diff --git a/tycho/CMakeLists.txt b/tycho/CMakeLists.txt
index 3eb2249..210bdd6 100644
--- a/tycho/CMakeLists.txt
+++ b/tycho/CMakeLists.txt
@@ -9,6 +9,7 @@ set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)
 set(CMAKE_AUTOUIC ON)
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Werror")
 
 find_package(
    Qt5 5.6.0
@@ -22,11 +23,14 @@ add_library(
    SHARED
    $ENV{OUT_DIR}/bindings.cc
    $ENV{OUT_DIR}/bindings.h
+   cc_headers/mapmodel.h
    cc_headers/mapprops.h
    cc_headers/menu.h
    cc_headers/project.h
    cc_headers/tycho.h
+   cc_source/cc.cc
    cc_source/main.cc
+   cc_source/mapmodel.cc
    cc_source/mapprops.cc
    cc_source/menu.cc
    cc_source/project.cc
@@ -60,6 +64,14 @@ target_link_libraries(
    Qt5::Widgets
 )
 
+target_compile_definitions(
+   maraiah-tycho-hermes
+   PUBLIC
+      -DQT_DEPRECATED_WARNINGS
+      -DQT_STRICT_ITERATORS
+      -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT
+)
+
 install(TARGETS maraiah-tycho-hermes)
 
 ## EOF
diff --git a/tycho/bindings.json b/tycho/bindings.json
index dd1f0cb..3c3b1a3 100644
--- a/tycho/bindings.json
+++ b/tycho/bindings.json
@@ -6,8 +6,8 @@
       "implementationModule": "gui"
    },
    "objects": {
-      "MapModel": {
-         "type": "Tree",
+      "AbstractMapModel": {
+         "type": "List",
          "functions": {
             "open": {
                "return": "bool",
@@ -32,18 +32,22 @@
             "isDirty": {
                "return": "bool",
                "mut": false
+            },
+            "propIcon": {
+               "return": "QString",
+               "mut": false,
+               "arguments": [{
+                  "name": "index",
+                  "type": "quint16"
+               }]
             }
          },
          "properties": {
          },
          "itemProperties": {
-            "rowName": {
+            "propIndex": {
                "type": "quint64",
                "roles": [["display"]]
-            },
-            "someNumber": {
-               "type": "quint64",
-               "roles": [[], ["display"]]
             }
          }
       }
diff --git a/tycho/cc_headers/mapmodel.h b/tycho/cc_headers/mapmodel.h
new file mode 100644
index 0000000..acb5a67
--- /dev/null
+++ b/tycho/cc_headers/mapmodel.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include "bindings.h"
+
+class MapModel : public AbstractMapModel
+{
+   Q_OBJECT
+
+public:
+   explicit MapModel(QObject *parent = nullptr);
+   ~MapModel();
+
+   QVariant data(const QModelIndex &index, int role = Qt::DisplayRole)
+      const override;
+};
+
+// EOF
diff --git a/tycho/cc_headers/menu.h b/tycho/cc_headers/menu.h
index e6d7c55..e3cad69 100644
--- a/tycho/cc_headers/menu.h
+++ b/tycho/cc_headers/menu.h
@@ -19,6 +19,7 @@ public slots:
    void mapNew();
    void mapOpen();
    void openAbout();
+   void openAboutQt();
    void openMapProperties();
    void updateActions();
 
diff --git a/tycho/cc_headers/project.h b/tycho/cc_headers/project.h
index 7eed791..6c3d97a 100644
--- a/tycho/cc_headers/project.h
+++ b/tycho/cc_headers/project.h
@@ -4,6 +4,8 @@
 
 #include "../ui/ui_project.h"
 
+class MapModel;
+
 class ProjectModel
 {
 public:
diff --git a/tycho/cc_source/cc.cc b/tycho/cc_source/cc.cc
new file mode 100644
index 0000000..ec81f56
--- /dev/null
+++ b/tycho/cc_source/cc.cc
@@ -0,0 +1,10 @@
+#include "tycho.h"
+#include <QMessageBox>
+
+extern "C" {
+   void critical_msg(char const *title, char const *msg) {
+      QMessageBox::critical(nullptr, QObject::tr(title), QObject::tr(msg));
+   }
+}
+
+// EOF
diff --git a/tycho/cc_source/mapmodel.cc b/tycho/cc_source/mapmodel.cc
new file mode 100644
index 0000000..e944cd6
--- /dev/null
+++ b/tycho/cc_source/mapmodel.cc
@@ -0,0 +1,28 @@
+#include "tycho.h"
+#include "mapmodel.h"
+
+#include <QIcon>
+
+MapModel::MapModel(QObject *parent) :
+   AbstractMapModel(parent)
+{
+}
+
+MapModel::~MapModel()
+{
+}
+
+QVariant MapModel::data(const QModelIndex &index, int role) const
+{
+   switch(role) {
+      case Qt::DecorationRole: {
+         auto name = propIcon(index.row());
+         auto icon = name.front() == ':' ? QIcon(name) : QIcon::fromTheme(name);
+         return QVariant::fromValue(icon);
+      }
+      default:
+         return AbstractMapModel::data(index, role);
+   }
+}
+
+// EOF
diff --git a/tycho/cc_source/menu.cc b/tycho/cc_source/menu.cc
index 4611dba..c6be78e 100644
--- a/tycho/cc_source/menu.cc
+++ b/tycho/cc_source/menu.cc
@@ -2,12 +2,14 @@
 #include "mapprops.h"
 #include "menu.h"
 #include "project.h"
+#include "mapmodel.h"
 #include "../ui/ui_about.h"
 #include "../ui/ui_license.h"
 
