diff --git a/block.cpp b/core/block.cpp
old mode 100755
new mode 100644
similarity index 93%
rename from block.cpp
rename to core/block.cpp
index ceff25da..27747f00
--- a/block.cpp
+++ b/core/block.cpp
@@ -1,32 +1,32 @@
-#include "block.h"
-
-Block::Block() {
-}
-
-Block::Block(uint16_t word)
-{
-    tile = word & 0x3ff;
-    collision = (word >> 10) & 0x3;
-    elevation = (word >> 12) & 0xf;
-}
-
-Block::Block(const Block &block) {
-    tile = block.tile;
-    collision = block.collision;
-    elevation = block.elevation;
-}
-
-uint16_t Block::rawValue() {
-    return static_cast<uint16_t>(
-                (tile & 0x3ff) +
-                ((collision & 0x3) << 10) +
-                ((elevation & 0xf) << 12));
-}
-
-bool Block::operator ==(Block other) {
-    return (tile == other.tile) && (collision == other.collision) && (elevation == other.elevation);
-}
-
-bool Block::operator !=(Block other) {
-    return !(operator ==(other));
-}
+#include "core/block.h"
+
+Block::Block() {
+}
+
+Block::Block(uint16_t word)
+{
+    tile = word & 0x3ff;
+    collision = (word >> 10) & 0x3;
+    elevation = (word >> 12) & 0xf;
+}
+
+Block::Block(const Block &block) {
+    tile = block.tile;
+    collision = block.collision;
+    elevation = block.elevation;
+}
+
+uint16_t Block::rawValue() {
+    return static_cast<uint16_t>(
+                (tile & 0x3ff) +
+                ((collision & 0x3) << 10) +
+                ((elevation & 0xf) << 12));
+}
+
+bool Block::operator ==(Block other) {
+    return (tile == other.tile) && (collision == other.collision) && (elevation == other.elevation);
+}
+
+bool Block::operator !=(Block other) {
+    return !(operator ==(other));
+}
diff --git a/block.h b/core/block.h
old mode 100755
new mode 100644
similarity index 93%
rename from block.h
rename to core/block.h
index 8b3943d5..b31f18b4
--- a/block.h
+++ b/core/block.h
@@ -1,20 +1,20 @@
-#ifndef BLOCK_H
-#define BLOCK_H
-
-#include <QObject>
-
-class Block
-{
-public:
-    Block();
-    Block(uint16_t);
-    Block(const Block&);
-    bool operator ==(Block);
-    bool operator !=(Block);
-    uint16_t tile:10;
-    uint16_t collision:2;
-    uint16_t elevation:4;
-    uint16_t rawValue();
-};
-
-#endif // BLOCK_H
+#ifndef BLOCK_H
+#define BLOCK_H
+
+#include <QObject>
+
+class Block
+{
+public:
+    Block();
+    Block(uint16_t);
+    Block(const Block&);
+    bool operator ==(Block);
+    bool operator !=(Block);
+    uint16_t tile:10;
+    uint16_t collision:2;
+    uint16_t elevation:4;
+    uint16_t rawValue();
+};
+
+#endif // BLOCK_H
diff --git a/blockdata.cpp b/core/blockdata.cpp
old mode 100755
new mode 100644
similarity index 92%
rename from blockdata.cpp
rename to core/blockdata.cpp
index 10901741..e9285201
--- a/blockdata.cpp
+++ b/core/blockdata.cpp
@@ -1,55 +1,54 @@
-#include "blockdata.h"
-#include <QDebug>
-
-Blockdata::Blockdata(QObject *parent) : QObject(parent)
-{
-    blocks = new QList<Block>;
-}
-
-void Blockdata::addBlock(uint16_t word) {
-    Block block(word);
-    blocks->append(block);
-}
-
-void Blockdata::addBlock(Block block) {
-    blocks->append(block);
-}
-
-QByteArray Blockdata::serialize() {
-    QByteArray data;
-    for (int i = 0; i < blocks->length(); i++) {
-        Block block = blocks->value(i);
-        uint16_t word = block.rawValue();
-        data.append(static_cast<char>(word & 0xff));
-        data.append(static_cast<char>((word >> 8) & 0xff));
-    }
-    return data;
-}
-
-void Blockdata::copyFrom(Blockdata* other) {
-    blocks->clear();
-    for (int i = 0; i < other->blocks->length(); i++) {
-        addBlock(other->blocks->value(i));
-    }
-}
-
-Blockdata* Blockdata::copy() {
-    Blockdata* blockdata = new Blockdata;
-    blockdata->copyFrom(this);
-    return blockdata;
-}
-
-bool Blockdata::equals(Blockdata *other) {
-    if (!other) {
-        return false;
-    }
-    if (blocks->length() != other->blocks->length()) {
-        return false;
-    }
-    for (int i = 0; i < blocks->length(); i++) {
-        if (blocks->value(i) != other->blocks->value(i)) {
-            return false;
-        }
-    }
-    return true;
-}
+#include "core/blockdata.h"
+
+Blockdata::Blockdata(QObject *parent) : QObject(parent)
+{
+    blocks = new QList<Block>;
+}
+
+void Blockdata::addBlock(uint16_t word) {
+    Block block(word);
+    blocks->append(block);
+}
+
+void Blockdata::addBlock(Block block) {
+    blocks->append(block);
+}
+
+QByteArray Blockdata::serialize() {
+    QByteArray data;
+    for (int i = 0; i < blocks->length(); i++) {
+        Block block = blocks->value(i);
+        uint16_t word = block.rawValue();
+        data.append(static_cast<char>(word & 0xff));
+        data.append(static_cast<char>((word >> 8) & 0xff));
+    }
+    return data;
+}
+
+void Blockdata::copyFrom(Blockdata* other) {
+    blocks->clear();
+    for (int i = 0; i < other->blocks->length(); i++) {
+        addBlock(other->blocks->value(i));
+    }
+}
+
+Blockdata* Blockdata::copy() {
+    Blockdata* blockdata = new Blockdata;
+    blockdata->copyFrom(this);
+    return blockdata;
+}
+
+bool Blockdata::equals(Blockdata *other) {
+    if (!other) {
+        return false;
+    }
+    if (blocks->length() != other->blocks->length()) {
+        return false;
+    }
+    for (int i = 0; i < blocks->length(); i++) {
+        if (blocks->value(i) != other->blocks->value(i)) {
+            return false;
+        }
+    }
+    return true;
+}
diff --git a/blockdata.h b/core/blockdata.h
old mode 100755
new mode 100644
similarity index 94%
rename from blockdata.h
rename to core/blockdata.h
index 8d87eaa4..0bb6a7b6
--- a/blockdata.h
+++ b/core/blockdata.h
@@ -1,32 +1,32 @@
-#ifndef BLOCKDATA_H
-#define BLOCKDATA_H
-
-#include "block.h"
-
-#include <QObject>
-#include <QByteArray>
-
-class Blockdata : public QObject
-{
-    Q_OBJECT
-public:
-    explicit Blockdata(QObject *parent = nullptr);
-    ~Blockdata() {
-        if (blocks) delete blocks;
-    }
-
-public:
-    QList<Block> *blocks = nullptr;
-    void addBlock(uint16_t);
-    void addBlock(Block);
-    QByteArray serialize();
-    void copyFrom(Blockdata*);
-    Blockdata* copy();
-    bool equals(Blockdata *);
-
-signals:
-
-public slots:
-};
-
-#endif // BLOCKDATA_H
+#ifndef BLOCKDATA_H
+#define BLOCKDATA_H
+
+#include "block.h"
+
+#include <QObject>
+#include <QByteArray>
+
+class Blockdata : public QObject
+{
+    Q_OBJECT
