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+#include "subway_map.h"
+
+#include <wx/dcbuffer.h>
+#include <wx/dcgraph.h>
+
+#include <sstream>
+
+#include "ap_state.h"
+#include "game_data.h"
+#include "global.h"
+#include "tracker_state.h"
+
+constexpr int AREA_ACTUAL_SIZE = 21;
+constexpr int OWL_ACTUAL_SIZE = 32;
+
+enum class ItemDrawType { kNone, kBox, kOwl };
+
+SubwayMap::SubwayMap(wxWindow *parent) : wxPanel(parent, wxID_ANY) {
+  SetBackgroundStyle(wxBG_STYLE_PAINT);
+
+  map_image_ =
+      wxImage(GetAbsolutePath("assets/subway.png").c_str(), wxBITMAP_TYPE_PNG);
+  if (!map_image_.IsOk()) {
+    return;
+  }
+
+  owl_image_ =
+      wxImage(GetAbsolutePath("assets/owl.png").c_str(), wxBITMAP_TYPE_PNG);
+  if (!owl_image_.IsOk()) {
+    return;
+  }
+
+  unchecked_eye_ =
+      wxBitmap(wxImage(GetAbsolutePath("assets/unchecked.png").c_str(),
+                       wxBITMAP_TYPE_PNG)
+                   .Scale(32, 32));
+  checked_eye_ = wxBitmap(
+      wxImage(GetAbsolutePath("assets/checked.png").c_str(), wxBITMAP_TYPE_PNG)
+          .Scale(32, 32));
+
+  tree_ = std::make_unique<quadtree::Quadtree<int, GetItemBox>>(
+      quadtree::Box<float>{0, 0, static_cast<float>(map_image_.GetWidth()),
+                           static_cast<float>(map_image_.GetHeight())});
+  for (const SubwayItem &subway_item : GD_GetSubwayItems()) {
+    tree_->add(subway_item.id);
+  }
+
+  Redraw();
+
+  scroll_timer_ = new wxTimer(this);
+
+  Bind(wxEVT_PAINT, &SubwayMap::OnPaint, this);
+  Bind(wxEVT_MOTION, &SubwayMap::OnMouseMove, this);
+  Bind(wxEVT_MOUSEWHEEL, &SubwayMap::OnMouseScroll, this);
+  Bind(wxEVT_LEAVE_WINDOW, &SubwayMap::OnMouseLeave, this);
+  Bind(wxEVT_LEFT_DOWN, &SubwayMap::OnMouseClick, this);
+  Bind(wxEVT_TIMER, &SubwayMap::OnTimer, this);
+
+  zoom_slider_ = new wxSlider(this, wxID_ANY, 0, 0, 8, {15, 15});
+  zoom_slider_->Bind(wxEVT_SLIDER, &SubwayMap::OnZoomSlide, this);
+
+  help_button_ = new wxButton(this, wxID_ANY, "Help");
+  help_button_->Bind(wxEVT_BUTTON, &SubwayMap::OnClickHelp, this);
+  SetUpHelpButton();
+}
+
+void SubwayMap::OnConnect() {
+  networks_.Clear();
+
+  std::map<std::string, std::vector<int>> tagged;
+  for (const SubwayItem &subway_item : GD_GetSubwayItems()) {
+    if (AP_HasEarlyColorHallways() &&
+        (subway_item.special == "starting_room_paintings" ||
+         subway_item.special == "early_color_hallways")) {
+      tagged["early_color_hallways"].push_back(subway_item.id);
+    }
+
+    if (AP_IsPaintingShuffle() && !subway_item.paintings.empty()) {
+      continue;
+    }
+
+    for (const std::string &tag : subway_item.tags) {
+      tagged[tag].push_back(subway_item.id);
+    }
+
+    if (!AP_IsSunwarpShuffle() && subway_item.sunwarp &&
+        subway_item.sunwarp->type != SubwaySunwarpType::kFinal) {
+      std::ostringstream tag;
+      tag << "sunwarp" << subway_item.sunwarp->dots;
+
+      tagged[tag.str()].push_back(subway_item.id);
+    }
+
+    if (!AP_IsPilgrimageEnabled() &&
+        (subway_item.special == "sun_painting" ||
+         subway_item.special == "sun_painting_exit")) {
+      tagged["sun_painting"].push_back(subway_item.id);
+    }
+  }
+
+  for (const auto &[tag, items] : tagged) {
+    // Pairwise connect all items with the same tag.