 #include <QCloseEvent>
 #include <QFileDialog>
 #include <QMdiSubWindow>
+#include <QMessageBox>
 #include <iostream>
 
 Menu::Menu(QWidget *parent) :
@@ -44,12 +46,17 @@ void Menu::mapOpen()
          this,
          tr("Open Map File"),
          QString(),
-         tr("Marathon Map files (*.scen *.sceA Map)"));
+         tr("Marathon Map files (*.scen *.sceA Map);;"
+            "Marathon Physics files (*.phys *.phyA Physics);;"
+            "Aleph One Image files (*.imgA);;"
+            "All files (*)"));
 
-   QScopedPointer proj{new Project(new MapModel)};
+   if(!fname.isEmpty()) {
+      QScopedPointer proj{new Project(new MapModel)};
 
-   if(proj->model.open(fname)) {
-      addProject(proj.take());
+      if(proj->model.open(fname)) {
+         addProject(proj.take());
+      }
    }
 }
 
@@ -77,6 +84,11 @@ void Menu::openAbout()
    dlg.exec();
 }
 
+void Menu::openAboutQt()
+{
+   QMessageBox::aboutQt(this);
+}
+
 void Menu::openLicense(QWidget *parent)
 {
    QDialog     dlg{parent};
diff --git a/tycho/cc_source/project.cc b/tycho/cc_source/project.cc
index 1068140..2a86dd6 100644
--- a/tycho/cc_source/project.cc
+++ b/tycho/cc_source/project.cc
@@ -1,5 +1,6 @@
 #include "tycho.h"
 #include "project.h"
+#include "mapmodel.h"
 
 #include <QCloseEvent>
 #include <QMessageBox>
@@ -22,6 +23,7 @@ ProjectModel::~ProjectModel()
 {
    switch(modelType) {
       case Map: delete modelMap; break;
+      case Invalid: break;
    }
 }
 
@@ -34,8 +36,8 @@ QAbstractItemModel *ProjectModel::getAbstract() const
 {
    switch(modelType) {
       case Map: return modelMap;
+      case Invalid: Q_UNREACHABLE();
    }
-   Q_UNREACHABLE();
 }
 
 MapModel *ProjectModel::getMap() const
@@ -47,6 +49,7 @@ bool ProjectModel::isDirty() const
 {
    switch(modelType) {
       case Map: return modelMap->isDirty();
+      case Invalid: Q_UNREACHABLE();
    }
    Q_UNREACHABLE();
 }
@@ -55,6 +58,7 @@ bool ProjectModel::open(QString const &path)
 {
    switch(modelType) {
       case Map: return modelMap->open(path);
+      case Invalid: Q_UNREACHABLE();
    }
    Q_UNREACHABLE();
 }
@@ -63,6 +67,7 @@ bool ProjectModel::saveAs(QString const &path) const
 {
    switch(modelType) {
       case Map: return modelMap->saveAs(path);
+      case Invalid: Q_UNREACHABLE();
    }
    Q_UNREACHABLE();
 }
@@ -71,6 +76,7 @@ bool ProjectModel::save() const
 {
    switch(modelType) {
       case Map: return modelMap->save();
+      case Invalid: Q_UNREACHABLE();
    }
    Q_UNREACHABLE();
 }
@@ -86,7 +92,7 @@ Project::Project(ProjectModel &&_model, QWidget *parent) :
    setWidget(widget);
    setAttribute(Qt::WA_DeleteOnClose);
 
