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
+
+#pragma once
+
+#include "../lib/vstguifwd.h"
+#include <list>
+#include <string>
+
+namespace VSTGUI {
+class IUIDescription;
+class UIAttributes;
+
+//-----------------------------------------------------------------------------
+/// @brief View creator interface
+///	@ingroup new_in_4_0
+//-----------------------------------------------------------------------------
+class IViewCreator
+{
+public:
+	using string = std::string;
+	using StringList = std::list<string>;
+	using ConstStringPtrList = std::list<const string*>;
+
+	virtual ~IViewCreator () noexcept = default;
+
+	enum AttrType
+	{
+		kUnknownType,
+		kBooleanType,
+		kIntegerType,
+		kFloatType,
+		kStringType,
+		kColorType,
+		kFontType,
+		kBitmapType,
+		kPointType,
+		kRectType,
+		kTagType,
+		kListType,
+		kGradientType,
+		kScriptType,
+	};
+
+	virtual IdStringPtr getViewName () const = 0;
+	virtual IdStringPtr getBaseViewName () const = 0;
+	virtual CView* create (const UIAttributes& attributes,
+	                       const IUIDescription* description) const = 0;
+	virtual bool apply (CView* view, const UIAttributes& attributes,
+	                    const IUIDescription* description) const = 0;
+	virtual bool getAttributeNames (StringList& attributeNames) const = 0;
+	virtual AttrType getAttributeType (const string& attributeName) const = 0;
+	virtual bool getAttributeValue (CView* view, const string& attributeName, string& stringValue,
+	                                const IUIDescription* desc) const = 0;
+	// optional list type support
+	virtual bool getPossibleListValues (const string& attributeName,
+	                                    ConstStringPtrList& values) const = 0;
+	// optional value range
+	virtual bool getAttributeValueRange (const string& attributeName, double& minValue,
+	                                     double& maxValue) const = 0;
+	// optional display name
+	virtual UTF8StringPtr getDisplayName () const = 0;
+};
+
+//-----------------------------------------------------------------------------
+/// @brief View creator interface adapter
+//-----------------------------------------------------------------------------
+class ViewCreatorAdapter : public IViewCreator
+{
+public:
+	bool apply (CView* view, const UIAttributes& attributes,
+	            const IUIDescription* description) const override
+	{
+		return true;
+	}
+	bool getAttributeNames (StringList& attributeNames) const override { return true; }
+	AttrType getAttributeType (const string& attributeName) const override { return kUnknownType; }
+	bool getAttributeValue (CView* view, const string& attributeName, string& stringValue,
+	                        const IUIDescription* desc) const override
+	{
+		return false;
+	}
+	bool getPossibleListValues (const string& attributeName,
+	                            ConstStringPtrList& values) const override
+	{
+		return false;
+	}
+	bool getAttributeValueRange (const string& attributeName, double& minValue,
+	                             double& maxValue) const override
+	{
+		return false;
+	}
+	UTF8StringPtr getDisplayName () const override { return getViewName (); }
+};
+
+} // VSTGUI