+    for (auto tag_it1 = items.begin(); std::next(tag_it1) != items.end();
+         tag_it1++) {
+      for (auto tag_it2 = std::next(tag_it1); tag_it2 != items.end();
+           tag_it2++) {
+        networks_.AddLink(*tag_it1, *tag_it2);
+      }
+    }
+  }
+
+  checked_paintings_.clear();
+}
+
+void SubwayMap::UpdateIndicators() {
+  if (AP_IsPaintingShuffle()) {
+    for (const std::string &painting_id : AP_GetCheckedPaintings()) {
+      if (!checked_paintings_.count(painting_id)) {
+        checked_paintings_.insert(painting_id);
+
+        if (AP_GetPaintingMapping().count(painting_id)) {
+          networks_.AddLink(GD_GetSubwayItemForPainting(painting_id),
+                            GD_GetSubwayItemForPainting(
+                                AP_GetPaintingMapping().at(painting_id)));
+        }
+      }
+    }
+  }
+
+  Redraw();
+}
+
+void SubwayMap::UpdateSunwarp(SubwaySunwarp from_sunwarp,
+                              SubwaySunwarp to_sunwarp) {
+  networks_.AddLink(GD_GetSubwayItemForSunwarp(from_sunwarp),
+                    GD_GetSubwayItemForSunwarp(to_sunwarp));
+}
+
+void SubwayMap::Zoom(bool in) {
+  wxPoint focus_point;
+
+  if (mouse_position_) {
+    focus_point = *mouse_position_;
+  } else {
+    focus_point = {GetSize().GetWidth() / 2, GetSize().GetHeight() / 2};
+  }
+
+  if (in) {
+    if (zoom_ < 3.0) {
+      SetZoom(zoom_ + 0.25, focus_point);
+    }
+  } else {
+    if (zoom_ > 1.0) {
+      SetZoom(zoom_ - 0.25, focus_point);
+    }
+  }
+}
+
+void SubwayMap::OnPaint(wxPaintEvent &event) {
+  if (GetSize() != rendered_.GetSize()) {
+    wxSize panel_size = GetSize();
+    wxSize image_size = map_image_.GetSize();
+
+    render_x_ = 0;
+    render_y_ = 0;
+    render_width_ = panel_size.GetWidth();
+    render_height_ = panel_size.GetHeight();
+
+    if (image_size.GetWidth() * panel_size.GetHeight() >
+        panel_size.GetWidth() * image_size.GetHeight()) {
+      render_height_ = (panel_size.GetWidth() * image_size.GetHeight()) /
+                       image_size.GetWidth();
+      render_y_ = (panel_size.GetHeight() - render_height_) / 2;
+    } else {
+      render_width_ = (image_size.GetWidth() * panel_size.GetHeight()) /
+                      image_size.GetHeight();
+      render_x_ = (panel_size.GetWidth() - render_width_) / 2;
+    }
+
+    SetZoomPos({zoom_x_, zoom_y_});
+
+    SetUpHelpButton();
+  }
+
+  wxBufferedPaintDC dc(this);
+  dc.SetBackground(*wxWHITE_BRUSH);
+  dc.Clear();
+
+  {
+    wxMemoryDC rendered_dc;
+    rendered_dc.SelectObject(rendered_);
+
+    int dst_x;
+    int dst_y;
+    int dst_w;
+    int dst_h;
+    int src_x;
+    int src_y;
+    int src_w;
+    int src_h;
+
+    int zoomed_width = render_width_ * zoom_;
+    int zoomed_height = render_height_ * zoom_;
+
+    if (zoomed_width <= GetSize().GetWidth()) {
+      dst_x = (GetSize().GetWidth() - zoomed_width) / 2;
+      dst_w = zoomed_width;
+      src_x = 0;
+      src_w = map_image_.GetWidth();
+    } else {
+      dst_x = 0;
+      dst_w = GetSize().GetWidth();
+      src_x = -zoom_x_ * map_image_.GetWidth() / render_width_ / zoom_;