-   treeView->setModel(model.getAbstract());
+   listView->setModel(model.getAbstract());
 
    dbgPrintFunc();
 }
@@ -117,8 +123,7 @@ void Project::closeEvent(QCloseEvent *event)
             event->ignore();
             return;
          default:
-            assert(true);
-            break;
+            Q_UNREACHABLE();
       }
    }
 
diff --git a/tycho/source/cc.rs b/tycho/source/cc.rs
new file mode 100644
index 0000000..d4811d2
--- /dev/null
+++ b/tycho/source/cc.rs
@@ -0,0 +1,21 @@
+//! C++ functions.
+
+mod ffi {
+   extern "C" {
+      pub fn critical_msg(title: maraiah::ffi::NT, msg: maraiah::ffi::NT);
+   }
+}
+
+pub fn critical_msg<T, U>(title: T, msg: U)
+   where T: ToString,
+         U: ToString
+{
+   let title = std::ffi::CString::new(title.to_string()).unwrap();
+   let msg   = std::ffi::CString::new(msg.to_string()).unwrap();
+
+   unsafe {
+      ffi::critical_msg(title.as_ptr(), msg.as_ptr());
+   }
+}
+
+// EOF
diff --git a/tycho/source/gui.rs b/tycho/source/gui.rs
index 7ba0178..d616258 100644
--- a/tycho/source/gui.rs
+++ b/tycho/source/gui.rs
@@ -1,8 +1,8 @@
 //! GUI implementation.
 
-mod ffi;
 mod map;
+mod qobj;
 
-pub use self::map::MapModel;
+pub use self::map::AbstractMapModel;
 
 // EOF
diff --git a/tycho/source/gui/map.rs b/tycho/source/gui/map.rs
index cb18c0c..a283615 100644
--- a/tycho/source/gui/map.rs
+++ b/tycho/source/gui/map.rs
@@ -1,69 +1,63 @@
 //! Map model.
 
-use super::ffi::*;
-use maraiah::map;
-use memmap::Mmap;
+use super::qobj::*;
+use maraiah::{backtrace, err::*, map::{self, data::*}};
+use crate::cc;
 
-fn open_f(path: String) -> ResultS<map::Map>
+impl AbstractMapModel
 {
-   let fp = std::fs::File::open(path)?;
-   let mm = unsafe { Mmap::map(&fp) }?;
+   pub fn open_map(path: String) -> ResultS<EntryDataMap>
+   {
+      let mut fp = maraiah::file::open_mac(path)?;
 
-   map::read(&mm)
+      let map = map::head::read(&mut fp)?;
+      let ent = map::entr::read_all(&map)?;
+
+      map::data::read_all(map.head(), &ent)
+   }
+
+   pub fn get(&self, index: usize) -> (&u16, &EntryData)
+   {
+      self.map.iter().nth(index).unwrap()
+   }
+
+   /*
+   pub fn get_mut(&mut self, index: usize) -> (&u16, &mut EntryData)
+   {
+      self.map.iter_mut().nth(index).unwrap()
+   }
+   */
 }
 
-impl MapModelTrait for MapModel
+impl AbstractMapModelTrait for AbstractMapModel
 {
-   /// Returns a new `MapModel` instance.
-   fn new(emit: MapModelEmitter, model: MapModelTree) -> Self
+   /// Returns a new `AbstractMapModel` instance.
+   fn new(emit: AbstractMapModelEmitter, _: AbstractMapModelList) -> Self
    {
       if cfg!(debug_assertions) {
-         eprintln!("new MapModel");
+         eprintln!("new AbstractMapModel");
       }
 
-      Self { emit,
-             model,
-             map: map::Map::default() }
+      Self{emit, map: EntryDataMap::default()}
    }
 
    /// Returns the emitter of `self`.
-   fn emit(&mut self) -> &mut MapModelEmitter { &mut self.emit }
+   fn emit(&mut self) -> &mut AbstractMapModelEmitter {&mut self.emit}
 
-   /// Checks if `row` exists in the leaf `index`.
-   fn check_row(&self, index: usize, _row: usize) -> Option<usize> { None }
+   fn row_count(&self) -> usize {self.map.len()}
 
-   /// Returns the row `index` is in.
-   fn row(&self, index: usize) -> usize { index }
+   fn prop_index(&self, index: usize) -> u64 {(*self.get(index).0).into()}
 
-   /// Returns the number of rows in `index`.
-   fn row_count(&self, index: Option<usize>) -> usize
+   fn prop_icon(&self, index: u16) -> String
    {
-      match index {
-         Some(_) => 0,
-         None => 7,
+      match self.get(index.into()).1.get_type() {
+         EntryType::Image   => "image-x-generic".to_string(),
+         EntryType::Map     => ":/tycho/color/map.png".to_string(),
+         EntryType::Other   => "image-missing".to_string(),
+         EntryType::Physics => "applications-system".to_string(),
       }
    }
 
