Initial release

2026-08-16 18:24:52 +07:00
commit 876886a39a
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+// This file is part of VSTGUI. It is subject to the license terms 
+// in the LICENSE file found in the top-level directory of this
+// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
+
+#include "vst3padcontroller.h"
+
+namespace VSTGUI {
+
+//------------------------------------------------------------------------
+PadController::PadController (IController* baseController,
+                              Steinberg::Vst::EditController* editController,
+                              Steinberg::Vst::Parameter* xParam, Steinberg::Vst::Parameter* yParam)
+: DelegationController (baseController)
+, editController (editController)
+, xParam (xParam)
+, yParam (yParam)
+, padControl (nullptr)
+{
+	if (xParam)
+		xParam->addDependent (this);
+	if (yParam)
+		yParam->addDependent (this);
+}
+
+//------------------------------------------------------------------------
+PadController::~PadController ()
+{
+	if (xParam)
+		xParam->removeDependent (this);
+	if (yParam)
+		yParam->removeDependent (this);
+}
+
+//------------------------------------------------------------------------
+CView* PadController::verifyView (CView* view, const UIAttributes& attributes,
+                                  const IUIDescription* description)
+{
+	auto* pad = dynamic_cast<CXYPad*> (view);
+	if (pad)
+	{
+		padControl = pad;
+		padControl->setListener (this);
+		update (xParam, kChanged);
+	}
+	return view;
+}
+
+//------------------------------------------------------------------------
+void PadController::valueChanged (CControl* pControl)
+{
+	if (pControl == padControl && xParam && yParam)
+	{
+		float x, y;
+		CXYPad::calculateXY (pControl->getValue (), x, y);
+
+		auto xId = xParam->getInfo ().id;
+		if (editController->setParamNormalized (xId, x) == Steinberg::kResultTrue)
+			editController->performEdit (xId, editController->getParamNormalized (xId));
+
+		auto yId = yParam->getInfo ().id;
+		if (editController->setParamNormalized (yId, y) == Steinberg::kResultTrue)
+			editController->performEdit (yId, editController->getParamNormalized (yId));
+	}
+	else
+	{
+		DelegationController::valueChanged (pControl);
+	}
+}
+
+//------------------------------------------------------------------------
+void PadController::controlBeginEdit (CControl* pControl)
+{
+	if (pControl == padControl && xParam && yParam)
+	{
+		editController->startGroupEdit ();
+		editController->beginEdit (xParam->getInfo ().id);
+		editController->beginEdit (yParam->getInfo ().id);
+	}
+	else
+	{
+		DelegationController::controlBeginEdit (pControl);
+	}
+}
+
+//------------------------------------------------------------------------
+void PadController::controlEndEdit (CControl* pControl)
+{
+	if (pControl == padControl && xParam && yParam)
+	{
+		editController->endEdit (xParam->getInfo ().id);
+		editController->endEdit (yParam->getInfo ().id);
+		editController->finishGroupEdit ();
+	}
+	else
+	{
+		DelegationController::controlEndEdit (pControl);
+	}
+}
+
+//------------------------------------------------------------------------
+void PLUGIN_API PadController::update (Steinberg::FUnknown* changedUnknown,
+                                       Steinberg::int32 message)
+{
+	if (padControl)
+	{
+		auto* p = Steinberg::FCast<Steinberg::Vst::Parameter> (changedUnknown);
+		if (p && (p == xParam || p == yParam))
+		{
+			if (message == kChanged)
+			{
+				float value =
+				    CXYPad::calculateValue (xParam->getNormalized (), yParam->getNormalized ());
+				padControl->setValue (value);
+				padControl->invalid ();
+			}
+			else if (message == kWillDestroy)
+			{
+				if (xParam)
+					xParam->removeDependent (this);
+				if (yParam)
+					yParam->removeDependent (this);
+				xParam = nullptr;
+				yParam = nullptr;
+			}
+		}
+	}
+}
+
+} // namespace