+      src_w =
+          GetSize().GetWidth() * map_image_.GetWidth() / render_width_ / zoom_;
+    }
+
+    if (zoomed_height <= GetSize().GetHeight()) {
+      dst_y = (GetSize().GetHeight() - zoomed_height) / 2;
+      dst_h = zoomed_height;
+      src_y = 0;
+      src_h = map_image_.GetHeight();
+    } else {
+      dst_y = 0;
+      dst_h = GetSize().GetHeight();
+      src_y = -zoom_y_ * map_image_.GetWidth() / render_width_ / zoom_;
+      src_h =
+          GetSize().GetHeight() * map_image_.GetWidth() / render_width_ / zoom_;
+    }
+
+    wxGCDC gcdc(dc);
+    gcdc.GetGraphicsContext()->SetInterpolationQuality(wxINTERPOLATION_GOOD);
+    gcdc.StretchBlit(dst_x, dst_y, dst_w, dst_h, &rendered_dc, src_x, src_y,
+                     src_w, src_h);
+  }
+
+  if (hovered_item_) {
+    // Note that these requirements are duplicated on OnMouseClick so that it
+    // knows when an item has a hover effect.
+    const SubwayItem &subway_item = GD_GetSubwayItem(*hovered_item_);
+    if (subway_item.door && !GetDoorRequirements(*subway_item.door).empty()) {
+      const std::map<std::string, bool> &report =
+          GetDoorRequirements(*subway_item.door);
+
+      int acc_height = 10;
+      int col_width = 0;
+
+      for (const auto &[text, obtained] : report) {
+        wxSize item_extent = dc.GetTextExtent(text);
+        int item_height = std::max(32, item_extent.GetHeight()) + 10;
+        acc_height += item_height;
+
+        if (item_extent.GetWidth() > col_width) {
+          col_width = item_extent.GetWidth();
+        }
+      }
+
+      int item_width = col_width + 10 + 32;
+      int full_width = item_width + 20;
+
+      wxPoint popup_pos =
+          MapPosToRenderPos({subway_item.x + AREA_ACTUAL_SIZE / 2,
+                             subway_item.y + AREA_ACTUAL_SIZE / 2});
+
+      if (popup_pos.x + full_width > GetSize().GetWidth()) {
+        popup_pos.x = GetSize().GetWidth() - full_width;
+      }
+      if (popup_pos.y + acc_height > GetSize().GetHeight()) {
+        popup_pos.y = GetSize().GetHeight() - acc_height;
+      }
+
+      dc.SetPen(*wxTRANSPARENT_PEN);
+      dc.SetBrush(*wxBLACK_BRUSH);
+      dc.DrawRectangle(popup_pos, {full_width, acc_height});
+
+      dc.SetFont(GetFont());
+
+      int cur_height = 10;
+
+      for (const auto &[text, obtained] : report) {
+        wxBitmap *eye_ptr = obtained ? &checked_eye_ : &unchecked_eye_;
+
+        dc.DrawBitmap(*eye_ptr, popup_pos + wxPoint{10, cur_height});
+
+        dc.SetTextForeground(obtained ? *wxWHITE : *wxRED);
+        wxSize item_extent = dc.GetTextExtent(text);
+        dc.DrawText(
+            text,
+            popup_pos +
+                wxPoint{10 + 32 + 10,
+                        cur_height + (32 - dc.GetFontMetrics().height) / 2});
+
+        cur_height += 10 + 32;
+      }
+    }
+
+    if (networks_.IsItemInNetwork(*hovered_item_)) {
+      dc.SetBrush(*wxTRANSPARENT_BRUSH);
+
+      for (const auto &[item_id1, item_id2] :
+           networks_.GetNetworkGraph(*hovered_item_)) {
+        const SubwayItem &item1 = GD_GetSubwayItem(item_id1);
