Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/lib/itouchevent.h

@@ -0,0 +1,90 @@
+// 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 "vstguifwd.h"
+#include "cpoint.h"
+
+#if VSTGUI_TOUCH_EVENT_HANDLING
+
+#include <map>
+
+namespace VSTGUI {
+
+//-----------------------------------------------------------------------------
+//! @brief a touch event
+///	@ingroup new_in_4_2
+//-----------------------------------------------------------------------------
+class ITouchEvent
+{
+public:
+	enum TouchState {
+		kBegan,
+		kMoved,
+		kEnded,
+		kNoChange,
+		kCanceled,
+		kUndefined
+	};
+	struct Touch {
+		double timeStamp;
+		TouchState state;
+		CPoint location;
+		CView* target;
+		bool targetIsSingleTouch;
+		uint32_t tapCount;
+		
+		Touch () : timeStamp (0), state (kUndefined), target (0), targetIsSingleTouch (false), tapCount (0) {}
+	};
+	using TouchPair = std::pair<int32_t, ITouchEvent::Touch>;
+	using TouchMap = std::map<int32_t, Touch>;
+	
+	int32_t numTouches () const { return static_cast<int32_t> (touches.size ()); }
+	
+	TouchMap::const_iterator begin () const { return touches.begin (); }
+	TouchMap::const_iterator end () const { return touches.end (); }
+	
+	const Touch* find (int32_t identifier) const
+	{
+		TouchMap::const_iterator it = touches.find (identifier);
+		if (it != touches.end ())
+			return &(it->second);
+		return 0;
+	}
+	
+	bool setTouchTarget (int32_t identifier, CView* view, bool targetIsSingleTouch)
+	{
+		TouchMap::iterator it = touches.find (identifier);
+		if (it != touches.end () && it->second.target == 0)
+		{
+			it->second.target = view;
+			it->second.targetIsSingleTouch = targetIsSingleTouch;
+			return true;
+		}
+		return false;
+	}
+	
+	bool unsetTouchTarget (int32_t identifier, CView* view)
+	{
+		TouchMap::iterator it = touches.find (identifier);
+		if (it != touches.end () && it->second.target == view)
+		{
+			it->second.target = nullptr;
+			return true;
+		}
+		return false;
+	}
+
+	virtual double getTimeStamp () const = 0;
+protected:
+	ITouchEvent () {}
+	virtual ~ITouchEvent () noexcept = default;
+
+	TouchMap touches;
+};
+
+} // VSTGUI
+
+#endif // VSTGUI_TOUCH_EVENT_HANDLING