embed LVGL touch management inside H7_Video library

Author: leonardocavagnis

libraries/H7_Video/examples/LVGLDemo/LVGLDemo.ino

@@ -27,13 +27,8 @@ void setup() {
   giga_touch_setup();
 
   Display.begin();
-
-  static lv_indev_drv_t indev_drv;                            /* Descriptor of a input device driver */
-  lv_indev_drv_init(&indev_drv);                              /* Basic initialization */
-  indev_drv.type = LV_INDEV_TYPE_POINTER;                     /* Touch pad is a pointer-like device */
-  indev_drv.read_cb = my_touchpad_read;                       /* Set your driver function */
-  lv_indev_t * my_indev = lv_indev_drv_register(&indev_drv);  /* Register the driver in LVGL and save the created input device object */
-
+  Display.attachLVGLTouchCb((void (*)(void*,void*))(my_touchpad_read));
+  
   /* Change the active screen's background color */
   lv_obj_set_style_bg_color(lv_scr_act(), lv_color_hex(0x03989e), LV_PART_MAIN);
 

libraries/H7_Video/src/H7_Video.cpp

@@ -123,4 +123,12 @@ void lvgl_displayFlushing(lv_disp_drv_t * disp, const lv_area_t * area, lv_color
     stm32_LCD_DrawImage((void *) color_p, (void *)(getCurrentFrameBuffer() + offsetPos), width, height, DMA2D_INPUT_RGB565);
     lv_disp_flush_ready(disp);         /* Indicate you are ready with the flushing*/
 }
+
+void H7_Video::attachLVGLTouchCb(void (*touch_cb)(void*,void*)) {
+  static lv_indev_drv_t indev_drv;                                                /* Descriptor of a input device driver */
+  lv_indev_drv_init(&indev_drv);                                                  /* Basic initialization */
+  indev_drv.type = LV_INDEV_TYPE_POINTER;                                         /* Touch pad is a pointer-like device */
+  indev_drv.read_cb = (void(*)(lv_indev_drv_t *, lv_indev_data_t *))(touch_cb);   /* Set your driver function */
+  lv_indev_t * my_indev = lv_indev_drv_register(&indev_drv);                      /* Register the driver in LVGL and save the created input device object */
+}
 #endif

libraries/H7_Video/src/H7_Video.h

@@ -28,6 +28,8 @@ class H7_Video : public ArduinoGraphics {
   virtual void endDraw();
 
   virtual void set(int x, int y, uint8_t r, uint8_t g, uint8_t b);
+
+  void attachLVGLTouchCb(void (*touch_cb)(void*,void*));
 private:
     DisplayShieldModel  _shield;
     bool                _landscape;