+        const SubwayItem &item2 = GD_GetSubwayItem(item_id2);
+
+        wxPoint item1_pos = MapPosToRenderPos(
+            {item1.x + AREA_ACTUAL_SIZE / 2, item1.y + AREA_ACTUAL_SIZE / 2});
+        wxPoint item2_pos = MapPosToRenderPos(
+            {item2.x + AREA_ACTUAL_SIZE / 2, item2.y + AREA_ACTUAL_SIZE / 2});
+
+        int left = std::min(item1_pos.x, item2_pos.x);
+        int top = std::min(item1_pos.y, item2_pos.y);
+        int right = std::max(item1_pos.x, item2_pos.x);
+        int bottom = std::max(item1_pos.y, item2_pos.y);
+
+        int halfwidth = right - left;
+        int halfheight = bottom - top;
+
+        if (halfwidth < 4 || halfheight < 4) {
+          dc.SetPen(*wxThePenList->FindOrCreatePen(*wxBLACK, 4));
+          dc.DrawLine(item1_pos, item2_pos);
+          dc.SetPen(*wxThePenList->FindOrCreatePen(*wxCYAN, 2));
+          dc.DrawLine(item1_pos, item2_pos);
+        } else {
+          int ellipse_x;
+          int ellipse_y;
+          double start;
+          double end;
+
+          if (item1_pos.x > item2_pos.x) {
+            ellipse_y = top;
+
+            if (item1_pos.y > item2_pos.y) {
+              ellipse_x = left - halfwidth;
+
+              start = 0;
+              end = 90;
+            } else {
+              ellipse_x = left;
+
+              start = 90;
+              end = 180;
+            }
+          } else {
+            ellipse_y = top - halfheight;
+
+            if (item1_pos.y > item2_pos.y) {
+              ellipse_x = left - halfwidth;
+
+              start = 270;
+              end = 360;
+            } else {
+              ellipse_x = left;
+
+              start = 180;
+              end = 270;
+            }
+          }
+
+          dc.SetPen(*wxThePenList->FindOrCreatePen(*wxBLACK, 4));
+          dc.DrawEllipticArc(ellipse_x, ellipse_y, halfwidth * 2,
+                             halfheight * 2, start, end);
+          dc.SetPen(*wxThePenList->FindOrCreatePen(*wxCYAN, 2));
+          dc.DrawEllipticArc(ellipse_x, ellipse_y, halfwidth * 2,
+                             halfheight * 2, start, end);
+        }
+      }
+    }
+  }
+
+  event.Skip();
+}
+
+void SubwayMap::OnMouseMove(wxMouseEvent &event) {
+  wxPoint mouse_pos = RenderPosToMapPos(event.GetPosition());
+
+  std::vector<int> hovered = tree_->query(
+      {static_cast<float>(mouse_pos.x), static_cast<float>(mouse_pos.y), 2, 2});
+  if (!hovered.empty()) {
+    actual_hover_= hovered[0];
+  } else {
+    actual_hover_ = std::nullopt;
+  }
+
+  if (!sticky_hover_ && actual_hover_ != hovered_item_) {
+    hovered_item_ = actual_hover_;
+
+    Refresh();
+  }
+
+  if (scroll_mode_) {
+    EvaluateScroll(event.GetPosition());
+  }
+
+  mouse_position_ = event.GetPosition();
+
+  event.Skip();
+}
+
+void SubwayMap::OnMouseScroll(wxMouseEvent &event) {
+  double new_zoom = zoom_;
+  if (event.GetWheelRotation() > 0) {
+    new_zoom = std::min(3.0, zoom_ + 0.25);
+  } else {
+    new_zoom = std::max(1.0, zoom_ - 0.25);
+  }
+
+  if (zoom_ != new_zoom) {
+    SetZoom(new_zoom, event.GetPosition());
+  }
+
+  event.Skip();
+}
+
+void SubwayMap::OnMouseLeave(wxMouseEvent &event) {
