diff --git a/editor.cpp b/editor.cpp
index ac470c02..4a56cdb3 100755
--- a/editor.cpp
+++ b/editor.cpp
@@ -26,13 +26,15 @@ void Editor::save() {
 
 void Editor::undo() {
     if (current_view) {
-        ((MapPixmapItem*)current_view)->undo();
+        map->undo();
+        map_item->draw();
     }
 }
 
 void Editor::redo() {
     if (current_view) {
-        ((MapPixmapItem*)current_view)->redo();
+        map->redo();
+        map_item->draw();
     }
 }
 
@@ -58,6 +60,7 @@ void Editor::setEditingMap() {
 void Editor::setEditingCollision() {
     current_view = collision_item;
     if (collision_item) {
+        displayMapConnections();
         collision_item->draw();
         collision_item->setVisible(true);
         setConnectionsVisibility(true);
@@ -318,8 +321,8 @@ void Editor::setMap(QString map_name) {
     }
     if (project) {
         map = project->loadMap(map_name);
-        displayMap();
         selected_events->clear();
+        displayMap();
         updateSelectedEvents();
     }
 }
@@ -879,9 +882,6 @@ void MetatilesPixmapItem::updateSelection(QPointF pos, Qt::MouseButton button) {
         map->paint_tile_index = baseTileY * 8 + baseTileX;
         map->paint_tile_width = abs(map->paint_metatile_initial_x - x) + 1;
         map->paint_tile_height = abs(map->paint_metatile_initial_y - y) + 1;
-        map->smart_paths_enabled = button == Qt::RightButton
-                                && map->paint_tile_width == 3
-                                && map->paint_tile_height == 3;
         emit map->paintTileChanged(map);
     }
 }
@@ -1029,7 +1029,7 @@ void MapPixmapItem::paint(QGraphicsSceneMouseEvent *event) {
         int x = (int)(pos.x()) / 16;
         int y = (int)(pos.y()) / 16;
 
-        if (map->smart_paths_enabled) {
+        if (map->smart_paths_enabled && map->paint_tile_width == 3 && map->paint_tile_height == 3) {
             paintSmartPath(x, y);
         } else {
             paintNormal(x, y);
@@ -1157,11 +1157,163 @@ void MapPixmapItem::floodFill(QGraphicsSceneMouseEvent *event) {
         QPointF pos = event->pos();
         int x = (int)(pos.x()) / 16;
         int y = (int)(pos.y()) / 16;
-        map->floodFill(x, y, map->getSelectedBlockIndex(map->paint_tile_index));
+        Block *block = map->getBlock(x, y);
+        int tile = map->getSelectedBlockIndex(map->paint_tile_index);
+        if (block && block->tile != tile) {
+            if (map->smart_paths_enabled && map->paint_tile_width == 3 && map->paint_tile_height == 3)
+                this->_floodFillSmartPath(x, y);
+            else
+                this->_floodFill(x, y);
+        }
+
+        if (event->type() == QEvent::GraphicsSceneMouseRelease) {
+            map->commit();
+        }
         draw();
     }
 }
 
