--User changes

-Give tabs a height of 4px in the qss files. Looks a little large on 4k screens, but just right on HD screens which are much more common.
 -Allow for styling of zero and non-zero variation tree nodes via qss.
 -Allow for toggling whether to interpolate between colors in the palette editor, or to do hard cuts between colors.
 -Allow for adjusting spinner values with the + = or up arrow keys to increase, and - _ or down arrow keys to decrease.
 -Allow for responding to global presses of + = and - _ to cycle up or down to specify which xform is set as the current one.
 -Allow for adding "layers" via xaos which will add a user-specified number of xforms, and set certain xaos values to 0 or 1.
 -Add a new menu item under the Edit menu to copy the OpenCL iteration kernel source to the clipboard.
 -Show text on the status bar which indicates that an OpenCL kernel compilation is taking place.
 -Show xform name on xform combo box when expanded. Adjust size to fit all names.
 -Draw post affine circles using dashed lines.
 -Prevent QSS dialog from styling its editor, which makes it easier to see text when creating styles which have custom colors for text boxes.

--Bug fixes
 -Fix up some table layouts which seemed to have regressed/decayed over time for reasons unknown.
 -Using undo/redo would create a new flame in the library every time.
 -Solo was not being preserved when using undo/redo.

--Code changes
 -Make the solo flag be a part of the flame data now.
 -Fix some tabification in the OpenCL code for EllipticVariation.
 -Fix tabification in the varState code for OpenCL.
 -Add an event called m_CompileBegun to RendererCL that is called right before an OpenCL compile is begun.
 --This required making RendererCLBase not a pure virtual base class. Member functions just return defaults.
 -Filter key presses on main window to only process the third one. This is due to Qt triggering three events for every key press.
 -The palette preview table was installing an event filter for seemingly no reason. Remove it.
 -Mark certain virtual functions as override in SpinBox and DoubleSpinBox.

Source/Fractorium/FractoriumXaos.cpp

@@ -22,6 +22,7 @@ void Fractorium::InitXaosUI()
 	connect(m_XaosSpinBox, SIGNAL(valueChanged(double)), this, SLOT(OnXaosChanged(double)), Qt::QueuedConnection);
 	connect(ui.ClearXaosButton, SIGNAL(clicked(bool)), this, SLOT(OnClearXaosButtonClicked(bool)), Qt::QueuedConnection);
 	connect(ui.RandomXaosButton, SIGNAL(clicked(bool)), this, SLOT(OnRandomXaosButtonClicked(bool)), Qt::QueuedConnection);
+	connect(ui.AddLayerButton, SIGNAL(clicked(bool)), this, SLOT(OnAddLayerButtonClicked(bool)), Qt::QueuedConnection);
 	connect(ui.XaosTableView->verticalHeader(), SIGNAL(sectionDoubleClicked(int)), this, SLOT(OnXaosRowDoubleClicked(int)), Qt::QueuedConnection);
 	connect(ui.XaosTableView->horizontalHeader(), SIGNAL(sectionDoubleClicked(int)), this, SLOT(OnXaosColDoubleClicked(int)), Qt::QueuedConnection);
 }
@@ -165,6 +166,49 @@ void FractoriumEmberController<T>::RandomXaos()
 
 void Fractorium::OnRandomXaosButtonClicked(bool checked) { m_Controller->RandomXaos(); }
 
+/// <summary>
+/// Add a layer using the specified number of xforms.
+/// A layer is defined as a new set of xforms whose xaos values are the following:
+/// From existing to existing: unchanged.
+/// From existing to new: 0.
+/// From new to existing: 0.
+/// From new to new: 1.
+/// </summary>
+/// <param name="xforms">The number of new xforms to add to create the layer</param>
+template <typename T>
+void FractoriumEmberController<T>::AddLayer(int xforms)
+{
+	Update([&]
+	{
+		auto origXformCount = m_Ember.XformCount();
+		m_Ember.AddXforms(xforms);
+
+		for (auto i = 0; i < m_Ember.XformCount(); i++)
+		{
+			auto xf = m_Ember.GetXform(i);
+
+			if (i < origXformCount)
+			{
+				for (auto j = 0; j < m_Ember.XformCount(); j++)
+					if (j >= origXformCount)
+						xf->SetXaos(j, 0);
+			}
+			else
+			{
+				for (auto j = 0; j < m_Ember.XformCount(); j++)
+					if (j < origXformCount)
+						xf->SetXaos(j, 0);
+					else
+						xf->SetXaos(j, 1);
+			}
+		}
+	});
+	FillXforms();
+	FillSummary();
+}
+
+void Fractorium::OnAddLayerButtonClicked(bool checked) { m_Controller->AddLayer(ui.AddLayerSpinBox->value()); }
+
 /// <summary>
 /// Toggle all xaos values in one row.
 /// Resets the rendering process.