Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/lib/controls/cscrollbar.h

@@ -0,0 +1,113 @@
+// 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 "ccontrol.h"
+#include "../ccolor.h"
+
+namespace VSTGUI {
+
+//-----------------------------------------------------------------------------
+// CScrollbar Declaration
+//! @brief a scrollbar control
+/// @ingroup controls
+//-----------------------------------------------------------------------------
+class CScrollbar : public CControl
+{
+public:
+	enum ScrollbarDirection {
+		kHorizontal,
+		kVertical
+	};
+	
+	CScrollbar (const CRect& size, IControlListener* listener, int32_t tag, ScrollbarDirection style, const CRect& scrollSize);
+	CScrollbar (const CScrollbar& scrollbar);
+	
+	//-----------------------------------------------------------------------------
+	/// @name CScrollbar Methods
+	//-----------------------------------------------------------------------------
+	//@{
+	virtual void setDrawer (IScrollbarDrawer* d) { drawer = d; }
+	virtual void setScrollSize (const CRect& ssize);
+	virtual void setStep (float newStep) { stepValue = newStep; }
+	
+	CRect& getScrollSize (CRect& rect) const { rect = scrollSize; return rect; }
+	float getStep () const { return stepValue; }
+	
+	virtual void setFrameColor (const CColor& color) { frameColor = color; }
+	virtual void setScrollerColor (const CColor& color) { scrollerColor = color; }
+	virtual void setBackgroundColor (const CColor& color) { backgroundColor = color; }
+	
+	CColor getFrameColor () const { return frameColor; }
+	CColor getScrollerColor () const { return scrollerColor; }
+	CColor getBackgroundColor () const { return backgroundColor; }
+	
+	bool getOverlayStyle () const { return overlayStyle; }
+	virtual void setOverlayStyle (bool state);
+
+	void setMinScrollerLength (CCoord length);
+	CCoord getMinScrollerLength () const { return minScrollerLenght; }
+
+	virtual void onVisualChange ();
+	CRect getScrollerRect ();
+	//@}
+	
+	// overwrite
+	void draw (CDrawContext* pContext) override;
+	void onMouseWheelEvent (MouseWheelEvent& event) override;
+	CMouseEventResult onMouseDown (CPoint& where, const CButtonState& buttons) override;
+	CMouseEventResult onMouseUp (CPoint& where, const CButtonState& buttons) override;
+	CMouseEventResult onMouseMoved (CPoint& where, const CButtonState& buttons) override;
+	CMouseEventResult onMouseCancel () override;
+	CMessageResult notify (CBaseObject* sender, IdStringPtr message) override;
+	void setViewSize (const CRect& newSize, bool invalid) override;
+	
+	CMouseEventResult onMouseEntered (CPoint& where, const CButtonState& buttons) override;
+	CMouseEventResult onMouseExited (CPoint& where, const CButtonState& buttons) override;
+	
+	CLASS_METHODS(CScrollbar, CControl)
+	//-----------------------------------------------------------------------------
+protected:
+	~CScrollbar () noexcept override = default;
+
+	void drawBackground (CDrawContext* pContext);
+	void drawScroller (CDrawContext* pContext, const CRect& size);
+	
+	void calculateScrollerLength ();
+	void doStepping ();
+	
+	ScrollbarDirection direction;
+	CRect scrollSize;
+	CRect scrollerArea;
+	
+	float stepValue;
+	CCoord scrollerLength;
+	CCoord minScrollerLenght {8.0};
+
+	CColor frameColor;
+	CColor scrollerColor;
+	CColor backgroundColor;
+	
+	bool overlayStyle;
+	bool mouseIsInside;
+	
+	IScrollbarDrawer* drawer;
+private:
+	SharedPointer<CVSTGUITimer> timer;
+	CPoint startPoint;
+	CRect scrollerRect;
+	bool scrolling;
+};
+
+//-----------------------------------------------------------------------------
+class IScrollbarDrawer
+//-----------------------------------------------------------------------------
+{
+public:
+	virtual void drawScrollbarBackground (CDrawContext* pContext, const CRect& size, CScrollbar::ScrollbarDirection direction, CScrollbar* bar) = 0;
+	virtual void drawScrollbarScroller (CDrawContext* pContext, const CRect& size, CScrollbar::ScrollbarDirection direction, CScrollbar* bar) = 0;
+};
+
+} // VSTGUI