+void MapPixmapItem::_floodFill(int initialX, int initialY) {
+    QList<QPoint> todo;
+    todo.append(QPoint(initialX, initialY));
+    while (todo.length()) {
+        QPoint point = todo.takeAt(0);
+        int x = point.x();
+        int y = point.y();
+
+        Block *block = map->getBlock(x, y);
+        if (block == NULL) {
+            continue;
+        }
+
+        int xDiff = x - initialX;
+        int yDiff = y - initialY;
+        int i = xDiff % map->paint_tile_width;
+        int j = yDiff % map->paint_tile_height;
+        if (i < 0) i = map->paint_tile_width + i;
+        if (j < 0) j = map->paint_tile_height + j;
+        int tile = map->getSelectedBlockIndex(map->paint_tile_index + i + (j * 8));
+        uint old_tile = block->tile;
+        if (old_tile == tile) {
+            continue;
+        }
+
+        block->tile = tile;
+        map->_setBlock(x, y, *block);
+        if ((block = map->getBlock(x + 1, y)) && block->tile == old_tile) {
+            todo.append(QPoint(x + 1, y));
+        }
+        if ((block = map->getBlock(x - 1, y)) && block->tile == old_tile) {
+            todo.append(QPoint(x - 1, y));
+        }
+        if ((block = map->getBlock(x, y + 1)) && block->tile == old_tile) {
+            todo.append(QPoint(x, y + 1));
+        }
+        if ((block = map->getBlock(x, y - 1)) && block->tile == old_tile) {
+            todo.append(QPoint(x, y - 1));
+        }
+    }
+}
+
+void MapPixmapItem::_floodFillSmartPath(int initialX, int initialY) {
+    // Smart path should never be enabled without a 3x3 block selection.
+    if (map->paint_tile_width != 3 || map->paint_tile_height != 3) return;
+
+    // Shift to the middle tile of the smart path selection.
+    int openTile = map->paint_tile_index + 8 + 1;
+
+    // Flood fill the region with the open tile.
+    QList<QPoint> todo;
+    todo.append(QPoint(initialX, initialY));
+    while (todo.length()) {
+        QPoint point = todo.takeAt(0);
+        int x = point.x();
+        int y = point.y();
+
+        Block *block = map->getBlock(x, y);
+        if (block == NULL) {
+            continue;
+        }
+
+        int tile = map->getSelectedBlockIndex(openTile);
+        uint old_tile = block->tile;
+        if (old_tile == tile) {
+            continue;
+        }
+
+        block->tile = tile;
+        map->_setBlock(x, y, *block);
+        if ((block = map->getBlock(x + 1, y)) && block->tile == old_tile) {
+            todo.append(QPoint(x + 1, y));
+        }
+        if ((block = map->getBlock(x - 1, y)) && block->tile == old_tile) {
+            todo.append(QPoint(x - 1, y));
+        }
+        if ((block = map->getBlock(x, y + 1)) && block->tile == old_tile) {
+            todo.append(QPoint(x, y + 1));
+        }
+        if ((block = map->getBlock(x, y - 1)) && block->tile == old_tile) {
+            todo.append(QPoint(x, y - 1));
+        }
+    }
+
+    // Go back and resolve the flood-filled edge tiles.
+    // Mark tiles as visited while we go.
+    bool visited[map->getWidth() * map->getHeight()];
+    for (int i = 0; i < sizeof visited; i++)
+        visited[i] = false;
+
+    todo.append(QPoint(initialX, initialY));
+    while (todo.length()) {
+        QPoint point = todo.takeAt(0);
+        int x = point.x();
+        int y = point.y();
+        visited[x + y * map->getWidth()] = true;
+
+        Block *block = map->getBlock(x, y);
+        if (block == NULL) {
+            continue;
+        }
+
+        int id = 0;
+        Block *top = map->getBlock(x, y - 1);
+        Block *right = map->getBlock(x + 1, y);
+        Block *bottom = map->getBlock(x, y + 1);
+        Block *left = map->getBlock(x - 1, y);
+
+        // Get marching squares value, to determine which tile to use.
+        if (top && IS_SMART_PATH_TILE(top))
+            id += 1;
+        if (right && IS_SMART_PATH_TILE(right))
+            id += 2;
+        if (bottom && IS_SMART_PATH_TILE(bottom))
+            id += 4;
+        if (left && IS_SMART_PATH_TILE(left))
+            id += 8;
+
+        block->tile = map->getSelectedBlockIndex(map->paint_tile_index + smartPathTable[id]);
+        map->_setBlock(x, y, *block);
+
+        // Visit neighbors if they are smart-path tiles, and don't revisit any.
+        if (!visited[x + 1 + y * map->getWidth()] && (block = map->getBlock(x + 1, y)) && IS_SMART_PATH_TILE(block)) {
+            todo.append(QPoint(x + 1, y));
+            visited[x + 1 + y * map->getWidth()] = true;
+        }
+        if (!visited[x - 1 + y * map->getWidth()] && (block = map->getBlock(x - 1, y)) && IS_SMART_PATH_TILE(block)) {
+            todo.append(QPoint(x - 1, y));
+            visited[x - 1 + y * map->getWidth()] = true;
+        }
+        if (!visited[x + (y + 1) * map->getWidth()] && (block = map->getBlock(x, y + 1)) && IS_SMART_PATH_TILE(block)) {
+            todo.append(QPoint(x, y + 1));
+            visited[x + (y + 1) * map->getWidth()] = true;
+        }
+        if (!visited[x + (y - 1) * map->getWidth()] && (block = map->getBlock(x, y - 1)) && IS_SMART_PATH_TILE(block)) {
+            todo.append(QPoint(x, y - 1));
+            visited[x + (y - 1) * map->getWidth()] = true;
+        }
+    }
+}
+
 void MapPixmapItem::pick(QGraphicsSceneMouseEvent *event) {
     QPointF pos = event->pos();
     int x = (int)(pos.x()) / 16;
@@ -1215,20 +1367,6 @@ void MapPixmapItem::draw(bool ignoreCache) {
     }
 }
 
