Add pimpl Internal* struct to several classes that have a possibility of needing more member variables in 2.x.

include/app/CableWidget.hpp

@@ -12,6 +12,9 @@ namespace app {
 
 
 struct CableWidget : widget::OpaqueWidget {
+	struct Internal;
+	Internal* internal;
+
 	/** Owned. */
 	engine::Cable* cable = NULL;
 	NVGcolor color;

include/app/ParamWidget.hpp

@@ -12,6 +12,9 @@ namespace app {
 
 /** Manages an engine::Param on a ModuleWidget. */
 struct ParamWidget : widget::OpaqueWidget {
+	struct Internal;
+	Internal* internal;
+
 	engine::Module* module = NULL;
 	int paramId = -1;
 
@@ -19,6 +22,8 @@ struct ParamWidget : widget::OpaqueWidget {
 	/** For triggering the Change event. `*/
 	float lastValue = NAN;
 
+	ParamWidget();
+	~ParamWidget();
 	/** Configures ParamQuantity properties based on the type of ParamWidget.
 	This seems a bit hacky, but it's easier than requiring plugin developers to set `ParamQuantity::randomizeEnabled`, etc.
 	*/

include/app/PortWidget.hpp

@@ -13,6 +13,9 @@ namespace app {
 
 /** Manages an engine::Port on a ModuleWidget. */
 struct PortWidget : widget::OpaqueWidget {
+	struct Internal;
+	Internal* internal;
+
 	engine::Module* module = NULL;
 	engine::Port::Type type = engine::Port::INPUT;
 	int portId = -1;

include/app/RackWidget.hpp

@@ -17,6 +17,9 @@ namespace app {
 
 /** Container for ModuleWidget and CableWidget. */
 struct RackWidget : widget::OpaqueWidget {
+	struct Internal;
+	Internal* internal;
+
 	widget::Widget* moduleContainer;
 	widget::Widget* cableContainer;
 	CableWidget* incompleteCable = NULL;

include/patch.hpp

@@ -8,6 +8,9 @@ namespace rack {
 
 
 struct PatchManager {
+	struct Internal;
+	Internal* internal;
+
 	/** The currently loaded patch file path */
 	std::string path;
 	/** Path to autosave folder */

src/app/CableWidget.cpp

@@ -12,6 +12,7 @@
 namespace rack {
 namespace app {
 
+
 CableWidget::CableWidget() {
 	color = color::BLACK_TRANSPARENT;
 }

src/app/ParamWidget.cpp

@@ -152,6 +152,9 @@ engine::ParamQuantity* ParamWidget::getParamQuantity() {
 	return module->paramQuantities[paramId];
 }
 
+ParamWidget::ParamWidget() {}
+ParamWidget::~ParamWidget() {}
+
 void ParamWidget::createTooltip() {
 	if (!settings::tooltips)
 		return;