Use FreeAndNil across the board. Even if we are immediately assigning after, probably avoids accidental mistakes. Also free neglected owner tex on shutdown, and delete hog gears using the normal deletion procedure if for any reason they still exist (EndGame call?).
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>600</width>
<height>400</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralWidget">
<layout class="QGridLayout" name="gridLayout" rowstretch="3,1">
<item row="1" column="2">
<widget class="QPlainTextEdit" name="plainTextEdit"/>
</item>
<item row="0" column="0" rowspan="2">
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<widget class="QPushButton" name="pbUndo">
<property name="text">
<string>Undo</string>
</property>
</widget>
</item>
<item>
<spacer name="verticalSpacer">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>40</height>
</size>
</property>
</spacer>
</item>
<item>
<widget class="QPushButton" name="pbSave">
<property name="text">
<string>Save</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pbLoad">
<property name="text">
<string>Load</string>
</property>
</widget>
</item>
<item>
<widget class="QSpinBox" name="sbBytes">
<property name="readOnly">
<bool>true</bool>
</property>
<property name="buttonSymbols">
<enum>QAbstractSpinBox::NoButtons</enum>
</property>
<property name="suffix">
<string> bytes</string>
</property>
<property name="maximum">
<number>999999</number>
</property>
</widget>
</item>
</layout>
</item>
<item row="0" column="2">
<widget class="DrawMapWidget" name="drawMapWidget" native="true"/>
</item>
</layout>
</widget>
</widget>
<layoutdefault spacing="6" margin="11"/>
<customwidgets>
<customwidget>
<class>DrawMapWidget</class>
<extends>QWidget</extends>
<header>drawmapwidget.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>