-void MapPixmapItem::undo() {
-    if (map) {
-        map->undo();
-        draw();
-    }
-}
-
-void MapPixmapItem::redo() {
-    if (map) {
-        map->redo();
-        draw();
-    }
-}
-
 void MapPixmapItem::updateCurHoveredTile(QPointF pos) {
     int x = ((int)pos.x()) / 16;
     int y = ((int)pos.y()) / 16;
diff --git a/editor.h b/editor.h
index b93f9bd5..c096d1a5 100755
--- a/editor.h
+++ b/editor.h
@@ -250,10 +250,10 @@ public:
     QList<QPoint> selection;
     virtual void paint(QGraphicsSceneMouseEvent*);
     virtual void floodFill(QGraphicsSceneMouseEvent*);
+    void _floodFill(int x, int y);
+    void _floodFillSmartPath(int initialX, int initialY);
     virtual void pick(QGraphicsSceneMouseEvent*);
     virtual void select(QGraphicsSceneMouseEvent*);
-    virtual void undo();
-    virtual void redo();
     virtual void draw(bool ignoreCache = false);
 
 private:
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 697963cd..87254a63 100755
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -15,6 +15,8 @@
 #include <QSpacerItem>
 #include <QFont>
 #include <QScrollBar>
+#include <QMessageBox>
+#include <QDialogButtonBox>
 
 MainWindow::MainWindow(QWidget *parent) :
     QMainWindow(parent),
@@ -147,7 +149,22 @@ void MainWindow::setMap(QString map_name) {
         return;
     }
     editor->setMap(map_name);
+    redrawMapScene();
+    displayMapProperties();
 
+    setWindowTitle(map_name + " - " + editor->project->getProjectTitle() + " - pretmap");
+
+    connect(editor->map, SIGNAL(mapChanged(Map*)), this, SLOT(onMapChanged(Map *)));
+    connect(editor->map, SIGNAL(mapNeedsRedrawing(Map*)), this, SLOT(onMapNeedsRedrawing(Map *)));
+    connect(editor->map, SIGNAL(statusBarMessage(QString)), this, SLOT(setStatusBarMessage(QString)));
+
+    setRecentMap(map_name);
+    updateMapList();
+}
+
+void MainWindow::redrawMapScene()
+{
+    editor->displayMap();
     on_tabWidget_currentChanged(ui->tabWidget->currentIndex());
 
