--User changes

Add the ability to apply operations to a selection of xforms, rather than just the current one.
 Update tool tips accordingly.

--Bug fixes
 Fix NAN in equalized weight calculation when all weights are set to 0.

--Code changes
 Clean up strange nested usage of Update([&]()) calls when changing xform color index via either the spinner or scroll bar. Made no sense.
 Make ISAAC RandBit() use RandByte() to be slightly more efficient.
 Put FillXforms() in the controller where it belongs, rather than the main window class.
 Add UpdateXform() function to the controller to handle applying operations to multiple xforms.
 Remove the word "Current" out of most xform related functions because they now operate on whatever is selected.
 Properly use Update() for various xform operations whereas before it was manually calling UpdateRender().
 Also properly use Update() in places where it was erroneously using UpdateXform() for things that did not involve xforms.
 Block signals in FillXaosTable().
 Add new file named FractoriumXformsSelect.cpp to handle new xform selection code.

Source/Fractorium/FractoriumEmberController.cpp

@@ -224,21 +224,79 @@ void FractoriumEmberController<T>::Update(std::function<void (void)> func, bool
 }
 
 /// <summary>
-/// Wrapper to call a function on the current xform, then optionally add the requested action to the rendering queue.
+/// Wrapper to call a function on the specified xforms, then optionally add the requested action to the rendering queue.
+/// If no xforms are selected via the checkboxes, and the update type is UPDATE_SELECTED, then the function will be called only on the currently selected xform.
 /// </summary>
 /// <param name="func">The function to call</param>
+/// <param name="updateType">Whether to apply this update operation on the current, all or selected xforms. Default: UPDATE_CURRENT.</param>
 /// <param name="updateRender">True to update renderer, else false. Default: true.</param>
 /// <param name="action">The action to add to the rendering queue. Default: FULL_RENDER.</param>
 template <typename T>
-void FractoriumEmberController<T>::UpdateCurrentXform(std::function<void (Xform<T>*)> func, bool updateRender, eProcessAction action)
+void FractoriumEmberController<T>::UpdateXform(std::function<void(Xform<T>*)> func, eXformUpdate updateType, bool updateRender, eProcessAction action)
 {
-	if (Xform<T>* xform = CurrentXform())
-	{
-		func(xform);
+	size_t i = 0;
+	bool isCurrentFinal = m_Ember.IsFinalXform(CurrentXform());
+	bool doFinal = updateType != eXformUpdate::UPDATE_SELECTED_EXCEPT_FINAL && updateType != eXformUpdate::UPDATE_ALL_EXCEPT_FINAL;
 
-		if (updateRender)
-			UpdateRender(action);
+	switch (updateType)
+	{
+		case eXformUpdate::UPDATE_CURRENT:
+		{
+			if (Xform<T>* xform = CurrentXform())
+				func(xform);
+		}
+		break;
+
+		case eXformUpdate::UPDATE_SELECTED:
+		case eXformUpdate::UPDATE_SELECTED_EXCEPT_FINAL:
+		{
+			bool anyUpdated = false;
+
+			while (Xform<T>* xform = (doFinal ? m_Ember.GetTotalXform(i) : m_Ember.GetXform(i)))
+			{
+				if (QLayoutItem* child = m_Fractorium->m_XformsSelectionLayout->itemAt(i))
+				{
+					if (auto* w = dynamic_cast<QCheckBox*>(child->widget()))
+					{
+						if (w->isChecked())
+						{
+							func(xform);
+							anyUpdated = true;
+						}
+					}
+				}
+
+				i++;
+			}
+
+			if (!anyUpdated)//None were selected, so just apply to the current.
+				if (doFinal || !isCurrentFinal)//If do final, call func regardless. If not, only call if current is not final.
+					if (Xform<T>* xform = CurrentXform())
+						func(xform);
+		}
+
+		break;
+
+		case eXformUpdate::UPDATE_ALL:
+		{
+			while (Xform<T>* xform = m_Ember.GetTotalXform(i++))
+				func(xform);
+		}
+
+		break;
+
+		case eXformUpdate::UPDATE_ALL_EXCEPT_FINAL:
+		default:
+		{
+			while (Xform<T>* xform = m_Ember.GetXform(i++))
+				func(xform);
+		}
+
+		break;
 	}
+
+	if (updateRender)
+		UpdateRender(action);
 }
 
 /// <summary>
@@ -276,7 +334,7 @@ void FractoriumEmberController<T>::SetEmberPrivate(const Ember<U>& ember, bool v
 #endif
 
 	m_GLController->ResetMouseState();
-	m_Fractorium->FillXforms();//Must do this first because the palette setup in FillParamTablesAndPalette() uses the xforms combo.
+	FillXforms();//Must do this first because the palette setup in FillParamTablesAndPalette() uses the xforms combo.
 	FillParamTablesAndPalette();
 
 	//If a resize happened, this won't do anything because the new size is not reflected in the scroll area yet.