move and fix scrolling to layout

Scrolling was hardcoded to 3ds sCrEeNhEiGhT wTh

source/ui7/menu.cpp

@@ -147,45 +147,6 @@ PD_API void Menu::HandleFocus() {
   }
 }
 
-/** Todo: (func name is self describing) */
-PD_API void Menu::HandleScrolling() {
-  if (Flags & UI7MenuFlags_VtScrolling) {
-    bool allowed =
-        pLayout.MaxPosition.y > (pLayout.WorkRect.w - pLayout.WorkRect.y);
-    if (allowed) {
-      if (PD::Hid::IsEvent(Hid::Event::Down, PD::Hid::Gamepad::Touch)) {
-        pLayout.ScrollStart = pLayout.ScrollOffset;
-      }
-      if (pIO.InputHandler.DragObject(
-              "sbg" + pID.GetName(),
-              fvec4(pLayout.Pos, fvec2(0.f)) + pLayout.WorkRect)) {
-        if (pIO.InputHandler.DragReleasedAW) {
-        } else {
-          pLayout.ScrollOffset.y = std::clamp(
-              pLayout.ScrollStart.y + pIO.InputHandler.DragSourcePos.y -
-                  pIO.InputHandler.DragPosition.y,
-              -20.f, pLayout.MaxPosition.y - 220);
-        }
-      }
-    } else {
-      pLayout.ScrollOffset.y = 0.f;
-    }
-
-    if (pLayout.ScrollOffset.y > pLayout.MaxPosition.y - 240) {
-      pLayout.ScrollOffset.y -= 1.5;
-      if (pLayout.ScrollOffset.y < pLayout.MaxPosition.y - 240) {
-        pLayout.ScrollOffset.y = pLayout.MaxPosition.y - 240;
-      }
-    }
-    if (pLayout.ScrollOffset.y < 0) {
-      pLayout.ScrollOffset.y += 1.5;
-      if (pLayout.ScrollOffset.y > 0) {
-        pLayout.ScrollOffset.y = 0;
-      }
-    }
-  }
-}
-
 PD_API void Menu::HandleTitlebarActions() {
   // Collapse
   if (!(Flags & UI7MenuFlags_NoCollapse)) {
@@ -358,6 +319,10 @@ PD_API void Menu::Update() {
   if (pLayout.Size == fvec2(0.f) || Flags & UI7MenuFlags_AlwaysAutoSize) {
     pLayout.Size = fvec2(pLayout.MaxPosition) + pIO.MenuPadding * 2;
   }
+  if (Flags & UI7MenuFlags_VtScrolling)
+    pLayout.Flags |= UI7LayoutFlags_VtScrolling;
+  if (Flags & UI7MenuFlags_HzScrolling)
+    pLayout.Flags |= UI7LayoutFlags_HzScrolling;
   if (!(Flags & UI7MenuFlags_NoTitlebar)) {
     TitleBarHeight = pIO.FontScale * pIO.Font->PixelHeight + pIO.MenuPadding.y;
     pLayout.WorkRect.y = 5.f + TitleBarHeight;
@@ -368,9 +333,6 @@ PD_API void Menu::Update() {
   }
   DrawBaseLayout();
   pLayout.Update();
-  if (Flags & UI7MenuFlags_VtScrolling || Flags & UI7MenuFlags_HzScrolling) {
-    HandleScrolling();
-  }
 }
 
 PD_API bool Menu::BeginTreeNode(const ID& id) {