     ui->graphicsView_Map->setScene(editor->scene);
@@ -177,16 +194,6 @@ void MainWindow::setMap(QString map_name) {
     ui->graphicsView_Elevation->setScene(editor->scene_elevation_metatiles);
     //ui->graphicsView_Elevation->setSceneRect(editor->scene_elevation_metatiles->sceneRect());
     ui->graphicsView_Elevation->setFixedSize(editor->elevation_metatiles_item->pixmap().width() + 2, editor->elevation_metatiles_item->pixmap().height() + 2);
-
-    displayMapProperties();
-
-    setWindowTitle(map_name + " - " + editor->project->getProjectTitle() + " - pretmap");
-
-    connect(editor->map, SIGNAL(mapChanged(Map*)), this, SLOT(onMapChanged(Map *)));
-    connect(editor->map, SIGNAL(statusBarMessage(QString)), this, SLOT(setStatusBarMessage(QString)));
-
-    setRecentMap(map_name);
-    updateMapList();
 }
 
 void MainWindow::setRecentMap(QString map_name) {
@@ -785,6 +792,10 @@ void MainWindow::onMapChanged(Map *map) {
     updateMapList();
 }
 
+void MainWindow::onMapNeedsRedrawing(Map *map) {
+    redrawMapScene();
+}
+
 void MainWindow::on_action_Export_Map_Image_triggered()
 {
     QString defaultFilepath = QString("%1/%2.png").arg(editor->project->root).arg(editor->map->name);
@@ -838,3 +849,68 @@ void MainWindow::on_comboBox_SecondaryTileset_activated(const QString &tilesetLa
 {
     editor->updateSecondaryTileset(tilesetLabel);
 }
+
+void MainWindow::on_pushButton_clicked()
+{
+    QDialog dialog(this, Qt::WindowTitleHint | Qt::WindowCloseButtonHint);
+    dialog.setWindowTitle("Change Map Dimensions");
+    dialog.setWindowModality(Qt::NonModal);
+
+    QFormLayout form(&dialog);
+
+    QSpinBox *widthSpinBox = new QSpinBox();
+    QSpinBox *heightSpinBox = new QSpinBox();
+    widthSpinBox->setMinimum(1);
+    heightSpinBox->setMinimum(1);
+    // See below for explanation of maximum map dimensions
+    widthSpinBox->setMaximum(0x1E7);
+    heightSpinBox->setMaximum(0x1D1);
+    widthSpinBox->setValue(editor->map->getWidth());
+    heightSpinBox->setValue(editor->map->getHeight());
+    form.addRow(new QLabel("Width"), widthSpinBox);
+    form.addRow(new QLabel("Height"), heightSpinBox);
+
+    QLabel *errorLabel = new QLabel();
+    QPalette errorPalette;
+    errorPalette.setColor(QPalette::WindowText, Qt::red);
+    errorLabel->setPalette(errorPalette);
+    errorLabel->setVisible(false);
+
+    QDialogButtonBox buttonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, Qt::Horizontal, &dialog);
+    form.addRow(&buttonBox);
+    connect(&buttonBox, &QDialogButtonBox::accepted, [&dialog, &widthSpinBox, &heightSpinBox, &errorLabel](){
+        // Ensure width and height are an acceptable size.
+        // The maximum number of metatiles in a map is the following:
+        //    max = (width + 15) * (height + 14)
+        // This limit can be found in fieldmap.c in pokeruby/pokeemerald.
+        int realWidth = widthSpinBox->value() + 15;
+        int realHeight = heightSpinBox->value() + 14;
+        int numMetatiles = realWidth * realHeight;
+        if (numMetatiles <= 0x2800) {
+            dialog.accept();
+        } else {
+            QString errorText = QString("Error: The specified width and height are too large.\n"
+                    "The maximum width and height is the following: (width + 15) * (height + 14) <= 10240\n"
+                    "The specified width and height was: (%1 + 15) * (%2 + 14) = %3")
+                        .arg(widthSpinBox->value())
+                        .arg(heightSpinBox->value())
+                        .arg(numMetatiles);
+            errorLabel->setText(errorText);
+            errorLabel->setVisible(true);
+        }
+    });
+    connect(&buttonBox, SIGNAL(rejected()), &dialog, SLOT(reject()));
+
+    form.addRow(errorLabel);
+
+    if (dialog.exec() == QDialog::Accepted) {
+        editor->map->setDimensions(widthSpinBox->value(), heightSpinBox->value());
+        editor->map->commit();
+        onMapNeedsRedrawing(editor->map);
+    }
+}
+
+void MainWindow::on_checkBox_smartPaths_stateChanged(int selected)
+{
+    editor->map->smart_paths_enabled = selected == Qt::Checked;
+}
diff --git a/mainwindow.h b/mainwindow.h
index 88f08661..04b4cdb6 100755
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -38,6 +38,7 @@ private slots:
 
