1 files changed, 68 insertions, 1 deletions

diff --git a/src/displayapp/LittleVgl.cpp b/src/displayapp/LittleVgl.cpp
index 0e3fef9..e7b58c1 100644
--- a/src/displayapp/LittleVgl.cpp
+++ b/src/displayapp/LittleVgl.cpp
@@ -63,6 +63,23 @@ void LittleVgl::InitTouchpad() {
   lv_indev_drv_register(&indev_drv);
 }
 
+void LittleVgl::SetFullRefresh(FullRefreshDirections direction) {
+  if (scrollDirection == FullRefreshDirections::None) {
+    scrollDirection = direction;
+    if (scrollDirection == FullRefreshDirections::Down) {
+      lv_disp_set_direction(lv_disp_get_default(), 1);
+    } else if (scrollDirection == FullRefreshDirections::Right) {
+      lv_disp_set_direction(lv_disp_get_default(), 2);
+    } else if (scrollDirection == FullRefreshDirections::Left) {
+      lv_disp_set_direction(lv_disp_get_default(), 3);
+    } else if (scrollDirection == FullRefreshDirections::RightAnim) {
+      lv_disp_set_direction(lv_disp_get_default(), 5);
+    } else if (scrollDirection == FullRefreshDirections::LeftAnim) {
+      lv_disp_set_direction(lv_disp_get_default(), 4);
+    }
+  }
+}
+
 void LittleVgl::FlushDisplay(const lv_area_t* area, lv_color_t* color_p) {
   uint16_t y1, y2, width, height = 0;
 
@@ -70,13 +87,63 @@ void LittleVgl::FlushDisplay(const lv_area_t* area, lv_color_t* color_p) {
   // NOtification is still needed (even if there is a mutex on SPI) because of the DataCommand pin
   // which cannot be set/clear during a transfert.
 
+  if ((scrollDirection == LittleVgl::FullRefreshDirections::Down) && (area->y2 == visibleNbLines - 1)) {
+    writeOffset = ((writeOffset + totalNbLines) - visibleNbLines) % totalNbLines;
+  } else if ((scrollDirection == FullRefreshDirections::Up) && (area->y1 == 0)) {
+    writeOffset = (writeOffset + visibleNbLines) % totalNbLines;
+  }
+
   y1 = (area->y1 + writeOffset) % totalNbLines;
   y2 = (area->y2 + writeOffset) % totalNbLines;
 
   width = (area->x2 - area->x1) + 1;
   height = (area->y2 - area->y1) + 1;
 
-  // lv_disp_set_direction(lv_disp_get_default(), 0);
+  if (scrollDirection == LittleVgl::FullRefreshDirections::Down) {
+
+    if (area->y2 < visibleNbLines - 1) {
+      uint16_t toScroll = 0;
+      if (area->y1 == 0) {
+        toScroll = height * 2;
+        scrollDirection = FullRefreshDirections::None;
+        lv_disp_set_direction(lv_disp_get_default(), 0);
+      } else {
+        toScroll = height;
+      }
+
+      if (scrollOffset >= toScroll)
+        scrollOffset -= toScroll;
+      else {
+        toScroll -= scrollOffset;
+        scrollOffset = (totalNbLines) -toScroll;
+      }
+      lcd.VerticalScrollStartAddress(scrollOffset);
+    }
+
+  } else if (scrollDirection == FullRefreshDirections::Up) {
+
+    if (area->y1 > 0) {
+      if (area->y2 == visibleNbLines - 1) {
+        scrollOffset += (height * 2);
+        scrollDirection = FullRefreshDirections::None;
+        lv_disp_set_direction(lv_disp_get_default(), 0);
+      } else {
+        scrollOffset += height;
+      }
+      scrollOffset = scrollOffset % totalNbLines;
+      lcd.VerticalScrollStartAddress(scrollOffset);
+    }
+  } else if (scrollDirection == FullRefreshDirections::Left or scrollDirection == FullRefreshDirections::LeftAnim) {
+    if (area->x2 == visibleNbLines - 1) {
+      scrollDirection = FullRefreshDirections::None;
+      lv_disp_set_direction(lv_disp_get_default(), 0);
+    }
+  } else if (scrollDirection == FullRefreshDirections::Right or scrollDirection == FullRefreshDirections::RightAnim) {
+    if (area->x1 == 0) {
+      scrollDirection = FullRefreshDirections::None;
+      lv_disp_set_direction(lv_disp_get_default(), 0);
+    }
+  }
 
   if (y2 < y1) {
     height = totalNbLines - y1;