rename engine to src

src/node_scroll.cpp

@@ -0,0 +1,69 @@
+#include "pch.h"
+#include "log.h"
+#include "node_scroll.h"
+#include "event.h"
+
+Node* NodeScroll::clone_instantiate() const
+{
+    return new NodeScroll;
+}
+
+void NodeScroll::fix_scroll()
+{
+    auto pad = GetPadding();
+    glm::vec2 padoff = { pad.y + pad.w, pad.x + pad.z };
+    auto rect = get_children_rect();
+    m_offset = glm::clamp(m_offset, - zw(rect) + zw(m_clip_uncut) - padoff, { 0, 0 });
+    m_pos_offset_childred = m_offset;
+}
+
+kEventResult NodeScroll::handle_event(Event* e)
+{
+    NodeBorder::handle_event(e);
+    auto me = static_cast<MouseEvent*>(e);
+    auto ge = static_cast<GestureEvent*>(e);
+    auto loc = (me->m_pos - m_pos) * root()->m_zoom;
+    switch (e->m_type)
+    {
+    case kEventType::MouseDownL:
+        m_dragging = true;
+        m_drag_start = me->m_pos;
+        m_offset_start = m_offset;
+        mouse_capture();
+        break;
+    case kEventType::MouseMove:
+        if (m_dragging)
+        {
+            m_offset = m_offset_start + (me->m_pos - m_drag_start) * m_mask;
+            fix_scroll();
+        }
+        break;
+    case kEventType::MouseUpL:
+        mouse_release();
+        m_dragging = false;
+        break;
+     case kEventType::MouseScroll:
+        m_offset += me->m_scroll_delta * 50;
+        fix_scroll();
+        break;
+    case kEventType::GestureStart:
+        m_offset_start = m_offset;
+        mouse_capture();
+        break;
+    case kEventType::GestureMove:
+        m_offset = m_offset_start + ge->m_pos_delta * m_mask;
+        fix_scroll();
+        break;
+    case kEventType::GestureEnd:
+        mouse_release();
+        break;
+    case kEventType::MouseCancel:
+        mouse_release();
+        m_dragging = false;
+        break;
+    default:
+        return kEventResult::Available;
+        break;
+    }
+    return kEventResult::Consumed;
+}