+  SetScrollSpeed(0, 0);
+  mouse_position_ = std::nullopt;
+}
+
+void SubwayMap::OnMouseClick(wxMouseEvent &event) {
+  bool finished = false;
+
+  if (actual_hover_) {
+    const SubwayItem &subway_item = GD_GetSubwayItem(*actual_hover_);
+    if ((subway_item.door && !GetDoorRequirements(*subway_item.door).empty()) ||
+        networks_.IsItemInNetwork(*hovered_item_)) {
+      if (actual_hover_ != hovered_item_) {
+        hovered_item_ = actual_hover_;
+
+        if (!hovered_item_) {
+          sticky_hover_ = false;
+        }
+
+        Refresh();
+      } else {
+        sticky_hover_ = !sticky_hover_;
+      }
+
+      finished = true;
+    }
+  }
+
+  if (!finished) {
+    if (scroll_mode_) {
+      scroll_mode_ = false;
+
+      SetScrollSpeed(0, 0);
+
+      SetCursor(wxCURSOR_ARROW);
+    } else if (event.GetPosition().x < GetSize().GetWidth() / 6 ||
+               event.GetPosition().x > 5 * GetSize().GetWidth() / 6 ||
+               event.GetPosition().y < GetSize().GetHeight() / 6 ||
+               event.GetPosition().y > 5 * GetSize().GetHeight() / 6) {
+      scroll_mode_ = true;
+
+      EvaluateScroll(event.GetPosition());
+
+      SetCursor(wxCURSOR_CROSS);
+    } else {
+      sticky_hover_ = false;
+    }
+  }
+}
+
+void SubwayMap::OnTimer(wxTimerEvent &event) {
+  SetZoomPos({zoom_x_ + scroll_x_, zoom_y_ + scroll_y_});
+  Refresh();
+}
+
+void SubwayMap::OnZoomSlide(wxCommandEvent &event) {
+  double new_zoom = 1.0 + 0.25 * zoom_slider_->GetValue();
+
+  if (new_zoom != zoom_) {
+    SetZoom(new_zoom, {GetSize().GetWidth() / 2, GetSize().GetHeight() / 2});
+  }
+}
+
+void SubwayMap::OnClickHelp(wxCommandEvent &event) {
+  wxMessageBox(
+      "Zoom in/out using the mouse wheel, Ctrl +/-, or the slider in the "
+      "corner.\nClick on a side of the screen to start panning. It will follow "
+      "your mouse. Click again to stop.\nHover over a door to see the "
+      "requirements to open it.\nHover over a warp or active painting to see "
+      "what it is connected to.\nIn painting shuffle, paintings that have not "
+      "yet been checked will not show their connections.\nA green shaded owl "
+      "means that there is a painting entrance there.\nA red shaded owl means "
+      "that there are only painting exits there.\nClick on a door or "
+      "warp to make the popup stick until you click again.",
+      "Subway Map Help");
+}
+
+void SubwayMap::Redraw() {
+  rendered_ = wxBitmap(map_image_);
+
+  wxMemoryDC dc;
+  dc.SelectObject(rendered_);
+
+  wxGCDC gcdc(dc);
+
+  for (const SubwayItem &subway_item : GD_GetSubwayItems()) {
+    ItemDrawType draw_type = ItemDrawType::kNone;
+    const wxBrush *brush_color = wxGREY_BRUSH;
+    std::optional<wxColour> shade_color;
+
+    if (AP_HasEarlyColorHallways() &&
+        (subway_item.special == "starting_room_paintings" ||
+         subway_item.special == "early_color_hallways")) {
+      draw_type = ItemDrawType::kOwl;
+
+      if (subway_item.special == "starting_room_paintings") {
+        shade_color = wxColour(0, 255, 0, 128);
+      } else {