+public:
+    explicit Blockdata(QObject *parent = nullptr);
+    ~Blockdata() {
+        if (blocks) delete blocks;
+    }
+
+public:
+    QList<Block> *blocks = nullptr;
+    void addBlock(uint16_t);
+    void addBlock(Block);
+    QByteArray serialize();
+    void copyFrom(Blockdata*);
+    Blockdata* copy();
+    bool equals(Blockdata *);
+
+signals:
+
+public slots:
+};
+
+#endif // BLOCKDATA_H
diff --git a/heallocation.cpp b/core/heallocation.cpp
similarity index 100%
rename from heallocation.cpp
rename to core/heallocation.cpp
diff --git a/heallocation.h b/core/heallocation.h
similarity index 100%
rename from heallocation.h
rename to core/heallocation.h
diff --git a/core/metatile.cpp b/core/metatile.cpp
new file mode 100644
index 00000000..41ae927f
--- /dev/null
+++ b/core/metatile.cpp
@@ -0,0 +1,16 @@
+#include "core/metatile.h"
+#include "project.h"
+#include "core/tileset.h"
+
+Metatile::Metatile()
+{
+    tiles = new QList<Tile>;
+}
+
+int Metatile::getBlockIndex(int index) {
+    if (index < Project::getNumMetatilesPrimary()) {
+        return index;
+    } else {
+        return index - Project::getNumMetatilesPrimary();
+    }
+}
diff --git a/core/metatile.h b/core/metatile.h
new file mode 100644
index 00000000..b5cb19d5
--- /dev/null
+++ b/core/metatile.h
@@ -0,0 +1,17 @@
+#ifndef METATILE_H
+#define METATILE_H
+
+#include "tile.h"
+#include <QImage>
+
+class Metatile
+{
+public:
+    Metatile();
+public:
+    QList<Tile> *tiles = nullptr;
+
+    static int getBlockIndex(int);
+};
+
+#endif // METATILE_H
diff --git a/core/tile.cpp b/core/tile.cpp
new file mode 100644
index 00000000..3f404907
--- /dev/null
+++ b/core/tile.cpp
@@ -0,0 +1,6 @@
+#include "core/tile.h"
+
+Tile::Tile()
+{
+
+}
diff --git a/tile.h b/core/tile.h
old mode 100755
new mode 100644
similarity index 90%
rename from tile.h
rename to core/tile.h
index f511a7cb..d1c231cc
--- a/tile.h
+++ b/core/tile.h
@@ -1,16 +1,16 @@
-#ifndef TILE_H
-#define TILE_H
-
-
-class Tile
-{
-public:
-    Tile();
-public:
-    int tile;
-    int xflip;
-    int yflip;
-    int palette;
-};
-
-#endif // TILE_H
+#ifndef TILE_H
+#define TILE_H
+
+
+class Tile
+{
+public:
+    Tile();
+public:
+    int tile;
+    int xflip;
+    int yflip;
+    int palette;
+};
+
+#endif // TILE_H
diff --git a/tileset.cpp b/core/tileset.cpp
old mode 100755
new mode 100644
similarity index 66%
rename from tileset.cpp
rename to core/tileset.cpp
index 55fa6258..608dcb9a
--- a/tileset.cpp
+++ b/core/tileset.cpp
@@ -1,116 +1,104 @@
-#include "tileset.h"
-#include "project.h"
-
-#include <QPainter>
-#include <QImage>
-#include <QDebug>
-
-Tileset::Tileset()
-{
-
-}
-
-Metatile::Metatile()
-{
-    tiles = new QList<Tile>;
-}
-
-QImage Metatile::getMetatileImage(int tile, Tileset *primaryTileset, Tileset *secondaryTileset) {
-    QImage metatile_image(16, 16, QImage::Format_RGBA8888);
-
-    Metatile* metatile = Metatile::getMetatile(tile, primaryTileset, secondaryTileset);
-    if (!metatile || !metatile->tiles) {
-        metatile_image.fill(0xffffffff);
-        return metatile_image;
-    }
-
-    Tileset* blockTileset = Metatile::getBlockTileset(tile, primaryTileset, secondaryTileset);
-    if (!blockTileset) {
-        metatile_image.fill(0xffffffff);
-        return metatile_image;
-    }
-    QList<QList<QRgb>> palettes = Metatile::getBlockPalettes(primaryTileset, secondaryTileset);
-
-    QPainter metatile_painter(&metatile_image);
-    for (int layer = 0; layer < 2; layer++)
-    for (int y = 0; y < 2; y++)
-    for (int x = 0; x < 2; x++) {
-        Tile tile_ = metatile->tiles->value((y * 2) + x + (layer * 4));
-        QImage tile_image = Metatile::getMetatileTile(tile_.tile, primaryTileset, secondaryTileset);
-        if (tile_image.isNull()) {
-            // Some metatiles specify tiles that are outside the valid range.
-            // These are treated as completely transparent, so they can be skipped without
-            // being drawn.
-            continue;
-        }
-
-        // Colorize the metatile tiles with its palette.
-        if (tile_.palette < palettes.length()) {
-            QList<QRgb> palette = palettes.value(tile_.palette);
-            for (int j = 0; j < palette.length(); j++) {
-                tile_image.setColor(j, palette.value(j));
-            }
-        } else {
-            qDebug() << "Tile is referring to invalid palette number: " << tile_.palette;
-        }
-
-        // The top layer of the metatile has its first color displayed at transparent.
-        if (layer > 0) {
-            QColor color(tile_image.color(0));
-            color.setAlpha(0);
-            tile_image.setColor(0, color.rgba());
-        }
-
-        QPoint origin = QPoint(x*8, y*8);
-        metatile_painter.drawImage(origin, tile_image.mirrored(tile_.xflip == 1, tile_.yflip == 1));
-    }
-    metatile_painter.end();
-
-    return metatile_image;
-}
-
-Metatile* Metatile::getMetatile(int index, Tileset *primaryTileset, Tileset *secondaryTileset) {
-    Tileset *tileset = Metatile::getBlockTileset(index, primaryTileset, secondaryTileset);
-    int local_index = Metatile::getBlockIndex(index);
-    if (!tileset || !tileset->metatiles) {
-        return nullptr;
-    }
-    Metatile *metatile = tileset->metatiles->value(local_index, nullptr);
-    return metatile;
-}
-
-QImage Metatile::getMetatileTile(int tile, Tileset *primaryTileset, Tileset *secondaryTileset) {
-    Tileset *tileset = Metatile::getBlockTileset(tile, primaryTileset, secondaryTileset);
-    int local_index = Metatile::getBlockIndex(tile);
-    if (!tileset || !tileset->tiles) {
-        return QImage();
-    }
-    return tileset->tiles->value(local_index, QImage());
-}
-
-Tileset* Metatile::getBlockTileset(int metatile_index, Tileset *primaryTileset, Tileset *secondaryTileset) {
-    if (metatile_index < Project::getNumMetatilesPrimary()) {
-        return primaryTileset;
-    } else {
-        return secondaryTileset;
-    }
-}
-
-int Metatile::getBlockIndex(int index) {
-    if (index < Project::getNumMetatilesPrimary()) {
-        return index;
-    } else {
-        return index - Project::getNumMetatilesPrimary();
-    }
-}
-
-QList<QList<QRgb>> Metatile::getBlockPalettes(Tileset *primaryTileset, Tileset *secondaryTileset) {
-    QList<QList<QRgb>> palettes;
-    for (int i = 0; i < Project::getNumPalettesPrimary(); i++) {
-        palettes.append(primaryTileset->palettes->at(i));