-   /// Returns the leaf index of `row` in the leaf `index`.
-   fn index(&self, index: Option<usize>, row: usize) -> usize
-   {
-      match index {
-         Some(_) => unreachable!(),
-         None => row,
-      }
-   }
-
-   /// Returns the parent index of the leaf `index`, if any.
-   fn parent(&self, _index: usize) -> Option<usize>
-   {
-      // no parents!
-      None
-   }
-
-   fn row_name(&self, row: usize) -> u64 { row as u64 + 1 }
-
-   fn some_number(&self, row: usize) -> u64 { 69420 }
-
    /// Opens the map file at `path`.
    fn open(&mut self, path: String) -> bool
    {
@@ -71,11 +65,16 @@ impl MapModelTrait for MapModel
          eprintln!("opening project: {}", &path);
       }
 
-      if let Ok(map) = open_f(&mm) {
-         self.map = map;
-         true
-      } else {
-         false
+      match Self::open_map(path) {
+         Ok(map) => {
+            self.map = map;
+            true
+         }
+         Err(e) => {
+            backtrace!(e);
+            cc::critical_msg("Error opening map", e);
+            false
+         }
       }
    }
 
@@ -100,24 +99,22 @@ impl MapModelTrait for MapModel
    }
 
    /// Returns `true` if the file has been modified from its original state.
-   fn is_dirty(&self) -> bool { false }
+   fn is_dirty(&self) -> bool {false}
 }
 
-impl Drop for MapModel
+impl Drop for AbstractMapModel
 {
    fn drop(&mut self)
    {
       if cfg!(debug_assertions) {
-         eprintln!("drop MapModel");
+         eprintln!("drop AbstractMapModel");
       }
    }
 }
 
-pub struct MapModel
-{
-   emit:  MapModelEmitter,
-   model: MapModelTree,
-   map:   map::Map,
+pub struct AbstractMapModel {
+   emit: AbstractMapModelEmitter,
+   map:  EntryDataMap,
 }
 
 // EOF
diff --git a/tycho/source/gui/ffi.rs b/tycho/source/gui/qobj.rs
similarity index 100%
rename from tycho/source/gui/ffi.rs
rename to tycho/source/gui/qobj.rs
diff --git a/tycho/source/main.rs b/tycho/source/main.rs
index 79dbf54..e2d6820 100644
--- a/tycho/source/main.rs
+++ b/tycho/source/main.rs
@@ -1,5 +1,6 @@
 use maraiah::{err::*, ffi};
 
+mod cc;
 mod gui;
 mod meta;
 
diff --git a/tycho/ui/menu.ui b/tycho/ui/menu.ui
index 954eef4..d7955c8 100644
--- a/tycho/ui/menu.ui
+++ b/tycho/ui/menu.ui
@@ -76,6 +76,7 @@
      <string>&amp;Help</string>
     </property>
     <addaction name="actionAbout"/>
+    <addaction name="actionAboutQt"/>
    </widget>
    <addaction name="menuFile"/>
    <addaction name="menuEdit"/>
@@ -135,12 +136,21 @@
     <bool>false</bool>
    </property>
    <property name="icon">
-    <iconset theme="window-close"/>
+    <iconset theme="window-close">
+     <normaloff>.</normaloff>.</iconset>
    </property>
    <property name="text">
     <string>&amp;Close</string>
    </property>
   </action>
+  <action name="actionAboutQt">
+   <property name="icon">
+    <iconset theme="help-about"/>
+   </property>
+   <property name="text">
+    <string>About Qt</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources>
@@ -259,6 +269,22 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>actionAboutQt</sender>
+   <signal>triggered()</signal>
+   <receiver>Menu</receiver>
+   <slot>openAboutQt()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>-1</x>
+     <y>-1</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>399</x>
+     <y>299</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
  <slots>
   <slot>openMapProperties()</slot>
@@ -266,5 +292,6 @@
   <slot>mapOpen()</slot>
   <slot>openAbout()</slot>
   <slot>updateActions()</slot>
+  <slot>openAboutQt()</slot>
  </slots>
 </ui>
diff --git a/tycho/ui/project.ui b/tycho/ui/project.ui
index d2ec69d..d5a21d4 100644
--- a/tycho/ui/project.ui
+++ b/tycho/ui/project.ui
@@ -15,7 +15,7 @@
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
-    <widget class="QTreeView" name="treeView">
+    <widget class="QListView" name="listView">
      <property name="frameShape">
       <enum>QFrame::NoFrame</enum>
      </property>
@@ -31,6 +31,12 @@
      <property name="horizontalScrollBarPolicy">
       <enum>Qt::ScrollBarAsNeeded</enum>
      </property>
+     <property name="viewMode">
+      <enum>QListView::IconMode</enum>
+     </property>
+     <property name="uniformItemSizes">
+      <bool>true</bool>
+     </property>
     </widget>
    </item>
   </layout>