Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/lib/viewlayouter/baseviewlayouter.h

@@ -0,0 +1,80 @@
+// 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
+
+#pragma once
+
+#include "../iviewlayouter.h"
+#include <vector>
+
+//------------------------------------------------------------------------
+namespace VSTGUI {
+
+//------------------------------------------------------------------------
+struct BaseViewLayouterEntry
+{
+	uint64_t viewId {};
+	CRect viewSize {};
+	CRect mouseSize {};
+	std::optional<ViewLayout> childLayout {};
+};
+
+//------------------------------------------------------------------------
+/** a base class for view layouters
+ *
+ *	@ingroup new_in_4_15
+ */
+class BaseViewLayouter : public IViewLayouter
+{
+public:
+	using LayoutData = std::vector<BaseViewLayouterEntry>;
+
+	bool applyLayout (CViewContainer& container, const Children& children,
+					  const ViewLayout& layout) override;
+};
+
+//------------------------------------------------------------------------
+inline bool BaseViewLayouter::applyLayout (CViewContainer& container, const Children& children,
+										   const ViewLayout& layout)
+{
+	auto layoutData = std::any_cast<const LayoutData> (&layout.data);
+	if (layoutData == nullptr)
+	{
+		vstgui_assert (false, "BaseViewLayouter: Unexpected layout data");
+		return false;
+	}
+	auto childIt = children.begin ();
+	auto childEnd = children.end ();
+	for (const auto& entry : *layoutData)
+	{
+		while (childIt != childEnd && (*childIt)->getRuntimeID () != entry.viewId)
+			++childIt;
+
+		if (childIt == childEnd)
+			continue;
+
+		auto doSetViewSize = true;
+		auto& child = *childIt;
+		if (auto childContainer = child->asViewContainer ())
+		{
+			if (entry.childLayout)
+			{
+				if (!childContainer->applyViewLayout (*entry.childLayout))
+					return false;
+				doSetViewSize = false;
+			}
+		}
+		if (doSetViewSize)
+		{
+			child->setViewSize (entry.viewSize, true);
+			child->setMouseableArea (entry.mouseSize == entry.viewSize ? child->getViewSize ()
+																	   : entry.mouseSize);
+		}
+	}
+	container.setViewSize (layout.size);
+	container.setMouseableArea (layout.size);
+	return true;
+}
+
+//------------------------------------------------------------------------
+} // VSTGUI