     void onLoadMapRequested(QString, QString);
     void onMapChanged(Map *map);
+    void onMapNeedsRedrawing(Map *map);
 
     void on_action_Save_triggered();
     void on_tabWidget_2_currentChanged(int index);
@@ -93,6 +94,10 @@ private slots:
 
     void on_comboBox_SecondaryTileset_activated(const QString &arg1);
 
+    void on_pushButton_clicked();
+
+    void on_checkBox_smartPaths_stateChanged(int selected);
+
 private:
     Ui::MainWindow *ui;
     QStandardItemModel *mapListModel;
@@ -100,6 +105,7 @@ private:
     Editor *editor = NULL;
     QIcon* mapIcon;
     void setMap(QString);
+    void redrawMapScene();
     void loadDataStructures();
     void populateMapList();
     QString getExistingDirectory(QString);
diff --git a/mainwindow.ui b/mainwindow.ui
index 77405325..59f41023 100755
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -228,10 +228,20 @@
                  </widget>
                 </item>
                 <item>
-                 <widget class="QCheckBox" name="checkBox_ToggleGrid">
+                 <widget class="QCheckBox" name="checkBox_smartPaths">
                   <property name="styleSheet">
                    <string notr="true">margin-left: 10px</string>
                   </property>
+                  <property name="text">
+                   <string>Smart Paths</string>
+                  </property>
+                 </widget>
+                </item>
+                <item>
+                 <widget class="QCheckBox" name="checkBox_ToggleGrid">
+                  <property name="styleSheet">
+                   <string notr="true"/>
+                  </property>
                   <property name="text">
                    <string>Show Grid</string>
                   </property>
@@ -250,6 +260,13 @@
                   </property>
                  </spacer>
                 </item>
+                <item>
+                 <widget class="QPushButton" name="pushButton">
+                  <property name="text">
+                   <string>Change Dimensions</string>
+                  </property>
+                 </widget>
+                </item>
                </layout>
               </widget>
              </item>
@@ -291,7 +308,7 @@
                      <x>0</x>
                      <y>0</y>
                      <width>436</width>
-                     <height>621</height>
+                     <height>620</height>
                     </rect>
                    </property>
                    <layout class="QGridLayout" name="gridLayout_8">
diff --git a/map.cpp b/map.cpp
index 2c1189c3..9c76674f 100755
--- a/map.cpp
+++ b/map.cpp
@@ -6,6 +6,7 @@
 #include <QImage>
 #include <QRegularExpression>
 
+
 Map::Map(QObject *parent) : QObject(parent)
 {
     paint_tile_index = 1;
@@ -276,6 +277,7 @@ QPixmap Map::render(bool ignoreCache = false) {
         cacheBlockdata();
         pixmap = pixmap.fromImage(image);
     }
+
     return pixmap;
 }
 
@@ -387,7 +389,7 @@ void Map::drawSelection(int i, int w, int selectionWidth, int selectionHeight, Q
     int y = i / w;
     painter->save();
 