+        shade_color = wxColour(255, 0, 0, 128);
+      }
+    } else if (subway_item.special == "sun_painting") {
+      if (!AP_IsPilgrimageEnabled()) {
+        if (IsDoorOpen(*subway_item.door)) {
+          draw_type = ItemDrawType::kOwl;
+          shade_color = wxColour(0, 255, 0, 128);
+        } else {
+          draw_type = ItemDrawType::kBox;
+          brush_color = wxRED_BRUSH;
+        }
+      }
+    } else if (!subway_item.paintings.empty()) {
+      if (AP_IsPaintingShuffle()) {
+        bool has_checked_painting = false;
+        bool has_unchecked_painting = false;
+        bool has_mapped_painting = false;
+        bool has_codomain_painting = false;
+
+        for (const std::string &painting_id : subway_item.paintings) {
+          if (checked_paintings_.count(painting_id)) {
+            has_checked_painting = true;
+
+            if (AP_GetPaintingMapping().count(painting_id)) {
+              has_mapped_painting = true;
+            } else if (AP_IsPaintingMappedTo(painting_id)) {
+              has_codomain_painting = true;
+            }
+          } else {
+            has_unchecked_painting = true;
+          }
+        }
+
+        if (has_unchecked_painting || has_mapped_painting || has_codomain_painting) {
+          draw_type = ItemDrawType::kOwl;
+
+          if (has_checked_painting) {
+            if (has_mapped_painting) {
+              shade_color = wxColour(0, 255, 0, 128);
+            } else {
+              shade_color = wxColour(255, 0, 0, 128);
+            }
+          }
+        }
+      } else if (!subway_item.tags.empty()) {
+        draw_type = ItemDrawType::kOwl;
+      }
+    } else if (subway_item.door) {
+      draw_type = ItemDrawType::kBox;
+
+      if (IsDoorOpen(*subway_item.door)) {
+        brush_color = wxGREEN_BRUSH;
+      } else {
+        brush_color = wxRED_BRUSH;
+      }
+    }
+
+    wxPoint real_area_pos = {subway_item.x, subway_item.y};
+
+    int real_area_size =
+        (draw_type == ItemDrawType::kOwl ? OWL_ACTUAL_SIZE : AREA_ACTUAL_SIZE);
+
+    if (draw_type == ItemDrawType::kBox) {
+      gcdc.SetPen(*wxThePenList->FindOrCreatePen(*wxBLACK, 1));
+      gcdc.SetBrush(*brush_color);
+      gcdc.DrawRectangle(real_area_pos, {real_area_size, real_area_size});
+    } else if (draw_type == ItemDrawType::kOwl) {
+      wxBitmap owl_bitmap = wxBitmap(owl_image_.Scale(
+          real_area_size, real_area_size, wxIMAGE_QUALITY_BILINEAR));
+      gcdc.DrawBitmap(owl_bitmap, real_area_pos);
+
+      if (shade_color) {
+        gcdc.SetBrush(wxBrush(*shade_color));
+        gcdc.DrawRectangle(real_area_pos, {real_area_size, real_area_size});
+      }
+    }
+  }
+}
+
+void SubwayMap::SetUpHelpButton() {
+  help_button_->SetPosition({
+      GetSize().GetWidth() - help_button_->GetSize().GetWidth() - 15,
+      15,
+  });
+}
+
+void SubwayMap::EvaluateScroll(wxPoint pos) {
+  int scroll_x;
+  int scroll_y;
+  if (pos.x < GetSize().GetWidth() / 9) {
+    scroll_x = 20;
+  } else if (pos.x < GetSize().GetWidth() / 6) {
+    scroll_x = 5;
+  } else if (pos.x > 8 * GetSize().GetWidth() / 9) {
+    scroll_x = -20;