-    }
-    for (int i = Project::getNumPalettesPrimary(); i < Project::getNumPalettesTotal(); i++) {
-        palettes.append(secondaryTileset->palettes->at(i));
-    }
-    return palettes;
-}
+#include "core/tileset.h"
+#include "core/metatile.h"
+#include "project.h"
+
+#include <QPainter>
+#include <QImage>
+#include <QDebug>
+
+Tileset::Tileset()
+{
+
+}
+
+Tileset* Tileset::getBlockTileset(int metatile_index, Tileset *primaryTileset, Tileset *secondaryTileset) {
+    if (metatile_index < Project::getNumMetatilesPrimary()) {
+        return primaryTileset;
+    } else {
+        return secondaryTileset;
+    }
+}
+
+QImage Tileset::getMetatileImage(int tile, Tileset *primaryTileset, Tileset *secondaryTileset) {
+    QImage metatile_image(16, 16, QImage::Format_RGBA8888);
+
+    Metatile* metatile = Tileset::getMetatile(tile, primaryTileset, secondaryTileset);
+    if (!metatile || !metatile->tiles) {
+        metatile_image.fill(0xffffffff);
+        return metatile_image;
+    }
+
+    Tileset* blockTileset = Tileset::getBlockTileset(tile, primaryTileset, secondaryTileset);
+    if (!blockTileset) {
+        metatile_image.fill(0xffffffff);
+        return metatile_image;
+    }
+    QList<QList<QRgb>> palettes = Tileset::getBlockPalettes(primaryTileset, secondaryTileset);
+
+    QPainter metatile_painter(&metatile_image);
+    for (int layer = 0; layer < 2; layer++)
+    for (int y = 0; y < 2; y++)
+    for (int x = 0; x < 2; x++) {
+        Tile tile_ = metatile->tiles->value((y * 2) + x + (layer * 4));
+        QImage tile_image = Tileset::getMetatileTile(tile_.tile, primaryTileset, secondaryTileset);
+        if (tile_image.isNull()) {
+            // Some metatiles specify tiles that are outside the valid range.
+            // These are treated as completely transparent, so they can be skipped without
+            // being drawn.
+            continue;
+        }
+
+        // Colorize the metatile tiles with its palette.
+        if (tile_.palette < palettes.length()) {
+            QList<QRgb> palette = palettes.value(tile_.palette);
+            for (int j = 0; j < palette.length(); j++) {
+                tile_image.setColor(j, palette.value(j));
+            }
+        } else {
+            qDebug() << "Tile is referring to invalid palette number: " << tile_.palette;
+        }
+
+        // The top layer of the metatile has its first color displayed at transparent.
+        if (layer > 0) {
+            QColor color(tile_image.color(0));
+            color.setAlpha(0);
+            tile_image.setColor(0, color.rgba());
+        }
+
+        QPoint origin = QPoint(x*8, y*8);
+        metatile_painter.drawImage(origin, tile_image.mirrored(tile_.xflip == 1, tile_.yflip == 1));
+    }
+    metatile_painter.end();
+
+    return metatile_image;
+}
+
+Metatile* Tileset::getMetatile(int index, Tileset *primaryTileset, Tileset *secondaryTileset) {
+    Tileset *tileset = Tileset::getBlockTileset(index, primaryTileset, secondaryTileset);
+    int local_index = Metatile::getBlockIndex(index);
+    if (!tileset || !tileset->metatiles) {
+        return nullptr;
+    }
+    Metatile *metatile = tileset->metatiles->value(local_index, nullptr);
+    return metatile;
+}
+
+QImage Tileset::getMetatileTile(int tile, Tileset *primaryTileset, Tileset *secondaryTileset) {
+    Tileset *tileset = Tileset::getBlockTileset(tile, primaryTileset, secondaryTileset);
+    int local_index = Metatile::getBlockIndex(tile);
+    if (!tileset || !tileset->tiles) {
+        return QImage();
+    }
+    return tileset->tiles->value(local_index, QImage());
+}
+
+QList<QList<QRgb>> Tileset::getBlockPalettes(Tileset *primaryTileset, Tileset *secondaryTileset) {
+    QList<QList<QRgb>> palettes;
+    for (int i = 0; i < Project::getNumPalettesPrimary(); i++) {
+        palettes.append(primaryTileset->palettes->at(i));
+    }
+    for (int i = Project::getNumPalettesPrimary(); i < Project::getNumPalettesTotal(); i++) {
+        palettes.append(secondaryTileset->palettes->at(i));
+    }
+    return palettes;
+}
diff --git a/tileset.h b/core/tileset.h
old mode 100755
new mode 100644
similarity index 78%
rename from tileset.h
rename to core/tileset.h
index 5cd22daa..ce6233ed
--- a/tileset.h
+++ b/core/tileset.h
@@ -1,45 +1,34 @@
-#ifndef TILESET_H
-#define TILESET_H
-
-#include "tile.h"
-#include <QImage>
-
-class Metatile;
-
-class Tileset
-{
-public:
-    Tileset();
-public:
-    QString name;
-    QString is_compressed;
-    QString is_secondary;
-    QString padding;
-    QString tiles_label;
-    QString palettes_label;
-    QString metatiles_label;
-    QString callback_label;
-    QString metatile_attrs_label;
-
-    QList<QImage> *tiles = nullptr;
-    QList<Metatile*> *metatiles = nullptr;
-    QList<QList<QRgb>> *palettes = nullptr;
-};
-
-class Metatile
-{
-public:
-    Metatile();
-public:
-    QList<Tile> *tiles = nullptr;
-    int attr;
-
-    static QImage getMetatileImage(int, Tileset*, Tileset*);
-    static Metatile* getMetatile(int, Tileset*, Tileset*);
-    static QImage getMetatileTile(int, Tileset*, Tileset*);
-    static Tileset* getBlockTileset(int, Tileset*, Tileset*);
-    static int getBlockIndex(int);
-    static QList<QList<QRgb>> getBlockPalettes(Tileset*, Tileset*);
-};
-
-#endif // TILESET_H
+#ifndef TILESET_H
+#define TILESET_H
+
+#include "core/metatile.h"
+#include "core/tile.h"
+#include <QImage>
+
+class Tileset
+{
+public:
+    Tileset();
+public:
+    QString name;
+    QString is_compressed;
+    QString is_secondary;
+    QString padding;
+    QString tiles_label;
+    QString palettes_label;
+    QString metatiles_label;
+    QString callback_label;
+    QString metatile_attrs_label;
+
+    QList<QImage> *tiles = nullptr;
+    QList<Metatile*> *metatiles = nullptr;
+    QList<QList<QRgb>> *palettes = nullptr;
+
+    static Tileset* getBlockTileset(int, Tileset*, Tileset*);
+    static QImage getMetatileImage(int, Tileset*, Tileset*);
+    static Metatile* getMetatile(int, Tileset*, Tileset*);
+    static QImage getMetatileTile(int, Tileset*, Tileset*);
+    static QList<QList<QRgb>> getBlockPalettes(Tileset*, Tileset*);
+};
+
+#endif // TILESET_H
diff --git a/editor.cpp b/editor.cpp
index cc550aaa..66e1a516 100755
--- a/editor.cpp
+++ b/editor.cpp
@@ -314,6 +314,14 @@ void Editor::onBorderMetatilesChanged() {
     displayMapBorder();
 }
 