-    QColor penColor = smart_paths_enabled ? QColor(0xff, 0x0, 0xff) : QColor(0xff, 0xff, 0xff);
+    QColor penColor = QColor(0xff, 0xff, 0xff);
     painter->setPen(penColor);
     int rectWidth = selectionWidth * 16;
     int rectHeight = selectionHeight * 16;
@@ -427,6 +429,36 @@ QPixmap Map::renderMetatiles() {
     return QPixmap::fromImage(image);
 }
 
+void Map::setNewDimensionsBlockdata(int newWidth, int newHeight) {
+    int oldWidth = getWidth();
+    int oldHeight = getHeight();
+
+    Blockdata* newBlockData = new Blockdata;
+
+    for (int y = 0; y < newHeight; y++)
+    for (int x = 0; x < newWidth; x++) {
+        if (x < oldWidth && y < oldHeight) {
+            int index = y * oldWidth + x;
+            newBlockData->addBlock(layout->blockdata->blocks->value(index));
+        } else {
+            newBlockData->addBlock(0);
+        }
+    }
+
+    layout->blockdata->copyFrom(newBlockData);
+}
+
+void Map::setDimensions(int newWidth, int newHeight, bool setNewBlockdata) {
+    if (setNewBlockdata) {
+        setNewDimensionsBlockdata(newWidth, newHeight);
+    }
+
+    layout->width = QString::number(newWidth);
+    layout->height = QString::number(newHeight);
+
+    emit mapChanged(this);
+}
+
 Block* Map::getBlock(int x, int y) {
     if (layout->blockdata && layout->blockdata->blocks) {
         if (x >= 0 && x < getWidth())
@@ -445,38 +477,6 @@ void Map::_setBlock(int x, int y, Block block) {
     }
 }
 
-void Map::_floodFill(int x, int y, uint tile) {
-    QList<QPoint> todo;
-    todo.append(QPoint(x, y));
-    while (todo.length()) {
-            QPoint point = todo.takeAt(0);
-            x = point.x();
-            y = point.y();
-            Block *block = getBlock(x, y);
-            if (block == NULL) {
-                continue;
-            }
-            uint old_tile = block->tile;
-            if (old_tile == tile) {
-                continue;
-            }
-            block->tile = tile;
-            _setBlock(x, y, *block);
-            if ((block = getBlock(x + 1, y)) && block->tile == old_tile) {
-                todo.append(QPoint(x + 1, y));
-            }
-            if ((block = getBlock(x - 1, y)) && block->tile == old_tile) {
-                todo.append(QPoint(x - 1, y));
-            }
-            if ((block = getBlock(x, y + 1)) && block->tile == old_tile) {
-                todo.append(QPoint(x, y + 1));
-            }
-            if ((block = getBlock(x, y - 1)) && block->tile == old_tile) {
-                todo.append(QPoint(x, y - 1));
-            }
-    }
-}
-
 void Map::_floodFillCollision(int x, int y, uint collision) {
     QList<QPoint> todo;
     todo.append(QPoint(x, y));
@@ -578,29 +578,48 @@ void Map::_floodFillCollisionElevation(int x, int y, uint collision, uint elevat
 
 
 void Map::undo() {
+    HistoryItem *commit = history.back();
+    if (!commit)
+        return;
+
     if (layout->blockdata) {
-        Blockdata *commit = history.back();
-        if (commit != NULL) {
-            layout->blockdata->copyFrom(commit);
-            emit mapChanged(this);
+        layout->blockdata->copyFrom(commit->metatiles);
+        if (commit->layoutWidth != this->getWidth() || commit->layoutHeight != this->getHeight())
+        {
+            this->setDimensions(commit->layoutWidth, commit->layoutHeight, false);
+            emit mapNeedsRedrawing(this);
         }
+
+        emit mapChanged(this);
     }
 }
 