+  } else if (pos.x > 5 * GetSize().GetWidth() / 6) {
+    scroll_x = -5;
+  } else {
+    scroll_x = 0;
+  }
+  if (pos.y < GetSize().GetHeight() / 9) {
+    scroll_y = 20;
+  } else if (pos.y < GetSize().GetHeight() / 6) {
+    scroll_y = 5;
+  } else if (pos.y > 8 * GetSize().GetHeight() / 9) {
+    scroll_y = -20;
+  } else if (pos.y > 5 * GetSize().GetHeight() / 6) {
+    scroll_y = -5;
+  } else {
+    scroll_y = 0;
+  }
+
+  SetScrollSpeed(scroll_x, scroll_y);
+}
+
+wxPoint SubwayMap::MapPosToRenderPos(wxPoint pos) const {
+  return {static_cast<int>(pos.x * render_width_ * zoom_ /
+                               map_image_.GetSize().GetWidth() +
+                           zoom_x_),
+          static_cast<int>(pos.y * render_width_ * zoom_ /
+                               map_image_.GetSize().GetWidth() +
+                           zoom_y_)};
+}
+
+wxPoint SubwayMap::MapPosToVirtualPos(wxPoint pos) const {
+  return {static_cast<int>(pos.x * render_width_ * zoom_ /
+                           map_image_.GetSize().GetWidth()),
+          static_cast<int>(pos.y * render_width_ * zoom_ /
+                           map_image_.GetSize().GetWidth())};
+}
+
+wxPoint SubwayMap::RenderPosToMapPos(wxPoint pos) const {
+  return {
+      std::clamp(static_cast<int>((pos.x - zoom_x_) * map_image_.GetWidth() /
+                                  render_width_ / zoom_),
+                 0, map_image_.GetWidth() - 1),
+      std::clamp(static_cast<int>((pos.y - zoom_y_) * map_image_.GetWidth() /
+                                  render_width_ / zoom_),
+                 0, map_image_.GetHeight() - 1)};
+}
+
+void SubwayMap::SetZoomPos(wxPoint pos) {
+  if (render_width_ * zoom_ <= GetSize().GetWidth()) {
+    zoom_x_ = (GetSize().GetWidth() - render_width_ * zoom_) / 2;
+  } else {
+    zoom_x_ = std::clamp(
+        pos.x, GetSize().GetWidth() - static_cast<int>(render_width_ * zoom_),
+        0);
+  }
+  if (render_height_ * zoom_ <= GetSize().GetHeight()) {
+    zoom_y_ = (GetSize().GetHeight() - render_height_ * zoom_) / 2;
+  } else {
+    zoom_y_ = std::clamp(
+        pos.y, GetSize().GetHeight() - static_cast<int>(render_height_ * zoom_),
+        0);
+  }
+}
+
+void SubwayMap::SetScrollSpeed(int scroll_x, int scroll_y) {
+  bool should_timer = (scroll_x != 0 || scroll_y != 0);
+  if (should_timer != scroll_timer_->IsRunning()) {
+    if (should_timer) {
+      scroll_timer_->Start(1000 / 60);
+    } else {
+      scroll_timer_->Stop();
+    }
+  }
+
+  scroll_x_ = scroll_x;
+  scroll_y_ = scroll_y;
+}
+
+void SubwayMap::SetZoom(double zoom, wxPoint static_point) {
+  wxPoint map_pos = RenderPosToMapPos(static_point);
+  zoom_ = zoom;
+
+  wxPoint virtual_pos = MapPosToVirtualPos(map_pos);
+  SetZoomPos(-(virtual_pos - static_point));
+
+  Refresh();
+
+  zoom_slider_->SetValue((zoom - 1.0) / 0.25);
+}
+
+quadtree::Box<float> SubwayMap::GetItemBox::operator()(const int &id) const {
+  const SubwayItem &subway_item = GD_GetSubwayItem(id);
+  return {static_cast<float>(subway_item.x), static_cast<float>(subway_item.y),
+          AREA_ACTUAL_SIZE, AREA_ACTUAL_SIZE};
+}