+void Editor::onHoveredMovementPermissionChanged(uint16_t collision, uint16_t elevation) {
+    map->hoveredMovementPermissionTileChanged(collision, elevation);
+}
+
+void Editor::onHoveredMovementPermissionCleared() {
+    map->clearHoveredMovementPermissionTile();
+}
+
 void Editor::setConnectionsVisibility(bool visible) {
     for (QGraphicsPixmapItem* item : connection_items) {
         item->setVisible(visible);
@@ -500,15 +508,20 @@ void Editor::redrawCurrentMetatilesSelection() {
 }
 
 void Editor::displayCollisionMetatiles() {
-    if (collision_metatiles_item && collision_metatiles_item->scene()) {
-        collision_metatiles_item->scene()->removeItem(collision_metatiles_item);
-        delete collision_metatiles_item;
+    if (movement_permissions_selector_item && movement_permissions_selector_item->scene()) {
+        movement_permissions_selector_item->scene()->removeItem(movement_permissions_selector_item);
+        delete movement_permissions_selector_item;
     }
 
     scene_collision_metatiles = new QGraphicsScene;
-    collision_metatiles_item = new MovementPermissionsPixmapItem(map);
-    collision_metatiles_item->draw();
-    scene_collision_metatiles->addItem(collision_metatiles_item);
+    movement_permissions_selector_item = new MovementPermissionsSelector();
+    connect(movement_permissions_selector_item, SIGNAL(hoveredMovementPermissionChanged(uint16_t, uint16_t)),
+            this, SLOT(onHoveredMovementPermissionChanged(uint16_t, uint16_t)));
+    connect(movement_permissions_selector_item, SIGNAL(hoveredMovementPermissionCleared()),
+            this, SLOT(onHoveredMovementPermissionCleared()));
+    movement_permissions_selector_item->select(0, 3);
+    movement_permissions_selector_item->draw();
+    scene_collision_metatiles->addItem(movement_permissions_selector_item);
 }
 
 void Editor::displayMapEvents() {
@@ -975,7 +988,7 @@ void BorderMetatilesPixmapItem::draw() {
         int x = i * 16;
         int y = j * 16;
         int index = j * 2 + i;
-        QImage metatile_image = Metatile::getMetatileImage(blocks->value(index).tile, map->layout->tileset_primary, map->layout->tileset_secondary);
+        QImage metatile_image = Tileset::getMetatileImage(blocks->value(index).tile, map->layout->tileset_primary, map->layout->tileset_secondary);
         QPoint metatile_origin = QPoint(x, y);
         painter.drawImage(metatile_origin, metatile_image);
     }
@@ -996,7 +1009,7 @@ void CurrentSelectedMetatilesPixmapItem::draw() {
         int x = i * 16;
         int y = j * 16;
         int index = j * map->selected_metatiles_width + i;
-        QImage metatile_image = Metatile::getMetatileImage(map->selected_metatiles->at(index), map->layout->tileset_primary, map->layout->tileset_secondary);
+        QImage metatile_image = Tileset::getMetatileImage(map->selected_metatiles->at(index), map->layout->tileset_primary, map->layout->tileset_secondary);
         QPoint metatile_origin = QPoint(x, y);
         painter.drawImage(metatile_origin, metatile_image);
     }
@@ -1005,42 +1018,6 @@ void CurrentSelectedMetatilesPixmapItem::draw() {
     setPixmap(QPixmap::fromImage(image));
 }
 
-void MovementPermissionsPixmapItem::mousePressEvent(QGraphicsSceneMouseEvent* event) {
-    QPointF pos = event->pos();
-    int x = static_cast<int>(pos.x()) / 32;
-    int y = static_cast<int>(pos.y()) / 32;
-    int width = pixmap().width() / 32;
-    int height = pixmap().height() / 32;
-
-    // Snap to a valid position inside the selection area.
-    if (x < 0) x = 0;
-    if (x >= width) x = width - 1;
-    if (y < 0) y = 0;
-    if (y >= height) y = height - 1;
-    pick(static_cast<uint16_t>(x), static_cast<uint16_t>(y));
-}
-void MovementPermissionsPixmapItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event) {
-    updateCurHoveredMetatile(event->pos());
-    mousePressEvent(event);
-}
-void MovementPermissionsPixmapItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event) {
-    mousePressEvent(event);
-}
-
-void MovementPermissionsPixmapItem::updateCurHoveredMetatile(QPointF pos) {
-    int x = static_cast<int>(pos.x()) / 32;
-    int y = static_cast<int>(pos.y()) / 32;
-    int width = pixmap().width() / 32;
-    int height = pixmap().height() / 32;
-
-    // Snap to a valid position inside the selection area.
-    if (x < 0) x = 0;
-    if (x >= width) x = width - 1;
-    if (y < 0) y = 0;
-    if (y >= height) y = height - 1;
-    map->hoveredMovementPermissionTileChanged(x, y);
-}
-
 int ConnectionPixmapItem::getMinOffset() {
     if (connection->direction == "up" || connection->direction == "down")
         return 1 - (this->pixmap().width() / 16);
@@ -1608,8 +1585,8 @@ void CollisionPixmapItem::paint(QGraphicsSceneMouseEvent *event) {
         int y = static_cast<int>(pos.y()) / 16;
         Block *block = map->getBlock(x, y);
         if (block) {
-            block->collision = map->paint_collision;
-            block->elevation = map->paint_elevation;
+            block->collision = editor->movement_permissions_selector_item->getSelectedCollision();
+            block->elevation = editor->movement_permissions_selector_item->getSelectedElevation();
             map->_setBlock(x, y, *block);
         }
         if (event->type() == QEvent::GraphicsSceneMouseRelease) {
@@ -1624,7 +1601,9 @@ void CollisionPixmapItem::floodFill(QGraphicsSceneMouseEvent *event) {
         QPointF pos = event->pos();
         int x = static_cast<int>(pos.x()) / 16;
         int y = static_cast<int>(pos.y()) / 16;
-        map->floodFillCollisionElevation(x, y, map->paint_collision, map->paint_elevation);
+        uint16_t collision = editor->movement_permissions_selector_item->getSelectedCollision();
+        uint16_t elevation = editor->movement_permissions_selector_item->getSelectedElevation();
+        map->floodFillCollisionElevation(x, y, collision, elevation);
         draw();
     }
 }
@@ -1635,8 +1614,7 @@ void CollisionPixmapItem::pick(QGraphicsSceneMouseEvent *event) {
     int y = static_cast<int>(pos.y()) / 16;
     Block *block = map->getBlock(x, y);
     if (block) {
-        map->paint_collision = block->collision;
-        map->paint_elevation = block->elevation;
+        editor->movement_permissions_selector_item->select(block->collision, block->elevation);
         emit map->paintCollisionChanged(map);
     }
 }
@@ -1653,9 +1631,8 @@ void CollisionPixmapItem::updateMovementPermissionSelection(QGraphicsSceneMouseE
     if (y >= map->getHeight()) y = map->getHeight() - 1;
 
     Block *block = map->getBlock(x, y);
-    map->paint_collision = block->collision;
-    map->paint_elevation = block->elevation;
-    editor->collision_metatiles_item->draw();
+    editor->movement_permissions_selector_item->select(block->collision, block->elevation);
+    editor->movement_permissions_selector_item->draw();
 }
 
 void DraggablePixmapItem::mousePressEvent(QGraphicsSceneMouseEvent *mouse) {
diff --git a/editor.h b/editor.h
index eca36d5e..7b8eb677 100755
--- a/editor.h
+++ b/editor.h
@@ -9,6 +9,7 @@
 #include <QCheckBox>
 #include <QCursor>
 
+#include "ui/movementpermissionsselector.h"
 #include "project.h"
 #include "ui_mainwindow.h"
 
@@ -19,7 +20,6 @@ class ConnectionPixmapItem;
 class MetatilesPixmapItem;
 class BorderMetatilesPixmapItem;
 class CurrentSelectedMetatilesPixmapItem;
-class MovementPermissionsPixmapItem;
 
 #define SWAP(a, b) do { if (a != b) { a ^= b; b ^= a; a ^= b; } } while (0)
 
@@ -99,7 +99,7 @@ public:
 
     BorderMetatilesPixmapItem *selected_border_metatiles_item = nullptr;
     CurrentSelectedMetatilesPixmapItem *scene_current_metatile_selection_item = nullptr;
-    MovementPermissionsPixmapItem *collision_metatiles_item = nullptr;
+    MovementPermissionsSelector *movement_permissions_selector_item = nullptr;
 
     QList<DraggablePixmapItem*> *events = nullptr;
     QList<DraggablePixmapItem*> *selected_events = nullptr;
@@ -149,6 +149,8 @@ private slots:
     void onConnectionItemDoubleClicked(ConnectionPixmapItem* connectionItem);
     void onConnectionDirectionChanged(QString newDirection);
     void onBorderMetatilesChanged();
+    void onHoveredMovementPermissionChanged(uint16_t, uint16_t);
+    void onHoveredMovementPermissionCleared();
 
 signals:
     void objectsChanged();
@@ -409,29 +411,4 @@ public:
     virtual void draw();
 };
 
-class MovementPermissionsPixmapItem : public MetatilesPixmapItem {
-    Q_OBJECT
-public:
-    MovementPermissionsPixmapItem(Map *map_): MetatilesPixmapItem(map_) {
-        connect(map, SIGNAL(paintCollisionChanged(Map*)), this, SLOT(paintCollisionChanged(Map *)));
-    }
-    virtual void pick(uint16_t collision, uint16_t elevation) {
-        map->paint_collision = collision;
-        map->paint_elevation = elevation;
-        draw();
-    }
-    virtual void draw() {
-        setPixmap(map->renderCollisionMetatiles());
-    }
-protected:
-    void mousePressEvent(QGraphicsSceneMouseEvent*);
-    void mouseMoveEvent(QGraphicsSceneMouseEvent*);
-    void mouseReleaseEvent(QGraphicsSceneMouseEvent*);
-    virtual void updateCurHoveredMetatile(QPointF pos);
-private slots:
-    void paintCollisionChanged(Map *) {
-        draw();
-    }
-};
-
 #endif // EDITOR_H
diff --git a/event.h b/event.h
index fcb54d24..0c3293a1 100755
--- a/event.h
+++ b/event.h
@@ -1,7 +1,7 @@
 #ifndef EVENT_H
 #define EVENT_H
 
-#include "heallocation.h"
+#include "core/heallocation.h"
 #include <QString>
 #include <QPixmap>
 #include <QMap>
diff --git a/mainwindow.cpp b/mainwindow.cpp
index c5c90f65..8c0c45b9 100755
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -205,7 +205,7 @@ void MainWindow::redrawMapScene()
 
     ui->graphicsView_Collision->setScene(editor->scene_collision_metatiles);
     //ui->graphicsView_Collision->setSceneRect(editor->scene_collision_metatiles->sceneRect());
-    ui->graphicsView_Collision->setFixedSize(editor->collision_metatiles_item->pixmap().width() + 2, editor->collision_metatiles_item->pixmap().height() + 2);
+    ui->graphicsView_Collision->setFixedSize(editor->movement_permissions_selector_item->pixmap().width() + 2, editor->movement_permissions_selector_item->pixmap().height() + 2);
 }
 
 void MainWindow::openWarpMap(QString map_name, QString warp_num) {
diff --git a/map.cpp b/map.cpp
index 54298a5c..d21bec1a 100755
--- a/map.cpp
+++ b/map.cpp
@@ -11,8 +11,6 @@
 Map::Map(QObject *parent) : QObject(parent)
 {
     paint_tile_index = 1;
-    paint_collision = 0;
-    paint_elevation = 3;
     selected_metatiles_width = 1;
     selected_metatiles_height = 1;
     selected_metatiles = new QList<uint16_t>;
@@ -165,7 +163,7 @@ QPixmap Map::renderCollision(bool ignoreCache) {
         }
         changed_any = true;
         Block block = layout->blockdata->blocks->value(i);
-        QImage metatile_image = Metatile::getMetatileImage(block.tile, layout->tileset_primary, layout->tileset_secondary);
+        QImage metatile_image = Tileset::getMetatileImage(block.tile, layout->tileset_primary, layout->tileset_secondary);
         QImage collision_metatile_image = getCollisionMetatileImage(block);
         int map_y = width_ ? i / width_ : 0;
         int map_x = width_ ? i % width_ : 0;
@@ -209,7 +207,7 @@ QPixmap Map::render(bool ignoreCache = false) {
         }
         changed_any = true;
         Block block = layout->blockdata->blocks->value(i);
-        QImage metatile_image = Metatile::getMetatileImage(block.tile, layout->tileset_primary, layout->tileset_secondary);
+        QImage metatile_image = Tileset::getMetatileImage(block.tile, layout->tileset_primary, layout->tileset_secondary);
         int map_y = width_ ? i / width_ : 0;
         int map_x = width_ ? i % width_ : 0;
         QPoint metatile_origin = QPoint(map_x * 16, map_y * 16);
@@ -243,7 +241,7 @@ QPixmap Map::renderBorder() {
         }
         changed_any = true;
         Block block = layout->border->blocks->value(i);
-        QImage metatile_image = Metatile::getMetatileImage(block.tile, layout->tileset_primary, layout->tileset_secondary);
+        QImage metatile_image = Tileset::getMetatileImage(block.tile, layout->tileset_primary, layout->tileset_secondary);
         int map_y = i / width_;
         int map_x = i % width_;
         painter.drawImage(QPoint(map_x * 16, map_y * 16), metatile_image);
@@ -291,23 +289,6 @@ QPixmap Map::renderConnection(Connection connection) {
     return QPixmap::fromImage(connection_image);
 }
 
-QPixmap Map::renderCollisionMetatiles() {
-    int width_ = 2;
-    int height_ = 16;
-    QImage image(width_ * 32, height_ * 32, QImage::Format_RGBA8888);
-    QPainter painter(&image);
-    for (int i = 0; i < width_; i++) {
-        for (int j = 0; j < height_; j++) {
-            QPoint origin(i * 32, j * 32);
-            QImage metatile_image = getCollisionMetatileImage(i, j).scaled(32, 32);
-            painter.drawImage(origin, metatile_image);
-        }
-    }
-    drawSelection(paint_collision + paint_elevation * width_, width_, 1, 1, &painter, 32);
-    painter.end();
-    return QPixmap::fromImage(image);
-}
-
 void Map::drawSelection(int i, int w, int selectionWidth, int selectionHeight, QPainter *painter, int gridWidth) {
     int x = i % w;
     int y = i / w;
@@ -340,7 +321,7 @@ QPixmap Map::renderMetatiles() {
         if (i >= primary_length) {
             tile += Project::getNumMetatilesPrimary() - primary_length;
         }
-        QImage metatile_image = Metatile::getMetatileImage(tile, layout->tileset_primary, layout->tileset_secondary);
+        QImage metatile_image = Tileset::getMetatileImage(tile, layout->tileset_primary, layout->tileset_secondary);
         int map_y = i / width_;
         int map_x = i % width_;
         QPoint metatile_origin = QPoint(map_x * 16, map_y * 16);
diff --git a/map.h b/map.h
index b7c36b2e..60909193 100755
--- a/map.h
+++ b/map.h
@@ -1,8 +1,8 @@
 #ifndef MAP_H
 #define MAP_H
 
-#include "tileset.h"
-#include "blockdata.h"
+#include "core/tileset.h"
+#include "core/blockdata.h"
 #include "event.h"
 
 #include <QPixmap>
@@ -165,7 +165,6 @@ public:
     QPixmap collision_pixmap;
     QImage getCollisionMetatileImage(Block);
     QImage getCollisionMetatileImage(int, int);
-    QPixmap renderCollisionMetatiles();
 
     void drawSelection(int i, int w, int selectionWidth, int selectionHeight, QPainter *painter, int gridWidth);
 
@@ -186,8 +185,6 @@ public:
     int selected_metatiles_width;
     int selected_metatiles_height;
     QList<uint16_t> *selected_metatiles = nullptr;
-    uint16_t paint_collision;
-    uint16_t paint_elevation;
 
     Block *getBlock(int x, int y);
     void setBlock(int x, int y, Block block);
@@ -219,7 +216,6 @@ public:
     void clearHoveredTile();
     void hoveredMetatileChanged(int block);
     void clearHoveredMetatile();
-    void hoveredMovementPermissionTileChanged(int collision, int elevation);
     void clearHoveredMovementPermissionTile();
     void setSelectedMetatilesFromTilePicker();
 
@@ -231,6 +227,7 @@ signals:
     void statusBarMessage(QString);
 
 public slots:
+    void hoveredMovementPermissionTileChanged(int collision, int elevation);
 };
 
 #endif // MAP_H
diff --git a/parseutil.h b/parseutil.h
index 23e095fc..b8dbdea4 100755
--- a/parseutil.h
+++ b/parseutil.h
@@ -1,7 +1,7 @@
 #ifndef PARSEUTIL_H
 #define PARSEUTIL_H
 
-#include "heallocation.h"
+#include "core/heallocation.h"
 
 #include <QString>
 #include <QList>
diff --git a/porymap.pro b/porymap.pro
index f1d68efb..214b60bd 100755
--- a/porymap.pro
+++ b/porymap.pro
@@ -14,40 +14,46 @@ RC_ICONS = resources/icons/porymap-icon-1.ico
 ICON = resources/icons/porymap-icon-1.ico
 
 
-SOURCES += main.cpp\
-        mainwindow.cpp \
-    project.cpp \
-    map.cpp \
-    blockdata.cpp \
-    block.cpp \
-    tileset.cpp \
-    tile.cpp \
-    event.cpp \
+SOURCES += core/block.cpp \
+    core/blockdata.cpp \
+    core/heallocation.cpp \
+    core/metatile.cpp \
+    core/tile.cpp \
+    core/tileset.cpp \
+    ui/movementpermissionsselector.cpp \
+    ui/selectablepixmapitem.cpp \
     editor.cpp \
-    objectpropertiesframe.cpp \
+    event.cpp \
     graphicsview.cpp \
-    parseutil.cpp \
+    main.cpp \
+    mainwindow.cpp \
+    map.cpp \
     neweventtoolbutton.cpp \
     noscrollcombobox.cpp \
     noscrollspinbox.cpp \
-    heallocation.cpp
+    objectpropertiesframe.cpp \
+    parseutil.cpp \
+    project.cpp
 
-HEADERS  += mainwindow.h \
-    project.h \
-    map.h \
-    blockdata.h \
-    block.h \
-    tileset.h \
-    tile.h \
-    event.h \
+HEADERS  += core/block.h \
+    core/blockdata.h \
+    core/heallocation.h \
+    core/metatile.h \
+    core/tile.h \
+    core/tileset.h \
+    ui/movementpermissionsselector.h \
+    ui/selectablepixmapitem.h \
     editor.h \
-    objectpropertiesframe.h \
+    event.h \
     graphicsview.h \
-    parseutil.h \
+    mainwindow.h \
+    map.h \
     neweventtoolbutton.h \
     noscrollcombobox.h \
     noscrollspinbox.h \
-    heallocation.h
+    objectpropertiesframe.h \
+    parseutil.h \
+    project.h
 
 FORMS    += mainwindow.ui \
     objectpropertiesframe.ui
diff --git a/project.cpp b/project.cpp
index 9cce7bbb..c68bdc5e 100755
--- a/project.cpp
+++ b/project.cpp
@@ -1,7 +1,7 @@
 #include "parseutil.h"
 #include "project.h"
-#include "tile.h"
-#include "tileset.h"
+#include "core/tile.h"
+#include "core/tileset.h"
 #include "event.h"
 
 #include <QDebug>
@@ -849,11 +849,6 @@ void Project::loadTilesetAssets(Tileset* tileset) {
             if (num_metatiles > num_metatileAttrs)
                 num_metatiles = num_metatileAttrs;
         }
-        for (int i = 0; i < num_metatiles; i++) {
-            uint16_t word = data[i*2] & 0xff;
-            word += (data[i*2 + 1] & 0xff) << 8;
-            tileset->metatiles->value(i)->attr = word;
-        }
     } else {
         qDebug() << QString("Could not open '%1'").arg(metatile_attrs_path);
     }
diff --git a/project.h b/project.h
index cb1a10ee..4db52a89 100755
--- a/project.h
+++ b/project.h
@@ -2,8 +2,8 @@
 #define PROJECT_H
 
 #include "map.h"
-#include "blockdata.h"
-#include "heallocation.h"
+#include "core/blockdata.h"
+#include "core/heallocation.h"
 