 void Map::redo() {
+    HistoryItem *commit = history.next();
+    if (!commit)
+        return;
+
     if (layout->blockdata) {
-        Blockdata *commit = history.next();
-        if (commit != NULL) {
-            layout->blockdata->copyFrom(commit);
-            emit mapChanged(this);
+        layout->blockdata->copyFrom(commit->metatiles);
+        if (commit->layoutWidth != this->getWidth() || commit->layoutHeight != this->getHeight())
+        {
+            this->setDimensions(commit->layoutWidth, commit->layoutHeight, false);
+            emit mapNeedsRedrawing(this);
         }
+
+        emit mapChanged(this);
     }
 }
 
 void Map::commit() {
     if (layout->blockdata) {
-        if (!layout->blockdata->equals(history.current())) {
-            Blockdata* commit = layout->blockdata->copy();
+        HistoryItem *item = history.current();
+        bool atCurrentHistory = item
+                && layout->blockdata->equals(item->metatiles)
+                && this->getWidth() == item->layoutWidth
+                && this->getHeight() == item->layoutHeight;
+        if (!atCurrentHistory) {
+            HistoryItem *commit = new HistoryItem(layout->blockdata->copy(), this->getWidth(), this->getHeight());
             history.push(commit);
             emit mapChanged(this);
         }
@@ -615,14 +634,6 @@ void Map::setBlock(int x, int y, Block block) {
     }
 }
 
-void Map::floodFill(int x, int y, uint tile) {
-    Block *block = getBlock(x, y);
-    if (block && block->tile != tile) {
-        _floodFill(x, y, tile);
-        commit();
-    }
-}
-
 void Map::floodFillCollision(int x, int y, uint collision) {
     Block *block = getBlock(x, y);
     if (block && block->collision != collision) {
diff --git a/map.h b/map.h
index a98359a1..1270ce3b 100755
--- a/map.h
+++ b/map.h
@@ -10,6 +10,17 @@
 #include <QDebug>
 #include <QGraphicsPixmapItem>
 
+class HistoryItem {
+public:
+    Blockdata *metatiles;
+    short layoutWidth;
+    short layoutHeight;
+    HistoryItem(Blockdata *metatiles_, short layoutWidth_, short layoutHeight_) {
+        this->metatiles = metatiles_;
+        this->layoutWidth = layoutWidth_;
+        this->layoutHeight = layoutHeight_;
+    }
+};
 
 template <typename T>
 class History {
@@ -173,8 +184,6 @@ public:
     void setBlock(int x, int y, Block block);
     void _setBlock(int x, int y, Block block);
 
-    void floodFill(int x, int y, uint tile);
-    void _floodFill(int x, int y, uint tile);
     void floodFillCollision(int x, int y, uint collision);
     void _floodFillCollision(int x, int y, uint collision);
     void floodFillElevation(int x, int y, uint elevation);
@@ -182,7 +191,7 @@ public:
     void floodFillCollisionElevation(int x, int y, uint collision, uint elevation);
     void _floodFillCollisionElevation(int x, int y, uint collision, uint elevation);
 
-    History<Blockdata*> history;
+    History<HistoryItem*> history;
     void undo();
     void redo();
     void commit();
@@ -194,6 +203,8 @@ public:
 
     QList<Connection*> connections;
     QPixmap renderConnection(Connection);
+    void setNewDimensionsBlockdata(int newWidth, int newHeight);
+    void setDimensions(int newWidth, int newHeight, bool setNewBlockData = true);
 
     QPixmap renderBorder();
     void cacheBorder();
@@ -212,6 +223,7 @@ signals:
     void paintTileChanged(Map *map);
     void paintCollisionChanged(Map *map);
     void mapChanged(Map *map);
+    void mapNeedsRedrawing(Map *map);
     void statusBarMessage(QString);
 
 public slots: