auto& touch_device : touch_devices) {
+        if (touch_device != nullptr && touch_device->supportsCalibration()) {
+            return true;
+        }
+    }
+    return false;
+}
+
 class DisplayApp final : public App {
 
     settings::display::DisplaySettings displaySettings;
@@ -119,6 +131,10 @@ class DisplayApp final : public App {
         }
     }
 
+    static void onCalibrateTouchClicked(lv_event_t*) {
+        app::start("TouchCalibration");
+    }
+
 public:
 
     void onShow(AppContext& app, lv_obj_t* parent) override {
@@ -278,6 +294,25 @@ public:
                 lv_obj_add_state(screensaverDropdown, LV_STATE_DISABLED);
             }
         }
+
+        if (hasCalibratableTouchDevice()) {
+            auto* calibrate_wrapper = lv_obj_create(main_wrapper);
+            lv_obj_set_size(calibrate_wrapper, LV_PCT(100), LV_SIZE_CONTENT);
+            lv_obj_set_style_pad_all(calibrate_wrapper, 0, LV_STATE_DEFAULT);
+            lv_obj_set_style_border_width(calibrate_wrapper, 0, LV_STATE_DEFAULT);
+
+            auto* calibrate_label = lv_label_create(calibrate_wrapper);
+            lv_label_set_text(calibrate_label, "Touch calibration");
+            lv_obj_align(calibrate_label, LV_ALIGN_LEFT_MID, 0, 0);
+
+            auto* calibrate_button = lv_button_create(calibrate_wrapper);
+            lv_obj_align(calibrate_button, LV_ALIGN_RIGHT_MID, 0, 0);
+            lv_obj_add_event_cb(calibrate_button, onCalibrateTouchClicked, LV_EVENT_SHORT_CLICKED, this);
+
+            auto* calibrate_button_label = lv_label_create(calibrate_button);
+            lv_label_set_text(calibrate_button_label, "Calibrate");
+            lv_obj_center(calibrate_button_label);
+        }
     }
 
     void onHide(AppContext& app) override {