 #include <QStringList>
 #include <QList>
diff --git a/tile.cpp b/tile.cpp
deleted file mode 100755
index fd0f42f3..00000000
--- a/tile.cpp
+++ /dev/null
@@ -1,6 +0,0 @@
-#include "tile.h"
-
-Tile::Tile()
-{
-
-}
diff --git a/ui/movementpermissionsselector.cpp b/ui/movementpermissionsselector.cpp
new file mode 100644
index 00000000..d0df030b
--- /dev/null
+++ b/ui/movementpermissionsselector.cpp
@@ -0,0 +1,59 @@
+#include "movementpermissionsselector.h"
+#include <QPainter>
+
+void MovementPermissionsSelector::draw() {
+    QPixmap pixmap(":/images/collisions.png");
+    this->setPixmap(pixmap.scaled(64, 512));
+    this->drawSelection();
+}
+
+uint16_t MovementPermissionsSelector::getSelectedCollision() {
+    return static_cast<uint16_t>(this->selectionInitialX);
+}
+
+uint16_t MovementPermissionsSelector::getSelectedElevation() {
+    return static_cast<uint16_t>(this->selectionInitialY);
+}
+
+void MovementPermissionsSelector::select(uint16_t collision, uint16_t elevation) {
+    SelectablePixmapItem::select(collision, elevation, 0, 0);
+}
+
+void MovementPermissionsSelector::mousePressEvent(QGraphicsSceneMouseEvent* event) {
+    SelectablePixmapItem::mousePressEvent(event);
+    this->setSelectedMovementPermissions(event->pos());
+}
+
+void MovementPermissionsSelector::mouseMoveEvent(QGraphicsSceneMouseEvent* event) {
+    SelectablePixmapItem::mouseMoveEvent(event);
+    this->setSelectedMovementPermissions(event->pos());
+}
+
+void MovementPermissionsSelector::mouseReleaseEvent(QGraphicsSceneMouseEvent* event) {
+    SelectablePixmapItem::mouseReleaseEvent(event);
+    this->setSelectedMovementPermissions(event->pos());
+}
+
+void MovementPermissionsSelector::setSelectedMovementPermissions(QPointF pos) {
+    int x = static_cast<int>(pos.x()) / 32;
+    int y = static_cast<int>(pos.y()) / 32;
+    int width = this->pixmap().width() / 32;
+    int height = this->pixmap().height() / 32;
+
+    // Snap to a valid position inside the selection area.
+    if (x < 0) x = 0;
+    if (x >= width) x = width - 1;
+    if (y < 0) y = 0;
+    if (y >= height) y = height - 1;
+}
+
+void MovementPermissionsSelector::hoverMoveEvent(QGraphicsSceneHoverEvent *event) {
+    QPoint pos = this->getCellPos(event->pos());
+    uint16_t collision = static_cast<uint16_t>(pos.x());
+    uint16_t elevation = static_cast<uint16_t>(pos.y());
+    emit this->hoveredMovementPermissionChanged(collision, elevation);
+}
+
+void MovementPermissionsSelector::hoverLeaveEvent(QGraphicsSceneHoverEvent *) {
+    emit this->hoveredMovementPermissionCleared();
+}
diff --git a/ui/movementpermissionsselector.h b/ui/movementpermissionsselector.h
new file mode 100644
index 00000000..e7f03bf8
--- /dev/null
+++ b/ui/movementpermissionsselector.h
@@ -0,0 +1,32 @@
+#ifndef MOVEMENTPERMISSIONSSELECTOR_H
+#define MOVEMENTPERMISSIONSSELECTOR_H
+
+#include "selectablepixmapitem.h"
+
+class MovementPermissionsSelector: public SelectablePixmapItem {
+    Q_OBJECT
+public:
+    MovementPermissionsSelector(): SelectablePixmapItem(32, 32, 1, 1) {
+        setAcceptHoverEvents(true);
+    }
+    void draw();
+    uint16_t getSelectedCollision();
+    uint16_t getSelectedElevation();
+    void select(uint16_t collision, uint16_t elevation);
+
+protected:
+    void mousePressEvent(QGraphicsSceneMouseEvent*);
+    void mouseMoveEvent(QGraphicsSceneMouseEvent*);
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent*);
+    void hoverMoveEvent(QGraphicsSceneHoverEvent*);
+    void hoverLeaveEvent(QGraphicsSceneHoverEvent*);
+
+private:
+    void setSelectedMovementPermissions(QPointF);
+
+signals:
+    void hoveredMovementPermissionChanged(uint16_t, uint16_t);
+    void hoveredMovementPermissionCleared();
+};
+
+#endif // MOVEMENTPERMISSIONSSELECTOR_H
diff --git a/ui/selectablepixmapitem.cpp b/ui/selectablepixmapitem.cpp
new file mode 100644
index 00000000..c120c325
--- /dev/null
+++ b/ui/selectablepixmapitem.cpp
@@ -0,0 +1,100 @@
+#include "selectablepixmapitem.h"
+#include <QPainter>
+
+QPoint SelectablePixmapItem::getSelectionDimensions()
+{
+    return QPoint(abs(this->selectionOffsetX) + 1, abs(this->selectionOffsetY) + 1);
+}
+
+QPoint SelectablePixmapItem::getSelectionStart()
+{
+    return QPoint(this->selectionInitialX + this->selectionOffsetX,
+                  this->selectionInitialY + this->selectionOffsetY);
+}
+
+void SelectablePixmapItem::select(int x, int y, int width, int height)
+{
+    this->selectionInitialX = x;
+    this->selectionInitialY = y;
+    this->selectionOffsetX = qMax(0, qMin(width, this->maxSelectionWidth));
+    this->selectionOffsetY = qMax(0, qMin(height, this->maxSelectionHeight));
+}
+
+void SelectablePixmapItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    QPoint pos = this->getCellPos(event->pos());
+    this->selectionInitialX = pos.x();
+    this->selectionInitialY = pos.y();
+    this->selectionOffsetX = 0;
+    this->selectionOffsetY = 0;
+    this->updateSelection(pos.x(), pos.y());
+}
+
+void SelectablePixmapItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    QPoint pos = this->getCellPos(event->pos());
+    this->updateSelection(pos.x(), pos.y());
+}
+
+void SelectablePixmapItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    QPoint pos = this->getCellPos(event->pos());
+    this->updateSelection(pos.x(), pos.y());
+}
+
+void SelectablePixmapItem::updateSelection(int x, int y)
+{
+    // Snap to a valid position inside the selection area.
+    int width = pixmap().width() / this->cellWidth;
+    int height = pixmap().height() / this->cellHeight;
+    if (x < 0) x = 0;
+    if (x >= width) x = width - 1;
+    if (y < 0) y = 0;
+    if (y >= height) y = height - 1;
+
+    this->selectionOffsetX = x - this->selectionInitialX;
+    this->selectionOffsetY = y - this->selectionInitialY;
+
+    // Respect max selection dimensions by moving the selection's origin.
+    if (this->selectionOffsetX >= this->maxSelectionWidth) {
+        this->selectionInitialX += this->selectionOffsetX - this->maxSelectionWidth + 1;
+        this->selectionOffsetX = this->maxSelectionWidth - 1;
+    } else if (this->selectionOffsetX <= -this->maxSelectionWidth) {
+        this->selectionInitialX += this->selectionOffsetX + this->maxSelectionWidth - 1;
+        this->selectionOffsetX = -this->maxSelectionWidth + 1;
+    }
+    if (this->selectionOffsetY >= this->maxSelectionHeight) {
+        this->selectionInitialY += this->selectionOffsetY - this->maxSelectionHeight + 1;
+        this->selectionOffsetY = this->maxSelectionHeight - 1;
+    } else if (this->selectionOffsetY <= -this->maxSelectionHeight) {
+        this->selectionInitialY += this->selectionOffsetY + this->maxSelectionHeight - 1;
+        this->selectionOffsetY = -this->maxSelectionHeight + 1;
+    }
+
+    this->draw();
+}
+
+QPoint SelectablePixmapItem::getCellPos(QPointF pos)
+{
+    return QPoint(static_cast<int>(pos.x()) / this->cellWidth,
+                  static_cast<int>(pos.y()) / this->cellHeight);
+}
+
+void SelectablePixmapItem::drawSelection()
+{
+    QPixmap pixmap = this->pixmap();
+    QPainter painter(&pixmap);
+    QPoint origin = this->getSelectionStart();
+    QPoint dimensions = this->getSelectionDimensions();
+
+    int rectWidth = dimensions.x() * this->cellWidth;
+    int rectHeight = dimensions.y() * this->cellHeight;
+
+    painter.setPen(QColor(0xff, 0xff, 0xff));
+    painter.drawRect(origin.x() * this->cellWidth, origin.y() * this->cellHeight, rectWidth - 1, rectHeight -1);
+    painter.setPen(QColor(0, 0, 0));
+    painter.drawRect(origin.x() * this->cellWidth - 1, origin.y() * this->cellHeight - 1, rectWidth + 1, rectHeight + 1);
+    painter.drawRect(origin.x() * this->cellWidth + 1, origin.y() * this->cellHeight + 1, rectWidth - 3, rectHeight - 3);
+
+    this->setPixmap(pixmap);
+}
diff --git a/ui/selectablepixmapitem.h b/ui/selectablepixmapitem.h
new file mode 100644
index 00000000..293ac659
--- /dev/null
+++ b/ui/selectablepixmapitem.h
@@ -0,0 +1,39 @@
+#ifndef SELECTABLEPIXMAPITEM_H
+#define SELECTABLEPIXMAPITEM_H
+
+#include <QGraphicsPixmapItem>
+#include <QGraphicsSceneMouseEvent>
+
+class SelectablePixmapItem : public QObject, public QGraphicsPixmapItem {
+    Q_OBJECT
+public:
+    SelectablePixmapItem(int cellWidth, int cellHeight, int maxSelectionWidth, int maxSelectionHeight) {
+        this->cellWidth = cellWidth;
+        this->cellHeight = cellHeight;
+        this->maxSelectionWidth = maxSelectionWidth;
+        this->maxSelectionHeight = maxSelectionHeight;
+    }
+    QPoint getSelectionDimensions();
+    QPoint getSelectionStart();
+    virtual void draw() = 0;
+
+protected:
+    int cellWidth;
+    int cellHeight;
+    int maxSelectionWidth;
+    int maxSelectionHeight;
+    int selectionInitialX;
+    int selectionInitialY;
+    int selectionOffsetX;
+    int selectionOffsetY;
+
+    void select(int, int, int, int);
+    void updateSelection(int, int);
+    QPoint getCellPos(QPointF);
+    void mousePressEvent(QGraphicsSceneMouseEvent*);
+    void mouseMoveEvent(QGraphicsSceneMouseEvent*);
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent*);
+    virtual void drawSelection();
+};
+
+#endif // SELECTABLEPIXMAPITEM_H